Preparation and characterization of cellulose-supported HEMA hydrogels
Preparation and characterization of cellulose-supported HEMA hydrogels
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DOI：
10.1016/s0032-3861(96)01075-0
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发表时间：
1997-09
期刊：
影响因子：
4.6
通讯作者：
J. Karlsson;P. Gatenholm
中科院分区：
文献类型：
--
作者：
J. Karlsson;P. Gatenholm
采用臭氧诱导接枝聚合的方法制备了纤维素纤维支撑的HEMA水凝胶。研究了臭氧处理过程中各种工艺参数对纤维素纤维上过氧化氢生成能力的影响。用加湿、饱和的臭氧/氧气混合物臭氧氧化水膨胀的纤维素纤维，可显著增加过氧化氢的生成。ESCA和AFM分析表明，过氧化氢后的纤维素引发了HEMA的接枝聚合，接枝聚合主要发生在纤维素孔中，表面未被完全覆盖。双官能团交联单体DEGDMA的加入不仅增加了附加物的量，而且“引导”了从孔到表面再到对称球体的接枝聚合过程。©1997爱思唯尔科学有限公司。
Cellulose fibre-supported hydrogels of HEMA were prepared by means of an ozone-induced graft polymerization process. The effect of various process parameters during ozone treatment on the ability to form hydroperoxides on the cellulose fibres was studied. Ozonation of water-swollen cellulose fibres with a humidified, saturated ozone/oxygen mixture resulted in a significant increase in hydroperoxide formation. The hydroperoxidized cellulose initiated graft polymerization of HEMA mostly in the pores of cellulose, leaving the surface incompletely covered, as detected by ESCA and AFM. The addition of a bifunctional crosslinking monomer, DEGDMA, not only increased the amount of add-on, but also ‘led-out’ the graft polymerization process from the pores onto the surface and then into the symmetrical spheres. © 1997 Elsevier Science Ltd.