哈密瓜（简称密瓜）在食用后,会产生许多的瓜皮废弃物,处理不当会对环境造成污染。本文以密瓜皮为原料、丙烯酸为单体,加入改性坡缕石,采用溶液聚合法制备密瓜皮高吸水树脂,研究了不同因素对其吸水性能的影响,并对最佳制备条件下的吸水树脂进行红外、扫描电镜表征测定。结果表明：当密瓜皮与丙烯酸质量比为 9:100、中和度为 80%、改性坡缕石含量为 9% 、交联剂含量为 0.30% 、引发剂含量为 1.2% 时,高吸水树脂在蒸馏水、自来水、 0.9%NaCl 溶液中均分别达到最大溶胀率;当密瓜皮高吸水树脂粒径为 0.425~0.850mm 时,测得其在溶胀平衡时树脂溶胀率分别高达 50.4、43.2、37.5g/g ,且温度保持在 25℃ 时,高吸水树脂维持 75.6% 的保水率。可见,其具有优异的吸水能力,适配多场景应用需求。

After honeydew melon is consumed,a large amount of peel waste is produced,which will cause environmental pollution if not handled properly.In this study,a superabsorbent resin was prepared from honeydew melon peel as raw material,acrylic acid as monomer,and modified palygorskite using solution polymerization method.The effects of different factors on its water absorption performance were investigated. The superabsorbent resin under the optimal preparation conditions was also characterized by Fourier transform infrared spectroscopy（FT-IR）and scanning electron microscopy（SEM）.The results showed that when the mass ratio of honeydew melon peel to acrylic acid was 9:100 ,the neutralization degree was 80% , the content of modified palygorskite was 9% ,the content of cross-linking agent was 0.30% ,and the content of initiator was 1.2% ,the superabsorbent resin exhibited the maximum swelling ratio in distilled water,tap water and 0.9%NaCl solution.When the particle size of the superabsorbent resin was 0.425~0.850 mm,its swelling ratios at swelling equilibrium in the above three solutions were 50.4,43.2,and 37.5g/g,respectively.When the temperature was maintained at 25℃,the superabsorbent resin retained a water retention rate of 75.6%. These results indicate that the resin has excellent water absorption capacity and is suitable for various application scenarios.