高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (1): 139.

• 研究论文 • 上一篇    下一篇

κ-型卡拉胶/聚乙烯吡咯烷酮共混水凝胶的辐射制备及性质研究

翟茂林1, 哈鸿飞1, 吉井文男2, 幕内惠三2   

  1. 1. 北京大学技术物理系, 北京100871;
    2. 日本原子力研究所高崎所
  • 收稿日期:1999-09-08 出版日期:2001-01-24 发布日期:2001-01-24
  • 通讯作者: 翟茂林(1967年出生),男,博士,讲师,主要从事高分子辐射化学研究.
  • 基金资助:

    国际原子能机构协作项目(IAEA)

Studies on Radiation Preparation and Characteristics of κ-Carrageenan/PVP Blend Hydrogel

ZHAI Mao-Lin1, HA Hong-Fei1, YOSHII Fumio2, MAKUUCHI Keizo2   

  1. 1. Department of Technical Physics, Peking University, Beijing 100871, China;
    2. Takasaki Radiation Chemistry Research Establishment, JAERI
  • Received:1999-09-08 Online:2001-01-24 Published:2001-01-24

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摘要： 采用辐射技术制备了κ-型卡拉胶(KC)/聚乙烯基吡咯烷酮(PVP)共混水凝胶,研究了共混凝胶内KC含量、PVP的分子量和辐照剂量等对KC/PVP共混水凝胶性质的影响.实验发现,KC与高分子量的PVP(k-90)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含量的增加,凝胶强度及溶胀性能均显著提高.分析表明,KC与高分子量的PVP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.

关键词: 共混水凝胶, 凝胶强度, 溶胀行为, 辐射制备

Abstract: In this work, a series of hydrogels in the form of rod were prepared from κ-carrageenan(KC) and poly(N-vinyl pyrrolidone)(PVP) by gamma radiation with 60Co γ source at room temperature. The properties of the prepared hydrogels, such as the gel strength, gel fraction and swelling behavior were investigated. High molecular weight PVP(k-90) blending with KCcould produces excellent hydrogels, but low molecular weight PVP(k-30) dosen't. With increasing KCcontent in the prepared hydrogel, both the gel strength and the equilibrium degree of swelling were improved. The experimental analyses showed that the crosslinking reaction of PVP(k-90) was quicker than the degradation of KCat low dose(less than 30 kGy), and the degradation of KCwas inhibited in PVP/KCmixture system. An interpenetrating polymer network(IPN) hydrogel composed of PVP(a chemically crosslinked network) and KC (a physically crosslinked network) was proposed. In addition, the dose influenced greatly the preparation of the hydrogel.

Key words: Blend hydrogel, Gel strength, Swelling behavior, Radiation preparation

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