CAJ | 학술논문

采用反相悬浮聚合法,以(NH4)2S2O8-NaHSO3为引发剂,N,N’-亚甲基双丙烯酰胺(MBA)为初体交联剂,环氧氯丙烷(ECH)为表面交联剂,单体丙烯酸(AA)和丙烯酰胺(AM)与羧甲基纤维素钠(CMC)接枝共聚,制得含有阴离子亲水基团和非离子亲水基团的颗粒状高吸水性树脂,研究了表面交联剂的加入量及表面交联时间对树脂吸水性能、保水性能及使用寿命的影响.结果表明表面强化交联与单一交联的产品相比,具有更高的吸液率、吸液速率、脱水速率和使用寿命.通过表面强化交联,树脂的吸水能力可提高一倍以上.在优化的反应条件下,所得树脂在自来水中的吸水率为114 g?g?1,在1%NaCl盐水中的吸水率为69 g?g?1,吸收至半饱和量的时间小于15 s,吸收至饱和量只需1 min.吸水后的树脂无黏性、分散性好,具有一定的凝胶强度.
채용반상현부취합법,이(NH4)2S2O8-NaHSO3위인발제,N,N’-아갑기쌍병희선알(MBA)위초체교련제,배양록병완(ECH)위표면교련제,단체병희산(AA)화병희선알(AM)여최갑기섬유소납(CMC)접지공취,제득함유음리자친수기단화비리자친수기단적과립상고흡수성수지,연구료표면교련제적가입량급표면교련시간대수지흡수성능、보수성능급사용수명적영향.결과표명표면강화교련여단일교련적산품상비,구유경고적흡액솔、흡액속솔、탈수속솔화사용수명.통과표면강화교련,수지적흡수능력가제고일배이상.재우화적반응조건하,소득수지재자래수중적흡수솔위114 g?g?1,재1%NaCl염수중적흡수솔위69 g?g?1,흡수지반포화량적시간소우15 s,흡수지포화량지수1 min.흡수후적수지무점성、분산성호,구유일정적응효강도.
A kind of enhanced surface crosslinking super-absorbent polymer having anionic and non-ionic hydrophile groups was synthesized via graft copolymerization reaction of acrylic acid (AA)/acrylamide (AM) onto sodium carboxymethylcellulose (CMC) by means of inverse suspension polymerization in the presence of (NH4)2S2O8-NaHSO3 as initiator, N,N'-methylenebisacrylamide (MBA) as initial crosslinker and epichlorohydrin (ECH) as surface crosslinker. The influences of the amount and adding time of the surface crosslinker on water absorbency, water retention performance and service life were investigated in detail. Compared with single crosslinking product, the surface crosslinking product has higher absorbency, absorption rate, dehydration rate and longer service life. The results show that the absorbencies of the product synthesized under the optimal reaction conditions are 114 g?g?1 in tap water, 69 g?g?1 in 1% NaCl solution, respectively, and the half saturated time is less than 15 s. The product after absorption is dispersible, non-sticky with certain gel strength.