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基于金属离子交联的自修复聚丙烯酸水凝胶 被引量:5
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作者 薛诗山 武元鹏 +4 位作者 刘兰芳 任文豪 林元华 郑朝晖 丁小斌 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2018年第7期15-19,共5页
自修复水凝胶在被破坏后,断裂部分能够自发愈合回复到初始状态,其具有重要的应用价值。文中利用Fe^(3+)与聚丙烯酸分子链中羧基之间的相互作用,构筑具有自修复性能的水凝胶。聚合过程中,在丙烯酸单体中加入Fe Cl_3和过硫酸钾,在室温条... 自修复水凝胶在被破坏后,断裂部分能够自发愈合回复到初始状态,其具有重要的应用价值。文中利用Fe^(3+)与聚丙烯酸分子链中羧基之间的相互作用,构筑具有自修复性能的水凝胶。聚合过程中,在丙烯酸单体中加入Fe Cl_3和过硫酸钾,在室温条件下引发丙烯酸聚合,反应6 h后制得水凝胶。Fe^(3+)在体系中同时起到交联剂和引发剂的作用。该方法制备时原料简单、反应条件温和,特别适合于规模化生产。所制备的水凝胶自修复速度快,12 min内即可完全修复,修复后水凝胶力学性能基本能回复到修复以前的状态。而且水凝胶透明性好,适合于制备光学性能优异的水凝胶材料。 展开更多
关键词 自修复水凝胶 聚丙烯酸 铁离子
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Anisotropy of Photocatalytic Properties in Nanostructured Photocatalysts
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作者 Huanchun Wang lina Qiao +3 位作者 Haomin Xu yuanhua lin Yang Shen Cewen Nan 《Soft Nanoscience Letters》 2016年第2期11-30,共20页
Energy band engineering and the nature of surface/interface of a semiconductor play a significant role in searching high efficiency photocatalysts. Actually, the active facets, morphology controlling, especially the e... Energy band engineering and the nature of surface/interface of a semiconductor play a significant role in searching high efficiency photocatalysts. Actually, the active facets, morphology controlling, especially the exposed facets modulation of photocatalysts during preparation are very desirable. In order to achieve high photocatalytic performance, intrinsic mechanism of such anisotropic properties should be fully considered. In this review, we mainly emphasis on the latest research developments of several extensively investigated photocatalysts and their anisotropic photocatalytic properties, as well as the correlation between effective masses anisotropy and photocatalytic properties. It will be helpful to understand the photocatalytic mechanism and promote rational development of photocatalyst for wide applications. 展开更多
关键词 ANISOTROPY Carriers Effective Mass Photocatalytic Properties
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