聚乙烯醇多孔膜的制备及其对二氧化钛的负载研究

发布时间：2018-05-31 02:17

  本文选题：多孔膜 + 二氧化钛　； 参考：《高分子通报》2017年07期

【摘要】：以聚乙烯醇(PVA)为聚合物基体,戊二醛为交联剂,乙酸为催化剂,聚乙二醇6000(PEG-6000)为致孔剂,制备了聚乙烯醇多孔膜(porous PVA films,PPF多孔膜);再将实验室自制的二氧化钛溶胶(TiO_2)负载于PPF多孔膜上,制备得到聚乙烯醇原位负载二氧化钛功能薄膜(PPF-TiO_2)。采用红外光谱、扫描电镜、分光光度计等分别考察了PPF多孔膜的交联条件、负载前后PPF-TiO_2功能薄膜的形貌,PPF-TiO_2功能薄膜对甲基橙的去除率。研究结果表明,为制备适宜交联度及孔径的PPF多孔膜,戊二醛浓度为5%(wt),PEG-6000用量为PVA用量的0.6倍为宜;PPF多孔膜对TiO_2负载的温度为40℃,负载时间为2h能够获得负载量为43%的PPF-TiO_2功能薄膜。此外,PPF-TiO_2功能薄膜比商品化TiO_2对甲基橙的降解率(100mg/L)更快,且具有可循环使用的优势。
[Abstract]:Using PVA (polyvinyl alcohol) as polymer matrix, glutaraldehyde as crosslinking agent, acetic acid as catalyst, polyethylene glycol 6000 (PEG-6000) as pore-forming agent, polyvinyl alcohol (PVA) as polymer matrix, glutaraldehyde as crosslinking agent, polyethylene glycol as catalyst, Poly (vinyl alcohol) porous PVA films were prepared, and then the TIO _ 2 sol prepared by the laboratory was loaded on the PPF porous membranes to prepare polyvinyl alcohol in-situ loaded TIO _ 2 functional thin films (PPF-TiO2C). The crosslinking conditions of PPF porous films were investigated by IR, SEM and spectrophotometer. The morphology of PPF-TiO_2 functional films before and after loading and the removal rate of methyl orange by PPF-TiO2 functional films were investigated. The results showed that in order to prepare PPF porous membrane with suitable crosslinking degree and pore size, the concentration of glutaraldehyde was 0.6 times that of PVA, and the temperature of TiO_2 loaded by PEG-6000 was 40 鈩，

本文编号：1957891