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### 具有不对称孔道结构的小介孔二氧化硅粒子的合成及其高分子杂化膜的构建

1. 1.浙江工商大学环境科学与工程学院, 杭州 310012
2.太原科技大学材料科学与工程学院, 太原 030024
• 收稿日期:2020-08-03
• 通讯作者: 王挺 E-mail:zjwtwaiting@hotmail.com
• 基金资助:
浙江省自然科学基金(LY19B060004)

### Preparation of Small Mesoporous SiO2 Particles with Asymmetric Tunnel Structure and Fabrication of the Resulting Hybrid Membranes

TONG Cheng1, WU Wentao2, WANG Ting1()

1. 1.School of Environmental Science and Engineering，Zhejiang Gongshang University，Hangzhou 310012，China
2.School of Materials Science and Engineering，Taiyuan University of Science and Technology，Taiyuan 030024，China
• Received:2020-08-03
• Contact: WANG Ting E-mail:zjwtwaiting@hotmail.com
• Supported by:
Suppored by the Natural Science Foundation of Zhejiang Province, China(LY19B060004)

Abstract:

Through a soft template method using chiral anionic acid as a surfactant， small mesoporous SiO2 particles with asymmetric tunnel structures were firstly prepared. Then， the small mesoporous SiO2 particles were incorporated into polyvinylidene fluoride（PVDF） and polyimide（PI） to fabricate two kinds of organic-inorganic hybrid membranes. Fourier transform infrared spectrometer（FTIR）， transmission electron microscope（TEM）， Scanning electron microscope（SEM） and Brunner-Emmet-Teller（BET） measurement were employed to characterize the microstructure of the small mesoporous SiO2 and the resulting organic-inorganic hybrid membranes. The performance of the PVDF and PI hybrid membranes were evaluated by ultrafiltration and gas permeation experiments， respectively. The results showed that the small mesoporous SiO2 particles with a lot of hydrophilic groups on its surface had a regular and orderly arranged pore structure， which presented spiral twists and asymmetry. Addition of small mesoporous SiO2 particles would significantly improve the polarity of the two kinds of hybrid membranes， thereby effectively enhancing the anti-pollution performance of the PVDF membranes and the performance of the PI membranes for CO2 separation. Moreover， the tunnel structures of mesoporous SiO2 could also introduce a confined mass transfer channel， which could accelerate the diffusion of CO2 molecule through the PI hybrid membrane. Addition of too many mesoporous SiO2 caused the formation of aggregates in the polymer membranes， which weakened the polarity and hydrophilicity of membranes， thereby depressing the performance of the two kinds of hybrid membranes.