中文摘要：

以4，4-二苯基甲烷二异氰酸酯（MDI）为扩链剂、钛酸异丙酯（TIPT）为改性剂，通过双端羟基聚二甲基硅氧烷（PDMS—OH）与三甲氧基硼氧六环（TM（）B）的沉淀聚合制备冲击防护微凝胶。通过红外光谱、透射电镜对微凝胶进行表征。同时研究以微凝胶整理的3D织物抗冲击性能为主要性能指标，采用正交法优化实验设计，确定单体投料最佳比例为Ⅲ（Si）／m（B）=15：1，m（MDI）=2．00％，m（TIPT）=4．20％。研究结果表明，相对于文献报道的涨流型硅硼共聚体系，MDI的引入可通过提高聚合物分子量，显著改善整理后复合织物的抗冲击性能。同时微凝胶粒子的产生一方面降低合成及干燥温度，减少能耗；另一方面也可以大幅降低产物运动粘度，改善材料加工与应用性能。

英文摘要：

A novel anti-impact protective micro-gel was synthesized via precipitation polymerization, in which di- phenylmethane diisocyanate （MDI） was employed as chain extender. And the structure and morphology of mi- crogel were characterized via IR and TEM. Therefore, the microgels were dip-coated into 3D fabrics to prepare anti-impact protective fabrics. The optimum feed ratio of microgels （m（Si）/m（B）=15： 1,m（MDI）=2.00% m （TIPT）= 4. 20%） was determinated through an orthogonal design based on the mechanical performance of anti-impact protective fabrics. The investigation suggested that the anti-impact performance of anti-impact pro- tective fabrics, which were finished with microgels containing MDI, could be significantly improved in that the molecular weight of polymer was increased stemming from the introduction of MDI. Meanwhile, not only the low reaction and drying temperature could be realized, but also the viscosity of reaction mixture and final prod- uct could be sharply dropped after MDI was employed.