采用纤维素微纤气凝胶增强聚合物材料的方法,首先制备出乙烯基三甲氧基硅烷改性的纤维素微纤气凝胶(SA),然后将SA作为增强聚合物复合材料,主要介绍了两种复合方法,一是直接共混法制备聚甲基丙烯酸甲酯(PMMA)复合材料;二是原位聚合法制备出聚苯乙烯复合材料,通过软单体丙烯酸正丁酯(BA)来调节复合材料。通过扫描电子显微镜、傅里叶变换红外光谱、热失重分析和万能材料试验机等手段对复合材料的结构与性能进行表征。结果表明:两种方法制备的复合材料,与纯聚合物相比,热稳定性都有所提高。
The cellulose microfibrils were used to reinforce polymer composites.Cellulose microfibril aerogel (SA) was modified by vinyl-trimethoxysilicane (VTMO).SA aerogels were used as reinforcing polymer composite in two different ways.The first one was direct blending of SA aerogels with poly (methyl methacrylate)(PMMA).The second one was to prepare polystyrene composites by in-situ polymerization,adjusting the composites by soft monomer n-butyl acrylate (BA).The structure and property of composites were characterized by SEM,FT-IR,TGA and universal testing machine.The experimental results showed that the thermal stability of the composites prepared by the two methods was higher than that of pure polymer.
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