Surface modification of fine colloidal silica with copolymer silane-coupling agents composed of maleic anhydride
Surface modification of fine colloidal silica with copolymer silane-coupling agents composed of maleic anhydride
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DOI：
10.1007/s003960200012
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发表时间：
2002
影响因子：
2.4
通讯作者：
K. Yoshinaga;Y. Tani;Y. Tanaka
中科院分区：
文献类型：
--
作者：
K. Yoshinaga;Y. Tani;Y. Tanaka
研究了马来酸酐共聚硅烷在微细硅溶胶改性中的反应性。10和45 nm的胶体二氧化硅与三甲氧基硅烷封端的聚（马来酸酐-co-苯乙烯）[P（MA-ST）]和聚（MA-co-甲基丙烯酸甲酯）在四氢呋喃中的反应导致有效的表面改性而没有颗粒聚集。从使用低分子量的聚苯乙烯硅烷的反应导致部分聚集的结果来看，这表明具有吸附在二氧化硅上的马来酸酐部分的相对刚性的共聚物链之间的空间相互作用防止了反应中的聚集。P（MA-ST）改性SiO2的29 Si交叉极化魔角旋转NMR谱表明，聚合物硅烷通过与SiO2表面羟基直接反应和聚合反应结合到SiO2表面。
The reactivity of copolymer silane composed of maleic anhydride in the modification of fine colloidal silica was studied. The reaction of colloidal silica of 10 and 45-nm diameter with trimethoxysilyl-terminated poly(maleic anhydride-co-styrene) [P(MA-ST)] and poly(MA-co-methyl methacrylate) in tetrahydrofuran resulted in effective surface modification without particle aggregation. From the results that the reaction using the polystyrene silane of low molecular weight led to partial aggregation, it was suggested that the steric interaction between relatively rigid copolymer chains having a maleic anhydride moiety adsorbed on the silica prevented the aggregation in the reaction. The29Si cross-polarization magic-angle-spinning NMR spectra of P(MA-ST)-modified silica showed that the polymer silane was bound to the silica surface by the direct reaction with silica hydroxyl groups and via the polymerization.