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采用辐射技术合成了K 型卡拉胶 (KC) /聚乙烯吡咯烷酮 (PVP)共混水凝胶 ,研究了天然高分子KC、单体N 乙烯基吡咯烷酮 (N VP)、交联剂二甲基丙烯酸十四甘醇酯 ( 1 4G) ,辐照剂量以及剂量率等对辐射合成的KC/PVP共混水凝胶性质的影响 .实验发现 ,KC与适当比例的N VP共混后在一定剂量范围内辐照可得到高强度、高溶胀行为的KC/PVP共混水凝胶 ,随着共混凝胶内KC含量的相对增加 ,凝胶强度及溶胀性的能均显著提高 ,但合成该共混凝胶的最佳剂量却相对提前 ;加入 1 4G后降低了KC/PVP共混凝胶辐射合成最佳剂量 ,同时使KC/PVP共混凝胶的强度进一步提高 ;剂量、剂量率对KC/PVP共混凝胶的性质亦有很大的影响 .分析表明 ,KC与N VP共混后 ,在较低剂量下KC的降解被抑制 ,从而获得一种由物理交联的KC和化学交联的PVP形成的互穿网络 (IPN)凝胶
Radical technology was used to synthesize K-Carrageenan (KC) / polyvinylpyrrolidone (PVP) blend hydrogel. The effects of natural polymer KC, N-vinylpyrrolidone (N VP), cross-linking agent dimethacrylate (1 4G), radiation dose and dose rate on the properties of radiation-synthesized KC / PVP blend hydrogels were studied.It was found that when KC was blended with NVP at a proper ratio, KC / PVP blend hydrogel with high intensity and high swelling behavior can be obtained by internal irradiation. With the relative increase of KC content in the gel, the gel strength and swelling ability can be significantly increased. However, The optimal dose of the gel was relatively early; after adding 1 4G, the optimum dose of KC / PVP blend gel was reduced, and the strength of KC / PVP blend gel was further increased. The dose and dose rate of KC / PVP blend gel also has a great influence on the analysis of the results show that KC and N VP after blending, the degradation of KC at lower doses is inhibited, so as to obtain a physical cross-linking of KC and chemical cross Interpenetrating network (IPN) gel formed by PVP