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

doi:10.7506/spkx1002-6630-201021036

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

• Basic Research • Previous Articles Next Articles

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

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

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

Abstract

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

CLC Number:

LI Kai1,2，ZHOU Mei-cun1，ZHANG Hong1,*，ZHENG Hua1. Solubility and Physico-chemical Properties of Lac Resin and Its Sodium Salt[J]. FOOD SCIENCE, 2010, 31(21): 159-164.

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

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