聚氨丙基甲基倍半硅氧烷纳米球制备及性能研究

发布时间：2019-01-07 20:35

【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,通过水解缩合反应在水溶液中,制得聚氨丙基甲基倍半硅氧烷(PAMSQ)纳米球,研究了单体配合比、加料方式、NaOH及复合乳化剂用量等因素对PAMSQ乳液粒径的影响。用傅里叶红外光谱仪(FT-IR)和核磁共振波谱仪(1 H-NMR)对产物结构进行了表征;用纳米粒度表面电位分析仪、透射电子显微镜(TEM)和X射线衍射仪(XRD)分别对PAMSQ的平均粒径、微观形态和晶型进行了测定。结果表明,PAMSQ具有预期的结构;控制NaOH的浓度在4.5~20.0mmol/L,SDS和AEO-9的用量0.75%~0.95%(wt,质量分数),可制得一系列耐热性好、呈不定型结构、球形度规整、粒径30~150nm范围的PAMSQ纳米球。
[Abstract]:Methyl triethoxy silane (MTES) was used as precursor, 纬 -aminopropyl triethoxy silane (KH550) as modifier, sodium hydroxide (NaOH) as catalyst. Sodium dodecyl sulfonate / fatty alcohol polyoxyethylene ether (SDS/AEO-9) was used as a composite emulsifier to prepare polypropyl methyl semiclosiloxane (PAMSQ) nanospheres by hydrolysis and condensation reaction in aqueous solution. The effects of feeding mode, NaOH and the amount of composite emulsifier on the particle size of PAMSQ emulsion were investigated. The structure of the product was characterized by Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance spectroscopy (1 H-NMR). The average particle size, micromorphology and crystal type of PAMSQ were measured by means of nano-particle surface potential analyzer, transmission electron microscope (TEM) (TEM) and X-ray diffraction (XRD), respectively. The results show that PAMSQ has the expected structure. A series of PAMSQ nanospheres with good heat resistance, amorphous structure, sphericity and diameter 30~150nm range can be prepared by controlling the concentration of NaOH at 4.5g / L 20.0 mmol / L SDS and 0.75mol / L AEO-9 (0.95% by mass fraction of wt,).
【作者单位】：陕西科技大学轻化工助剂化学与技术教育部重点实验室;
【基金】：陕西省科技厅自然科学基础研究项目(2016JQ2031) 中国博士后基金面上项目(2014M562515XB) 陕西科技大学博士科研启动基金(BJ14-04)
【分类号】：TB383.1;TQ317

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