紫外辐射固化法制备可生物降解高吸水性树脂及其性能的研究

Preparation of Degradable Superabsorbent via Ultraviolet Radiation Curing and Its Properties

以N,N′-亚甲基双丙烯酰胺(NMBA)为交联剂,2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、丙烯酰胺(AM)、壳聚糖(CTs)为单体,采用紫外辐射固化法,在无任何气氛保护和不加引发剂的条件下,合成了高吸水性CTs/AM/AMPS树脂。利用FTIR和TG等方法分析了该树脂的化学结构,并考察了合成条件对其吸水性能的影响。实验结果表明,适宜的合成条件(w:基于反应体系的质量)为:n(AM)∶n(AMPS)=5∶1、CTs用量3.00%(w)、NMBA用量0.54%(w)、体系pH=2.5、3种单体总用量8.85%(w)、固化时间9 min。在此条件下合成的CTs/AM/AMPS树脂的最大吸水倍率为1 615 g/g。CTs在受热过程中由于网格被破坏而发生降解,因此CTs/AM/AMPS树脂为环保型可生物降解树脂。

A superabsorbent resin CTs/AM/AMPS was prepared with N,N＇-methylene-bisacrylmide（NMBA） as crosslinking agent,and chitosan（CTs）,2-acrylamido-2-methylpropanesulfonic acid（AMPS） and acrylamide（AM） as monomers via ultraviolet radiation curing without inert gas protection and any initiator.It was characterized by means of FTIR and TG.The effects of reaction conditions on the water absorbency of the resin were investigated.The results showed that under the optimum synthetic conditions of n（AM） ∶ n（AMPS） 5 ∶ 1,w（CTs） 3.00％,w（NMBA） 0.54％,pH 2.5,w（AM＋AMPS＋CTs） 8.85％ and curing time 9 min,the absorbency of the prepared CTs/AM/AMPS resin reached 1 615 g/g.Due to the destruction of the network structure of CTs in drying process,the CTs/AM/AMPS resin was environmentally friendly and biodegradable.