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Studies on Synthesis of the Enzymic Polymerized Urushi Liquid that has Natural Drying Property under a Low Humidity Environment

低湿环境下自然干燥的酶聚合漆液的合成研究

基本信息

批准号：
13680181
负责人：
MIYAKOSHI Tetsuo
金额：
$ 1.02万
依托单位：
Meiji University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

项目摘要

We conducted a basic experiment for the purpose of developing polymerized urushi that has a natural drying property in a low humidity environment, and examined the hardening process of the coating film with time as the urushi liquid dried by the enzymic oxidation using laccase in a constant temperature and humidity chamber. We postulated that the auto-oxidation of the side chain easily occurs in the urushi liquid due to the enzymic polymerization based on the change in the IR spectra during the drying process and anti-oxidation property of raw and sugurome urushi. And, as a result, the change in the progress time of the drying property and degree of polymerization of the urushi coating film and liquid thin phase were measured. The molecular weight distribution of the urushiol in the time that naturally dries in a low humidity environment was admitted that the monomer component decreased to 27% or less. Raw urushi undergoes enzymic oxidation by repetitive "Kurome" and decreases the urushiol monomer. Also, in this reaction, we developed a relation formula because there is a correlation in the changes, it was determined that the hydroxy value and anti-oxidization power decrease and the anti-oxidation of the side chain more easily occurs.

为了研制在低湿度环境下具有自然干燥性能的聚合漆膜，进行了基础实验，考察了漆酶在恒温恒湿条件下进行酶氧化干燥后，漆膜随时间的硬化过程。根据干燥过程中红外光谱的变化和乌鲁士原液的抗氧化性能推测，乌鲁士溶液中的侧链容易发生酶聚合反应而发生自氧化。并测定了乌鲁士涂膜和液体稀相的干燥性能和聚合度随时间的变化。通过测定漆酚在低湿度环境中自然干燥时间的相对分子质量分布，发现漆酚的单体组分降低到27%以下。生漆经历了重复的“黑酶”的酶氧化，减少了漆酚单体。另外，在这个反应中，我们建立了关系式，因为在变化中存在相关性，确定了羟值和抗氧化力降低，侧链的抗氧化更容易发生。