首页|紫外光固化接枝明胶改性可生物降解水性聚氨酯的性能研究

紫外光固化接枝明胶改性可生物降解水性聚氨酯的性能研究

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以聚己内酯二醇(PCL)为软段成分,丙烯酸羟乙基酯(HEA)为封端剂,制备了具有丙烯酸酯端基的水性聚氨酯(WPU)预聚体.将乙烯基三甲氧基硅烷(VTMS)与明胶水解缩合反应后得到的乙烯基接枝改性明胶(GH)通过共价键合的连接方式引入到 WPU分子骨架中.通过紫外光固化将GH 中的乙烯基和 WPU预聚体中的丙烯酸酯末端连接,制备了可生物降解的 WPU/GH 复合材料.对 WPU/GH 的热性能、热失重性能及生物降解性能、降解后结晶度的变化等进行了测试和分析.结果表明,共价键合能提高 WPU的成膜性能、耐水性和热稳定性.当GH 含量达到 10 wt.%时,WPU/GH 在 0.6%脂肪酶 PBS 溶液中的降解率达到68%,在土壤中的降解率达到 56%.
Properties of biodegradable waterborne polyurethane modified with UV-curable grafted gelatin
Waterborne polyurethane(WPU)prepolymers with acrylate end groups were prepared using polycaprolactone diol(PCL)as the soft segment component and hydroxyethyl acrylate(HEA)as the capping agent.Vinyl graft-modified gelatin(GH)obtained from the hydrolysis-condensation reaction of vinyltrimethoxysilane(VTMS)and gelatin was introduced into the molecular backbone of WPU by covalent bonding attachment.Biodegradable WPU/GH composites were prepared by joining the vinyl groups in GH to the acrylate ends in the WPU prepolymer by UV curing.The thermal properties,heat loss properties and biodegradation properties of WPU/GH,and the change of crystallinity after degradation were tested and analysed.The results showed that covalent bonding could improve the film-forming property,water resistance and thermal stability of WPU.When the GH content reaches 10 wt.%,the degradation rate of GH/WPU chemical hybrid material reaches 68%in 0.6%lipase PBS solution and 56%in soil.

waterborne polyurethanemodified gelatinUV curingcovalent bondingbiodegradability

吴广峰、宋欣、李迎春

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长春工业大学 化学工程学院,吉林 长春 130012

水性聚氨酯 生物降解性 改性明胶 紫外光固化 共价键合

吉林省科技发展计划

20220201108GX

2024

长春工业大学学报
长春工业大学

长春工业大学学报

影响因子:0.282
ISSN:1674-1374
年,卷(期):2024.45(1)
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