二氧化硅颗粒表面硅烷化对其润湿性能的影响  

Effect of Surface Silanization on Wettability of Silica Particles

作　　者：王刚[1] 王克亮[1] 逯春晶[1] 黄传鑫 王影[2] 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)

机构地区：[1]东北石油大学提高采收率研究所,大庆163318 [2]吉林大学无机合成与制备化学国家重点实验室,长春130012

出　　处：《硅酸盐学报》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)

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.

关 键 词：二氧化硅 硅烷偶联剂 Pickering乳液 表面改性 接触角 

分 类 号：O647.3[理学—物理化学]