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Journal articles on the topic 'Polyurea Microcapsules'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

He, Yongjun, Jingyun Feng, Xin Yi, Furu Kang, and Jun Deng. "Study of polyamine species modulating the properties of polyurea microencapsulated wall materials." Journal of Physics: Conference Series 2961, no. 1 (2025): 012010. https://doi.org/10.1088/1742-6596/2961/1/012010.

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Abstract This study explored the impact of various polyamines on polyurea shell performance and identified optimal candidates for high-performance microcapsules. Isophorone diisocyanate (IPDI) was combined with six polyamines (EDA, DAB, HMD, PPD, DETA, and TETA) to synthesize crosslinked polyurea shells via solvent-assisted precipitation polymerization. The polyurea coatings were characterized using ultraviolet-visible spectrophotometry, SEM, FTIR, X-ray diffraction, and thermogravimetric analysis to assess polymerization, microstructure, composition, and crystallinity. Results showed that pol

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2

Ma, Yanxuan, Yingrui Zhang, Jiatong Liu, et al. "Preparation and Characterization of Ethylenediamine-Polyurea Microcapsule Epoxy Self-Healing Coating." Materials 13, no. 2 (2020): 326. http://dx.doi.org/10.3390/ma13020326.

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Polyurea microcapsules with Ethylenediamine (EDA) as the core material were synthesized. A set of characterization methods, including optical and scanning electron microscopy (OM and SEM), the Fourier transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA) were used to confirm the microcapsule morphology and chemical structures. The influence of emulsifier content and stirring rate on size and morphology of the microcapsules was investigated, and the self-healing performance of EDA-Polyurea microcapsule/epoxy coatings was evaluated by electrochemical impedance spectroscopy

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3

Takei, Takayuki, Masahiro Yoshida, Tomonori Nagayoshi, Yasuo Hatate, Kouichiro Shiomori, and Shiro Kiyoyama. "Preparation and Characterisation of Phase Change Material-Loaded Polyurea Microcapsules Several Hundred Micrometres in Diameter." Polymers and Polymer Composites 17, no. 6 (2009): 365–69. http://dx.doi.org/10.1177/096739110901700604.

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In the present study, we attempted to prepare phase-change material (PCM)-loaded polyurea microcapsules several hundred micrometres in diameter via oil-in-water emulsion polymerisation. An oil phase with two types of isocyanate monomers (2,4-toluene diisocyanate (TDI) and phenyl isocyanate (PI)) and tetradecane as PCM was dispersed in an aqueous phase with hexamethylene diamine (HMD). The polyurea shell of microcapsules was formed by reaction of the isocyanate monomers with the amine groups derived from HMD and hydrolysed isocyanate monomers. A suitably adjusted agitation rate made it possible

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4

Lai, Weidong, Xinzheng Li, Huiqing Liu, Lu Han, Yajun Zhao, and Xiaowei Li. "Interfacial Polycondensation Synthesis of Optically Sensitive Polyurea Microcapsule." Journal of Chemistry 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/597578.

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TMPTA prepolymer resin and photoinitiators of ITX/TPO had been encapsulated in core-shell structured microcapsules as optical responding ingredients based on interfacial polycondensation method, and polyurea structured microcapsule shell had been formed on the sheared O/W interface. The synthesized microcapsule had regular core-shell structure with the diameter of about 0.455 μm and shell thickness of about 40 nm. UV-visible absorption spectra indicated that the encapsulated ITX and TPO photoinitiators could efficiently absorb UV irradiation. Under exposure, the C=C bonds absorbance of the mic

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5

Zhu, Jin Hua, Qing Zhen Wen, Chao Yu, Xiong Wei, and Li Qing Zhou. "Preparation of Microencapsulated Phase Change Materials Using Surface Modification Method." Advanced Materials Research 902 (February 2014): 52–57. http://dx.doi.org/10.4028/www.scientific.net/amr.902.52.

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With the adoption of surface modification method, microencapsulated phase change materials (MEPCM) with polyurea as wall materials, paraffin as core materials were successfully prepared. This paper made a research on the effect dosage of modifier might have on the content of microcapsule core materials. Findings indicated that the content of microcapsule core materials was relatively high as the dosage of modifier being core material 10 wt%. It was preliminarily proved that polyurea had been coated on the surface of paraffin particles by adopting Fourier Transform Infrared Spectrum (FTIR) to f

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6

Aryanti, Nita, Richard Andrew Williams, and Qinchung Yuan. "Application of Square and Oblong Pore Shapes in Rotating Membrane Emulsification to Produce Novel Particulate Products." Reaktor 20, no. 1 (2020): 47–56. http://dx.doi.org/10.14710/reaktor.20.1.47-56.

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Rotating membrane emulsification (RMR) has been intensively developed and applied for producing emulsion as well as particulate products such as microcapsules. Polyurea microcapsules were generally prepared by interfacial polycondensation polymerisation with addition of modifier to produce more stable microcapsules. In this research, development of the RMR was applied for producing polymer particles stabilised by nanoparticle without any addition of surfactant or modifier. Two types of membrane pores, the square (Type-A) with hydraulic diameter (Dh) of 84 mm and oblong pores with an aspect rat

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7

Wang, Xianfeng, Chunhong Li, Meihui Wang, Tao Zhao, and Wenyao Li. "Bifunctional Microcapsules with n-Octadecane/Thyme Oil Core and Polyurea Shell for High-Efficiency Thermal Energy Storage and Antibiosis." Polymers 12, no. 10 (2020): 2226. http://dx.doi.org/10.3390/polym12102226.

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A new kind of bifunctional microcapsule containing a n-octadecane (OD) and thyme oil (TO) core based on polyurea shell designed for thermal energy storage and antibiosis was prepared successfully through interfacial polymerization. The scanning electron microscopic investigations reveal that the obtained composite microcapsules present the regular spherical morphology and the transmission electron microscopic observations confirm the clear core–shell structure. Morphological and chemical structure analyses prove the successful synthesis of bifunctional microcapsules. Thermogravimetric analysis

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8

Zhang, Yuhua, Xi Zhang, Yurong Yan, and Zhonghua Chen. "Microencapsulation of Photochromic Solution with Polyurea by Interfacial Polymerization." Polymers 13, no. 18 (2021): 3049. http://dx.doi.org/10.3390/polym13183049.

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Photochromic materials are interesting materials because of their color-changing property under UV light and visible light irradiation. However, they are vulnerable to many factors, such as pH oxygen, ion, solvent, etc. because of the unsaturated bonds existing on the photochromic molecular. Microencapsulation of the photochromic materials can separate them from the surroundings. Here, photochromic microcapsules using 3,3-Diphenyl-3H-naphtho[2,1-b] pyran (NP)/solution as core and polyurea as shell via interfacial polymerization were prepared, and bis(2,2,6,6-tetramethyl-4-piperidinyl)sebacate

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9

Li, Cunjun, Minghao Wang, Zhaoliang Liu, Yanqi Xu, Chunhui Zhou, and Linjiang Wang. "Kaolinite-armoured polyurea microcapsules fabricated on Pickering emulsion: controllable encapsulation and release performance of a lipophilic compound." Clay Minerals 56, no. 1 (2021): 46–54. http://dx.doi.org/10.1180/clm.2021.15.

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AbstractMicrocapsules are successfully used in various applications such as self-healing, drug delivery and military camouflage. The shells of the microcapsules based on the traditional surfactant-stabilized emulsion template method are often single organic materials. The surfactants generally have insufficient stability against demulsification during preparation of the microcapsules. In the present study, kaolinite was used as an emulsifier for stabilizing Pickering emulsions and subsequently as an enhancer for forming microcapsules. Kaolinite-armoured polyurea microcapsules were fabricated b

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10

Petersen, Brent B., and Patrick J. Shea. "Microencapsulated Alachlor and Its Behavior on Wheat (Triticum aestivum) Straw." Weed Science 37, no. 5 (1989): 719–23. http://dx.doi.org/10.1017/s0043174500072696.

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Scanning electron microscopy (SEM) was used to study alachlor microcapsule morphology and the effects of straw age and moisture on herbicide release. Microcapsule diameter in the formulation ranged from 2 to 15 μm. The polyurea encapsulating material was stable in water over time. Diffusion was suggested as the primary mode of alachlor release, with diffusion rate controlled by herbicide and salt concentration gradients between the microcapsule and the surrounding aqueous solution. Alachlor release was promoted by drying the microcapsules before addition to water. Microcapsule morphology was u

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11

Mu, Huaixuan, Yiqing Deng, Wangcai Zou, Xiandi Yang, and Qiang Zhao. "Dual Microcapsules Encapsulating Liquid Diamine and Isocyanate for Application in Self-Healing Coatings." Coatings 14, no. 4 (2024): 410. http://dx.doi.org/10.3390/coatings14040410.

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Dual microcapsule systems, especially those based on the polyurea matrix, have emerged as pivotal components driving innovation in self-healing materials, thanks to the intrinsic properties of polyurea, primarily diamine and diisocyanate, rendering it an optimal choice for enhancing self-healing coatings. However, the encapsulation of polyurea components is fraught with substantial technical hurdles. Addressing these challenges, a novel methodology has been devised, leveraging n-heptane as a solvent in the liquid diamine emulsion process to facilitate the synthesis of diamine microcapsules. Th

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12

Yang, Luxi, Linchuan Dai, Lu Ye, Rui Yang, and Yangcheng Lu. "Microfluidic Fabrication and Thermal Properties of Microencapsulated N-Hexadecane with a Hybrid Polymer Shell for Thermal Energy Storage." Materials 15, no. 10 (2022): 3708. http://dx.doi.org/10.3390/ma15103708.

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In this study, a strategy based on microfluidic method is developed toward a facile fabrication of phase change material microcapsules with uniform and controllable particle size as well as high encapsulation ratio and thermal stability. N-hexadecane, as a phase change material, was successfully encapsulated by a hybrid shell of poly (methyl methacrylate) and polyurea. The fabrication process includes the following three steps: (1) Formation of oil-in-water droplets with uniform micron size in the microfluidic chip; (2) formation of the first polyurea shell to encapsulate droplets by fast inte

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13

Christian, Ujvala P., and Shrikant J. Wagh. "Experimental Studies on n-Octane and Cyclohexane as Organic Solvent for Synthesis of Polyurea Microcapsules by Interfacial Polycondensation." Asian Journal of Engineering and Applied Technology 7, no. 2 (2018): 64–66. http://dx.doi.org/10.51983/ajeat-2018.7.2.1006.

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Interfacial polycondensation (IP) is one of the most important step polymerization technique used for synthesis of polyurea microcapsules. IP reaction between diamine and diisocyanate monomers which are soluble in aqueous phase and organic phase respectively is very fast therefore the overall process of polyurea synthesis via interfacial polycondensation, by and large, mass transfer controlled reaction. Selection of proper organic solvent is one of the important parameter for IP reactions. The objective of this experimental work was to study the effect of n-Octane and Cyclohexane as an organic

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14

Mai, Chau Ngoc, La Thi Thai Ha, and Nguyen Kieu Oanh. "Synthesis of polyurethane/polyurea microcapsules carrying diisocyanate in self‐healing epoxy coating." Vietnam Journal of Chemistry 60, no. 2 (2022): 257–65. http://dx.doi.org/10.1002/vjch.202100114.

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AbstractRecently, self‐healing coating has been emerged and become one of the most crucial and critical materials with an excellent potential to repair physical damage and prevent cracks from expansion as an anticorrosion element to lengthen the coating lifespan. The determining factor in self‐healing coating is that the microcapsules containing a self‐curing liquid, which quickly fills up the cracks when the coatings are cut. Microcapsule embracing isophorone diisocyanate (IPDI) as a strong self‐healing agent requiring no catalyst has been continuously innovated to be utilized in reality; how

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15

Siam, Reema, Abeer Ali, and Raed Abu-Reziq. "Magnetically Separable Chiral Poly(ionic liquid) Microcapsules Prepared Using Oil-in-Oil Emulsions." Polymers 16, no. 19 (2024): 2728. http://dx.doi.org/10.3390/polym16192728.

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This article presents a method for producing chiral ionic liquid-based polyurea microcapsules that can be magnetically separated. The method involves entrapping hydrophilic magnetic nanoparticles within chiral polyurea microspheres. The synthetic process for creating these magnetic polyurea particles involves oil-in-oil (o/o) nano-emulsification of an ionic liquid-modified magnetite nanoparticle (MNPs-IL) and an ionic liquid-based diamine monomer, which comprises a chiral bis(mandelato)borate anion, in a nonpolar organic solvent, toluene, and contains a suitable surfactant. This is followed by

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16

Mao, Wenting, Chrysoula Litina, and Abir Al-Tabbaa. "Development and Application of Novel Sodium Silicate Microcapsule-Based Self-Healing Oil Well Cement." Materials 13, no. 2 (2020): 456. http://dx.doi.org/10.3390/ma13020456.

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A majority of well integrity problems originate from cracks of oil well cement. To address the crack issues, bespoke sodium silicate microcapsules were used in this study for introducing autonomous crack healing ability to oil well cement under high-temperature service conditions at 80 °C. Two types of sodium silicate microcapsule, which differed in their polyurea shell properties, were first evaluated on their suitability for use under the high temperature of 80 °C in the wellbore. Both types of microcapsules showed good thermal stability and survivability during mixing. The microcapsules wit

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17

Ma, Yan Xuan, Ying Rui Zhang, Jia Tong Liu, Meng Yao Li, and Ya Qian Xu. "Self-Healing Epoxy Coating Modified by Double-Walled Microcapsules Based Polyurea for Metallic Protection." Key Engineering Materials 821 (September 2019): 313–20. http://dx.doi.org/10.4028/www.scientific.net/kem.821.313.

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The effectiveness of preploymer and 1,6-Hexamethylene diamine encapsulated by double-walled microcapsules based polyurea (PUA) was explored for healing the cracks generated in epoxy coatings. Double-walled microcapsules were systhesized by interfacial polymerization at the interface between the prepolymer droplets and the 1,6-Hexamethylene diamine droplets to form the polyurea shell. The effect of synthetic stirring speed on the morphology of the microcapsules was observed by scanning electronmicroscopy (SEM) and optical microscopy (OM). The chemical structure as well as the thermal properties

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18

Ramarao, Chandrashekar, Steven V. Ley, Stephen C. Smith, Ian M. Shirley, and Nathalie DeAlmeida. "Encapsulation of palladium in polyurea microcapsules." Chemical Communications, no. 10 (April 23, 2002): 1132–33. http://dx.doi.org/10.1039/b200674j.

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19

Hong, K., and S. Park. "Preparation of polyurea microcapsules containing ovalbumin." Materials Chemistry and Physics 64, no. 1 (2000): 20–24. http://dx.doi.org/10.1016/s0254-0584(99)00241-2.

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20

Risangud, Nuttapol, Thomas R. Congdon, Daniel J. Keddie, Paul Wilson, Kristian Kempe, and David M. Haddleton. "Polyurea microcapsules from isocyanatoethyl methacrylate copolymers." Journal of Polymer Science Part A: Polymer Chemistry 54, no. 17 (2016): 2698–705. http://dx.doi.org/10.1002/pola.28149.

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21

Paik, Seung Uk. "Environmentally Friendly Polyurea Microcapsules of Pesticides by PVA Mediated Interfacial Polymerization." Materials Science Forum 510-511 (March 2006): 678–81. http://dx.doi.org/10.4028/www.scientific.net/msf.510-511.678.

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Microcapsules containing agrochemical pesticides used to control insects have attracted considerable interest for the last three decades in the search for reducing intrinsic toxicities, overconsumption, and ecological problems that have been caused generally by conventional pesticides. Biodegradable polyurea microcapsules containing pesticides such as ethyl parathion, benlate, and daconyl were prepared by the interfacial polymerization of polyisocyanate monomers with polyamines. In the process of microencapsulation with various emulsifying agents under the condition of high to medium concentra

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22

Wang, Lei Lei, Zhi Wang, Bao Hua Zhang, and Ke Feng Xiao. "Study on Preparation of Abamectin Microcapsule with Interfacial Polymerization." Advanced Materials Research 634-638 (January 2013): 1090–94. http://dx.doi.org/10.4028/www.scientific.net/amr.634-638.1090.

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The abamectin was microencapsulated with interfacial polymerization. The bursa wall materials of Abamectin microcapsule used in the experiment was polyurea which was produced by Tolylene-2,4-diisocyanate (TDI) and hexamethylenetetramine. The stirring speed and the dosage of emulsifier were determined by preliminary experiments, and the technical conditions for abamectin microencapsulation were optimized by orthogonal experiment, meanwhile, the optimal proportion and dosage of bursa wall materials, solvent and dispersant were determined. Encapsulation efficiency was measured by UV spectrophotom

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23

Yu, Fuqiang, Ying Wang, Yan Zhao, Jingyu Chou, and Xiaowu Li. "Preparation of Polyurea Microcapsules by Interfacial Polymerization of Isocyanate and Chitosan Oligosaccharide." Materials 14, no. 13 (2021): 3753. http://dx.doi.org/10.3390/ma14133753.

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(2-((1-(4-chlorophenyl)-1H-pyrazol-3-yl)oxy)-N-(3,4-dichlorophenyl)-propanamide) is a new oil-soluble compound with good fungicidal activity against Rhizoctonia solani. Chitosan oligosaccharide (COS) is the depolymerization product of chitosan and can be developed into biological pesticides, growth regulators, and fertilizers due to its various bioactivities. COS is an oligomer of β- (1 → 4)-linked d –glucosamine and can be taken as a polyamine. In this study, microcapsules were prepared by interfacial polymerization of oil-soluble methylene diphenyl diisocyanate and water-soluble COS. The eff

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24

Wu, Gang, Jinliang An, Dawei Sun, Xiuzhi Tang, Yong Xiang, and Jinglei Yang. "Robust microcapsules with polyurea/silica hybrid shell for one-part self-healing anticorrosion coatings." J. Mater. Chem. A 2, no. 30 (2014): 11614–20. http://dx.doi.org/10.1039/c4ta01312c.

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25

Tang, Yi Da, Wen Heng Zheng, Zhong Hua Tang, and Ling Wang. "Preparation and Properties of Modified PolyGram Nano-Microencapsulated Phase Change Materials." Advanced Materials Research 160-162 (November 2010): 7–12. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.7.

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The nano-microencapsulated phase change materials were prepared ,with butyl stearate as core material, styrene-maleic anhydride copolymer (SMA) as dispersant and emulsifier, polyurea resin as shell material which was synthesized from monomer 2, 4- toluene diisocyanate (TDI) and diethylen etriamine (DETA),and was modified by glycerol, nanometer material(TiO2) as functional material. We have analyzed the compactness, stabilities, phase transition temperature, and bactericidal efficiency of microcapsules. The results show that the compactness properties and stabilities properties of the modified

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26

Nguyen, Le-Thu T., Xander K. D. Hillewaere, Roberto F. A. Teixeira, Otto van den Berg, and Filip E. Du Prez. "Efficient microencapsulation of a liquid isocyanate with in situ shell functionalization." Polymer Chemistry 6, no. 7 (2015): 1159–70. http://dx.doi.org/10.1039/c4py01448k.

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A one-pot, simple approach for the encapsulation of a liquid tri-isocyanate in polyurea microcapsules with in situ shell functionalization/modification using different types of hydrophobic agents is presented.

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27

Kothari, Jehan, and Jude O. Iroh. "Self-Healing Poly(urea formaldehyde) Microcapsules: Synthesis and Characterization." Polymers 15, no. 7 (2023): 1668. http://dx.doi.org/10.3390/polym15071668.

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Smart coatings and smart polymers have been garnering great interest in recent times due to their novel characteristics, such as being self-restoring, self-cleaning, and self-healing. However, most self-healing materials have a low glass transition temperature (Tg) and are inadequate for the repair of advanced composites. Because of their low Tg, the conventional self-healing materials plasticize and weaken the composites. In this study, moderate to high temperature self-healing microcapsules, capable of healing and thus stopping crack propagation, are prepared. The microcapsules were prepared

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28

Zhou, Jian, Weixing Xu, Ya-nan Wang, and Bi Shi. "Preparation of polyurea microcapsules containing phase change materials in a rotating packed bed." RSC Advances 7, no. 34 (2017): 21196–204. http://dx.doi.org/10.1039/c7ra01805c.

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Polyurea microcapsules containing a phase change material with a much shorter preparation time, good morphology, high actual core content and encapsulation efficiency were firstly synthesized through interfacial polymerization in a rotating packed bed.

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29

Chen, Wenyan, Shuen Liang, Yan Peng, Yixia Wang, and Tao Liu. "Preparation of STF-loaded micron scale polyurethane polyurea double layer microcapsules and study on the mechanical properties of composites." RSC Advances 13, no. 11 (2023): 7385–91. http://dx.doi.org/10.1039/d2ra08111c.

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A novel approach for the encapsulation of the shear thickening fluid in polyurethane polyurea double layer microcapsules has been described and it is applied in a composite material to improve the impact resistance.

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30

Alias, J., N. A. Johari, A. Zanurin, N. A. Alang, and M. Z. M. Zain. "Self-Healing Epoxy Coating with Microencapsulation of Linseed Oil for the Corrosion Protection of Magnesium (Mg)." Journal of Physics: Conference Series 2129, no. 1 (2021): 012008. http://dx.doi.org/10.1088/1742-6596/2129/1/012008.

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Abstract The ability to self-heal is an important feature for the long-term durability of protective coatings on metal alloys. Microcapsules in the self-healing coating allowed for automatic recovery of any damages or cracks, extending the life of the coating. In this study, self-healing microcapsules containing linseed oil as the core material and polyurea-formaldehyde (PUF) as the shell material were manufactured to epoxy resin matrix. Coatings were applied to a bare magnesium (Mg) substrate and scratched to test the self-healing ability. Optical and scanning electron microscopy (SEM) were u

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31

Ni, Peihong, Mingzu Zhang, and Nianxi Yan. "Extraction of hexavalent chromium ions with polyurea microcapsules." Journal of Membrane Science 89, no. 1-2 (1994): 1–8. http://dx.doi.org/10.1016/0376-7388(93)e0172-g.

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32

Polenz, Ingmar, Sujit S. Datta, and David A. Weitz. "Controlling the Morphology of Polyurea Microcapsules Using Microfluidics." Langmuir 30, no. 44 (2014): 13405–10. http://dx.doi.org/10.1021/la503234z.

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Hong, K., and S. Park. "Polyurea microcapsules with different structures: Preparation and properties." Journal of Applied Polymer Science 78, no. 4 (2000): 894–98. http://dx.doi.org/10.1002/1097-4628(20001024)78:4<894::aid-app240>3.0.co;2-9.

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34

Li, Jian, M. A. Jafar Mazumder, Harald D. H. Stöver, Adam P. Hitchcock, and Ian M. Shirley. "Polyurea microcapsules: Surface modification and capsule size control." Journal of Polymer Science Part A: Polymer Chemistry 49, no. 14 (2011): 3038–47. http://dx.doi.org/10.1002/pola.24740.

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35

Musyanovych, Anna, Christoph Grimmer, Ali Enis SADAK, et al. "Polymer Capsules with Volatile Organic Compounds as Reference Materials for Controlled Emission." ACS Applied Materials and Interfaces 16, no. 50 (2024): 69999−70009. https://doi.org/10.1021/acsami.4c12826.

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Encapsulation of volatile organic compounds (VOCs) that could evaporate at a defined rate is of immense interest for application in emission reference materials (ERMs). Polyurethane/polyurea microcapsules with various VOC active ingredients (limonene, pinene, and toluene) were successfully produced by interfacial polymerization with Shirasu porous glass membrane emulsification in a size range between 10 and 50 μm. The effect of surfactant, VOC, monomer(s) type, and ratio has a great effect on the formulation process and morphology of capsules. The type of VOC played a significant role in th

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36

Fan, Wu Kun, Wen Zhao, and Zhong Xiao Li. "Preparation of Oil Core/Polyelectrolyte Shell Microcapsules by a Coacervation Method." Materials Science Forum 675-677 (February 2011): 1109–12. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.1109.

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Microcapsules with triallylamine-containing core surrounded by polyelectrolyte shell of controlled thickness were prepared via layer-bylayer assembly technology. First, isocyanate end-capped polyurethane was synthesized through the reaction of isophorone diisocyanate and poly(1,4- butylene adipate). Then, polyurea microcapsules containing triallylamine were prepared by the interfacial polymerization with branched polyethylenimine (PEI) as the water-phase macro-monomer and the prepared isocyanate end-capped polyurethane as the oil-phase macromonomer. Finally, stable weak polyelectrolyte microca

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37

Rao, Jayprakash, Amar Nath Chandrani, Anil Powar, and Sudeshna Chandra. "Design and application of polyurea microcapsules containing herbicide (oxyfluorfen)." Designed Monomers and Polymers 23, no. 1 (2020): 155–63. http://dx.doi.org/10.1080/15685551.2020.1816344.

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38

Dispinar, Tugba, Catheline A. L. Colard, and Filip E. Du Prez. "Polyurea microcapsules with a photocleavable shell: UV-triggered release." Polym. Chem. 4, no. 3 (2013): 763–72. http://dx.doi.org/10.1039/c2py20735d.

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39

Hong, Ki-jeong, and Soo-min Park. "Preparation and characterization of polyurea microcapsules with different diamines." Materials Research Bulletin 34, no. 6 (1999): 963–69. http://dx.doi.org/10.1016/s0025-5408(99)00088-4.

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40

Polenz, Ingmar, David A. Weitz, and Jean-Christophe Baret. "Polyurea Microcapsules in Microfluidics: Surfactant Control of Soft Membranes." Langmuir 31, no. 3 (2015): 1127–34. http://dx.doi.org/10.1021/la5040189.

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41

Ji, Mei, Fanqiushi Yue, Yanping He, Lianzhu Yang, and Haoran Wang. "Preparation and performance assessment of high-strength polyurea microcapsules." Powder Technology 432 (January 2024): 119173. http://dx.doi.org/10.1016/j.powtec.2023.119173.

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42

La, Yuan, Zengchao Wang, Junlin Zhu, et al. "Preparation and Performance Optimization of a Two-Component Microcapsule Self-Healing Fluoro Silicone Rubber." Journal of Composites Science 9, no. 1 (2025): 20. https://doi.org/10.3390/jcs9010020.

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In recent years, transformer failures caused by the aging of bushing sealing materials have become increasingly common in power systems, posing significant risks to the safe and stable operation of transformers. Microencapsulated self-healing technology offers a promising solution by repairing microcracks and extending the service life of rubber sealing materials. This study developed polyurea-formaldehyde microcapsules encapsulating polydimethylsiloxane (PDMS) self-healing agents based on a Pt/PDMS curing system. A two-component microencapsulated self-healing system was further established fo

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Sun, Ze, Hui Chen, Xianglong Meng, et al. "Influence of Embedding Microcapsules on Tribological Properties of Alumina Ceramics Prepared by Gel Casting." Materials 18, no. 9 (2025): 2110. https://doi.org/10.3390/ma18092110.

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The continuous advancement of technology has led to escalating demands for superior tribological performance in industrial applications, necessitating the enhancement of ceramic materials’ frictional properties through innovative approaches. Solid-lubricant embedding is a widely employed lubrication strategy in metals. However, the challenge of machining holes on ceramic surfaces remains a significant barrier to applying this lubrication technique to ceramics. Gel casting, as a near-net-shaping process, offers several advantages, including uniform green body density, low organic content, and t

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Li, Xiaowei, Weidong Lai, Shuangshuang Meng, and Heiyang Yu. "Photoinitiator Influence on the Photo-crosslink Property in Polyurea Microcapsules." Journal of Photopolymer Science and Technology 22, no. 5 (2009): 603–8. http://dx.doi.org/10.2494/photopolymer.22.603.

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Li, Gang, Yaqing Feng, Pei Gao, and Xianggao Li. "Preparation of Mono-Dispersed Polyurea-Urea Formaldehyde Double Layered Microcapsules." Polymer Bulletin 60, no. 5 (2008): 725–31. http://dx.doi.org/10.1007/s00289-008-0894-x.

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Sun, Shaofeng, Yan Gao, Na Han, XingXiang Zhang, and Wei Li. "Reversible photochromic energy storage polyurea microcapsules via in-situ polymerization." Energy 219 (March 2021): 119630. http://dx.doi.org/10.1016/j.energy.2020.119630.

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Kobašlija, Muris, and D. Tyler McQuade. "Polyurea Microcapsules from Oil-in-Oil Emulsions via Interfacial Polymerization." Macromolecules 39, no. 19 (2006): 6371–75. http://dx.doi.org/10.1021/ma061455x.

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Shi, Tingjing, Pan Hu, and Jingtao Wang. "Preparation of Polyurea Microcapsules Containing Phase Change Materials Using Microfluidics." ChemistrySelect 5, no. 7 (2020): 2342–47. http://dx.doi.org/10.1002/slct.201904570.

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Jacquemond, Marlène, Nicolas Jeckelmann, Lahoussine Ouali, and Olivier P. Haefliger. "Perfume-containing polyurea microcapsules with undetectable levels of free isocyanates." Journal of Applied Polymer Science 114, no. 5 (2009): 3074–80. http://dx.doi.org/10.1002/app.30857.

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Lu, Xinrui, Xianfeng Wang, Dong Xue, and Tao Zhao. "Preparation and characterization of n-octadecane @ bio-based polyurea microcapsules." Sustainable Chemistry and Pharmacy 45 (June 2025): 102002. https://doi.org/10.1016/j.scp.2025.102002.

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