聚氨丙基/甲基倍半硅氧烷纳米球的合成与表征

Synthesis and Characterization of Polyaminopropylmethylsilsesquioxane Nanospheres

摘要:

以甲基三乙氧基硅烷（MTES）为前驱体，γ-氨丙基三乙氧基硅烷(KH550)为改性剂，氢氧化钠（NaOH）为催化剂，十二烷基磺酸钠/脂肪醇聚氧乙烯醚（SDS/AEO-9）为复合乳化剂，在水体系中通过乳液聚合制得了不同粒径、单分散的聚氨丙基/甲基倍半硅氧烷（PAMSQ）纳米球。用傅里叶红外光谱仪（FT-IR）、光电子能谱仪（XPS）、热重分析仪（TGA）、动态激光光散射仪（DLS）、场发射扫描电镜（FESEM）及原子力显微镜（AFM）等对PAMSQ纳米球的结构、耐热稳定性、粒径分布和微观形貌进行研究。结果表明，PAMSQ具有预期结构。TGA证实PAMSQ具有良好的耐热稳定性。单分散、规则球形的PAMSQ纳米粒子的粒径随NaOH浓度的增加而增加，平均粒径在30~150 nm范围。

Abstract:

A series of monodispersed polyaminopropylmethylsilsesquioxane (PAMSQ) nanospheres were fabricated via emulsion polymerization of Methyl triethoxysilane (MTES) in aqueous solution and sodium hydroxyl was used as catalyst, γ-aminopropyl triethoxysilane (KH550) as a modifier, sodium dodecyl sulfonate/fatty alcohol-polyoxyethylene ether (SDS/AEO-9) as mixed emulsifiers. Structure, thermal stability, particl size distribution, microscopic morphology of PAMSQ were investigated by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), Thermogravimetric analyzer (TGA), Dynamic Light Scattering (DLS), Field emission scanning electron microscopy (FESEM) and Atomic force microscopy (AFM). Results indicate that a series of PAMSQ nanospheres with an average particle size of about 30~150 nm could be prepared while the doses of NaOH were controlled as 0.018~0.08 wt%. Meanwhile the average particle size of the monodispersely and regularly spherical PAMSQ increased with augment of the NaOH dose. PAMSQ possessed the favorable thermal stability.