CAJ | 학술논문

成功实现了水相低温条件下稻壳纳米SiO2的表面改性。十六醇与纳米SiO2表面形成化学键合，十六醇的疏水性烷基链朝外排列改变了SiO2表面性质，由亲水表面变为疏水表面。表面改性操作在pH为8~10、90℃水溶液的条件下反应，120℃烘箱中干燥就可以达到。该方法避免了以往使用昂贵的硅烷偶联剂或者在高温有机溶剂环境下进行的缺点，有很好的工业大规模生产的前景。通过对反应条件的考察，提出了二氧化硅和十六醇反应的机理，对目前很多的无机物粉体表面改性机理具有一定的指导意义。
성공실현료수상저온조건하도각납미SiO2적표면개성。십륙순여납미SiO2표면형성화학건합，십륙순적소수성완기련조외배렬개변료SiO2표면성질，유친수표면변위소수표면。표면개성조작재pH위8~10、90℃수용액적조건하반응，120℃홍상중간조취가이체도。해방법피면료이왕사용앙귀적규완우련제혹자재고온유궤용제배경하진행적결점，유흔호적공업대규모생산적전경。통과대반응조건적고찰，제출료이양화규화십륙순반응적궤리，대목전흔다적무궤물분체표면개성궤리구유일정적지도의의。
The silica white obtained from rice husk ash were hydrophilic,so the silica white had bad compatibility with organic compounds when it was used in organic compounds. In this article ,a new modified method was used to get hydrophobic surface. Debasing reaction was carried out at lower temperature in a mild system to modify silica that is obtained from rice husk ash by hexadecanol in situ and to prepare superhydrophobic silica particles. Surface wettability in inorgic materials can also be controlled by alkyl ’s length. This simple experimental method can be further extended to other inorganic material’s surface modification. In order to study the mechanism of this modification, every reaction condition was studied systematically and a reasonable mechanism was proposed. This method is simple convenient and were very meaningful for other inorganica materials ’surface modification.