基于主-客体自组装的超分子气凝胶的结构设计、合成及应用
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- 英文论文题名：Supramolecular aerogels derived from host–guest inclusion complexes
- 论文作者：王锦 ; 张学同
- 英文论文作者：Jin Wang ; Xuetong Zhang ; Advanced Materials Division ; Suzhou Institute of Nano-Tech and Nano-bionics ; CAS
- 年：2016
- 作者机构：中国科学院苏州纳米技术与纳米仿生研究所先进材料部气凝胶课题组;
- 论文关键词：气凝胶 ; 超分子自组装 ; 主-客体识别 ; 超分子水凝胶
- 英文论文关键词：Aerogel ; supramolecular self-assemble ; host-guest interaction ; supramolecular hydrogel
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第四十一分会：纳米材料与器件
- 语种：中文
- 分类号：O648.17
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第四十一分会 ; 纳米材料与器件
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：315k
- 原文格式：D
- 会议级别：全国
摘要
本文通过在水溶性高分子水凝胶中引入结晶相作为物理交联点和力学增强骨架,制备出了一种基于主-客体包结物的气凝胶——α-环糊精与聚乙二醇超分子聚准轮烷气凝胶。从结构上看,这种气凝胶是由独特的二维类石墨烯片层三维组装而成;与此同时,通过调节环糊精与聚乙二醇的摩尔配比和浓度,能够实现片层结构的大小及结晶结构的简单控制。这些研究工作表明,以超分子水凝胶为前驱体,通过超临界流体技术,完全可以制备出一种全新的气凝胶:超分子气凝胶。由于此气凝胶骨架为不熔的管道结晶结构包覆一层聚乙二醇结晶层,热学稳定性好,且未参与管道结晶的聚乙二醇是一种优异的相变储能材料,因此获得的超分子气凝胶可作为一种新型多功能的固-固态相变储能材料。即通过把隔热性能优异的气凝胶材料与相变储能材料有机地融合于一体,在保温隔热的同时,材料自身能够吸收和储存能量,并在合适的时机释放储存的能量,因而能够实现能量的最大化利用(如下图1所示)~(1-3)。
Aerogels with low density and high porosity show outstanding properties such as large surface area and low thermal and acoustic conductivity. However, great challenges remain to convert hydrophilic polymer based hydrogels to corresponding aerogels. Here, we report a structurally new type of aerogels, supramolecular aerogels(SMAs), derived from supramolecular hydrogels formed by self-assembling of poly(ethylene glycol) and α-/γ-cyclodextrin. The SMAs posses a characteristic binary crystallized nanosheet structure due to their supramolecular cross-linking nature, and their specific surface areas and nanosheet structures are tunable. Furthermore, we demonstrated application of the aerogels as solid–solid phase change materials with tunable latent heat, reversible melting-crystallization cycle while keeping the microstructure of the SMAs unchanged.~(1-3)
Aerogels with low density and high porosity show outstanding properties such as large surface area and low thermal and acoustic conductivity. However, great challenges remain to convert hydrophilic polymer based hydrogels to corresponding aerogels. Here, we report a structurally new type of aerogels, supramolecular aerogels(SMAs), derived from supramolecular hydrogels formed by self-assembling of poly(ethylene glycol) and α-/γ-cyclodextrin. The SMAs posses a characteristic binary crystallized nanosheet structure due to their supramolecular cross-linking nature, and their specific surface areas and nanosheet structures are tunable. Furthermore, we demonstrated application of the aerogels as solid–solid phase change materials with tunable latent heat, reversible melting-crystallization cycle while keeping the microstructure of the SMAs unchanged.~(1-3)
引文
1.Jin Wang,Xuetong Zhang,ACS Nano 2015,9,11389-11397
2 .Jin Wang,Peng Gao,Lin Ye,Ai-ying Zhang,Zeng-guo Feng,Polym.Chem.2011,2,931-940
3 .Jin Wang,Shuo Li,Lin Ye,Ai-ying Zhang,Zeng-guo Feng,Macromol.Rapid Commun.2012,33,1143-1148
2 .Jin Wang,Peng Gao,Lin Ye,Ai-ying Zhang,Zeng-guo Feng,Polym.Chem.2011,2,931-940
3 .Jin Wang,Shuo Li,Lin Ye,Ai-ying Zhang,Zeng-guo Feng,Macromol.Rapid Commun.2012,33,1143-1148