化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (4) : 235-238.

开发与应用

膨润土复合甲基丙烯酸高强度吸水剂的制备及性能表征

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Preparation and characterization of super strength water absorbent based bentonite and poly(methylacrylic acid)

Ma Chuang¹, Zhang Hengqiang¹, Wang Qiurong², Li Nannan¹

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摘要

以膨润土和甲基丙烯酸为原料,N′N-亚甲基双丙烯酰胺为交联剂,过硫酸铵为引发剂,采用溶液聚合法制备了膨润土复合甲基丙烯酸聚合物高强度吸水剂,通过红外光谱对其结构进行了表征。研究了吸水剂中膨润土加入量、单体中和度、交联剂用量等对吸水性和强度的影响,并测试了吸水剂的吸水性能和压缩强度。结果表明,当膨润土用量为10%,氢氧化钠浓度为2mol/L,单体中和度为80%,交联剂用量为0.75%时,制备的吸水剂在室温下对蒸馏水吸水倍率达382g/g,对自来水吸水倍率可达216g/g;地0.9%的Na₂SO₄溶液中吸水倍率为76g/g,压缩强度为16.73MPa,说明制备的吸水剂具有较好的强度和吸水性能。

Abstract

The super strength water absorbent based bentonite and poly(methylacrylic acid) composite was prepared with N′N-methylenebisacrylamide used as the crosslinker,ammonium persulfate as the initiator by solution polymerization,characterized by FTIR.And the effects of the dosage of bentonite,the neutralization degree of monomer,the dosage of cross-linker etc.on water absorption and compress strength were investigated.The results showed that the absorbency was 382g/g for distill water,216g/g for tap water,76g/g for 0.9%(wt) of Na₂SO₄,the compressive strength was 16.73MPa of composite when the concentration of NaOH was 2moL/L,the neutralization degree of monomer was 80%,the dosage of crosslinker was 0.75% of monomer.

关键词

膨润土 / 甲基丙烯酸 / 吸水剂 / 压缩强度

Key words

bentonite / methyl acrylic acid / water absorbent / compressive strength

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膨润土复合甲基丙烯酸高强度吸水剂的制备及性能表征[J]. 化工新型材料, 2019, 47(4): 235-238 DOI:

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