新式的生物降解材料聚乳酸有什么特点? - 常见问题

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新式的生物降解材料聚乳酸有什么特点?

新式的生物降解材料聚乳酸有什么特点?

来源网址:http://www.rsoau.com 2019-03-07 13:02:48    

聚乳酸(PLA)是一种新式的生物降解资料,运用可再生的植物资源(如玉米)所提出的淀粉质料制成。淀粉质料经由发酵进程制成乳酸,再经过化学组成转换成聚乳酸。
Polylactic acid (PLA) is a new type of biodegradable material, which is made from starch material proposed by renewable plant resources such as corn. Starch material is fermented into lactic acid and then converted into polylactic acid by chemical composition.
其具有杰出的生物可降解性,运用后能被自然界中微生物彻底降解,比较终生成二氧化碳和水,不污染环境,这对保护环境十分有利,是公认的环境友好资料。
It has excellent biodegradability, can be completely degraded by microorganisms in nature after use, and eventually generate carbon dioxide and water, which does not pollute the environment. This is very beneficial to the protection of the environment, and is recognized as environmentally friendly information.
但是,工业实践生产聚乳酸的工艺流程却比化学反应式复杂的多:如何添加聚乳酸的分子量,以取得更优异的物理功能是聚乳酸塑料生产商一起面临的问题。
However, the process of industrial production of polylactic acid is much more complicated than chemical reaction. How to add molecular weight of polylactic acid to obtain better physical function is a problem faced by polylactic acid plastics manufacturers.
其间,采用两步法制备聚乳酸,这一办法的中心是使乳酸生成环状二聚体丙交酯,再开环缩聚成聚乳酸。
In the meantime, polylactic acid was prepared by two-step method. The center of this method is to make lactic acid produce cyclic dimer lactide, and then open-loop polycondensation to polylactic acid.
主要进程是质料经微生物发酵制得乳酸后,再经过精制、脱水低聚、高温裂解,比较终聚组成聚乳酸。在真空下运用溶剂使聚乳酸直接脱水缩聚方面进行了大量的研究,但目前尚没有产业化。
The main process is that the material is fermented by microorganisms to produce lactic acid, then refined, dehydrated and oligomerized, pyrolysis at high temperature, and finally polylactic acid is formed. A lot of research has been done on the direct dehydration and condensation of polylactic acid by solvent in vacuum, but there is no industrialization at present.
聚乳酸有杰出的防潮、耐油脂和密闭性,在常温下功能稳定,但在温度高于55℃或富氧及微生物的效果下会自动降解。聚乳酸的降解分成两个阶段:1)首先是纯化学水解成乳酸单体;2)乳酸单体在微生物的效果下降解成二氧化碳和水。聚乳酸制成的食品杯只需60天就可以彻底降解,真正到达生态和经济两层效应。
Polylactic acid (PLA) has excellent moisture-proof, grease-resistant and airtight properties. It has stable function at room temperature, but can degrade automatically when the temperature is higher than 55 C or under the effect of oxygen-enriched and microorganisms. The degradation of polylactic acid can be divided into two stages: 1) the hydrolysis of lactic acid monomer by purifying chemistry; 2) the degradation of lactic acid monomer into carbon dioxide and water in microorganisms. Food cups made of polylactic acid can be completely degraded in only 60 days, reaching the ecological and economic effects.
化石基生物降解塑料:主导产品为PBAT与PBS石油基生物降解塑料是指以石化产业链中所生产的单体经过聚合所制造的可生物降解塑料。这类塑料目前主要包含聚丁二酸丁二醇酯(PBS)/聚丁二酸-己二酸丁二醇酯(PBSA),聚已内酯(PCL)和聚丁二醇丁二酸-对苯二酸盐(PBAT)等。
Fossil-based biodegradable plastics: PBAT and PBS petroleum-based biodegradable plastics are biodegradable plastics produced by polymerization of monomers produced in the petrochemical industry chain. At present, these plastics mainly include polybutylene succinate (PBS)/polybutylene succinate-adipate (PBSA), polycaprolactone (PCL) and polybutylene succinate-terephthalate (PBAT).
以上信息是我们可降解颗粒整理发布希望对大家有所帮助我们的网站是:http://www.rsoau.com
The above information is our degradable particle sorting release hope to help you with our website is: http://www.rsoau.com!

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