Recycle

تولیدات پلاستیک زیست تخریب پذیر

The production of plastic in the world is estimated to be over 100 million tons per year. The increasing need for such large quantities of conventional plastics and their superiority over other materials is due to their “long-term properties”. These properties include resistance to chemical reactions, especially enzyme reactions. For example, it may take 100 years for a few grams of plastic (such as polyethylene) to decompose under normal environmental conditions.

Decomposition at high temperature (such as pyrolysis technology) releases toxic gases. Therefore, the accumulation of plastic in nature will lead to many problems in the present and future world. از مشکلات زیست محیطی‌ ایجاد شده توسط پلاستیک‌ها می‌توان به تغییر در چرخه دی اکسید کربن ، مشکلات در تولید کمپوست و افزایش انتشار گاز‌های سمی اشاره نمود. For this reason, scientists are investigating the optimal use of plastics. There are two strategies for recycling or producing plastics that do not require a long time to decompose.

Degradable plastics are classified by the American Society for Testing Materials (ASTM D20.96):

A) Light-degradable plastics: Back Translating Biodegradable plastic products You don’t have enough credits to translate automatically! Get more credits 47 Segments Original Persian Translation English Search content in original language Title Biodegradable plastic products Biodegradable plastic products body The production of plastic in the world is estimated to be over 100 million tons per year. The production of plastic in the world is estimated to be over 100 million tons per year. body The increasing need for such large quantities of conventional plastics and their superiority over other materials is due to their “long-term properties”. The increasing need for such large quantities of conventional plastics and their superiority over other materials is due to their “long-term properties”. body These properties include resistance to chemical reactions, especially enzyme reactions. These properties include resistance to chemical reactions, especially enzyme reactions. body For example, it may take 100 years for a few grams of plastic (such as polyethylene) to decompose under normal environmental conditions. For example, it may take 100 years for a few grams of plastic (such as polyethylene) to decompose under normal environmental conditions. body Decomposition at high temperature (such as pyrolysis technology) releases toxic gases. Decomposition at high temperature (such as pyrolysis technology) releases toxic gases. body Therefore, the accumulation of plastic in nature will lead to many problems in the present and future world. Therefore, the accumulation of plastic in nature will lead to many problems in the present and future world. body Among the environmental problems caused by plastics, we can mention changes in the carbon dioxide cycle, problems in compost production, and increasing the emission of toxic gases. Among the environmental problems caused by plastics, we can mention changes in the carbon dioxide cycle, problems in compost production, and increasing the emission of toxic gases. body For this reason, scientists are investigating the optimal use of plastics. For this reason, scientists are investigating the optimal use of plastics. body There are two strategies for recycling or producing plastics that do not require a long time to decompose. There are two strategies for recycling or producing plastics that do not require a long time to decompose. body Degradable plastics are classified by the American Society for Testing Materials (ASTM D20.96): Degradable plastics are classified by the American Society for Testing Materials (ASTM D20.96): body A) Light-degradable plastics: A) Light-degradable plastics: body Plastic that breaks down in sunlight. body b) Oxidative degradable plastic: body Plastic that decomposes by oxidation. body c) Hydrolytically degradable plastic: body Plastic that decomposes by hydrolysis. body d) Biodegradable plastic: body Plastic that is decomposed by natural microorganisms such as bacteria, fungi and algae. body In the first 3 groups, plastics require additional inputs such as UV rays or oxygen for decomposition. body However, the last group, which are biodegradable plastics, decompose naturally. body Among the products that are produced and decomposed in this way, we can mention disposable vegetable containers. body Biodegradable plastics are polymers that, in addition to having the same properties as plastic, are sensitive to the hydrolysis of natural enzymes or other chemical attacks. body As a result, these types of plastics are either converted into oligosaccharides (a type of carbohydrate) or into monomers through polymer decomposition or into gaseous components through mineralization. body Starch is a natural polymer that is biodegradable and plays an important role in the production of plant-based and biodegradable disposable containers. body This article is derived from the investigation of the role of starch and biodegradable plastic products in Thailand. body Biodegradable plastic products Biodegradable plastic products body The design of starch-based polymers and biodegradable composites with high mechanical resistance and waterproofing is still associated with many challenges. body Although thermoplastic starch has appeared as a substitute for petroleum-based polymers, but its poor stability in wet and dry conditions prevents its selection as the preferred polymer. body On the other hand, unmodified starch granules, when combined with other thermoplastics at a concentration above 5%, have problems such as not being in the same phase and not mixing well. body In the above article, a method for the preparation of biodegradable plastics is presented, which includes a large amount of unmodified corn starch (more than 80% by volume) in an ethoxypolyorganosiloxane thermostat, thereby producing bio-elastomers with waterproof properties and mechanical resistance. It makes more possible. body Depending on the amount of starch granules used, the mechanical and elastic properties of these elastomers will be improved. In addition, starch granules significantly reduce the surface friction coefficient of the polyorganosiloxane network. Corn starch granules have a very good compatibility with modified polysiloxane. Regardless of the starch concentration, all developed bio-elastomers have a waterproof surface with a lower friction coefficient and their water absorption capacity is much lower compared to thermoplastic starches.
b) Oxidative degradable plastic: پلاستیکی که توسط اکسیداسیون تجزیه میشود.
c) Hydrolytically degradable plastic: Plastic that decomposes by hydrolysis.
d) Biodegradable plastic: Plastic that is decomposed by natural microorganisms such as bacteria, fungi and algae.

In the first 3 groups, plastics require additional inputs such as UV rays or oxygen for decomposition. However, the last group, which are biodegradable plastics, decompose naturally. Among the products that are produced and decomposed in this way, we can mention disposable vegetable containers.

Biodegradable plastics are polymers that, in addition to having the same properties as plastic, are sensitive to the hydrolysis of natural enzymes or other chemical attacks. As a result, these types of plastics are either converted into oligosaccharides (a type of carbohydrate) or into monomers through polymer decomposition or into gaseous components through mineralization. Starch is a natural polymer that is biodegradable and plays an important role in the production of plant-based and biodegradable disposable containers.

This article is derived from the investigation of the role of starch and biodegradable plastic products in Thailand.

Biodegradable plastic products

The design of starch-based polymers and biodegradable composites with high mechanical resistance and waterproofing is still associated with many challenges. Although thermoplastic starch has appeared as a substitute for petroleum-based polymers, but its poor stability in wet and dry conditions prevents its selection as the preferred polymer.

On the other hand, unmodified starch granules, when combined with other thermoplastics at a concentration above 5%, have problems such as not being in the same phase and not mixing well. In the above article, a method for the preparation of biodegradable plastics is presented, which includes a large amount of unmodified corn starch (more than 80% by volume) in an ethoxypolyorganosiloxane thermostat, thereby producing bio-elastomers with waterproof properties and mechanical resistance. It makes more possible.

بسته به میزان گرانول نشاسته مورد مصرف ، خواص مکانیکی و کشسانی این الاستومر‌ها بهبود خواهند یافت. علاوه بر این ، گرانول نشاسته به طرز قابل توجهی‌ ضریب اصطکاک سطحی شبکه پلی ارگانو سیلوکسان را کاهش می دهند.گرانول نشاسته ذرت دارای سازگاری بسیار خوبی با پلی سیلوکسان اصلاح شده دارد. صرف نظر از غلظت نشاسته ، تمامی‌ الاستومر‌های زیستی‌ توسعه یافته ، سطحی ضد آب با ضریب اصطکاک کمتری داشته و نیز ظرفیت جذب آب آنها در مقایسه با نشاسته‌های ترمو پلاستیکی بسیار کمتر می‌باشد.

Bio-elastomers are environmentally friendly and are estimated to degrade in the Mediterranean Sea within three to six years.
The above article is recommended for reviewing the formula for the production of disposable vegetable containers.

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