摘要
采用γ射线辐射法制备了聚乙烯醇(PVA)/聚乙烯基吡咯烷酮(PVP)/水溶性壳聚糖(ws-chitosan)共混水凝胶。研究了辐射剂量、ws-chitosan含量及增塑剂(聚乙二醇(PEG)或甘油)对水凝胶性能的影响。实验发现,随着辐射剂量的增大,凝胶分数增大,并在剂量大于27 kGy时达到饱和;ws-chitosan含量增大及加入增塑剂PEG或甘油后,水凝胶的凝胶分数和强度都会减小,而相应的溶胀度会显著增大。通过高级流变仪(ARES)对水凝胶弹性模量的测试显示,随吸收剂量的增加,凝胶强度会相应增大,但在27 kGy以上出现饱和。
Hydrogels containing poly（vinyl alcohol） （PVA）, poly（N-vinyl pyrrolidone） （PVP） and water soluble chitosan （ws-chitosan） have been prepared by gamma ray irradiation. The hydrogel properties were investigated in relation to the irradiation dose, the ws-chitosan content and the addition of plasticizers （poly（ethylene glycol） （PEG） or glycerol）. It is found that the gel fraction increases with increasing of the irradiation dose up to 27 kGy and then levels off with further irradiation. Increasing ws-chitosan content and the addition of plasticizers （PEG or glycerol） will reduce the gel fraction and strength of the hydrogels, while the swelling capacity is improved significandy. The storage modulus obtained from rheological measurements reveals that the strength of the hydrogels increases with increasing of the irradiation dose and saturates at doses above 27 kGy.
出处
《核技术》
EI
CAS
CSCD
北大核心
2007年第4期356-360,共5页
Nuclear Techniques
基金
中国科学院上海应用物理研究所<人才引进项目>(90120432)资助
关键词
水凝胶
增塑剂
流变性能
辐射合成
Hydrogel, Plasticizer, Rheological property, Radiation synthesis
