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Journal articles on the topic 'Poly(vinyl alcohol) PVA hydrogels'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Zheng, Jing Jing, and Xiao Liang Gui. "Swelling and Antibacterial Properties of Chitosan/Poly(vinyl alcohol) Hybrid Hydrogels." Applied Mechanics and Materials 672-674 (October 2014): 737–40. http://dx.doi.org/10.4028/www.scientific.net/amm.672-674.737.

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Chitosan (CTS) was added into poly (vinyl alcohol) (PVA) hydrogels to get their antibacterial properties. A series of CTS/PVA hybrid hydrogels were prepared by freezing/thawing method. The swelling properties of all hybrid hydrogels are better than those of the original PVA hydrogel. The CTS/PVA hybrid hydrogels show excellent antimicrobial performance towards Escherichia colis.

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2

Asa'di, Sima, Masoud Frounchi, and Susan Dadbin. "Nanomagnetic Poly(vinyl alcohol) Hydrogels." Advanced Materials Research 829 (November 2013): 539–43. http://dx.doi.org/10.4028/www.scientific.net/amr.829.539.

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Surface modified magnetic nanoparticles (M-NPs) were synthetized and stabilized in poly (vinyl-alcohol) solution. The solutions with various magnetic nanoparticles contents were gamma-irradiated and magnetic poly (vinyl-alcohol) (M-PVA) hydrogels were synthesized. The magnetic hydrogels and also the un-irradiated magnetic poly (vinyl alcohol) nanocomposite films were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), Fourier transform infrared spectroscopy (FTIR) and mechanical measurement. The M-NPs were uniformly dispersed in th

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3

Zhang, Mian Mian, Yu Xi Chen та Xia Ma. "Swelling Kinetic Study of Poly(Vinyl Alcohol)/Poly(γ-Glutamic Acid) Blend Hydrogel". Advanced Materials Research 1095 (березень 2015): 423–26. http://dx.doi.org/10.4028/www.scientific.net/amr.1095.423.

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In this article, the swelling behavior and swelling kinetic of poly (vinyl alcohol)/poly (γ-glutamic acid) hydrogel were investigated. It was found that the PGA/PVA hydrogels revealed the pH-sensitive property and exhibited a faster swelling at pH7.4. The study of swelling kinetics revealed that the swelling mechanism followed the non-Fickian diffusion mechanism.

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4

Lu, Jingqiong, Yinhui Li, Deng Hu, et al. "Synthesis and Properties of pH-, Thermo-, and Salt-Sensitive Modified Poly(aspartic acid)/Poly(vinyl alcohol) IPN Hydrogel and Its Drug Controlled Release." BioMed Research International 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/236745.

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Modified poly(aspartic acid)/poly(vinyl alcohol) interpenetrating polymer network (KPAsp/PVA IPN) hydrogel for drug controlled release was synthesized by a simple one-step method in aqueous system using poly(aspartic acid) grafting 3-aminopropyltriethoxysilane (KH-550) and poly(vinyl alcohol) (PVA) as materials. The hydrogel surface morphology and composition were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The thermal stability was analyzed by thermogravimetric analysis (TGA). The swelling properties and pH, temperature, and salt sen

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5

Devi, Ch Shanti, S. Manimukta Devi, and N. Shubhaschandra Singh. "Removal of Selective Metal Ions from Water with Hydroxy Propyl Cellulose Hydrogel." Asian Journal of Chemistry 31, no. 3 (2019): 602–6. http://dx.doi.org/10.14233/ajchem.2019.21691.

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In this study, environmentally friendly hydrogels prepared from hydroxy propyl cellulose hydrogels blended with poly(vinyl alcohol) (PVA) and poly(vinyl pyrrolidone) (PVP) were employed to absorb selected metal ions of Cu and Fe to find potential applications in removal of metal ion from water or in wastewater treatment. Highest adsorption capacity of hydroxy propyl cellulose hydrogels blended with PVA or PVP is shown at 0.04 % (w/v) of the metal ion solutions. Hydroxy propyl cellulose hydrogel when blended PVA has shown greater adsorption of Fe(III) ion than Cu(II) ion at higher pH. Hydroxy p

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6

Diken, Mehmet Emin, Berna Koçer Kizilduman, Begümhan Yilmaz Kardaş, et al. "Synthesis, characterization, and their some chemical and biological properties of PVA/PAA/nPS hydrogel nanocomposites: Hydrogel and wound dressing." Journal of Bioactive and Compatible Polymers 35, no. 3 (2020): 203–15. http://dx.doi.org/10.1177/0883911520921474.

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The nanocomposite hydrogels were prepared by dispersing of the nanopomegranate seed particles into poly(vinyl alcohol)/poly(acrylic acid) blend matrix in an aqueous medium by the solvent casting method. These hydrogels were characterized using scanning electron microscopy, Fourier transform infrared spectra, differential scanning calorimetry, and optical contact angle instruments. The nanopomegranate seed, blend, and hydrogel nanocomposites were tested for microbial activity. In addition, cytocompatibilities of these blend and hydrogel nanocomposites/composites were tested on human lymphocyte

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7

Luo, Xiao Bing, Ming Feng Ma, and Xian Ju Zhou. "Hydroxyapatite-Poly(Vinyl Alcohol)-Sodium Alginate Porous Hydrogels with Poly(Vinyl Alcohol) Surface Layer Used for Articular Cartilage Repair." Materials Science Forum 852 (April 2016): 1155–61. http://dx.doi.org/10.4028/www.scientific.net/msf.852.1155.

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The double-layered PVA/nanohydroxyapatite (nHA)-poly (vinyl alcohol)(PVA)-sodium alginate (SA) porous composite scaffolds used as synthetic articular cartilage were prepared by the freeze-thawing method, gas foaming method and crosslink method of Ca2+ ion, i.e., upper PVA layer for the cartilage substitute and underlying SA30 porous hydrogels for bone bonding. The microstructure and morphology of composite hydrogels were characterized using scanning electronic microscopy (SEM).It had high porosity and uniform pores. The content of HA in SA30 matrix were tested by Energy-dispersive X-ray spectr

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8

Nkhwa, Shathani, Kristo Fernando Lauriaga, Evren Kemal, and Sanjukta Deb. "Poly(vinyl alcohol): Physical Approaches to Designing Biomaterials for Biomedical Applications." Conference Papers in Science 2014 (March 20, 2014): 1–7. http://dx.doi.org/10.1155/2014/403472.

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Poly(vinyl alcohol) is a non-toxic, biosynthetic polymer and biocompatible polymer that has the ability to form hydrogels either via chemical or physical crosslinking. Whilst chemical crosslinking provides greater control on the properties of the resultant hydrogel, physically crosslinked hydrogels or blends with other biocompatible polymers are more suited for biomedical applications. In this paper we report a systematic study on the effect of varying concentrations of PVA, physical methods of crosslinking, and PVA-gelatin and PVA-PVP blends on the physical and mechanical properties of the hy

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9

Zitouni, Mohammed Amine, and Sofia Borsali Kara Slimane. "Preparation and Characterization of Hydrogels Based on Chitsoan/Polyvinyl Alcohol Blends." Advanced Materials Research 1105 (May 2015): 203–7. http://dx.doi.org/10.4028/www.scientific.net/amr.1105.203.

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In this study, a series of poly (vinyl alcohol) (PVA)/chitosan (CS) hydrogels with different weight ratio of PVA to CS were prepared by freezing-thawing (F-T) method. The structure, morphology, and crystallinity of hydrogels were investigated by Fourier Transform Infrared (FT-IR), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). FTIR demonstrated the presence of strong intermolecular hydrogen bonds between CS and PVA molecules. SEM images showed that the higher the chitosan, the greater the porous size of the hydrogel and DSC confirmed that crystallinity is highe

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10

Zhang, Yabin, Lei Ye, Man Cui, et al. "Physically crosslinked poly(vinyl alcohol)–carrageenan composite hydrogels: pore structure stability and cell adhesive ability." RSC Advances 5, no. 95 (2015): 78180–91. http://dx.doi.org/10.1039/c5ra11331h.

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11

Asoh, Taka-Aki, Kohtaroh Takaishi, and Akihiko Kikuchi. "Adhesion of poly(vinyl alcohol) hydrogels by the electrophoretic manipulation of phenylboronic acid copolymers." Journal of Materials Chemistry B 3, no. 33 (2015): 6740–45. http://dx.doi.org/10.1039/c5tb00569h.

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12

Feldman, Dorel. "Poly(Vinyl Alcohol) Recent Contributions to Engineering and Medicine." Journal of Composites Science 4, no. 4 (2020): 175. http://dx.doi.org/10.3390/jcs4040175.

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Poly(vinyl alcohol) (PVA) is a thermoplastic synthetic polymer, which, unlike many synthetic polymers, is not obtained by polymerization, but by hydrolysis of poly(vinyl acetate) (PVAc). Due to the presence of hydroxylic groups, hydrophilic polymers such as PVA and its composites made mainly with biopolymers are used for producing hydrogels that possess interesting morphological and physico-mechanical features. PVA hydrogels and other PVA composites are studied in light of their numerous application for electrical film membranes for chemical separation, element and dye removal, adsorption of m

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13

Teodorescu, Mirela, Simona Morariu, Maria Bercea, and Liviu Săcărescu. "Viscoelastic and structural properties of poly(vinyl alcohol)/poly(vinylpyrrolidone) hydrogels." RSC Advances 6, no. 46 (2016): 39718–27. http://dx.doi.org/10.1039/c6ra04319d.

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14

Yuan, Kun, Xiao Fang Wang, Yuan Cheng Zhu, and Guo Fang Zuo. "Preparation of the Microsphere-Sized Poly(N-Isopropylacrylamide) Hydrogel Dispersed in Poly(Vinyl Alcohol) Matrix and its Thermo-Responsive Releasing Behavior." Advanced Materials Research 311-313 (August 2011): 2084–88. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.2084.

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A novel thermo-responsive microsphere-sized poly(N-isopropylacrylamide) (PNIPAm) composite hydrogels were prepared by gelation of poly(vinyl alcohol) (PVA) solution containing ultra-fine CaCO3, then treated with 2wt% glutaraldehyde solution, sequencely with HCl acid, and PVA matrix with microsphere-sized pores obtained. The internal pores of the dry PVA matrix were filled with PNIPAm hydrogels to give a thermo-responsive composite hydrogels for drug carrier. The composite hydrogel was characterized via scanning electron microscopy (SEM), temperature dependence of equilibrium swelling ratio in

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15

Jing, Zhanxin, Aixing Xu, Yan-Qiu Liang, et al. "Biodegradable Poly(acrylic acid-co-acrylamide)/Poly(vinyl alcohol) Double Network Hydrogels with Tunable Mechanics and High Self-healing Performance." Polymers 11, no. 6 (2019): 952. http://dx.doi.org/10.3390/polym11060952.

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We proposed a novel strategy in the fabrication of biodegradable poly(acrylic acid-co-acrylamide)/poly(vinyl alcohol) (P(AAc-co-Am)/PVA) double network (DN) hydrogels with good mechanical and self-healing properties. In the DN hydrogel system, P(AAc-co-Am) polymers form a network through the ionic coordinates between –COO– and Fe3+ and hydrogen bonding between –COOH and –CONH2, while another network is fabricated by the complexation between PVA and borax. The influences of the composition on the rheological behaviors and mechanical properties of the synthesized DN hydrogels were investigated.

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16

Marinovic-Cincovic, Milena, Aleksandra Radosavljevic, Jelena Krstic, et al. "Physico-chemical characteristics of gamma irradiation crosslinked poly(vinyl alcohol)/magnetite ferrogel composite." Chemical Industry 68, no. 6 (2014): 743–53. http://dx.doi.org/10.2298/hemind141104081m.

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Magnetic field sensitive gels, ferrogels are new promising class of hydrogels. The coupling of hydrogels and magnetic particles has potential application in soft actuators such as artificial muscles or for hyperthermia application. Here a composite of magnetite particles (Fe3O4) and poly(vinyl alcohol) (PVA) hydrogel is developed using gamma irradiation as a crosslinking agent. PVA and Fe3O4 were chosen because of their well-established biocompatibility, radiation crosslinking potential (PVA), mild magnetic properties and the Curie point near desired heating temperature range (Fe3O4). Physico-

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17

Frounchi, Masoud, Susan Dadbin, and Sara Haddadi. "Poly (vinyl alcohol)/nano-diamond composite films and hydrogels prepared by gamma ray." Journal of Polymer Engineering 38, no. 9 (2018): 857–62. http://dx.doi.org/10.1515/polyeng-2017-0290.

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Abstract Poly (vinyl alcohol) and nano-diamond, PVA/ND, hydrogels were prepared and assessed as prosthetic material suitable for replacement of the nucleus pulposus. The hydrogels were prepared by gamma irradiation at various doses (15 kGy, 25 kGy, 35 kGy, 45 kGy) and at various ND concentrations ranging from 0.25 wt.% to 3 wt.%. Extent of gelation, equilibrium water content, and viscoelastic properties of swelled hydrogels at definite water contents were measured and examined as a function of ND concentration as well as gamma dose. According to viscoelastic measurements, the strength of hydro

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18

Lužajić Božinovski, Tijana, Danica Marković, Vera Todorović, et al. "In Vivo Investigation of Soft Tissue Response of Novel Silver/Poly(Vinyl Alcohol)/ Graphene and Silver/Poly(Vinyl Alcohol)/Chitosan/Graphene Hydrogels Aimed for Medical Applications – The First Experience." Acta Veterinaria 68, no. 3 (2018): 321–39. http://dx.doi.org/10.2478/acve-2018-0027.

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Abstract In this paper, we have shown for the fi rst time the soft tissue response of novel silver/ poly(vinyl alcohol)/graphene (Ag/PVA/Gr) and silver/poly(vinyl alcohol)/chitosan/ graphene (Ag/PVA/CHI/Gr) nanocomposite hydrogels aimed for medical applications. These novel hydrogels were produced by in situ electrochemical synthesis of silver nanoparticles in the polymer matrices as described in our previously published works. Both Ag/PVA/Gr and Ag/PVA/CHI/Gr, as well as controls Ag/PVA, Ag/PVA/CHI and commercial Suprasorb©hydrogel discs, were implanted in the subcutaneous tissue of rats. Imp

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19

Tan, Jue, Yu Dong Zheng, Ru Tian, Shi Bo Zhang, and Hong Yan Chen. "Interfacial Combination and Mechanical Properties of BC/PVA Multilayer Composite Hydrogels." Advanced Materials Research 335-336 (September 2011): 116–19. http://dx.doi.org/10.4028/www.scientific.net/amr.335-336.116.

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Bacterial cellulose (BC)/Poly vinyl alcohol (PVA) multilayer composite hydrogels were prepared by freezing and thawing. The mechanical properties of the composite were investigated in this paper with different mass percent of PVA, number of BC layers. Scanning electron microscope (SEM) was used to characterize the fracture characterizations of the composite and the interface structure between BC membrane and PVA hydrogel. It was found that composite hydrogels with 15wt% PVA and 2 layers BC membranes exhibit excellent mechanical properties and wonderful bonding effect of the interface.

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20

Samoila, Iuliana, Sorina Dinescu, Gratiela Gradisteanu Pircalabioru, et al. "Pullulan/Poly(Vinyl Alcohol) Composite Hydrogels for Adipose Tissue Engineering." Materials 12, no. 19 (2019): 3220. http://dx.doi.org/10.3390/ma12193220.

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Composite hydrogels based on pullulan (HP) and poly(vinyl alcohol) (PVA) were both prepared by simple chemical crosslinking with sodium trimethaphosphate (STMP) or by dual crosslinking (simultaneously chemical crosslinking with STMP and physical crosslinking by freeze-thaw technique). The resulting hydrogels and cryogels were designed for tissue engineering applications. PVA, with two different molecular weights (47,000 and 125,000 g/mol; PVA47 and PVA125, respectively), as well as different P/PVA weight ratios were tested. The physico-chemical characterization of the hydrogels was performed b

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21

Taniguchi, Takuro, and Kenji Urayama. "Linear Dynamic Viscoelasticity of Dual Cross-Link Poly(Vinyl Alcohol) Hydrogel with Determined Borate Ion Concentration." Gels 7, no. 2 (2021): 71. http://dx.doi.org/10.3390/gels7020071.

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We investigated the linear dynamic viscoelasticity of dual cross-link (DC) poly(vinyl alcohol) (PVA) (DC-PVA) hydrogels with permanent and transient cross-links. The concentrations of incorporated borate ions to form transient cross-links in the DC-PVA hydrogels (CBIN) were determined by the azomethine-H method. The dynamic viscoelasticity of the DC-PVA hydrogel cannot be described by a simple sum of the dynamic viscoelasticity of the PVA gel with the same permanent cross-link concentration and the PVA aqueous solution with the same borate ion concentration (CB = CBIN) as in the DC-PVA gel. Th

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22

Ma, Xiao Mei, Yan Hong Li, and Yan Zhi Xia. "Dually Responsive Multi-Network Hydrogel of N-Isopropylacrylamide Copolymeric Microgels Embedded in Poly(vinyl alcohol)." Advanced Materials Research 430-432 (January 2012): 154–57. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.154.

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To improve the performance of traditional hydrogels, dually responsive multi-network hydrogel was designed and fabricated in two steps. Firstly, temperature-and pH-responsive copolymeric microgel of N-isopropylacrylamide, methacrylic acid and polyethyleneglycol methacrylate were prepared via precipitation polymerization in poly (vinyl alcohol) (PVA) aqueous solution. Then glutaraldehyde was added to the microgel dispersion to build crosslinks among microgels and PVA, producing multi-network hydrogel with thermo-and pH-sensitivity. The morphology of the microgel and hydrogel was characterized b

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23

Sukhanova, T. V., A. A. Artyukhov, I. A. Prudchenko, et al. "Delta-sleep inducing peptide entrapment and release from polymer hydrogels based on modified polyvinyl alcohol." Biomeditsinskaya Khimiya 59, no. 1 (2013): 65–75. http://dx.doi.org/10.18097/pbmc20135901065.

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The aim of the study was to entrap delta-sleep inducing peptide (DSIP) in cross-linked poly(vinyl alcohol)-based hydrogels of different structures and to evaluate peptide release kinetics from these hydrogels using an in vitro model. Isotropic and macroporous hydrogels on the basis of poly(vinyl alcohol) acrylic derivative (Acr-PVA) as well as macroporous hydogels containing epoxy groups which were synthesized by copolymerization of this monomer with glycidyl methacrylate. The isotropic hydrogels were fabricated at positive temperatures while the macroporous hydrogels (cryogels) were prepared

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24

Rasool, Atta, Sadia Ata, Atif Islam, and Rafi Ullah Khan. "Fabrication of novel carrageenan based stimuli responsive injectable hydrogels for controlled release of cephradine." RSC Advances 9, no. 22 (2019): 12282–90. http://dx.doi.org/10.1039/c9ra02130b.

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25

Abdeen, Z., and Z. F. Akl. "Uranium(vi) adsorption from aqueous solutions using poly(vinyl alcohol)/carbon nanotube composites." RSC Advances 5, no. 91 (2015): 74220–29. http://dx.doi.org/10.1039/c5ra10264b.

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A series of PVA/MWCNTs hydrogels were synthesized and characterized. Incorruption of MWCNTs into PVA enhanced UO<sub>2</sub><sup>2+</sup> ions removal efficiency compared to the PVA only. UO<sub>2</sub><sup>2+</sup> adsorption process on PVA/MWCNTs hydrogels was exothermic and spontaneous.

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26

Zheng, Chunxiao, Yiying Yue, Lu Gan, Xinwu Xu, Changtong Mei, and Jingquan Han. "Highly Stretchable and Self-Healing Strain Sensors Based on Nanocellulose-Supported Graphene Dispersed in Electro-Conductive Hydrogels." Nanomaterials 9, no. 7 (2019): 937. http://dx.doi.org/10.3390/nano9070937.

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Intrinsic self-healing and highly stretchable electro-conductive hydrogels demonstrate wide-ranging utilization in intelligent electronic skin. Herein, we propose a new class of strain sensors prepared by cellulose nanofibers (CNFs) and graphene (GN) co-incorporated poly (vinyl alcohol)-borax (GN-CNF@PVA) hydrogel. The borax can reversibly and dynamically associate with poly (vinyl alcohol) (PVA) and GN-CNF nanocomplexes as a cross-linking agent, providing a tough and flexible network with the hydrogels. CNFs act as a bio-template and dispersant to support GN to create homogeneous GN-CNF aqueo

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27

Araki, Sadao, Yuko Shirakura, Harufumi Suzuki, and Hideki Yamamoto. "Synthesis of spherical porous cross-linked glutaraldehyde/poly(vinyl alcohol) hydrogels." Journal of Polymer Engineering 36, no. 9 (2016): 891–98. http://dx.doi.org/10.1515/polyeng-2015-0413.

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Abstract Spherical glutaraldehyde cross-linked poly(vinyl alcohol) (PVA) hydrogels (G-PVA) were prepared in three steps: gelatification, cross-linking, and removal of alginate. Gelatification was carried out by dropping a solution of alginate, PVA, and glutaraldehyde into a calcium chloride solution to form calcium alginate. Calcium alginate gels were prepared at 20°C, 40°C, 60°C, and 80°C to study the effect of gelatification temperature on the formation of pores on the surface of G-PVA. The effect of the alginate content was studied. PVA and glutaraldehyde were cross-linked by immersion of t

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28

Ding, Jianzi, Qian Li, Liwei Zhao, Xiaodi Li, Qinyan Yue, and Baoyu Gao. "A wheat straw cellulose based semi-IPN hydrogel reactor for metal nanoparticles preparation and catalytic reduction of 4-nitrophenol." RSC Advances 7, no. 29 (2017): 17599–611. http://dx.doi.org/10.1039/c7ra01077j.

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29

Zhang, Nai Yan, Jiang Yu, and Shou Jun Cai. "Synthesis and Properties of Thermo- and pH-Responsive PVA/P(DEA-co-MAA) Intelligent Semi-IPN Hydrogels." Advanced Materials Research 466-467 (February 2012): 229–33. http://dx.doi.org/10.4028/www.scientific.net/amr.466-467.229.

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A series of temperature- and pH-responsive poly(vinyl alcohol)/poly(N, N-diethylacrylamide-co-methacrylic acid) PVA/P(DEA-co-MAA) intelligent semi-IPN hydrogels were synthesized by free-radical copolymerization techniques and semi-interpenetrating polymer network techniques. The effects of the feed components, temperature and pH on the swelling behavior of the hydrogels were studied in detail. This unique property makes them very useful for biomedical applications such as on-off switches for modulated drug delivery and tissue engineering. With the increase of PVA content, the thermo- and pH-re

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Shi, Yan, Dang Sheng Xiong, and Jian Liang Li. "The Friction Properties of Polyvinyl Alcohol/Graphene Oxide Hydrogels as Cartilage Replacement." Key Engineering Materials 739 (June 2017): 152–56. http://dx.doi.org/10.4028/www.scientific.net/kem.739.152.

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In the present study, the poly (vinyl alcohol) (PVA)/graphene oxide (GO) hydrogels were synthesized by the repeated freeze-thaw method. The microstructure of PVA/GO hydrogels was characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, and scanning electron microscopy (SEM). The effects of GO content, lubrication condition, load and sliding speed on the friction properties of PVA/GO hydrogels were investigated. The results showed that the fracture morphology of PVA/GO hydrogels showed a layered-structure with uniformly dispersed GO sheets in PVA matrix. The fr

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31

Hu, Yang, Hai Lin, Lan Liu, and Wei Hua Dan. "Study of Physical Properties of Poly(vinyl alcohol) - Collagen Hydrogels Using a Response Surface Methodology." Advanced Materials Research 710 (June 2013): 60–66. http://dx.doi.org/10.4028/www.scientific.net/amr.710.60.

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A novel covalent bond cross-linked poly (vinyl alcohol) (PVA) collagen hydrogel was prepared and the physical properties were studied. The carboxyl groups were introduced into PVA through the reaction with chloroacetic acid. The EDC and NHS were used as cross-linker. The hydrogels were prepared by repeated freezing and thawing. For a better understanding of the influence of the parameters and their interaction, three factors were investigated by a response surface methodology. The physical properties of the hydrogels were analyzed. The results indicated that the response surface models could s

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32

Li, Wenxu, Duo Wang, Wen Yang, and Ying Song. "Compressive mechanical properties and microstructure of PVA–HA hydrogels for cartilage repair." RSC Advances 6, no. 24 (2016): 20166–72. http://dx.doi.org/10.1039/c6ra02166b.

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33

Cheng, Lin, Qin Zou, Li Kou Zou, Yan Luo, Li Qiang Kan, and Yu Bao Li. "Properties of Vanillin Modified Poly(vinyl Alcohol)/Gelatin Composite." Applied Mechanics and Materials 327 (June 2013): 48–52. http://dx.doi.org/10.4028/www.scientific.net/amm.327.48.

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To improve the cytocompatibility of super-hydrophilic poly (vinyl alcohol) (PVA) hydrogel, PVA/gelatin (PVA/Gel) composite was modified by vanillin (PVA/Gel/V) in this study. The properties of the composite gels were characterized by SEM, FTIR, DSC and contact angle instrument. The results show that PVA/Gel/V composite can compose a homogeneous system with the addition of vanillin, accompanying some destroy of the intra-hydrogen bonding of PVA crystal molecular chains and decrease of PVA super hydrophilicity. PVA/Gel/V composite exhibits better miscibility and hydrophobicity than pure PVA and

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34

Vlad-Bubulac, Tachita, Diana Serbezeanu, Ana-Maria Oprea, Ionela-Daniela Carja, Corneliu Hamciuc, and Maria Cazacu. "Preparation and characterization of new hydrogels based on poly(vinyl alcohol)/phosphoester — chondroitin sulphate." Open Chemistry 11, no. 3 (2013): 446–56. http://dx.doi.org/10.2478/s11532-012-0174-3.

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AbstractAbstract New polymer hydrogels based on partially phosphorylated poly(vinyl alcohol) (PVA/Phosphoester) have been prepared. Fourier transform infrared spectroscopy (FT-IR) was employed to confirm PVA/Phosphoester formation. Contact angle measurements were performed to evaluate the surface characteristics of the hydrogels. The PVA/Phosphoester hydrogels were co-networked with Chondroitin sulfate (CS) in various ratios by chemical crosslinking. The synthetic-natural mixed resulted semi-IPN hydrogels were structurally and morphologically investigated by ATR — FT-IR spectroscopy and scanni

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35

Hariyanti, Hariyanti, Erizal Erizal, M. Yasin Yunus, Indah Lestari, and Ditri Risska Rahmadhani. "RADIATION SYNTHESIS OF POLY(VINYL ALCOHOL) PVA–(POLYVINYL PYRROLIDONE) PVP FOR IMMOBILIZATION OF CAPTOPRIL." Jurnal Sains Materi Indonesia 21, no. 4 (2020): 143. http://dx.doi.org/10.17146/jsmi.2020.21.4.5943.

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RADIATION SYNTHESIS OF PVA POLY(VINYL ALCOHOL)–PVP (POLYVINYLPYRROLIDONE) for IMMOBILIZATION OF CAPTOPRIL. The aim of this work is to prepare Polyvinyl alcohol (PVA)- Polyvinylpyrrolidone (PVP) hydrogel with varying irradiation doses and drug dose to be used as a matrix for immobilization and control drug release of captopril. Immobilization and release of captopril in PVA-PVP hydrogel copolymer have been carried out. A mixture of PVA-PVP (6:4 w/w) solution containing captopril (10-20 mg), freeze-thawing, irradiated using gamma rays at various irradiation doses (0-20 kGy). The gel fraction and

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36

Muduli, Saradaprasan, Li-Hua Chen, Meng-Pei Li, et al. "Stem cell culture on polyvinyl alcohol hydrogels having different elasticity and immobilized with ECM-derived oligopeptides." Journal of Polymer Engineering 37, no. 7 (2017): 647–60. http://dx.doi.org/10.1515/polyeng-2016-0193.

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Abstract The physical characteristics of cell culture materials, such as their elasticity, affect stem cell fate with respect to cell proliferation and differentiation. We systematically investigated the morphologies and characteristics of several stem cell types, including human amniotic-derived stem cells, human hematopoietic stem cells, human induced pluripotent stem (iPS) cells, and embryonic stem (ES) cells on poly(vinyl alcohol) (PVA) hydrogels immobilized with and without extracellular matrix-derived oligopeptide. Human ES cells did not adhere well to soft PVA hydrogels immobilized with

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Hosseini, Motahare Sadat, Issa Amjadi, and Nooshin Haghighipour. "Preparation of Poly(vinyl alcohol)/Chitosan-Blended Hydrogels: Properties, In Vitro Studies and Kinetic Evaluation." Journal of Biomimetics, Biomaterials and Tissue Engineering 15 (October 2012): 63–72. http://dx.doi.org/10.4028/www.scientific.net/jbbte.15.63.

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Articular Cartilage Defects Are a Recent Critical Orthopaedic Issue. Hydrogels Have Been Widely Used in Soft Tissue Engineering Scaffolds as their Structures Are Similar to the Macromolecular-Based Components in the Human Body. Hydrogels Including those Based on Poly(vinyl Alcohol) (PVA) and Chitosan Are of Considerable Interest for Utilization in the Field of Tissue Engineering because of their Appropriate Biocompatibility. PVA Gels Can Be Formed by Chemical or Physical Crosslinking. the “freezing-Thawing” (FT) Process Is the Most Mild, Facile and Effective Method to Produce Physically Crossl

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Xu, Ming-Lu, Lu-Yao Guan, Sheng-Kai Li, Long Chen, and Zhuo Chen. "Stable gold graphitic nanocapsule doped hydrogels for efficient photothermal antibacterial applications." Chemical Communications 55, no. 37 (2019): 5359–62. http://dx.doi.org/10.1039/c9cc01933b.

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We have fabricated gold nanorod graphitic nanocapsule (AuNR@G) doped poly(vinyl alcohol) (PVA)/chitosan (CS) hydrogels, which possessed highly efficient and stable photothermal antibacterial properties under the irradiation of a near-infrared laser.

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Joo, Hyeonseo, Hoseong Han, and Sunghun Cho. "Fabrication of Poly(vinyl alcohol)-Polyaniline Nanofiber/Graphene Hydrogel for High-Performance Coin Cell Supercapacitor." Polymers 12, no. 4 (2020): 928. http://dx.doi.org/10.3390/polym12040928.

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Electroactive polymer hydrogel offers several advantages for electrical devices, including straightforward synthesis, high conductivity, excellent redox behavior, structural robustness, and outstanding mechanical properties. Here, we report an efficient strategy for generating polyvinyl alcohol–polyaniline–multilayer graphene hydrogels (PVA–PANI–MLG HDGs) with excellent scalability and significantly improved mechanical, electrical, and electrochemical properties; the hydrogels were then utilized in coin cell supercapacitors. Production can proceed through the simple formation of boronate (–O–B

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Esposito, Ludovico, Ana Isabel Barbosa, Tânia Moniz, et al. "Design and Characterization of Sodium Alginate and Poly(vinyl) Alcohol Hydrogels for Enhanced Skin Delivery of Quercetin." Pharmaceutics 12, no. 12 (2020): 1149. http://dx.doi.org/10.3390/pharmaceutics12121149.

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Nature has led to the discovery of biopolymers with noteworthy pharmaceutical applications. Blended biopolymers have demonstrated promising characteristics when compared with their individual counterparts. Sodium alginate (SA) is a marine polymer that has demonstrated the ability to form hydrogels, an interesting property for the development of cutaneous formulations. Predicting the good performance of blended biopolymers, a novel series of hybrid hydrogels based on SA and poly(vinyl) alcohol (PVA) were prepared. Quercetin, a natural polyphenolic flavonoid commonly found in fruits and vegetabl

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Liu, Tianqi, Xin Peng, Yuanyuan Chen, Jianan Zhang, Chen Jiao, and Huiliang Wang. "Solid-phase esterification between poly(vinyl alcohol) and malonic acid and its function in toughening hydrogels." Polymer Chemistry 11, no. 29 (2020): 4787–97. http://dx.doi.org/10.1039/d0py00023j.

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Solid-phase esterification reactions occur in the poly(vinyl alcohol)-malonic acid (PVA-MA) hydrogel by a simple drying treatment without using any catalyst under ambient conditions, which largely strengthen the hydrogel.

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Baron, Raluca Ioana, Madalina Elena Culica, Gabriela Biliuta, et al. "Physical Hydrogels of Oxidized Polysaccharides and Poly(Vinyl Alcohol) for Wound Dressing Applications." Materials 12, no. 9 (2019): 1569. http://dx.doi.org/10.3390/ma12091569.

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Two natural polymers, i.e., cellulose and water soluble pullulan, have been selectively oxidized employing the TEMPO-mediated protocol, to allow the introduction of C6-OOH groups. Thereafter, the composite hydrogels of poly(vinyl alcohol) (PVA) and different content of the oxidized polysaccharides were prepared by the freezing/thawing method. The Fourier transform infrared spectroscopy (FTIR) has been used to discuss the degree of interaction between the hydrogels constituents into the physical network. The homogeneity of the prepared hydrogels as revealed by the SEM show an excellent distribu

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Nešović, Katarina, Ana Janković, Tamara Radetić, et al. "Poly(vinyl alcohol)/chitosan hydrogels with electrochemically synthesized silver nanoparticles for wound dressing applications." Journal of Electrochemical Science and Engineering 10, no. 2 (2020): 185–98. http://dx.doi.org/10.5599/jese.732.

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Polymer-based hydrogel materials are excellent candidates for new-generation wound dressings with improved properties, such as high sorption ability, good mechanical properties and low adhesiveness. Cross-linked hydrogel matrices also serve as excellent carriers for controlled release of antibacterial agents, such as silver nanoparticles (AgNPs), which are preferred over conventional antibiotics due to low propensity to induce bacterial resistance. In this work, we aim to produce novel silver/poly(vinyl alcohol)/chitosan (Ag/PVA/CHI) hydrogels for wound dressing applications. The electroche

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Aramwit, Pornanong, Amorpun Sereemaspun, and Rungnapha Yamdech. "Sericin Ameliorates the Properties of Poly(Vinyl Alcohol) Hydrogel Prepared by Simple Repeated Freeze-Thaw Process without the Use of Chemical Crosslinking." International Journal of Research in Science 4, no. 3 (2018): 6. http://dx.doi.org/10.24178/ijrs.2018.4.3.06.

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Hydrogel of polyvinyl alcohol (PVA) and sericin can be easily produced using a repeated freeze-thaw process. The effects of polymer concentration (4-8 %wt), blending ratio of PVA/sericin (100/0-50/50), and the number of freeze-thawing cycle (4, 8, and 12 cycles) on chemical and physical properties of the hydrogels obtained were studied. We here showed that higher polymer concentration, higher PVA ratio, and more cycles of freeze-thawing produced the hydrogels with high gel (crosslinked) fraction (>90), wall-like structure, and high compressive modulus (100-170 kPa). When the sericin ratio w

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Zhu, Wei, Jin Gao, Xiao Gang Li, Jun Li Lin, Han Hui Cao, and Bai Tian Sun. "Mechanical Characteristics of PVA/STMP Hydrogel in Tensile and Unconfined Compression." Applied Mechanics and Materials 157-158 (February 2012): 1372–75. http://dx.doi.org/10.4028/www.scientific.net/amm.157-158.1372.

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Hydrogels based on Poly(vinyl alcohol) (PVA) were synthesized using the combining method of chemical agent and freezing-thawing cycle. Sodium Trimetaphosphate (STMP) is a kind of crosslinking agent in this reaction. The resulting hydrogels were characterized in terms of tensile properties and compression stress-strain testing. The influences of STMP and water content on mechanical properties of hydrogels were investigated. It is suggested that PVA hydrogel has excellent tensile strength, higher elongation at break and viscoelastic materials’ stress-strain curve. Tensile strength of specimens w

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Setayeshmehr, Mohsen, Shahzad Hafeez, Clemens van Blitterswijk, Lorenzo Moroni, Carlos Mota, and Matthew B. Baker. "Bioprinting Via a Dual-Gel Bioink Based on Poly(Vinyl Alcohol) and Solubilized Extracellular Matrix towards Cartilage Engineering." International Journal of Molecular Sciences 22, no. 8 (2021): 3901. http://dx.doi.org/10.3390/ijms22083901.

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Various hydrogel systems have been developed as biomaterial inks for bioprinting, including natural and synthetic polymers. However, the available biomaterial inks, which allow printability, cell viability, and user-defined customization, remains limited. Incorporation of biological extracellular matrix materials into tunable synthetic polymers can merge the benefits of both systems towards versatile materials for biofabrication. The aim of this study was to develop novel, cell compatible dual-component biomaterial inks and bioinks based on poly(vinyl alcohol) (PVA) and solubilized decellulari

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Vo, Dang, and Chen. "Synthesis of Intelligent pH Indicative Films from Chitosan/Poly(vinyl alcohol)/Anthocyanin Extracted from Red Cabbage." Polymers 11, no. 7 (2019): 1088. http://dx.doi.org/10.3390/polym11071088.

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In this study, pH indicative films were successfully synthesized from hydrogels made by blending 1% poly(vinyl alcohol) (PVA) and 1% chitosan (CS) with anthocyanin (ATH) and sodium tripolyphosphate (STPP). Particularly, ATH extracted from red cabbage was used as the pH indicator, while STPP was utilized as the cross-linking agent to provide better mechanical properties of the cast films. FT-IR spectra confirmed the existence of the ATH in the cast films. Moreover, the tensile strength, the elongation-at-break, and the swelling indices of the cast films were measured. In general, these properti

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UTTAYARAT, Pimpon, Rattanakorn CHIANGNOON, Jarurattana EAMSIRI, and Wongwit SENAWONGSE. "Processing and Characterization of Antibacterial Hydrogel Sheet Dressings Composed of Poly(vinyl alcohol) and Silk Fibroin for Wound Healing Application." Walailak Journal of Science and Technology (WJST) 16, no. 5 (2018): 349–59. http://dx.doi.org/10.48048/wjst.2019.6292.

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Hydrogels are soft materials that contain high water content within their 3-dimensional structure. Such extremely hydrated environment allows hydrogels to recapitulate the structure of many native tissues inside the body. In biomedical application, hydrogels have been extensively used as biocompatible materials, drug delivery systems, and tissue-engineered scaffolds that can be designed to possess either permanent or slow-degradation properties. In this research, we applied gamma irradiation to develop transparent and conformal hydrogel sheets with sufficient mechanical strength from poly(viny

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Aparicio-Collado, José Luis, Juan José Novoa, José Molina-Mateo, Constantino Torregrosa-Cabanilles, Ángel Serrano-Aroca, and Roser Sabater i Serra. "Novel Semi-Interpenetrated Polymer Networks of Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate)/Poly (Vinyl Alcohol) with Incorporated Conductive Polypyrrole Nanoparticles." Polymers 13, no. 1 (2020): 57. http://dx.doi.org/10.3390/polym13010057.

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This paper reports the preparation and characterization of semi-interpenetrating polymer networks (semi-IPN) of poly(3-hydroxybutirate-co-3-hydroxyvalerate), PHBV, and poly (vinyl alcohol), PVA, with conductive polypirrole (PPy) nanoparticles. Stable hybrid semi-IPN (PHBV/PVA 30/70 ratio) hydrogels were produced by solvent casting, dissolving each polymer in chloroform and 1-methyl-2-pyrrolidone respectively, and subsequent glutaraldehyde crosslinking of the PVA chains. The microstructure and physical properties of this novel polymeric system were analysed, including thermal behaviour and degr

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Mansur, Herman S., Alexandra A. P. Mansur, and R. L. Oréfice. "Protein Immobilization in PVA Hydrogel: A Synchrotron SAXS and FTIR Study." Solid State Phenomena 121-123 (March 2007): 1355–58. http://dx.doi.org/10.4028/www.scientific.net/ssp.121-123.1355.

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In the present work, we aimed to investigate the immobilization of Bovine Serum Albumin (BSA) into poly (vinyl alcohol) (PVA) network. PVA hydrogels with BSA were characterized by Synchrotron SAXS radiation associated with Fourier Transform Infrared Spectroscopy (FTIR). We synthesized hydrogels by dissolving PVA in aqueous solution (5.0 wt%) and crosslinked with glutaraldehyde (GA). PVA and PVA/GA hydrogels samples were immersed in BSA aqueous solution for protein immobilization. FTIR spectra showed major vibration bands associated with PVA and GA chemical groups, and BSA protein amides. Regar

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