烷基SiO2制备条件对PTFE膜疏水改性效果的影响 |
作者:邵伟1, 彭倩倩1,2, 郭春刚2, 常娜1, 王海涛3, 刘国昌2 |
单位: 1. 天津工业大学 化学工程与技术学院, 天津 300387; 2. 自然资源部天津海水淡化与综合利用研究所, 天津 300192; 3. 天津工业大学 环境科学与工程学院, 天津 300387 |
关键词: 烷基二氧化硅; 聚四氟乙烯膜; 超疏水;溶胶-凝胶 |
DOI号: 10.16159/j.cnki.issn1007-8924.2024.06.008 |
分类号: TQ316.6; TQ325.4 |
出版年,卷(期):页码: 2024,44(6):64-70 |
摘要: |
疏水性聚四氟乙烯(PTFE)膜在膜蒸馏、膜吸收等膜接触器过程中具有广泛应用前景.以纯水、无水乙醇、氨水、正硅酸乙酯(TEOS)为原料,采用溶胶-凝胶法制备二氧化硅(SiO2)纳米粒子胶体溶液,进而以甲基三乙氧基硅烷(MTES)为有机改性剂,对SiO2纳米粒子进行表面修饰,制备得到烷基SiO2浸涂液.探究了原料比例对SiO2纳米粒子粒径大小的影响;进一步考察了浸涂液制备时长以及MTES与TEOS质量比对PTFE膜疏水改性效果的影响.结果表明,增大氨水、TEOS用量并提升纯水与无水乙醇的比例,可减小SiO2纳米粒子的粒径;延长制备时间或提升MTES与TEOS质量比,均会使膜表面接触角先增大后减小;当原料质量比为13.32∶11.92∶1.92∶1(纯水、无水乙醇、氨水、正硅酸乙酯)、烷基SiO2浸涂液的制备时长为24 h、MTES与TEOS的质量比为3∶1时,改性后PTFE膜表面接触角可达156°,超疏水效果显著. |
Hydrophobic polytetrafluoroethylene (PTFE) membrane has a wide application prospect in membrane contactor processes such as membrane distillation and membrane absorption. In this research, a colloidal solution of silica (SiO2) nanoparticles was prepared by sol-gel method, using pure water, anhydrous ethanol, ammonium hydroxide, and tetraethyl orthosilicate (TEOS) as raw materials. Then, with methyl triethoxysilane (MTES) used as the organic modifier, SiO2 nanoparticles were modified on the surface to prepare the alkyl SiO2 dipping solution. This research investigated the effect of raw material ratio on the particle size of SiO2 nanoparticles, along with the effects of preparation time and mass ratio of MTES to TEOS on the hydrophobic modification of PTFE film were further investigated. The results show that the size of SiO2 nanoparticles can be reduced by increasing the amount of ammonium hydroxide and TEOS, and increasing the ratio of pure water to anhydrous ethanol. Extending the preparation time or increasing the mass ratio of MTES to TEOS could increase the contact angle of the membrane surface at first and then decreased. When the mass ratio of raw material was 13.32∶11.92∶1.92∶1(pure water, anhydrous ethanol, ammonium hydroxide, and tetraethyl orthosilicate), the preparation time of alkyl SiO2 dipping solution was 24 h, and the mass ratio of MTES to TEOS was 3∶1, the surface contact angle of the modified PTFE membrane reached 156°, and the superhydrophobic effect was significant. |
基金项目: |
中央级公益性科研院所基金(K-JBYWF-2023-QR-02);企业合作研发课题(B5-20210429) |
作者简介: |
邵伟(1979-),男,天津人,博士研究生,高级实验师,从事膜分离与膜过程研究. |
参考文献: |
[1]顾榴俊.聚四氟乙烯及其应用研究进展[J].浙江化工,2020,51(3):1-5. [2]张香归. 超疏水-超亲油聚四氟乙烯超细纤维膜的制备及应用研究[D].杭州:浙江理工大学,2023. [3]连衍成,梁富源,贺建超,等.超疏水聚四氟乙烯材料制备工艺的研究进展[J].中国腐蚀与防护学报,2023,43(2):231-241. [4]吴强,周军浩,李一心,等.具有坚固孔隙结构的超疏水纳米纤维膜设计用于膜蒸馏[J].膜科学与技术,2024,44(1):63-70. [5]杨跃,任亚涛,赵子龙,等.基于膜吸收法处理垃圾渗滤液废水的研究[J].现代化工,2023,43(7):176-181. [6]董文瑞,喻媛,杨悦悦,等.超疏水膜在油水分离中应用的研究进展[J].化工新型材料,2019,47(S1):16-19. [7]Wang P,Li C,Zhang D, et al. Recent advances in chemical durability and mechanical stability of superhydrophobic materials: Multi-strategy design and strengthening[J].J Mater Sci Technol,2022,129(34):40-69. [8]Wang S Q, Wang Y M, Zhou Y C, et al. Scalable-manufactured superhydrophobic multilayer nanocomposite coating with mechanochemical robustness and high-temperature endurance[J].ACS Appl Mater Interfaces,2020,12(31):35502-35512. [9]李国滨,刘海峰,李金辉,等.超疏水材料的研究进展[J].高分子材料科学与工程,2020,36(12):142-150. [10]朱耿增,杜宝帅,王晓明,等.超疏水涂层制备方法研究进展[J].炼油与化工,2023,34(4):15-19. [11]顾佳华,王惠婷,戴鑫鑫,等.超疏水纺织材料研究现状[J].化工新型材料,2023,51(2):24-29. [12]刘振,许志浩.聚丙烯中空纤维膜的超疏水改性[J].天津工业大学学报,2017,36(1):15-19. [13]车振宁,刘国昌,郭春刚,等.基于全氟硅烷/烷基SiO2协同效应的PTFE中空纤维膜表面超疏水改性研究[J].塑料工业,2020,48(7):19-23. [14]王佳,赵毅,杨臻,等.超疏水SiO2@OTES自清洁涂层的制备及性能[J].应用化工,2023,52(4):1115-1120. [15]李清江,杨莹,蒋莉,等.表面改性纳米二氧化硅粒子制备与分散性表征分析[J].实验技术与管理,2019,36(10):159-162. [16]陈博,陈学琴,任军,等.纳米二氧化硅表面改性研究进展[J].有机硅材料,2017,31(5):396-400. [17]仝元东,刘雨薇,陈拥强,等.纳米SiO2微球的制备及其结构与性能研究[J].中国陶瓷,2024,60(2):9-19. [18]楚诗妤,郑志皓,何承珂,等.二氧化硅/聚四氟乙烯疏水海绵的制备[J].武汉工程大学学报,2022,44(2):170-173,218. [19]鄢俊. 改性二氧化硅粒子的制备及其对水性树脂的超疏水改性[D]. 广州:华南理工大学,2022. [20]廖奕鸥,冯辉,张重远.激光共聚焦显微镜测量表面粗糙度的探究[J].分析测试技术与仪器,2023,29(2):203-208. [21]张艳华,葛鹰.激光共聚焦显微镜在铜箔表面粗糙度测量中的应用[J].印制电路信息,2020,28(3):26-29. |
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