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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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嵌段共聚物规整纳米多孔薄膜的制备与形貌调控
DOI: 10.11777/j.issn1000-3304.2015.14338, PP. 466-474
Keywords: 嵌段共聚物,自组装,非溶剂致相分离,规整纳米多孔薄膜
Abstract:
通过结合嵌段共聚物自组装与非溶剂致相分离法,制备了上表面为高规整纳米直孔薄层,内部为双连续大孔支撑层的非对称薄膜结构,并考察了铸膜液浓度、溶剂挥发时间、凝固浴温度、刮膜厚度等因素对膜形貌的影响,实现对表面结构的有效调控.研究表明铸膜液浓度与挥发时间的影响有协同效应,随着铸膜液浓度的升高,规整表面孔结构所需的挥发时间减小.若铸膜液浓度不变,挥发时间的增大可使膜表面依次完成从非规整孔、规整柱状孔,再到层状孔的转变.凝固浴温度的降低有利于规整表面结构的形成.当刮膜厚度降低时,原有操作条件下的膜表面形貌形成规律将不再适用,为制备更薄的规整纳米多孔薄膜,需降低挥发时间或采用溶剂退火的方法,这一发现扩展了此类新型薄膜材料制备过程的可操作空间.
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