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摘要
利用微波辐照技术,采用半连续种子乳液聚合法制备了具有明显核壳结构的聚硅氧烷/聚丙烯酸酯复合乳液。利用傅里叶变换红外光谱、粒度分析、透射电镜、热重分析等技术手段对产物进行系统化表征,研究了聚硅氧烷含量对乳液聚合和复合胶膜性能的影响。结果表明:复合乳胶粒的平均粒径均小于100nm,具有明显的核/壳结构;随着聚硅氧烷含量的增加,复合乳液中乳胶粒粒径增大,分布变窄,反应稳定性变差,但仍能制得核/壳型复合乳液。胶膜的力学性能变差,热稳定性无明显降低。胶膜吸水率降低,表面接触角逐渐增大。
Abstract
Emulsion polymerization assisted by microwave irradiation (MI) owns many advantages such as high yield and energy/time saving.By using MI technique,polysiloxane/polyacrylate(SI/PEA) based emulsoid particles with evident core-shell structure was prepared via semi-continuous seeded emulsion polymerization.Related physiochemical techniques including transmission electron microscopy,size distribution analyzer and thermogravimetric analysis were used to characterize the morphology and size distribution of the emulsoid particles,and the thermal stability of the resultant emulsoid film.It was concluded that,the emulsoid particles were made of SI cores coated by PEA shells,their average size was smaller than 100 nm.With increasing the amount of PEA,the mean size of the emulsoid particles increased,and its distribution narrowed.The water uptake of the prepared emulsoid film decreased,while its mechanical properties got declined.
关键词
微波辐照
/
核/壳结构
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硅丙乳液
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聚硅氧烷含量
Key words
microwave irradiation
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core-shell structure
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silicon-acrylate emulsion
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polysiloxane amount
核壳型聚硅氧烷/聚丙烯酸酯共聚物乳液的微波辐射制备与性能研究[J].
化工新型材料, 2022, 50(10): 149-153 DOI:10.19817/j.cnki.issn1006-3536.2022.10.029
[1] Zhang Y,Yuan L,Guan Q,et al.Developing self-healable and antibacterial polyacrylate coatings with high mechanical strength through crosslinking by multi-amine hyperbranched polysiloxane via dynamic vinylogous urethane[J].Journal of Materials Chemistry A,2017,5(32):16889-16897.
[2] Jiang W,Dai A,Zhou T,et al.Hybrid polysiloxane/polyacrylate/nano-SiO2 emulsion for waterborne polyurethane coatings[J].Polymer Testing,2019,80:106110-10117.
[3] Li W,Shen W,Yao W,et al.A novel acrylate-PDMS composite latex with controlled phase compatibility prepared by emulsion polymerization[J].Journal of Coatings Technology and Research,2017,14(6):1259-1269.
[4] Lin F,Song M,He Z,et al.Synthesis and structural characterization of methacrylicacid/octadecylacrylate-graft-poly(methylhydrosiloxane) by hydrosilylation[J].Journal of Applied Polymer Science,2008,107(6):3773-3780.
[5] Liu B,Zhang B,Cao S,et al.Preparation of the stable core-shell latex particles containing organic-siloxane in the shell[J].Progress in Organic Coatings,2008,61(1):21-27.
[6] Guo X,Ge S,Wang J,et al.Waterborne acrylic resin modified with glycidyl methacrylate (GMA):formula optimization and property analysis[J].Polymer,2018,143(1):155-163.
[7] Wu Y,Duan H,Yu Y,et al.Preparation and performance in paper coating of silicone-modified styrene-butyl acrylate copolymer latex[J].Journal of Applied Polymer Science,2001,79(2):333-336.
[8] Huang K,Liu Y,Wu D.Synthesis and characterization of polyacrylate modified by polysiloxane latexes and films[J].Progress in Organic Coatings,2014,77(11):1774-1779.
[9] Huang J,Wang F,Ma L,et al.Vinylsilane-rich silicone filled by polydimethylsiloxane encapsulated carbon black particles for dielectric elastomer actuator with enhanced out-of-plane actuations[J].Chemical Engineering Journal,2022,428:131354.
基金资助
国家自然科学基金(U1704149);河南省科技攻关项目(162102210058)
