单分散反应性聚倍半硅氧烷纳米球的合成与性能

Synthesis and Property of Reactive and Monodispersed Polysilsesquioxane Nanospheres

以甲基三乙氧基硅烷(MTES)和γ-缩水甘油醚氧丙基三甲氧基硅烷(KH560)为硅源,氨水为催化剂,十二烷基磺酸钠/脂肪醇聚氧乙烯醚(SDS/AEO-3)为复合乳化剂,通过乳液聚合法合成了单分散反应性聚环氧基/甲基倍半硅氧烷纳米球杂化材料(PGMSQ NPs)。用红外光谱、硅谱和X射线光电子能谱对PGMSQ NPs的化学结构进行表征;用纳米粒度仪、场发射扫描电镜、原子力显微镜和热重分析仪等对PGMSQ NPs的平均粒径、微观形貌和耐热稳定性进行研究。结果表明,当n(KH560)/n(MTES)为0. 1~0. 2,油/水质量比为0. 03~0. 05时,制得的PGMSQ NPs平均粒径在100~150 nm之间,呈单分散规整球形。PGMSQ NPs具有良好的耐热稳定性。

Reactive polyglycidylmethylsilsesquioxane nanospheres hybrid materials （PGMSQ NPs） with monodispersed size distribution were manufactured via emulsion polymerization of methyl triethoxysilane （MTES） and 7-glycidoxy propyl trimethoxy silane （KH560） and ammonia solution was used as catalyst, sodium dodecyl sulfonate/fatty alcohol-polyoxyethylene ether （SDS/AEO-3） as mixed emulsifiers. Chemical structure of the PGMSQ NPs was confirmed by Fourier transform infrared spectroscopy （FT-IR）, silicon nuclear magnetic resonance （29Si-NMR）, X-ray photoelectron spectroscopy （XPS）. Dynamic light scattering （DLS）, field emission scanning electron microscopy （FESEM） and atomic force microscopy （AFM） were used to characterize the average particle size, microscopic morphology and thermal stability of PGMSQ NPs. Monodispersed PGMSQ NPs could be acquired with an average particle size of about 100-- 150 nm while the mole ratio of KH560 to MTES is 0.1-- 0.2 and the mass ratio of oil to water is 0.03--0.05. Furthermore, PGMSQNPs possess a favorable thermal stability.