什么是可降解材料的原料? - 常见问题

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什么是可降解材料的原料?

什么是可降解材料的原料?

来源网址:http://www.rsoau.com 2019-02-28 16:04:25    

进入新世纪,越来越严峻的能源和环境的问题让人们意识到保护环境的严峻性,尤其是包装的资料用量巨大,世界各大城市都被白色废物所困扰了。

Entering the new century, more and more serious energy and environmental problems make people realize the seriousness of environmental protection, especially the huge amount of packaging information, the world's major cities are plagued by white waste.
因而,可降解塑料包装资料开发显得更为重要,世界各国在这一领域做了很多的工作,并获得可喜的效果。
Therefore, the development of packaging materials for degradable plastics is more important. Many countries in the world have done a lot of work in this field and achieved gratifying results.
生物降解资料的完成方法又有多种,如选用天然的成分加工;在树脂中参加淀粉等物质使资料能够被细菌分化 ;开发可水解聚合物等。
There are many ways to complete biodegradable data, such as using natural ingredients to process, taking part in starch and other substances in resin to make the data differentiated by bacteria, and developing hydrolyzable polymers.
组成高分子型降解塑料实际上就是化学组成生物降解塑料,这首要包括脂肪族聚酯类(PCL)、聚酰胺类、多糖共聚物、聚乳酸等,现已开宣布许多可生物降解的组成高分子资料,有聚乳酸(PLA)、聚乙烯醇(PVA)、聚己内酯(PCL)等聚合物。
Composition of biodegradable polymer plastics is actually chemical composition of biodegradable plastics, which mainly includes aliphatic polyesters (PCL), polyamides, polysaccharide copolymers, polylactic acid, etc. Many biodegradable polymer data have been announced, including polylactic acid (PLA), polyvinyl alcohol (PVA), polycaprolactone (PCL) and other polymers.
PLA由乳酸单体聚合而成,乳酸由特殊菌种将淀粉转化生成,PLA价格昂贵,现首要使用在医药上。
PLA is polymerized from lactic acid monomers, and lactic acid is produced from starch by special bacteria. PLA is expensive and is mainly used in medicine.
脂肪族聚酯(如聚已内酯PCL)具有较好的生物降解性,与其它广泛使用的塑料树脂具有杰出的相容性,但耐热性和物理强度差。而芳香族聚酯,如对苯二甲酸乙二醇酯的熔点高。
Aliphatic polyesters (such as polycaprolactone PCL) have good biodegradability, excellent compatibility with other widely used plastic resins, but poor heat resistance and physical strength. Aromatic polyesters, such as ethylene terephthalate, have high melting point.
机械强度大,但降解性很差,以无水碳酸锌为催化剂在氮气流下混溶可组成共聚物,通过高分子链间的酯交换所制取的这类共聚物,既具有杰出的生物降解性,又具有较强的耐热性和机械强度。
The copolymers can be formed by mixing anhydrous zinc carbonate as catalyst under nitrogen flow. The copolymers prepared by transesterification between polymer chains have excellent biodegradability, heat resistance and mechanical strength.
聚丙交酯是近年呈现的一种可作为包装资料的生物降解塑料,具有广阔的使用前景。聚丙交酯的原料是乳酸,乳酸分子中一起具有羟基和羧基官能团,反响活性较高。
Polylactide is a kind of biodegradable plastic which can be used as packaging material in recent years. It has broad application prospects. The raw material of polylactide is lactic acid, which has both hydroxyl and carboxyl functional groups in the molecule of lactic acid and has high reactivity.
在恰当条件下容易脱水缩组成聚乳酸。聚丙交酯的组成有直接缩聚和丙交酯的开环聚合两种方法。无论是组成的聚丙交酯还是发酵的葡萄糖、麦芽糖、谷物甜汁或土豆淀粉都可用来制备生物降解资料。堆肥的聚丙交酯一个月左右降解,并能被海水中的微生物吸收。
Polylactic acid can be easily dehydrated and condensed under appropriate conditions. The composition of poly (lactide) includes direct polycondensation and ring opening polymerization of lactide. Biodegradable materials can be prepared from either polylactide or fermented glucose, maltose, sweet cereal juice or potato starch. The compost polylactide is degraded in about a month and can be absorbed by microorganisms in seawater.
以上信息是我们玉米淀粉颗粒整理发布希望大家有所帮助我们的网站是:http://www.rsoau.com
The above information is our maize starch granule finishing and publishing. We hope you can help us with our website: http://www.swjkl.com!

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