摘要：本实验使用两亲性共聚物F127、纳米复合材料GO和Ag作为功能性添加剂，采用浸没沉淀相转化法，并且通过原位还原反应制备改性的GO-Ag/F127/PVDF膜，通过FTIR、XRD、UV-vis、XPS、SEM、AFM验证了改性膜的化学组成、截面孔结构和表面形貌；通过接触角和抗菌活性评价，对改性膜的亲水性、防污性和渗透性进行了表征。在制膜过程中通过改变凝胶浴（异丙醇）的浓度，改善膜的横截面形态，得到所需的海绵孔，使改性后的PVDF膜具有良好的形貌、良好的亲水性、过滤性和渗透性性。以不同凝胶浴组成制备的改性PVDF膜，对其进行对比表征，探究最优凝胶浴浓度下PVDF膜亲水性、过滤性、渗透性等性能的优化。另外，本次实验最大的创新在于改变凝胶浴的浓度得到性能更强的膜。

关键词：GO-Ag/F127/PVDF改性膜；原位还原法；浸没沉淀相转化法；凝胶浴浓度 

Study on pore structure of Ag/GO PVDF membrane

Abstract：This experiment using amphiphilic copolymers F127, nanocomposite GO and Ag as a functional additive, via in situ reduction reaction process of preparation of modified GO immersion precipitation phase - Ag/F127 / PVDF membrane modification, by FTIR, XRD, UV - vis, XPS, SEM, AFM verify the chemical composition of modified membrane structure and surface morphology, cut face, The contact Angle and antibacterial activity were used to characterize the hydrophilicity, anti-pollution ability and permeability of the modified film. In the process of the membrane by changing (isopropyl alcohol) coagulation bath concentration, improve the membrane cross-section morphology, get a sponge, so as to make the modification of PVDF membranes with excellent appearance, good water, filtering, permeability. The modified PVDF membrane prepared with different gel bath compositions was compared and characterized to explore the optimization of the hydrophilicity, filter-filtering and permeability of PVDF membrane at the optimal concentration of gel bath. In addition, the biggest innovation of this experiment is to change the gel bath concentration to obtain a more powerful membrane.

Key Words: GO-Ag/F127/PVDF modified membrane; In-situ reduction method; Immersion precipitation phase conversion method; The concentration of the coagulation bath

目 录

1 绪论 1

1.1 概述 1

1.2 PVDF（聚偏氟乙烯）膜 1

1.2.1 PVDF膜材料 2

1.2.2 PVDF膜成膜过程 2

1.2.3 PVDF膜亲水性改性技术介绍 3

1.2.4 PVDF膜的抗污染情况介绍 5

1.3 本课题研究的主要内容和意义 7

2 实验部分 9

2.1 实验材料及试剂 9

2.2 实验仪器 9

2.3 实验步骤 10

2.3.1 实验流程图 10

2.3.2 高分散氧化石墨烯GO的制备 10

2.3.3 PVDF改性膜的制备和结构调控 11

2.3.4 PVDF膜的表征 11

3 结果与讨论 12

3.1 氧化石墨烯GO的表征与分析 12

3.1.1 GO的表征 12

3.1.2 GO的结果分析 13

3.2 Ag/GO PVDF改性膜的表征与分析 Ag/GOPVDF膜的孔结构调节研究:http://www.chuibin.com/huaxue/lunwen_205590.html