聚偏氟乙烯（PVDF）膜的制备与研究

发布时间：2018-04-15 04:34

本文选题：聚四氢呋喃二丙烯酸酯(PTMGDA) + 聚丙烯酸甲酯(PMMA)　；参考：《上海应用技术大学》2015年硕士论文

【摘要】：在本文中,主要采用浸没沉淀相转化法(NIPS)改性研究制备聚偏氟乙烯膜,并研究探讨了两亲性聚合物、PMMA和石墨烯对PVDF膜综合性能的影响。具体研究内容结果如下:首先,聚四氢呋喃(PTMG)和丙烯酰氯酯化反应合成聚四氢呋喃二丙烯酸酯(PTMGDA)。采用聚四氢呋喃二丙烯酸酯与聚乙二醇丙烯酸酯原位自由基聚合反应共混改性制备聚偏氟乙烯膜。实验数据说明,添加PTMGDA和PEGMA单体后,PVDF膜的纯水通量急剧增加,但是加入AIBN通过原位自由基聚合反应后,膜的纯水通量降低,但是随着二者含量的增加,纯水通量可达到60Lm-1.h-1。随着PTMGDA与PEGMA含量的增加,聚偏氟乙烯膜的亲水性明显增强,机械性能得到了提升。其次,选用PMMA改性PVDF膜,通过同时添加PMMA、PVP来讨论了二者在改性PVDF膜的协同作用。实验数据说明,同时添加PMMA与PVP之后,铸膜液的粘度增加,凝胶速率加快。PMMA-PVDF膜的纯水通量急剧增加,SEM结果表明,同时添加PMMA和PEGMA,形成大的指状孔结构,PVDF膜的亲水性得到了改善。最后,通过石墨烯来改性PMMA-PVDF膜的机械性能以及其他的PVDF膜的综合性能。研究讨论了添加不同量的石墨烯对PMMA-PVDF膜的性能影响。实验数据说明,通过石墨烯共混改性以后,聚偏氟乙烯膜的机械强度(抗拉强度、伸长率以及弹性模量)增强,亲水性得到了改善,并且添加石墨烯之后,聚偏氟乙烯膜的表面与断面孔结构发生了明显的变化。
[Abstract]:In this paper, polyvinylidene fluoride (PVDF) membranes were prepared by immersion precipitation phase inversion (IPS) method, and the effects of amphiphilic polymers (PMMA) and graphene (graphene) on the comprehensive properties of PVDF membranes were investigated.The results are as follows: firstly, the polytetrahydrofurandiacrylate (PTMGDAA) was synthesized by esterification of polytetrahydrofuran (PTMG) with acryloyl chloride.Polyvinylidene fluoride (PVDF) membranes were prepared by in situ radical polymerization of poly (tetrahydrofuran) diacrylate and polyethylene glycol acrylate (PEG).The experimental data show that the pure water flux of PTMGDA and PEGMA membranes increases dramatically, but the pure water flux decreases with the addition of AIBN through in situ free radical polymerization. However, the pure water flux can reach 60Lm-1.h-1 with the increase of the content of AIBN.With the increase of PTMGDA and PEGMA content, the hydrophilicity and mechanical properties of PVDF membrane were obviously enhanced.Secondly, the synergistic effect of PMMA on the modified PVDF membrane was discussed by adding PMMA PVDF membrane at the same time.The experimental data show that the viscosity of casting solution increases and the pure water flux of PMMA-PVDF membrane increases sharply after the addition of PMMA and PVP at the same time. The results show that the hydrophilicity of PVDF membrane is improved by adding PMMA and PEGMA at the same time.Finally, the mechanical properties of PMMA-PVDF films and the comprehensive properties of other PVDF films were modified by graphene.The effect of different amount of graphene on the properties of PMMA-PVDF films was studied.The experimental data show that the mechanical strength (tensile strength, elongation and elastic modulus) of polyvinylidene fluoride (PVDF) membrane is enhanced, the hydrophilicity is improved, and graphene is added into PVDF membrane after modified by graphene blend, and the mechanical strength (tensile strength, elongation and elastic modulus) of PVDF membrane is improved.The surface and cross-section pore structure of PVDF film changed obviously.
【学位授予单位】：上海应用技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ051.893

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