论文部分内容阅读
采用无皂乳液聚合法合成了聚(苯乙烯-co-甲基丙烯酰氧乙基三甲基氯化铵)(poly(St-co-DMC))纳米粒子,平均粒径约为100 nm.以此纳米粒子为模板,在接近室温及p H为中性的温和条件下,以四甲氧基硅烷(TMOS)为硅源,合成了poly(St-co-DMC)/Si O2杂化纳米粒子,TEM结果显示该纳米粒子具有明显的核壳结构,Si O2主要沉积在壳层.进一步通过四氢呋喃溶解制备得到具有空心结构的纳米粒子,这种空心结构纳米粒子的FTIR图谱中既有Si O2的信号,也有poly(St-co-DMC)的信号,说明空心纳米粒子的壳层不完全是Si O2,对空心纳米粒子的TGA结果分析计算得到Si O2的含量仅为69.7%,说明纳米粒子的壳层为杂化壳层,并且,这种壳层的厚度随着反应温度的升高、反应时间的延长、TMOS用量的增加及聚合物模板中DMC含量的增加而增大.
Poly (St-co-DMC) poly (styrene-co-methacryloyloxyethyltrimethylammonium chloride) nanoparticles were synthesized by soap-free emulsion polymerization with average particle size of about 100 nm. Using this nanoparticle as a template, poly (St-co-DMC) / Si O2 hybrid nanowires were synthesized with tetramethoxysilane (TMOS) as a silicon source under mild conditions close to room temperature and p H neutral The results of TEM and TEM show that the nanoparticle has a core-shell structure and Si O2 is mainly deposited on the shell. The nanoparticles with hollow structure were prepared by the dissolution of tetrahydrofuran. The FTIR spectra of the hollow structure nanoparticles include Si 2 O 2 Signal of poly (St-co-DMC), indicating that the shell of the hollow nanoparticles is not completely Si O2, TGA analysis of the hollow nanoparticles calculated Si O2 content of only 69.7%, indicating that the nanoparticles Shell is a hybrid shell, and the shell thickness increases with increasing reaction temperature, reaction time, increasing the amount of TMOS and increasing DMC content in the polymer template.