Microcrystal muscovite composite superabsorbents（MMCSA） were prepared by water solution polymerization using acrylic acid, acrylamide and itaconic acid as comonomers and microcrystal muscovite as an inorganic additi...Microcrystal muscovite composite superabsorbents（MMCSA） were prepared by water solution polymerization using acrylic acid, acrylamide and itaconic acid as comonomers and microcrystal muscovite as an inorganic additive. Properties, such as water absorbency, salt absorbency, gel strength, water retention capacity and structure of MMCSA characterized by SEM and XRD, were investigated. Water absorbency, salt absorbency, gel strength, water retention capacity and thermostability were enhanced by incorporation of suitable amount of microcrystal muscovite. Water absorption of MMCSA was rapid, requiring 24.55 min to reach 63% of equilibrium absorbency（1218 g/g）. Microcrystal muscovite was physically combined into the polymeric network without destroying its polycrystalline structure and microcrystal muscovite composite superabsorbent had some irregular, undulant, and small microporous holes with sheet-like microcrystal muscovite distributed in the polymeric matrix.展开更多
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
基金Funded by the Sichuan Provincial Science & Technology Pillar Program,China(2010GZ0128)the Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Cheng du University of Technology,China(SKLGP2012K004)
文摘Microcrystal muscovite composite superabsorbents（MMCSA） were prepared by water solution polymerization using acrylic acid, acrylamide and itaconic acid as comonomers and microcrystal muscovite as an inorganic additive. Properties, such as water absorbency, salt absorbency, gel strength, water retention capacity and structure of MMCSA characterized by SEM and XRD, were investigated. Water absorbency, salt absorbency, gel strength, water retention capacity and thermostability were enhanced by incorporation of suitable amount of microcrystal muscovite. Water absorption of MMCSA was rapid, requiring 24.55 min to reach 63% of equilibrium absorbency（1218 g/g）. Microcrystal muscovite was physically combined into the polymeric network without destroying its polycrystalline structure and microcrystal muscovite composite superabsorbent had some irregular, undulant, and small microporous holes with sheet-like microcrystal muscovite distributed in the polymeric matrix.
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.
