1st Conference on Light and Particle Beams in Materials Science 2013 | |
Adsorption of water to double-network polymers having a hierarchical structure | |
物理学;材料科学 | |
Tominaga, Taiki^1 ; Takata, Shin-Ichi^1 ; Suzuki, Jun-Ichi^1,2 ; Aizawa, Kazuya^1 ; Seto, Hideki^3 ; Arai, Masatoshi^1 | |
Materials and Life Science Division, J-PARC Center, Japan Atomic Energy Agency, 2-4 Shirakatashirane, Tokyo, Ibaraki 319-1195, Japan^1 | |
Research Center for Neutron Science and Technology, Comprehensive Research Organization for Science and Society, 162-1 Shirakata, Tokyo, Ibaraki 319-1106, Japan^2 | |
Japan Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan^3 | |
关键词: 2-acrylamido-2-methylpropane sulfonic acids; Adsorption of water; Double-network hydrogels; Hierarchical structures; Hydrophilic polymer networks; Low relative humidities; Nanoscale structure; Network polymers; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/502/1/012058/pdf DOI : 10.1088/1742-6596/502/1/012058 |
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学科分类:材料科学(综合) | |
来源: IOP | |
【 摘 要 】
Double-network hydrogels (DN-gels) have cross-linked aqueous polymer networks which result in unique mechanical properties [1,2]. Although the structure of the hydrophilic polymer networks have been previously determined [3,4,5], it was not clear how water molecules are adsorbed to the polymer network. We prepared freeze-dried DN-gels (DN-polymers) made of polyacrylamide and sodium salt of poly(2-acrylamido-2-methylpropane sulfonic acid), and small-angle neutron scattering (SANS) experiments were conducted to determine the humidity dependence of the nanoscale structure. The SANS results show that water molecules adsorb on larger structures than the mesh size of polymer networks at low relative humidity (RH), and adsorb gradually on the segmental scale of polymers with increasing RH.
【 预 览 】
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