中文摘要：

在对纳米SiO2表面接枝改性过程中,使用乳化剂代替小分子醇以减缓硅烷偶联剂KH-570的水解速率；使用改性纳米SiO2与丙烯酸酯单体进行原位聚合形成种子乳液,以硅烷偶联剂KH-570作为功能单体制得具有核/壳结构的热交联型丙烯酸酯复合乳液.采用透射电镜（TEM）研究了乳胶粒的微观形态；采用傅立叶红外光谱（FTIR）研究了纳米SiO2改性效果；借助差热-热重天平考察了乳液的耐热性.结果表明：在种子乳液聚合中,随着SDS含量的增加,乳液聚合稳定性增加.在壳层聚合过程中,随着改性纳米SiO2用量增加,涂膜硬度、耐热性提高；随着KH-570用量增加,涂膜耐热性、耐水性提高,使用氨基树脂作为交联剂能进一步提高涂膜硬度及耐温性.最佳工艺条件为：纳米SiO2和KH-570质量分别占单体总质量的8.3％、13.3％；乳化剂配比为m（CO-897）∶m（CO-436）=1∶2.5；核芯乳化剂质量占核芯单体总质量的5％；壳层乳化剂占壳层单体总质量的5％.

英文摘要：

In the Nano-SiO2 surface modification process,emulsifier was used as substitute for alcohol in order to slow down the reaction rate of hydrolysis of a silane coupling agent KH-570;seed emulsion was made of modified nano-SiO2 and acrylate monomers by the method of in-situ polymerization,then the thermal cross-linking acrylate emulsion was made by using KH-570 as the functional monomers with the method of core-shell emulsion polymerization.The effects of nano-SiO2 modification and its amount on emulsion,and the heat resistance of the emulsion were characterized by the means of FTIR and TG.The results show that stability of the emulsion was improved with the increase of the content of SDS in the seed emulsion.In the emulsion polymerization process,with the increase in the amount of modified nano-SiO2 the hardness and heat resistance of film were improved; with the increase of the amount of KH-570,the heat resistance and water resistance of film were improved.The optimum performance of thermal cross-linking emulsion was obtained under the conditions：the amount of nano-SiO2 and KH-570 respectively accounts for 8.3％ and 13.3％ of the total amount of monomers; the mass ratio of CO-897 to CO-436 is 1 ∶ 2.5;the emulsifier of the nuclear layer accounts for 5％ of the total amount of monomers of the nuclear layer and the emulsifier of the shell accounts for 5％.