共查询到19条相似文献,搜索用时 62 毫秒
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淀粉接枝丙烯酸类超强吸水剂的结构、吸水机理和商业应用 总被引:2,自引:0,他引:2
淀粉接枝丙烯酸类超强吸水剂在各个领域的应用越来越广泛。本文简述了淀粉接枝丙烯酸类超强吸水剂的结构和吸水机理,并主要介绍了淀粉接枝丙烯酸类超强吸水剂目前的一些商业应用,包括在生理卫生用品、土木建筑、食品、农业、医药等方面的应用,同时对淀粉接枝丙烯酸类超强吸水剂的发展前景进行了展望。 相似文献
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超强吸水剂的应用及展望 总被引:9,自引:0,他引:9
超强吸水剂是一种新型的功能高分子材料,由于它具有很强的吸水性和优良的保水性,因而在工业、农林、园艺及日常生活等方面具有广阔的应用前景。介绍了超强吸水剂的研究状况、吸水机理、制备方法、应用现状及展望。 相似文献
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淀粉接枝丙烯酸类超强吸水剂的制备及其研究进展 总被引:3,自引:0,他引:3
概述了淀粉接枝丙烯酸类超强吸水剂的制备及其进展,详细介绍了淀粉接枝丙烯酸类超强吸水剂的制备原理、影响制备的因素以及不同的合成方法,包括间歇式水溶液聚合法、连续聚合法和反相悬浮聚合法等,并且提出了今后的发展方向。 相似文献
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文章通过实验从单体浓度、交联剂、引发剂、中和剂及温度五个方面分析了不同因素对超强吸水剂吸水性能的影响,并且得出了比较理想的超强吸水剂的合成方案。 相似文献
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超强吸水聚合物的研究进展 总被引:2,自引:0,他引:2
介绍了超强吸水聚合物的国内外研究开发情况。综述了其制备方法和应用。结合超强吸水聚合物的市场潜力与成本的分析 ,对超强吸水聚合物的发展前景作了展望。 相似文献
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高吸水性树脂研究进展 总被引:3,自引:0,他引:3
介绍了高吸水性树脂的种类,回顾了国内外高吸水性树脂的发展历程,论述了高吸水性树脂的结构及吸水机理阐,述了高吸水性树脂的制备方法及应用领域展,望了高吸水性树脂的发展方向。 相似文献
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氧化石墨烯改性吸水树脂综合了氧化石墨烯和吸水树脂的优势,在水处理吸附、药物缓释、组织工程等领域有广阔的应用前景。目前有关氧化石墨烯改性吸水树脂的制备方法、性能及应用缺少相关的综述。因此,本文主要分四部分来综述近几年氧化石墨烯改性吸水树脂的研究进展。第一部分简要介绍了氧化石墨烯的结构特性及作为吸水树脂改性剂的特点;第二部分主要综述了氧化石墨烯改性吸水树脂的主要聚合工艺;第三部分主要介绍了氧化石墨烯对吸水树脂微观结构和宏观性能的影响;最后,介绍了氧化石墨烯改性吸水树脂在废水处理、缓解“热岛效应”、柔性器件及医用材料等领域的应用,并分析了其存在的问题,为后续开展氧化石墨烯改性吸水树脂的相关研究及应用提供了参考。 相似文献
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环境响应型吸水树脂面对外界刺激时能够快速产生响应,物理结构和溶胀性能迅速发生变化,有望应用于人造肌肉、药物控释载体、吸附分离、细粒煤脱水等领域。随着科学技术的进步,对其结构与性能提出了新的要求和用途,研究者在制备方法和改性研究方面也取得了新的成果。本文综述了近几年来环境响应型吸水树脂的研究进展,简述了环境响应型吸水树脂的结构与性质,重点介绍了4类不同响应类型(温度、pH、盐及磁响应)吸水树脂的响应机理、研究水平及应用现状,最后讨论了环境响应型吸水树脂在面向应用的研究过程中要解决的关键科学问题,提出制备具有多重响应机制并兼顾刺激响应特性与机械性能的吸水树脂可加快其由实验室基础研究向实际工业应用过渡和成果转化的进程。 相似文献
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The effect of acid activation and thermal treatment of attapulgite on water absorbency of superabsorbent composite were investigated. Under the same preparation conditions, superabsorbent composite prepared with natural attapulgite exhibited a water absorbency of 639 g/g and it merely kept 71% of its initial water absorbency after 5 times of swelling–deswelling–reswelling test. However, superabsorbent composites prepared with 2–10 M hydrochloric acid acidified attapulgite and 100–400°C thermal treated attapulgite respectively exhibited the water absorbency of 884–1,241 g/g and 701–1,515 g/g. Also, those superabsorbent composites can keep 87% and 85% of their initial water absorbency after 5 times of swelling–deswelling–reswelling test, respectively. These results showed that, compared with superabsorbent composite prepared with natural attapulgite, the comprehensive water‐absorbing properties of poly(acrylic acid)/ attapulgite superabsorbent composites were improved effectively by acid activation and thermal treatment of attapulgite. This improvement of water absorbencies and gel strength of superabsorbent composite may be due to synthetical factors such as changes in the crystalline structure and the specific surface area and improvement of the number and the activity of hydroxyl groups of attapulgite, which in turn influence the grafting efficiency of monomer, crosslinking density, and the structure of superabsorbent composite network. POLYM. COMPOS., 28:397–404, 2007. © 2007 Society of Plastics Engineers 相似文献
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A novel salt‐resistant superabsorbent polymer was synthesized by solution polymerization from the monomer acrylic acid (AA) with potassium persulfate as the initiator. Sodium tungstate was first employed as a crosslinker in the preparation to achieve a better crosslinked polymer (WPAA). In addition to the xerogel WPAA, sodium hydroxide and tris(2‐hydroxyethyl)amine (TEA) were introduced for the preparation of WPAA–sodium and WPAA–TEA hydrogels, respectively. The effect on the water absorbency of factors such as the reaction temperature, degree of neutralization of AA, and amounts of the crosslinker sodium tungstate and the initiator were investigated. The crosslinked xerogels were characterized with infrared spectroscopy. These crosslinked superabsorbent composites with sodium tungstate were characterized with thermogravimetric analysis and scanning electron microscopy. The water absorbencies of these superabsorbent composites in water and saline solutions were investigated. Results obtained from this study showed that under the same synthesis conditions, in comparison with superabsorbent composites with an aluminum salt as a crosslinker and styrene as a graft copolymer, the salt resistance of the superabsorbent composite synthesized with sodium tungstate as a crosslinker was obviously enhanced. Moreover, the WPAA–TEA xerogel had absorbency values of 223.6 and 81.9 g/g for distilled water and a 0.9 wt % NaCl solution, respectively, and it showed better salt resistance and a better water‐absorbing rate than the WPAA–sodium xerogel because of the modification with triethanolamine. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 相似文献
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介绍了高吸水纤维的国内外研究现状、分类及其制备方法和主要用途,概述了高吸水纤维的发展前景,并提出了一种采用低温水溶性聚乙烯醇纤维来制备高吸水纤维的设想。 相似文献