自清洁PVDF膜材的研究与制备

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• 英文论文题名：Research and Preparation of Self-cleaning PVDF Membrane Material
• 论文作者：杨文芳 ; 赵晓明 ; 张健飞 ; 张仲达 ; 李庆梦
• 英文论文作者：YANG Wenfang ; ZHAO Xiaoming ; ZHANG Jianfei ; ZHANG Zhongda ; LI Qingmeng ; School of Textiles ; Tianjin Polytechnic University ; Key Laboratory of Advanced Textile Composites ; Ministry of Education
• 年：2016
• 作者机构：天津工业大学纺织学院;先进纺织复合材料教育部重点实验室;
• 论文关键词：聚偏氟乙烯 ; 荷叶效应 ; 模板法 ; 超疏水自清洁 ; 低温等离子体
• 英文论文关键词：polyvinylidene fluoride ; lotus effect ; template method ; super hydrophobic and self-cleaning ; low temperature plasma
• 会议召开时间：2016-11-18
• 会议录名称：第一届先进材料前沿学术会议论文集（《材料导报》2016年第30卷第Z1期）
• 语种：中文
• 分类号：TQ325.4;TB383.2
• 学会代码：CLDB
• 会议名称：第一届先进材料前沿学术会议
• 会议地点：中国陕西西安
• 主办单位：《材料导报》杂志社
• 学会名称：材料导报编辑部
• 页数：5
• 文件大小：1731k
• 原文格式：O
• 会议级别：全国

摘要

以PVDF(聚偏氟乙烯)作为建筑膜材料的表层具有一定防污性,但难以满足自洁的要求。基于粗糙表面润湿理论,首先以不同粒径的碳化硅粒子制备了系列粗糙度的模板,以模板法制备了粗糙度梯度变化的PVDF膜,以及在膜表面负载低表面能物质,探讨粗糙度及表面能对粗糙表面疏水性的影响;以CF_4为气氛的等离子体对膜表面进行低表面能修饰实验。结果表明:粗糙度对膜的疏水性影响显著;在相同粗糙度时膜的接触角顺序为:θ_(负载分氟树脂)>θ_(负载有机磕)>θ_(负载石蜡)>θ_(未改性);经等离体修饰后在PVDF大分子中引入了-CF_3、-HCF_2基团,膜疏水性能显著提高,测得的接触角为164.6°,滚动角为2.1°;SEM图、AFM图显示膜表面具有类荷叶的微纳米分级结构;集灰实验显示,薄膜具有优良的自洁性能。
PVDF(polyvinylidene fluoride) as architecture membrane surface material has a certain degree of water repellency,but it cannot meet the requirement of self-cleaning.Based on wetting theory of rough surface,the roughness template was prepared by a series of different particle size of silicon carbide particles,the paper prepares a rough surface PVDF membrane by template method,and then the PVDF membrane is modified by low temperature plasma to get low surface energy in CF4,the effect of surface energy on hyrophobicity of rough surface is also studied.The results show that roughness of PVDF membrane has obvious influence on its hydrophobicity.The contact angles of PVDF membrane order in sequence;θ_(fluorine resin)>θ_(silicone)>θ_(paraffin)>θ_(unmodified).-CF_3 and-HCF_2 groups exists in PVDF molecules when modified by low temperature plasma,and PVDF membrane has obvious increasing contact angle of 164.6°,its rolling angle is 2.1°.The SEM and AFM photograph illustrates that the PVDF membrane has micro-nano hierarchical structure like lotus.Collecting ash experiment proves its well self-cleaning property.

引文

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