Key Laboratory of Oil and Gas Fine Chemicals, Educational Ministry of China, School of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China.
Carbohydr Polym. 2014 Jan 30;101:231-9. doi: 10.1016/j.carbpol.2013.09.054. Epub 2013 Oct 10.
A novel biodegradable superabsorbent polymer has been prepared from maleylated cotton stalk cellulose (MCSC) crosslinker and acrylic acid (AA) by ultraviolet (UV) photopolymerization in aqueous solution at room temperature, and irgacure 651 as a photoinitiator. The resulting superabsorbent was characterized by FT-IR, (1)H NMR, SEM and TGA. The effects of preparation conditions such as degree of substitution (DS), amount of maleylated cotton stalk cellulose, exposed time, photoinitiator amount and monomer concentration on the water absorbency and the monomer conversion in graft were evaluated. The swelling kinetics, salt-resistance, water retention capacity and biodegradability of the MCSC-g-PAA superabsorbent were investigated. It was found that, the obtained superabsorbent have good swelling degree that greatly affected by its composition and preparation conditions. Owing to its considerable good water retention capacity, being economical and environment-friendly, it might be useful for its application in agriculture field.
一种新型的可生物降解的高吸水性聚合物已经由马来酸化棉秆纤维素（MCSC）交联剂和丙烯酸（AA）通过在室温下的水溶液中的紫外（UV）光聚合，以及作为光引发剂的 Irgacure 651 制备得到。所得到的高吸水性聚合物通过傅里叶变换红外光谱（FT-IR）、（1）H 核磁共振（NMR）、扫描电子显微镜（SEM）和热重分析（TGA）进行了表征。评估了制备条件，如取代度（DS）、马来酸化棉秆纤维素的用量、暴露时间、光引发剂用量和单体浓度对接枝中的吸水量和单体转化率的影响。研究了 MCSC-g-PAA 高吸水性聚合物的溶胀动力学、耐盐性、保水能力和可生物降解性。结果发现，所得到的高吸水性聚合物具有良好的溶胀程度，这受到其组成和制备条件的极大影响。由于其具有相当好的保水能力，经济环保，可能在农业领域有应用价值。
