Effect of OH group on the water vapor sorption property of adamantane-containing polymer membranes
Effect of OH group on the water vapor sorption property of adamantane-containing polymer membranes
复制标题
DOI：
10.1016/j.memsci.2012.09.043
复制
发表时间：
2013-01
影响因子：
9.5
通讯作者：
S. Kanehashi;Shimpei Konishi;Kazuoki Takeo;Kunihisa Owa;Hiroshi Kawakita;Shuichi Sato;T. Miyakoshi;K. Nagai
中科院分区：
文献类型：
--
作者：
S. Kanehashi;Shimpei Konishi;Kazuoki Takeo;Kunihisa Owa;Hiroshi Kawakita;Shuichi Sato;T. Miyakoshi;K. Nagai
研究了含金刚烷的丙烯酸或甲基丙烯酸聚合物的合成和特性，重点研究了疏水性金刚烷基单元和亲水性OH基团的影响。金刚烷聚合物膜的水蒸气吸附性能在35℃下测定。代表聚合物链段堆积的膜密度随着羟基基团的增加而增加，而聚合物内聚能密度（CED）则反映了聚合物的极性。由于OH基团与水分子之间的高度相互作用，含OH金刚烷聚合物膜中的水蒸气溶解度高于不含OH金刚烷聚合物膜中的水蒸气溶解度。因此，金刚烷单元中的OH基团提供了膜中水分子的吸附位点。此外，根据 Zimm-Lundberg 分析，我们发现水分子和聚合物之间的 OH 基团更强的相互作用可以防止水分子聚集。
The synthesis and characteristics of adamantane-containing acryl or methacryl polymers were investigated, focusing on the effects of the hydrophobic adamantyl unit and the hydrophilic OH group. The water vapor sorption property of adamantane polymer membranes was determined at 35°C. The membrane density which represents the packing of polymer segments increased with increasing the OH groups and the polymer cohesive energy density (CED), which reflects the polarity of polymers. The water vapor solubility in OH-containing adamantane polymer membranes was higher than that in non-OH-containing adamantanes due to the high interaction between the OH group and the water molecules. Therefore, the OH groups in the adamantane unit give the sorption site of the water molecules in the membranes. In addition, we found that the stronger interaction by OH groups between the water molecules and polymers can prevent the clustering of water molecules based on the Zimm–Lundberg analysis.