Preparation of skinless polymer foam with supercritical carbon dioxide and its application to a photoinduced hydrogen evolution system
Preparation of skinless polymer foam with supercritical carbon dioxide and its application to a photoinduced hydrogen evolution system
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DOI：
10.1016/j.polymer.2008.01.049
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发表时间：
2008-03-17
期刊：
影响因子：
4.6
通讯作者：
Hori, T.
中科院分区：
文献类型：
--
作者：
Morisaki, M.;Ito, T.;Hori, T.
用超临界二氧化碳(SCCO(2))处理聚甲基丙烯酸甲酯(PMMA)，制备了无皮聚合物泡沫。薄膜在含有乙醇的SCCO(2)中浸泡成核，然后在热水浴中孵化，诱导核生长，制备无皮PMMA泡沫。得到的聚合物泡沫密度低，细胞相互连接，通过皮肤层形成通道。低相对分子质量的PMMA通过膨胀形成无皮泡沫，泡孔较大。含锡四苯基卟啉的聚甲基丙烯酸甲酯薄膜也用同样的方法发泡，并将其用于光诱导析氢。与有皮泡沫相比，无皮PMMA泡沫塑料上的光催化剂释放出更多的氢气。增大固体载体的有效比表面积和泡沫内的光散射可以提高光催化剂的循环数(吨)。(C)2008爱思唯尔有限公司。保留所有权利。
Skinless polymer foam was prepared by treating poly(methyl methacrylate) (PMMA) with supercritical carbon dioxide (scCO(2)). The film was immersed in scCO(2) with ethanol to nucleate, and then incubated in a hot water bath to induce nuclear growth and to prepare skinless PMMA foam. The obtained polymer foam had a low density and cells were connected to each other to make channels through the skin layer. Low molecular weight PMMA formed skinless foam with larger cells through expansion. PMMA film containing tin meso-tetraphenyl porphyrin was also foamed with same procedure and the foam was used for photoinduced hydrogen evolution. A larger amount of hydrogen evolved from the photocatalyst on the skinless PMMA foam in comparison with the foam with skin. Enlargement of effective surface area of solid support and light scattering within the foam could enhance turnover number (TON) of photocatalyst. (c) 2008 Elsevier Ltd. All rights reserved.