聚甲基丙烯酸缩水甘油酯光交联honeycomb膜的制备
发布时间：2019-06-29 17:50
【摘要】：Honeycomb膜是一种具有蜂窝状结构的微米尺寸均孔膜,以高湿度环境中沉积到挥发性聚合物溶液表面并规整排列的水滴作为模板制备得到。尽管成孔过程简单,但传统制备honeycomb膜的聚合物合成过程繁琐,所得到的honeycomb膜也存在耐溶剂性、耐热性差等问题,限制了其在苛刻环境中的应用。将多孔膜交联可以有效解决这一缺陷,光化学交联具有高效、易操作、污染小等优势近年来逐渐得到研究者关注。本文首次以甲基丙烯酸缩水甘油酯的均聚物(PGMA),利用静态呼吸图案法,制备出高度规整的honeycomb膜,并通过阳离子光固化对多孔膜实现了交联。1.通过热自由基溶液聚合制备了不同分子量的线性PGMA,利用静态呼吸图案法,通过调控成孔过程中多种实验参数,制备出高度规整的honeycomb膜,利用SEM和激光直射实验手段对所得多孔膜形貌及性质进行表征。结果表明,溶剂的种类对能否成孔起关键作用,在本实验中,以CH2Cl_2和CHCl_3按照70:30 (体积比)互混作溶剂可以制备规整多孔膜;分子量为15K,45K,100K左右的聚合物,在合适的溶液浓度范围内能有效稳定水滴而得到规整孔结构;在一定范围内,孔径随环境湿度增加而线性增长。2.上述制备的honeycomb膜表面带有大量可交联的环氧基团,通过阳离子引发剂溶液浸泡光照对多孔膜实现快速交联。通过SEM、AFM等对交联后多孔膜进行表征。结果表明,与未交联膜相比,交联后孔的结构保存完好,可以耐受CH2Cl2, CHCl3, THF,丙酮等有机溶剂长达一周,其耐热性提高了 125℃。3.交联后的多孔膜提供二氧化硅在表面生长的化学位点,将其作为模板,通过化学气相沉积法,得到孔径和壁厚可调的可独立支撑的无机二氧化硅的honeycomb膜,在光电领域有潜在应用。同时,分别以剥离前后的聚合物多孔膜作为模板,选择性制备了二氧化硅的微米碗和微米盘,在细胞培养及载体领域有潜在的应用价值。
[Abstract]:Honeycomb film is a kind of micron uniform pore film with honeycomb structure. The water droplets deposited on the surface of volatile polymer solution in high humidity environment and arranged regularly are prepared as templates. Although the pore forming process is simple, the traditional polymer synthesis process of honeycomb film is tedious. The obtained honeycomb film also has some problems, such as solvent resistance, poor heat resistance and so on, which limits its application in harsh environment. This defect can be effectively solved by cross-linking porous membranes. Photochemical crosslinks have been paid more and more attention by researchers in recent years because of their advantages of high efficiency, easy operation and low pollution. In this paper, the highly structured honeycomb film was prepared by static respiratory pattern method with glycidyl methacrylate homopolymer (PGMA), for the first time, and the porous film was crosslinked by cationic light curing. Linear PGMA, with different molecular weight was prepared by thermal free radical solution polymerization by static respiratory pattern method, and highly regular honeycomb films were prepared by adjusting various experimental parameters in the process of pore formation. The morphology and properties of the porous films were characterized by SEM and laser direct emission experiments. The results show that the type of solvent plays a key role in the formation of pores. In this experiment, regular porous membranes can be prepared by mixing CH2Cl_2 and CHCl_3 with 70:30 (volume ratio); the polymer with molecular weight of 15K, 45K and 100K can effectively stabilize the water droplets in a suitable solution concentration range to obtain the regular pore structure; in a certain range, the pore size increases linearly with the increase of environmental humidity. The surface of the prepared honeycomb film has a large number of crosslinked epoxy groups, and the porous film can be crosslinked rapidly by soaking in cationic initiator solution. The crosslinked porous membranes were characterized by SEM,AFM et al. The results showed that compared with the uncrosslinked membrane, the structure of the crosslinked pores was well preserved, and it could withstand CH2Cl2, CHCl3, THF, acetone and other organic solvents for as long as one week, and its heat resistance was increased by 125 鈩，
本文编号：2508001
[Abstract]:Honeycomb film is a kind of micron uniform pore film with honeycomb structure. The water droplets deposited on the surface of volatile polymer solution in high humidity environment and arranged regularly are prepared as templates. Although the pore forming process is simple, the traditional polymer synthesis process of honeycomb film is tedious. The obtained honeycomb film also has some problems, such as solvent resistance, poor heat resistance and so on, which limits its application in harsh environment. This defect can be effectively solved by cross-linking porous membranes. Photochemical crosslinks have been paid more and more attention by researchers in recent years because of their advantages of high efficiency, easy operation and low pollution. In this paper, the highly structured honeycomb film was prepared by static respiratory pattern method with glycidyl methacrylate homopolymer (PGMA), for the first time, and the porous film was crosslinked by cationic light curing. Linear PGMA, with different molecular weight was prepared by thermal free radical solution polymerization by static respiratory pattern method, and highly regular honeycomb films were prepared by adjusting various experimental parameters in the process of pore formation. The morphology and properties of the porous films were characterized by SEM and laser direct emission experiments. The results show that the type of solvent plays a key role in the formation of pores. In this experiment, regular porous membranes can be prepared by mixing CH2Cl_2 and CHCl_3 with 70:30 (volume ratio); the polymer with molecular weight of 15K, 45K and 100K can effectively stabilize the water droplets in a suitable solution concentration range to obtain the regular pore structure; in a certain range, the pore size increases linearly with the increase of environmental humidity. The surface of the prepared honeycomb film has a large number of crosslinked epoxy groups, and the porous film can be crosslinked rapidly by soaking in cationic initiator solution. The crosslinked porous membranes were characterized by SEM,AFM et al. The results showed that compared with the uncrosslinked membrane, the structure of the crosslinked pores was well preserved, and it could withstand CH2Cl2, CHCl3, THF, acetone and other organic solvents for as long as one week, and its heat resistance was increased by 125 鈩，
本文编号：2508001
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