摘要
采用黄原胶(XG)为基体,丙烯酸(AA)为接枝聚合单体,环己烷为连续相,过硫酸钾为引发剂,利用反相悬浮聚合法合成了XG-g-PAA高吸水性树脂。研究了丙烯酸与黄原胶质量比、引发剂(KPS)用量、交联剂(NMBA)用量、丙烯酸中和度和聚合反应温度等因素对树脂吸水率的影响。利用傅立叶变换红外光谱仪(FTIR)、扫描电镜(SEM)和热重分析仪(TGA)对产物进行了表征。结果表明,丙烯酸与黄原胶发生接枝共聚,在最佳工艺条件下制备的XG-g-PAA高吸水性树脂具有良好的吸水和抗盐性能,高温保水性能提高,对蒸馏水的吸水率为845 g.g-1,对质量分数0.9%的NaCl水溶液的吸水率为96.3 g.g-1,接枝率达126.5%,接枝效率达82.6%。
The xanthan gum-g-acrylic superabsorbent resin was prepared by the inverse polymerization using acrylic acid as a graft polymerization monomer,cyclohexane as the continuous phase,N,N-methylene-bis-acrylamide as the crosslinking agent and potassium persulfate as an initiator.The influence factors of the synthesising superabsorbent resin such as the weight ratio of acrylic acid and xanthan,amount of initiator（KPS）,amount of crosslinking agent,degree of neutralization of acrylic acid and polymerization temperature were investigated.Fourier transform infrared spectroscopy（FTIR）,scanning electron microscopy（SEM）,and thermogravimetric analyzer（TGA） were used for the characterization of the superabsorbent resin.The results showed that：the poly-acrylic acid molecules linked to the molecular chain of xanthan gum through the graft co-polymerization,the preparation of XG-g-PAA superabsorbent resin under the optimum conditions has good properties of water absorption and salt resistance and the retention performance was improved in the high temperature,the highest water absorption up to 845 g·g-1,mass fraction 0.9% NaCl solution up to 96.3 g·g-1,percentage of grafting up to 126.5% and grafting efficiency up to 82.6%.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2011年第1期39-44,共6页
Fine Chemicals
基金
陕西省科技计划项目(2008K06-15)
"十一五"国家科学技术支撑计划项目(2006BAD09B04)
陕西科技大学研究生创新基金资助项目~~
关键词
黄原胶
接枝共聚
反相悬浮聚合
高吸水性树脂
功能材料
xanthan gum
graft copolymerization
inverse suspension polymerization
superabsorbent resin
functional materials
