食品科学 ›› 2010, Vol. 31 ›› Issue (21): 159-164.doi: 10.7506/spkx1002-6630-201021036

• 基础研究 • 上一篇    下一篇

紫胶树脂溶解性及其钠盐理化性质

李 凯1,2,周梅村2,张 弘1,*,郑 华1   

  1. 1.中国林业科学研究院资源昆虫研究所
    2. 昆明理工大学化学工程学院
  • 收稿日期:2010-08-24 修回日期:2010-10-22 出版日期:2010-11-15 发布日期:2010-12-29
  • 通讯作者: 张弘 E-mail:kmzhhong@163.com
  • 基金资助:

    国家林业局“948”项目(2008-4-78);科技部农业科技成果转化资金项目(2010GB24320619);
    国家林业科技成果推广项目([2010]11)

Solubility and Physico-chemical Properties of Lac Resin and Its Sodium Salt

LI Kai1,2,ZHOU Mei-cun1,ZHANG Hong1,*,ZHENG Hua1   

  1. 1. Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, China;
    2. Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650224, China
  • Received:2010-08-24 Revised:2010-10-22 Online:2010-11-15 Published:2010-12-29
  • Contact: Zhang Hong E-mail:kmzhhong@163.com

摘要:

紫胶树脂在碳酸钠溶液中的溶解是紫胶加工、改性和应用过程中必不可少的前工序,通过测定在不同碳酸钠浓度、不同温度条件下溶解过程中紫胶树脂溶解量的变化以及与溶液pH 值和TDS 值(total dissolved solids,溶解性总固体量又称可溶性固体含量)的变化关系,建立紫胶树脂溶解曲线,并对其溶解原理以及溶解初期的动力学进行探讨;对紫胶树脂钠盐和紫胶树脂的理化性质进行测定和对比,并考察紫胶树脂盐作为独立生物材料的可能性。结果表明:紫胶树脂在碳酸钠溶液中的溶解过程也是酸碱反应的过程,是- COOH 和CO32- 之间的反应;对紫胶树脂的溶解前期进行的动力学分析,证明其为零级反应。比较紫胶树脂钠盐膜与紫胶树脂膜的理化性质表明,紫胶树脂钠盐较紫胶树脂有更好的耐热性、更强的硬度、更好的润湿性并且在模拟胃液pH1.0、肠液pH6.8 等液体环境中有更佳的溶解性。

关键词: 紫胶树脂, 碳酸钠, 溶解性, 生物材料

Abstract:

The dissolution of lac resin in sodium carbonate, a necessary processing before the production, modification and application of lac resin, was done. The change of solubility, pH and total dissolved solids (TDS) of lac resin in sodium carbonate with different concentrations and temperatures were determined to establish a solubility curve of lac resin for exploring its dissolving principle and dynamic model. Meanwhile, the physiochemical properties of lac resin and its sodium salt were determined and compared to test the possibility of being used as a single material. Results indicated that the dissolving process of lac resin in sodium carbonate was an acid-base reaction in a zero grade mode. Sodium salt of lac resin based film with exhibited better thermostability, hardness, wettability, and excellent solubility in mimic gastric liquid (pH 1.0) or mimic intestinal liquid (pH 6.8) when compared to lac resin based film.

Key words: lac resin, sodium carbonate, solubility, biomaterials

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