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研究了3-氨丙基三乙氧基硅烷(APTES)和非离子表面活性剂十二烷基聚氧乙烯(C12EO4)水溶液的相行为、溶液自聚集作用和流变性,小角度X-射线散射(SAXS)、低温透射电子显微镜(cryo-TEM)和氘谱核磁共振(2H NMR)测定确定了溶液中聚集体结构,测定了聚集体混合物溶液的流变性质.结果表明:随着溶液混合物组分的变化,溶液聚集体结构发生了改变,在Lα相区内,恒定C12EO4浓度,随着APTES浓度增加聚集体结构由高曲率聚集体转变为低曲率的层状结构;而在恒定APTES浓度时,随着C12EO4增加,Lα相由低粘弹性的囊泡溶液转变为粘弹性极高的密堆积囊泡和平面层状结构共存的类凝胶相,溶液聚集体结构和结构转变是由于APTES水解产物插入至C12EO4胶束引起的.非离子表面活性剂和氨基硅烷混合物溶液相结构及结构转变的新结果对于完全理解该类混合物的实际应用,特别是作为模板合成硅材料的应用具有重要理论意义.
The phase behavior of 3-aminopropyltriethoxysilane (APTES) and non-ionic surfactant dodecyl polyoxyethylene (C12EO4) aqueous solution were investigated. The self-aggregation and rheology of the solution, the small angle X-ray scattering (SAXS), cryo-TEM (low temperature transmission electron microscopy) and nuclear magnetic resonance spectroscopy (2H NMR) were used to determine the aggregate structure in the solution and the rheological properties of the mixture solution were determined.The results showed that with the solution mixture In the Lα phase region, the concentration of C12EO4 was constant. With the increase of APTES concentration, the aggregate structure changed from high-curvature aggregates to low-curvature laminar structures. At constant APTES concentrations , The phase transition from low viscoelastic vesicle solution to the dense viscoelastic compact vesicles and the coexistence of planar lamellar structure with the increase of C12EO4. The structure and structure transition of solution aggregates are due to the hydrolysis of APTES Product insertion into C12EO4 micelles New Results of Solution Phase Structure and Structural Transformation of Nonionic Surfactants and Aminosilane Mixtures For a complete understanding of the practical applications of this class of mixtures and in particular as templates for the synthesis of silicon materials Application has important theoretical significance.