Preparation of absorbent resin based on wheat straw/modified bentonite
Preparation of absorbent resin based on wheat straw/modified bentonite
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发表时间：
2012
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通讯作者：
Wang Yan
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作者：
Wang Yan
为了提高高吸水性树脂(SAR)的吸水率、耐盐性和反复吸水后的凝胶强度，以麦草(WS)、改性膨润土(AM)、丙烯酸(AA)和丙烯酰胺(AM)为原料，通过溶液聚合制备了一种新型高吸水性树脂。考察了交联剂和引发剂的用量、单体质量比、AA的中和度、WS和改性膨润土的用量。结果表明：改性膨润土在蒸馏水中的最佳吸水率为195.7 g·g-1，在0.9wt%NaC l溶液中为24.2g·g-1；与未加改性膨润土的SAR相比，含改性膨润土的SAR在吸水率、重复吸水和重复吸水后的凝胶强度等方面均有较大提高。
In order to improve the water absorption,salt resistance and gel strength after repeating absorbing of superabsorbent resin(SAR),a novel SAR was prepared by the solution polymerization of pretreatment wheat straw(WS),modified bentonite,acrylic acid(AA) and acrylamide(AM).The dosage of cross-linking agent and initator,mass ratio of monomer,neutralization degree of AA,the dosage of WS and modified bentonite were investigated,which could influence the water absorption capacity of SAR.FT-IR was conducted to characterize the structure of WS and SAR.The result was obtained as follows: the best water absorption capacity of SAR was 195.7 g·g-1 in distilled water and 24.2 g·g-1 in 0.9 wt % NaCl solution,respectively.Compared with the SAR without adding the modified bentonite,the SAR containing modified bentonite was much better in water absorption,repeating absorption and gel strength after repeating absorbing.