【摘要】 以纳米膨润土、丙烯酸和羧甲基纤维素为原料,N,N’-亚甲基双丙烯酰胺为交联剂,聚乙烯醇(PEG)为成孔剂制备了一种新型多孔网络凝胶。通过红外光谱(FT-IR)、X射线衍射(XRD)和扫描电镜(SEM)对凝胶结构进行了表征。研究了交联剂、引发剂用量和成孔剂的加入对凝胶的溶胀性能的影响。结果表明:交联剂量为0.04wt%,引发剂量为1.5~2.0wt%时多孔凝胶的溶胀性能最佳。在蒸馏水中和0.9wt%NaCl溶液中的溶胀率分别1125g/g和123g/g。成孔剂PEG的加入能使凝胶的溶胀率和溶胀速率明显提高。更多还原

【Abstract】 A series of novel porous hydrogels of cross-linked networks based on acrylic acid,carboxymethylcellulose and bentonite were prepared by using N,N’-methylenebisacrylamide as crosslinker and polyethylene glycol(PEG)as poreforming agent.The structures of hydrogels were characterized by X-ray diffraction(XRD),fourier transform infrared(FTIR)and scanning electron microscope(SEM).The influences of initiator amount,crosslinker amount and the pore-forming agent on swelling properties were investigated.The results showed that optimal preparation conditions were initiator 1.5-2.0wt%,crosslinker 0.04wt%.The highest swelling capacity of hydrogels in distilled water and 0.9wt% NaCl were about 1125g/g and 123g/g,respectively.The presence of pore-forming agent could remarkably increase the swelling capacity and swelling rate of hydrogels.更多还原