A new microcrystal muscovite composite superabsorbent was synthesized by UV photopolymerization using 2-hydroxy-2-methylpropiophenone（1 173） as photoinitiator,N,N-methylene bisacrylamide（MBA） as crosslinker,acryli...A new microcrystal muscovite composite superabsorbent was synthesized by UV photopolymerization using 2-hydroxy-2-methylpropiophenone（1 173） as photoinitiator,N,N-methylene bisacrylamide（MBA） as crosslinker,acrylic acid（AA）,acrylamide（AM） and sodium 4-styrenesulfonate（SSS） as comonomers.Factors affecting water and salt absorption of the microcrystal muscovite composite superabsorbent,such as crosslinker amount,microcrystal muscovite concentration,photoinitiator content,and SSS concentration,were systematically studied.Water retention capacity of the composite superabsorbent was also investigated.The results show that microcrystal muscovite composite superabsorbent has water absorbency of 550 g/g,salt absorbency of 62 g/g,and water retention of 60% after heating at 70 ℃ for 40 h.The microcrystal muscovite is physically combined into the polymeric network without destroying its polycrystalline structure and the surface of the microcrystal muscovite composite superabsorbent has some deep and small holes.展开更多
建筑信息模型(building information modeling,BIM)与大数据集成应用为项目智慧化管理提供新方法,该领域近年来深受中外学者关注。为了更全面了解该领域的研究情况,以Web of Science数据库研究类文献及中国知网数据库期刊文献作为数据来...建筑信息模型(building information modeling,BIM)与大数据集成应用为项目智慧化管理提供新方法,该领域近年来深受中外学者关注。为了更全面了解该领域的研究情况,以Web of Science数据库研究类文献及中国知网数据库期刊文献作为数据来源,运用文献计量可视化方法,以Citespace、Ucinet软件为分析工具,梳理2014—2019年期间发表的文献,绘制可视化知识图谱,从研究热点、研究演进趋势两个方面进行分析。结果表明:中外“BIM+大数据”集成研究各有所侧重点,以智能管理和智慧决策为目标,深度集成物联网、云计算、人工智能等新兴技术,服务于智慧城市建设与智慧建造的发展是未来研究趋势。展开更多
基金Funded by Sichuan Provincial Science&Technology Pillar Program,China(Nos.2010GZ0128,2014GZX0010)Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,China(No.SKLGP2012K004)the Sichuan Youth Science and Technology Innovation Research Team Funding Scheme,China(No.2013TD0005)
文摘A new microcrystal muscovite composite superabsorbent was synthesized by UV photopolymerization using 2-hydroxy-2-methylpropiophenone（1 173） as photoinitiator,N,N-methylene bisacrylamide（MBA） as crosslinker,acrylic acid（AA）,acrylamide（AM） and sodium 4-styrenesulfonate（SSS） as comonomers.Factors affecting water and salt absorption of the microcrystal muscovite composite superabsorbent,such as crosslinker amount,microcrystal muscovite concentration,photoinitiator content,and SSS concentration,were systematically studied.Water retention capacity of the composite superabsorbent was also investigated.The results show that microcrystal muscovite composite superabsorbent has water absorbency of 550 g/g,salt absorbency of 62 g/g,and water retention of 60% after heating at 70 ℃ for 40 h.The microcrystal muscovite is physically combined into the polymeric network without destroying its polycrystalline structure and the surface of the microcrystal muscovite composite superabsorbent has some deep and small holes.
文摘建筑信息模型(building information modeling,BIM)与大数据集成应用为项目智慧化管理提供新方法,该领域近年来深受中外学者关注。为了更全面了解该领域的研究情况,以Web of Science数据库研究类文献及中国知网数据库期刊文献作为数据来源,运用文献计量可视化方法,以Citespace、Ucinet软件为分析工具,梳理2014—2019年期间发表的文献,绘制可视化知识图谱,从研究热点、研究演进趋势两个方面进行分析。结果表明:中外“BIM+大数据”集成研究各有所侧重点,以智能管理和智慧决策为目标,深度集成物联网、云计算、人工智能等新兴技术,服务于智慧城市建设与智慧建造的发展是未来研究趋势。
