PEG/PVA/PAA复合高吸水性树脂的制备及其保水性能

Preparation and Water Retention of PEG/PVA/PAA Superabsorbents

摘要:

以聚乙二醇（PEG）、部分中和的丙烯酸（AA）和聚乙烯醇（PVA）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，采用水溶液聚合法制备具有互传网络结构的PEG/PVA/PAA高吸水树脂。应用FTIR、XRD、TG和SEM对产物的结构和性能进行了表征和测试，并探讨了PEG、PVA用量、丙烯酸中和度、反应温度对产品吸水性能的影响。结果表明：在丙烯酸的中和度为75%，聚合温度为75℃，引发剂的质量分数为1.1%，交联剂的质量分数为0.3%，PEG的质量分数为10%，PVA的质量分数为15%时，制得高吸水性树脂吸蒸馏水能力最高可达935g/g，吸盐水倍率可达91g/g且具有良好的保水性能。

Abstract:

In this paper, poly(ethylene glycol)/poly(vinyl alcohol)/poly(acrylic acid) superabsorbent resin was prepared by solution polymerization using poly(ethylene glycol) (PEG), part of neutral acrylic acid(AA) and poly(vinyl alcohol) (PVA) as raw materials. N, N-methylenebisacrylamide and ammonium persulfate were used as crosslinker and initiator, respectively. The structures and performance of composite resin were studied by FTIR, XRD, TG and SEM. The effects of PVA content, PEG content, acrylic acid neutralization degree, reaction temperature on product water-absorbing performance were evaluated. The results showed that the neutralization degree of acrylic acid was 75%, the polymerization temperature was 75℃, the mass fraction of initiator was 1.1%, the mass fraction of cross-linker was 0.3%, the mass fraction of PEG was 10% and the mass fraction of PVA was 15%, the maximum distilled water absorption ability of superabsorbent resin was 935 g/g, salt water absorption rate reached up to 91 g/g燼nd has good water retention performance.