辐射制备复合超级吸水材料及其抗紫外性能  

Radiation synthesis of a super absorbent polymer and its ultraviolet resistance property

作　　者：熊智 李玉龙 冯鑫鑫 张明星[2] 邢哲[2] 杨国恩[1] 李荣[2] 吴国忠[2,3] XIONG Zhi;LI Yulong;FENG Xinxin;ZHANG Mingxing;XING Zhe;YANG Guoen;LI Rong;WU Guozhong(Central South University of Forestry and Technology,Changsha 410004,China;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;ShanghaiTech University,Shanghai 200031,China)

机构地区：[1]中南林业科技大学,长沙410004 [2]中国科学院上海应用物理研究所,上海201800 [3]上海科技大学,上海200031

出　　处：《辐射研究与辐射工艺学报》2022年第4期30-37,共8页Journal of Radiation Research and Radiation Processing

基　　金：中国科学院上海应用物理研究所重大科技项目“辐射技术在生态环境和健康领域的若干前沿应用研究”资助。

摘　　要：本文采用γ射线辐照制备木质素磺酸钠(LS)和羧甲基纤维素钠(CMC)复合超级吸水材料。研究了不同吸收剂量、LS含量对LS/CMC超级吸水材料吸水性能和凝胶含量的影响规律,并分析了LS/CMC超级吸水材料的抗紫外辐照性能。通过扫描电镜(SEM)、傅里叶变换红外光谱(FTIR)和热失重分析(TGA)分别对LS/CMC超级吸水材料表面形貌、官能团结构和热分解行为进行了表征分析。最佳制备条件:在100 g水中添加20 g CMC、1 g LS,当吸收剂量为15 k Gy时,制备的LS/CMC超级吸水材料吸液倍率能达到316.1 g/g(去离子水)和97.1 g/g(0.9%NaCl溶液),表明添加LS有利于提高LS/CMC超级吸水材料的吸水性能;在365 nm紫外灯(功率6 W)照射15 d之后吸水倍率能达到276 g/g,而未添加LS的吸水倍率从259.3 g/g下降到176.7 g/g。添加LS能显著提高超级吸水材料的抗紫外辐照性能。A super absorbent polymer(SAP),sodium lignosulfonate(LS)/sodium carboxymethyl cellulose(CMC),was produced from LS and CMC through the irradiation ofγ-rays.The effects of the absorbed dose and LS dosage on the water absorption performance of the SAP were investigated.The ultraviolet(UV)resistance of the SAP was also evaluated.The surface morphology,chemical structures,and thermal weightlessness of the SAP were characterized using scanning electron microscopy,Fourier-transform infrared spectroscopy,and thermogravimetric analysis,respectively.The optimal conditions for preparing the SAP were as follows:20 g of CMC,1 g of LS,100 g of water,and 15 k Gy of absorbed dose.The water absorption capacities of the prepared SAP were 316.1 g/g and 97.1 g/g for deionized water and 0.9%NaCl solution,respectively.Therefore,the water absorption capacity improved with the addition of LS.Moreover,after irradiation with a 365-nm-wavelength UV lamp(16 W)for 15 d,the water absorption capacity(deionized water)of the LS1/CMC SAP was 276 g/g,while that of the LS0/CMC SAP decreased from 259.3 g/g to 176.7 g/g.Finally,the as-prepared SAP exhibited outstanding UV resistance.

关 键 词：木质素磺酸钠 羧甲基纤维素钠 辐射聚合 超级吸水材料 抗紫外 

分 类 号：TL13[核科学技术—核能科学] TQ352.79[化学工程]