Log in

Relevant bibliographies by topics / Quaternary ammonium polymers / Journal articles

To see the other types of publications on this topic, follow the link: Quaternary ammonium polymers.

Journal articles on the topic 'Quaternary ammonium polymers'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Quaternary ammonium polymers.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Domb, Abraham J., Nurit Beyth, and Shady Farah. "QUATERNARY AMMONIUM ANTIMICROBIAL POLYMERS." MRS Proceedings 1569 (2013): 97–107. http://dx.doi.org/10.1557/opl.2013.907.

Full text

Abstract:

ABSTRACTPolymers possessing antimicrobial activity have been used for self sterilization surfaces as well as agents for treating contaminated water. Cationic polymers based on quaternary ammonium or guanidine groups have shown high inherent antimicrobial activity where the activity is related to the disruption of the microorganism cell wall. A range of antimicrobial nanoparticles possessing active quaternary ammonium groups with one of the alkyl is a an octyl chain have been synthesized. These nanoparticles were incorporated in dental restoration compositions to form self sterile composites. Quaternary ammonium polyethyleneimine nanoparticles with N-octyl dimethyl residues, demonstrated high antibacterial effect.

APA, Harvard, Vancouver, ISO, and other styles

2

Lee, Seunghyun, Hyejin Lee, Tae-Hyun Yang, Byungchan Bae, Nguyen Anh Thu Tran, Younghyun Cho, Namgee Jung, and Dongwon Shin. "Quaternary Ammonium-Bearing Perfluorinated Polymers for Anion Exchange Membrane Applications." Membranes 10, no. 11 (October 26, 2020): 306. http://dx.doi.org/10.3390/membranes10110306.

Full text

Abstract:

Perfluorinated polymers are widely used in polymer electrolyte membranes because of their excellent ion conductivity, which are attributed to the well-defined morphologies resulting from their extremely hydrophobic main-chains and flexible hydrophilic side-chains. Perfluorinated polymers containing quaternary ammonium groups were prepared from Nafion- and Aquivion-based sulfonyl fluoride precursors by the Menshutkin reaction to give anion exchange membranes. Perfluorinated polymers tend to exhibit poor solubility in organic solvents; however, clear polymer dispersions and transparent membranes were successfully prepared using N-methyl-2-pyrrolidone at high temperatures and pressures. Both perfluorinated polymer-based membranes exhibited distinct hydrophilic-hydrophobic phase-separated morphologies, resulting in high ion conductivity despite their low ion exchange capacities and limited water uptake properties. Moreover, it was found that the capacitive deionization performances and stabilities of the perfluorinated polymer membranes were superior to those of the commercial Fumatech membrane.

APA, Harvard, Vancouver, ISO, and other styles

3

Itsuno, Shinichi, Miyuki Takahashi, Yukihiro Arakawa, and Naoki Haraguchi. "Synthesis of polymers containing chiral 1,2-diamine derivatives and their application to asymmetric reactions." Pure and Applied Chemistry 79, no. 9 (January 1, 2007): 1471–79. http://dx.doi.org/10.1351/pac200779091471.

Full text

Abstract:

Polymer-supported chiral 1,2-diamine derivatives have been prepared. The polymers containing free 1,2-diamine moiety were applied to enantioselective hydrogenation catalyst by combination with RuCl2-BINAP complex. Asymmetric hydrogenation of aromatic ketones was performed by means of the polymeric catalyst derived from these polymers to give the chiral secondary alcohols with high ee in quantitative conversion. The polymers containing 1,2-diamine monosulfonamide were applied to enantioselective transfer hydrogenation catalyst by combination with RuCl2-p-cymene complex. Asymmetric transfer hydrogenation of aromatic ketones was performed by means of the polymeric catalyst to afford the chiral secondary alcohols. A high level of enantioselectivities up to 99 % ee was attained in neat water by using the polymeric catalyst prepared from quaternary ammonium salt-type polymer support.

APA, Harvard, Vancouver, ISO, and other styles

4

Wang, Li-Fei, Xing-Gui Liu, Mei-Mei Meng, Yong-Kai Xu, Rui Zhu, Rui Zhang, Zhen-Zhong Lu, and Wei Huang. "Three coordination polymers built by quaternary-ammonium-modified isophthalic acid." Acta Crystallographica Section C Structural Chemistry 77, no. 5 (April 9, 2021): 221–26. http://dx.doi.org/10.1107/s2053229621003296.

Full text

Abstract:

Three coordination polymers based on quaternary-ammonium-modified isophthalic acid, namely, catena-poly[[[aqua-μ2-bromido-di-μ3-hydroxido-methanoldinitratotetracopper(II)]-bis{μ4-5-[2-(tripropylazaniumyl)ethoxy]benzene-1,3-dicarboxylato}] nitrate], {[Cu4Br(C19H28NO5)2(NO3)2(OH)2(CH4O)(H2O)]NO3} n , 1, poly[μ3-bromido-μ2-bromido-bromido-μ3-hydroxido-{μ4-5-[2-(tripropylazaniumyl)ethoxy]benzene-1,3-dicarboxylato}tricopper(II)], [Cu3Br3(C19H28NO5)(OH)] n , 2, and poly[bromido{μ3-5-[2-(tripropylazaniumyl)ethoxy]benzene-1,3-dicarboxylato}zinc(II)], [ZnBr(C19H28NO5)] n , 3, were obtained by solvothermal reactions. Coordination polymer (CP) 1 contains tetranuclear Cu4 units, in which the four Cu atoms are linked by two μ3-OH− groups into a Cu4(OH)2 cluster, which are in turn linked by 5-[2-(tripropylazaniumyl)ethoxy]benzene-1,3-dicarboxylate (cpa−) ligands into a chain structure. CP 2 also contains a tetranuclear Cu4(OH)2 cluster and these are linked with CuBr3 units into chains. The chains are then connected by cpa− ligands into a two-dimensional layered structure. CP 3 contains a two-dimensional layer structure built by binuclear Zn2 units and cpa− ligands. The Br− counter-anions of the quaternary ammonium groups all take part in the construction of the polymeric networks.

APA, Harvard, Vancouver, ISO, and other styles

5

Rassu, Giovanna, Silvia Fancello, Marta Roldo, Milo Malanga, Lajos Szente, Rossana Migheli, Elisabetta Gavini, and Paolo Giunchedi. "Investigation of Cytotoxicity and Cell Uptake of Cationic Beta-Cyclodextrins as Valid Tools in Nasal Delivery." Pharmaceutics 12, no. 7 (July 12, 2020): 658. http://dx.doi.org/10.3390/pharmaceutics12070658.

Full text

Abstract:

Cyclodextrin polymers have high applicability in pharmaceutical formulations due to better biocompatibility, solubility enhancement, loading capacity and controlled drug release than their parent, cyclodextrins. The cytotoxicity and cell uptake of new cationic beta-cyclodextrin monomers and polymers were evaluated as suitable materials for nasal formulations and their protective effects on cells exposed to hydrogen peroxide were studied. PC12 and CACO-2 cells were selected as the neuronal- and epithelial-type cells, respectively, to mimic the structure of respiratory and olfactory epithelia of the nasal cavity. All cationic beta-cyclodextrin polymers tested showed dose- and time-dependent toxicity; nevertheless, at 5 µM concentration and 60 min of exposure, the quaternary-ammonium-beta-cyclodextrin soluble polymer could be recognized as nontoxic. Based on these results, a fluorescently labelled quaternary-ammonium-beta-cyclodextrin monomer and polymer were selected for uptake studies in CACO-2 cells. The monomeric and polymeric beta-cyclodextrins were internalized in the cytoplasm of CACO-2 cells; the cationic monomer showed higher permeability than the hydroxypropyl-beta-cyclodextrin, employed as comparison. Therefore, these cationic beta-cyclodextrins showed potential as excipients able to improve the nasal absorption of drugs. Furthermore, amino-beta-cyclodextrin and beta-cyclodextrin soluble polymers were able to reduce oxidative damage in PC12 and CACO-2 cells and thus could be studied as bioactive carriers or potential drugs for cell protection against oxidative stress.

APA, Harvard, Vancouver, ISO, and other styles

6

Kim, Dae-Hee, Min-Yeong Jung, Hyun Park, In-Won Lee, Ho-Hwan Chun, and Nam-Ju Jo. "Antifouling Paint Resin Based on Polyurethane Matrix with Quaternary Ammonium Salt." Polymer Korea 39, no. 1 (January 25, 2015): 122–29. http://dx.doi.org/10.7317/pk.2015.39.1.122.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Carpov, A., C. Luca, S. Drăgn, and I. Petrariu. "New Aspects of Polymers Containing Quaternary Ammonium Groups." Journal of Macromolecular Science: Part A - Chemistry 22, no. 5-7 (May 1985): 907–29. http://dx.doi.org/10.1080/00222338508056644.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Raja, Arsalan A., and Cafer T. Yavuz. "Charge induced formation of crystalline network polymers." RSC Adv. 4, no. 104 (2014): 59779–84. http://dx.doi.org/10.1039/c4ra10594j.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Ji, Weihang, Richard R. Koepsel, Hironobu Murata, Sawyer Zadan, Alan S. Campbell, and Alan J. Russell. "Bactericidal Specificity and Resistance Profile of Poly(Quaternary Ammonium) Polymers and Protein–Poly(Quaternary Ammonium) Conjugates." Biomacromolecules 18, no. 8 (July 14, 2017): 2583–93. http://dx.doi.org/10.1021/acs.biomac.7b00705.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Bonenfant, Danielle, François-René Bourgeois, Murielle Mimeault, Frédéric Monette, Patrick Niquette, and Robert Hausler. "Synthesis and structure-activity study of quaternary ammonium functionalized β-cyclodextrin-carboxymethylcellulose polymers." Water Science and Technology 63, no. 12 (June 1, 2011): 2827–32. http://dx.doi.org/10.2166/wst.2011.630.

Full text

Abstract:

Carboxymethylcellulose (CMC) and β-cyclodextrin (β-CD)-based polymers functionalized with two types of quaternary ammonium compounds (QACs), the alkaquat DMB-451 (N-alkyl (50% C14, 40% C12, 10% C10) dimethylbenzylammonium chloride) (DMD-451) named polymer DMB-451, and FMB 1210-8 (a blend of 32 w% N-alkyl (50% C14, 40% C12, 10% C10) dimethylbenzylammonium chloride and 48 w% of didecyldimethylammonium chloride) named polymer FMB 1210-8, were synthethized and characterized by Fourier transform infrared spectroscopy. The antimicrobial activities of these polymers against Eschericia coli were also evaluated at 25 °C in wastewater. The results have indicated that the polymer FMB 1210-8 possesses a high-affinity binding with bacterial cells that induces a rapid disinfection process. Moreover, in the same experimental conditions of disinfection (mixture of 1.0 g of polymer and 100 mL of wastewater), the polymer FMB 1210-8 has a higher antimicrobial efficiency (99.90%) than polymer DMB-451 (92.8%). This phenomenon might be associated to a stronger interaction with bacterial cells due to stronger binding affinity for E. coli cells and greater killing efficiency of the C10 alkyl chains QAC of polymer FMB 1210-8 to disrupt the bacterial cell membrane as compared to N-alkyl (50% C14, 40% C12, 10% C10) dimethylbenzylammonium chloride. Together, these results suggest that the polymer FMB 1210-8 could constitute a good disinfectant against Escherichia coli, which could be advantageously used in wastewater treatments due to the low toxicity of β-CD and CMC, and moderated toxicity of FMB 1210-8 to human and environment.

APA, Harvard, Vancouver, ISO, and other styles

11

Weng, Zhulin, Yaochen Zheng, Aijin Tang, and Chao Gao. "Synthesis, Dye Encapsulation, and Highly Efficient Colouring Application of Amphiphilic Hyperbranched Polymers." Australian Journal of Chemistry 67, no. 1 (2014): 103. http://dx.doi.org/10.1071/ch13353.

Full text

Abstract:

A novel kind of amphiphilic hyperbranched polymer (AHP), poly(2-(dimethylamino)ethyl methacrylate)-co-polystyrene (HPTAM-co-PS), was synthesized via the combination of reversible addition–fragmentation chain-transfer polymerization and self-condensing vinyl polymerization (RAFT-SCVP). HPTAM-co-PS was functionalized via the highly efficient Menschutkin click reaction, resulting in hyperbranched poly(propargyl quaternary ammonium methacrylate)-co-polystyrene (HPPrAM-co-PS) with a hydrophilic quaternary ammonium salt core and hydrophobic PS shell. The average numbers of dye molecules trapped by each molecule of HPPrAM-co-PS (24.2 kDa) were 24.1 for methyl orange (MO), 22.0 for fluorescein sodium (FS), 24.2 for rose bengal (RB), and 238.4 for Congo red (CR). The polymer–dye complexes show excellent colouring effects for both PS and poly(styrene-b-butadiene-b-styrene) (SBS) membranes; the colour of the membrane containing AHP is very stable and uniform. Our work opens an avenue for the design of efficient dye-colouring additives and for the application of hyperbranched polymers in the field of polymer colouring.

APA, Harvard, Vancouver, ISO, and other styles

12

Rocheleau, Marie-Josée, and William C. Purdy. "The application of quaternary ammonium ionic polymers to electroanalysis: Part 2. Voltammetric studies with quaternary ammonium functionalized polymer film-coated electrodes." Electroanalysis 3, no. 9 (November 1991): 935–39. http://dx.doi.org/10.1002/elan.1140030910.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Shmakova, N. S., I. A. Kirsh, and V. A. Romanova. "Influence of cationic surfactants on physical and mechanical properties of polymer compositions." Proceedings of the Voronezh State University of Engineering Technologies 82, no. 1 (May 15, 2020): 225–29. http://dx.doi.org/10.20914/2310-1202-2020-1-225-229.

Full text

Abstract:

When creating filled polymer composite materials, difficulties often arise due to poor compatibility of polymers with modifying additives. To solve such problems, surface-active substances (SAS) are successfully used in many industries, but they are practically not used in polymer processing. This is largely due to the insufficient assortment of surfactants produced that are suitable for introduction into polymers, especially film-forming ones. Anionic and nonionic surfactants are used in the synthesis and processing of elastomers, but they are not used in the production of film materials. As for the use of cationic surfactants, there are still no data at all. They differ from other types of surfactants in a variety of structures, in the number and relative positions of cationic centers and hydrophobic radicals, and also in antimicrobial properties. The prospects of using quaternary ammonium salts for the modification of packaging materials are shown. The expediency of using cationic surfactants for the modification of polymeric materials is proved. It is shown that the use of quaternary ammonium salts improves the physical and mechanical properties of films based on polyethylene and polypropylene. It is proved that cationic surfactants are technologically compatible with polyolefins, which allows the processing of polymer compositions by extrusion. Today, the most common polymers for food packaging are polyethylene and polypropylene. This is due to their low cost, safety in contact with food products, and suitability for processing into films of different thicknesses. More and more attention is being paid to the creation of packaging materials with antimicrobial properties. The imparting of such properties is achieved by introducing an antimicrobial additive into the polymer melt. It is most expedient to introduce additives directly into the melt of the polymer composition during processing, since, for example, during the extrusion process, polymer homogenization with the additive.

APA, Harvard, Vancouver, ISO, and other styles

14

Bakhshi, Hadi, and Seema Agarwal. "Dendrons as active clicking tool for generating non-leaching antibacterial materials." Polymer Chemistry 7, no. 33 (2016): 5322–30. http://dx.doi.org/10.1039/c6py01105e.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Gao, Wei, Zeng-chao Dang, Fu-sheng Liu, Sheng Wang, Duan-wei Zhang, and Meng-xi Yan. "Preparation of antistatic epoxy resin coatings based on double comb-like quaternary ammonium salt polymers." RSC Advances 10, no. 71 (2020): 43523–32. http://dx.doi.org/10.1039/d0ra07479a.

Full text

Abstract:

The antistatic epoxy resin coatings using double comb-like quaternary ammonium salt polymers as antistatic agents reach good antistatic property with lower addition amount because polymers can dissolve and nearly linearly arrange in the coatings.

APA, Harvard, Vancouver, ISO, and other styles

16

Shadmon, Hodaya, Arijit Basu, Lea H. Eckhard, Abraham J. Domb, and Nurit Beyth. "Synthesis, characterization and antibacterial activity of heterocyclic quaternary ammonium polymers." New Journal of Chemistry 42, no. 18 (2018): 15427–35. http://dx.doi.org/10.1039/c8nj03392g.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Rocheleau, Marie-Josée, and William C. Purdy. "The application of quaternary ammonium ionic polymers to electroanalysis: Part 1. quaternary ammonium ionic polymer membranes for solid-state, ion-selective electrodes." Electroanalysis 3, no. 9 (November 1991): 929–34. http://dx.doi.org/10.1002/elan.1140030909.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Guo, Jiangna, Jing Qin, Yongyuan Ren, Bin Wang, Hengqing Cui, Yingying Ding, Hailei Mao, and Feng Yan. "Antibacterial activity of cationic polymers: side-chain or main-chain type?" Polymer Chemistry 9, no. 37 (2018): 4611–16. http://dx.doi.org/10.1039/c8py00665b.

Full text

Abstract:

Imidazolium (Im), quaternary ammonium (Qa), and 1,4-diazabicyclo[2.2.2]octane-1,4-diium (DABCO-diium) cation-based small molecule cationic compounds and their corresponding side-chain/main-chain cationic polymers were synthesized.

APA, Harvard, Vancouver, ISO, and other styles

19

Tsunooka, Masahiro, Takayuki Yamamoto, Yusuke Kurokawa, Kanji Suyama, and Masamitsu Shirai. "Photocuring Systems Using Quaternary Ammonium Thiocyanates." Journal of Photopolymer Science and Technology 15, no. 1 (2002): 47–50. http://dx.doi.org/10.2494/photopolymer.15.47.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Kostag, Marc, Tim Liebert, Omar A. El Seoud, and Thomas Heinze. "Efficient Cellulose Solvent: Quaternary Ammonium Chlorides." Macromolecular Rapid Communications 34, no. 19 (September 9, 2013): 1580–84. http://dx.doi.org/10.1002/marc.201300497.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Liu, Ji Ping, Yan Hua Wu, Lei Liu, Yu Mei Xiao, Xiao Dong Ma, and Bin Fu. "Synthesis of a New Water-Soluble Conjugated Polymers Containing Thiazoline Moiety for Antibacterial Activity Bioassay." Advanced Materials Research 690-693 (May 2013): 1594–98. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.1594.

Full text

Abstract:

The water-soluble cationic polyfluorene derivatives PFP-N(Me)3+I- and PFP-T containing the thiazoline cycle on side chain was designed and synthesized. The preliminary bioassay was carried out for the thiazolines and polymers at different concentrations. The antibacterial activity of the polymers and thiazolines were determined with E.coli by growth inhibition assays. The results demonstrate that the polymer containing thiazoline cycle (PFP-T) has a higher inhibition ratio against E.coli than the thiazoline compound itself and the corresponding thiazoline quaternary ammonium.

APA, Harvard, Vancouver, ISO, and other styles

22

NAMPITCH, TARINEE, and RATHANAWAN MAGARAPHAN. "EFFECT OF COAGULATING SKIM NR PARTICLES AS NR–CLAY NANOCOMPOSITE: PROPERTIES AND STRUCTURE." Rubber Chemistry and Technology 84, no. 1 (March 1, 2011): 114–35. http://dx.doi.org/10.5254/1.3548736.

Full text

Abstract:

Abstract New materials of skim NR–clay nanocomposites were prepared by a coagulating method using several organoclays, i.e., dodecyl ammonium–montmorillonite, Cloisite 15A, Cloisite 20A, and Cloisite 25A, which were modified by dodecyl ammonium chloride, dimethyl dehydrogenated tallow quaternary ammonium chloride, dimethyl dehydrogenated tallow quaternary ammonium chloride, and dimethyl hydrogenated tallow 2 ethylhexyl quaternary ammonium methyl sulfate, respectively. X-ray diffraction revealed that the intercalated nanocomposites were formed depending on the type and content of organoclays, and the excellent dispersion of clay in rubber matrix could be confirmed by transmission electron microscopy micrographs. In addition, thermal stability of the coagulated skim rubber–organoclay nanocomposites was improved as shown by the thermogravimetric analysis. The mechanical properties and dynamic-mechanical thermal analysis revealed that hardness and storage modulus of nanocomposites were improved and the glass transition temperature of nanocomposites increased as compared with that of the pure skim NR. Thus, not only recovery of this significant fraction of the lost rubber material but also reinforced skim rubber particles were obtained by the use of a coagulating method using several organoclays.

APA, Harvard, Vancouver, ISO, and other styles

23

Ahamed, Parbhej, Md Aminul Haque, Mikiya Ishimoto, Md Masud Parvez, Naoki Haraguchi, and Shinichi Itsuno. "Synthesis of chiral quaternary ammonium polymers for asymmetric organocatalysis application." Tetrahedron 69, no. 19 (May 2013): 3978–83. http://dx.doi.org/10.1016/j.tet.2013.03.018.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Luca, Cornelia, Silvia Mihailescu, and Marcel Popa. "Polymers containing quaternary ammonium groups based on poly(N-vinylimidazole)." European Polymer Journal 38, no. 8 (August 2002): 1501–7. http://dx.doi.org/10.1016/s0014-3057(02)00042-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Ran, Jin, Cenfeng Fu, Liang Ding, Pengrui Cao, and Tongwen Xu. "Dual hydrophobic grafted chains facilitating quaternary ammonium aggregations of hydroxide conducting polymers: a theoretical and experimental investigation." Journal of Materials Chemistry A 6, no. 14 (2018): 5714–23. http://dx.doi.org/10.1039/c8ta00500a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Pérez, Jehú, Leandro Toledo, Cristian H. Campos, Jorge Yañez, Bernabé L. Rivas, and Bruno F. Urbano. "Arsenic sorption onto an aluminum oxyhydroxide-poly[(4-vinylbenzyl)trimethylammonium chloride] hybrid sorbent." RSC Advances 6, no. 34 (2016): 28379–87. http://dx.doi.org/10.1039/c6ra01230b.

Full text

Abstract:

In this work, interpenetrated hybrid polymers consisting of aluminum oxyhydroxide (AlOOH) and a quaternary ammonium reagent were synthesized, and their capabilities of arsenite and arsenate retention from aqueous solution were studied.

APA, Harvard, Vancouver, ISO, and other styles

27

Farah, Shady, Oren Aviv, Natalia Laout, Stanislav Ratner, Nurit Beyth, and Abraham J. Domb. "Antimicrobial silica particles loaded with quaternary ammonium polyethyleneimine network." Polymers for Advanced Technologies 25, no. 6 (February 7, 2014): 689–92. http://dx.doi.org/10.1002/pat.3260.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Tsou, Andy H., Ilan Duvdevani, and Pawan K. Agarwal. "Quaternary ammonium elastomeric ionomers by melt-state conversion." Polymer 45, no. 10 (May 2004): 3163–73. http://dx.doi.org/10.1016/j.polymer.2004.03.026.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Prasad, Bhim Bali, Shirley Easo, and Anil Kumar. "Quaternary Ammonium Polyelectrolytes: Thermal Behavior of Certain Systems." Polymer Journal 26, no. 3 (March 1994): 251–56. http://dx.doi.org/10.1295/polymj.26.251.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Parvulescu, Viorica, Adriana Popa, Gabriela Paun, Ramona Ene, Corneliu-Mircea Davidescu, and Gheorghe Ilia. "Effect of polymer support functionalization on enzyme immobilization and catalytic activity." Pure and Applied Chemistry 86, no. 11 (November 1, 2014): 1793–803. http://dx.doi.org/10.1515/pac-2014-0715.

Full text

Abstract:

Abstract Two enzymes, laccase and peroxidase, were immobilized on chloromethylated styrene-divinylbenzene copolymers supports functionalized with phosphonates ((RO)2PO) or mixed ammonium and phosphonium groups (N+R3Cl–, P+Ph3Cl–). Phosphonates groups and quaternary ammonium salts were grafted on the “gel-type” copolymer by Michaelis–Becker polymer analogue reaction. Mixed polymer-supported ammonium and phosphonium salts were obtained by transquaternization of the ammonium groups to phosphonium group. The degrees of functionalization for obtained polymers were relatively high ensuring a sufficient concentration of active centers per unit mass of the copolymer. The obtained materials were characterized by thermal analysis, FTIR spectroscopy and SEM microscopy. The effects of OR1 and R2 radicals from phosphonate and respectively ammonium groups, as well as those of glutaraldehyde utilization on the immobilization yield and the catalytic properties of the supported enzymes were indicated. The activity of enzymes increased after immobilization and high immobilization yield was obtained for all the samples. The higher interaction of enzymes with support was indicated for mixed ammonium and phosphonium functions. A higher catalytic activity was obtained for peroxidase in oxidation of phenol and laccase in oxidation of anisole. The low effect of glutaraldehyde on enzyme activity reveals the strong interaction of enzyme with the polymer support, respectively with the functional groups.

APA, Harvard, Vancouver, ISO, and other styles

31

Parvez, Md Masud, Naoki Haraguchi, and Shinichi Itsuno. "Molecular design of chiral quaternary ammonium polymers for asymmetric catalysis applications." Organic & Biomolecular Chemistry 10, no. 14 (2012): 2870. http://dx.doi.org/10.1039/c2ob06909a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Tiffner, Maximilian, Marleen Häring, David Díaz Díaz, and Mario Waser. "Cationic Polymers Bearing Quaternary Ammonium Groups-Catalyzed CO2 Fixation with Epoxides." Topics in Catalysis 61, no. 15-17 (May 31, 2018): 1545–50. http://dx.doi.org/10.1007/s11244-018-0996-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Belkhir, Kedafi, Monique Lacroix, Majid Jamshidian, Stéphane Salmieri, Corinne Jegat, and Mohamed Taha. "Evaluation of antibacterial activity of branched quaternary ammonium grafted green polymers." Food Packaging and Shelf Life 12 (June 2017): 28–41. http://dx.doi.org/10.1016/j.fpsl.2017.02.005.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Zarejousheghani, Mashaalah, Alaa Jaafar, Hendrik Wollmerstaedt, Parvaneh Rahimi, Helko Borsdorf, Stefan Zimmermann, and Yvonne Joseph. "Rational Design of Molecularly Imprinted Polymers Using Quaternary Ammonium Cations for Glyphosate Detection." Sensors 21, no. 1 (January 4, 2021): 296. http://dx.doi.org/10.3390/s21010296.

Full text

Abstract:

Molecularly imprinted polymers have emerged as cost-effective and rugged artificial selective sorbents for combination with different sensors. In this study, quaternary ammonium cations, as functional monomers, were systematically evaluated to design imprinted polymers for glyphosate as an important model compound for electrically charged and highly water-soluble chemical compounds. To this aim, a small pool of monomers were used including (3-acrylamidopropyl)trimethylammonium chloride, [2-(acryloyloxy)ethyl]trimethylammonium chloride, and diallyldimethylammonium chloride. The simultaneous interactions between three positively charged monomers and glyphosate were preliminary evaluated using statistical design of the experiment method. Afterwards, different polymers were synthesized at the gold surface of the quartz crystal microbalance sensor using optimized and not optimized glyphosate-monomers ratios. All synthesized polymers were characterized using atomic force microscopy, contact angle, Fourier-transform infrared, and X-ray photoelectron spectroscopy. Evaluated functional monomers showed promise as highly efficient functional monomers, when they are used together and at the optimized ratio, as predicted by the statistical method. Obtained results from the modified sensors were used to develop a simple model describing the binding characteristics at the surface of the different synthesized polymers. This model helps to develop new synthesis strategies for rational design of the highly selective imprinted polymers and to use as a sensing platform for water soluble and polar targets.

APA, Harvard, Vancouver, ISO, and other styles

35

Cavallaro, Alex, Peter Majewski, Mary Barton, and Krasimir Vasilev. "Substrate Independent Approach for Immobilisation of Quaternary Ammonium Compounds to Surfaces to Reduce Bio-Burden." Materials Science Forum 783-786 (May 2014): 1389–95. http://dx.doi.org/10.4028/www.scientific.net/msf.783-786.1389.

Full text

Abstract:

Bacterial contamination of biomedical devices is an ongoing problem. One method to alleviate such contamination is the introduction of surface compounds onto devices which can kill bacteria on contact. Polymers containing quaternary ammonium groups are known for their antimicrobial properties. Here we report a substrate-independent two-step method for the immobilisation of quaternary ammonium groups onto any type of surface. To achieve this glycidlytrimethylammonium chloride was covalently bound to plasma polymerised allylmine interlayer. Changes in the membrane permeability ofEscherichia coliwere observed by BacLight LIVE\DEAD staining. 30% ofE. coligrown on the treated surfaces showed high levels of membrane permeability within 4 hours. Importantly, there was no observable cytotoxic effect on human dermal fibroblasts.

APA, Harvard, Vancouver, ISO, and other styles

36

Lin, Thong-Yueh, Min-Hua Chen, and Tse-Chuan Chou. "Postpolymerization of quaternary ammonium acrylate polymer produced by electropolymerization." Journal of Applied Polymer Science 82, no. 5 (2001): 1071–76. http://dx.doi.org/10.1002/app.1941.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Pazhanisamy, P., Mohamed Ariff, and Q. Anwaruddin. "Synthesis and characterization of quaternary ammonium ionomers." Journal of Applied Polymer Science 98, no. 3 (2005): 1100–1105. http://dx.doi.org/10.1002/app.21692.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Liu, Ying, Kaikai Ma, Rong Li, Xuehong Ren, and T. S. Huang. "Antibacterial cotton treated with N-halamine and quaternary ammonium salt." Cellulose 20, no. 6 (September 17, 2013): 3123–30. http://dx.doi.org/10.1007/s10570-013-0056-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Abid, S. K., and D. C. Sherrington. "Quaternary ammonium derivatives of cholesterol: polymerization and vesicle formation." Polymer 33, no. 1 (January 1992): 175–80. http://dx.doi.org/10.1016/0032-3861(92)90580-p.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Zhang, Na, Chengji Zhao, Wenjia Ma, Shuang Wang, Baolong Wang, Gang Zhang, Xuefeng Li, and Hui Na. "Macromolecular covalently cross-linked quaternary ammonium poly(ether ether ketone) with polybenzimidazole for anhydrous high temperature proton exchange membranes." Polym. Chem. 5, no. 17 (2014): 4939–47. http://dx.doi.org/10.1039/c4py00234b.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Zhong, Weiqiang, Chenyun Dong, Runqi Liuyang, Qizhi Guo, Hong Zeng, Yaling Lin, and Anqiang Zhang. "Controllable synthesis and antimicrobial activities of acrylate polymers containing quaternary ammonium salts." Reactive and Functional Polymers 121 (December 2017): 110–18. http://dx.doi.org/10.1016/j.reactfunctpolym.2017.10.010.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Ranucci, Elisabetta, Paolo Ferruti, and Maria Grazia Neri. "Synthesis and Preliminary Evaluation as Antimicrobial Agents of New Quaternary Ammonium Polymers." Journal of Bioactive and Compatible Polymers 4, no. 4 (October 1989): 403–9. http://dx.doi.org/10.1177/088391158900400406.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Belkhir, Kedafi, Corinne Jegat, Frédéric Prochazka, and Mohamed Taha. "Quaternary ammonium-functionalized polymers in biodegradable matrices: Physicochemical properties, morphology, and biodegradability." Journal of Applied Polymer Science 134, no. 37 (May 30, 2017): 45261. http://dx.doi.org/10.1002/app.45261.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Zhu, Ming-Ming, Yu Fang, Yan-Chen Chen, Yu-Qing Lei, Li-Feng Fang, Bao-Ku Zhu, and Hideto Matsuyama. "Antifouling and antibacterial behavior of membranes containing quaternary ammonium and zwitterionic polymers." Journal of Colloid and Interface Science 584 (February 2021): 225–35. http://dx.doi.org/10.1016/j.jcis.2020.09.041.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Cedrati, Valeria, Aurora Pacini, Andrea Nitti, Antxon Martínez de Ilarduya, Sebastián Muñoz-Guerra, Amitav Sanyal, and Dario Pasini. "“Clickable” bacterial poly(γ-glutamic acid)." Polymer Chemistry 11, no. 35 (2020): 5582–89. http://dx.doi.org/10.1039/d0py00843e.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Kojuch, Luana Rodrigues, Keila Machado Medeiros, Dayanne Diniz de Souza Morais, Edcleide Maria Araújo, and Hélio de Lucena Lira. "Study of Nanocomposites of Polyamide 6.6/National Bentonite Clay." Materials Science Forum 727-728 (August 2012): 894–98. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.894.

Full text

Abstract:

Polymers nanocomposites are a class of materials where inorganic substances with nanometrics dimensions are modified and used as dispersed loads in polymers matrices. In this work, polyamide 6.6 was chosen because of its excellent chemical, mechanical and thermal properties. The bentonite clay was treated with quaternary ammonium salt (Cetremide®) to make it organophilic and to improve the interaction with the polymer matrix. It was verified by the Torque Rheometry that the system with salt presented a bigger torque in relation to the torque of the system with untreated clay and pure polyamide 6.6. The nanocomposites presented an exfoliated and partially exfoliated structure, as evidenced by XRD. By DSC, it was observed that the treated clay increases the decomposition temperature of the nanocomposite.

APA, Harvard, Vancouver, ISO, and other styles

47

Suyama, Kanji, Kazuhiro Fuke, Takayuki Yamamoto, Yusuke Kurokawa, Masahiro Tsunooka, and Masamitsu Shirai. "Photochemical formation of ammonium/thiolate complexes from quaternary ammonium thiocyanates and its use in crosslinking of polymers." Journal of Photochemistry and Photobiology A: Chemistry 179, no. 1-2 (April 2006): 87–94. http://dx.doi.org/10.1016/j.jphotochem.2005.07.019.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Iturri Ramos, Jagoba Jon, Irantzu Llarena, Luis Fernández, Sergio Enrique Moya, and Edwin Donath. "Controlled Stripping of Polyelectrolyte Multilayers by Quaternary Ammonium Surfactants." Macromolecular Rapid Communications 30, no. 20 (October 12, 2009): 1756–61. http://dx.doi.org/10.1002/marc.200900280.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Kang, Jun-Jie, Wei-Ying Li, Yuan Lin, Xue-Ping Li, Xu-Rui Xiao, and Shi-Bi Fang. "Synthesis and ionic conductivity of a polysiloxane containing quaternary ammonium groups." Polymers for Advanced Technologies 15, no. 12 (January 2004): 61–64. http://dx.doi.org/10.1002/pat.434.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Xu, William Z., Guangzheng Gao, and John F. Kadla. "Synthesis of antibacterial cellulose materials using a “clickable” quaternary ammonium compound." Cellulose 20, no. 3 (March 31, 2013): 1187–99. http://dx.doi.org/10.1007/s10570-013-9914-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!