微晶白云母/聚丙烯酸钠超强吸水性复合材料制备研究

以微晶白云母的超细粉体与丙烯酸为主要原料，采用溶液聚合法制备微晶白云母／聚丙烯酸钠超强吸水性复合材料，优化该复合材料吸自来水性能的配方，即中和度100％，丙烯酰胺用量30％，交联荆用量0．04％，白云母用量60％，引发荆用量0．40％；在此配方下制备的复合材料．吸蒸馏水倍率为420g／g，吸自来水倍率为220g／g，吸生理盐水倍率为55g／g。XRD、SEM分析表明，白云母在复合过程中没有发生结构的变化，在复合材料中均匀分散。同时，该复合材料具有反应便于控制且不粘容器、抗盐性能好、凝胶强度高，特别是白云母可添加60％，丙烯酰胺用量30％，使成本大幅降低。该产品可广泛应用于农林因艺、生态环境治理等领域作保水剂。

STUDY ON THE PREPARATION OF SUPERABSORBENT COMPOSITE OF MICROCRYSTALLINE MUSCOVITE/ POLYACRYLIC ACID NATRIUM

The superabsorbent composite of microcrystalline muscovite/polyacrylic acid natrium has been successfully synthesized by the method of liquid polymerization from superfine powders of microcrystalline muscovite and polyacrylic acid. The optimal recipe with 100% of neutralization extent, 300/oo of acrylamide, 0. 044 % of cross linker, 60 % of microcrystalline muscovite, and 0.40% of reaction initiator was gained, and the composite materials have the absorbency of 420 g/g for distilled water, 220 g/g for tap water, and 55 g/g for physiological brine, respectively. XED and SEM analysis indicated that the muscovite distributed homogeneously without structural changes during synthesis process ,and it is prone to the implement. The product has excellent salt-resistance, gel intension, and low cost due to the amount of muscovite up to 60% and acrylamide to 30%. This composite has a promising application as water retention agent in the area of farming, gardening and ecotope fathering.