摘要
采用3-氨丙基三乙氧基硅烷(APTES)接枝改性二氧化硅颗粒表面,通过调节APTES的接枝密度(颗粒表面每平方纳米接枝硅烷偶联剂分子的个数)定量控制二氧化硅颗粒在石蜡/水界面上的接触角。结果表明:随着APTES在二氧化硅颗粒表面接枝密度的增加,颗粒由超亲水转变为疏水,在油水界面的接触角从15°增加到116°;改性颗粒在石蜡/水界面形成固态膜,当石蜡低温固化后,改性颗粒在石蜡相中的部分被掩盖;相比于未改性颗粒,改性后的颗粒在石蜡表面形成的包裹层更加紧密有序。
The surface of silica particles were modified by(3-aminopropyl)-triethoxysilane(APTES). The contact angle of silica particles in the wax-water(W) interface was quantitatively controlled by tuning the APTES grafting density. The modified particles(APTES @ SiO2) were used to prepare the wax/W Pickering emulsions. The results show that the particles are changed from superhydrophilic to hydrophobic as APTES graft density increases, and the contact angle of wax/W interface increases from 15° to 116°. The modified particles formed the solid film in the Wax/W interface, and the part of the modified particles is shielded after wax solidifying. Compared to the bare particles, the modified particles pack more closely and in a more ordered fashion on the wax surface.
作者
王刚
王克亮
逯春晶
黄传鑫
王影
WANG Gang, WANG Keliang, LU Chunjing, HUANG Chuanxin, WANG Ying(1. Laboratory of EOR Technology, Northeast Petroleum University, Daqing 163318, China; 2. State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, Jilin University, Changchun 130012, Chin)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2018年第7期905-909,共5页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金项目(51374073)