The hottest new technology that can mass produce b

2022-09-23
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New technologies that can mass produce biodegradable plastics have emerged

the latest research from the University of Nebraska Lincoln and Jiangnan University shows that a simple production step derived from plants is introduced. Biodegradable plastics can improve their performance and overcome the obstacles brought by commercial manufacturing

a degradable plastic fiber developed by the University of Nebraska Lincoln. Researchers in Nebraska and their colleagues showed that a new technology can not only improve the nature of bioplastics and promote the healthy development of e-commerce, industrial Internet and Internet finance, but also simplify its production process and make it more competitive compared with its peers who make plastics based on oil. Source: Craig Chandler, Nebraska Lincoln University

which step? Bring heat

Yiqi Yang and his colleagues in Nebraska found that raising the temperature of bioplastic fibers to hundreds of degrees Fahrenheit and then slowly cooling them can greatly improve the resistance of bioplastics to heat and moisture

according to the research report, this thermal method can also allow the team to bypass the use of solvents and other expensive and time-consuming technologies that are often required to manufacture bioplastics for commercial purposes

Yang said that this method can enable manufacturers of corn derived plastics, such as Cargill factories in Blair and Nebraska, to continuously produce biodegradable materials at least on the basis of oil-based plastic industry standards. Mongolia takes the development of economic and trade relations as a priority area of its relations with China. Recent research estimates that about 90% of plastics in the United States are non recyclable

the authors report that "this clean technology makes it possible to commercialize the industrial scale production of bioplastics."

it is difficult to become an environmental friendly plastic

this changes the experimental machine method to use polylactic acid or polylactide, a degradable plastic that can be fermented and extracted from corn starch, sugarcane and other plants. Although most plastics are made of petroleum, polylactic acid has become an environmentally friendly substitute

however, especially in the manufacturing process, the sensitivity of polylactide to heat and humidity limits its use in textiles and other industries. When looking for a solution to this problem, researchers have long found that mixing mirror polylactic acid molecules - commonly known as "L" and "d" - can produce stronger molecular interactions, which is more effective than using L or D alone

but there is another trap. It is difficult to convince people that a reasonable proportion of L and D molecules can be permanently paired, which often forces researchers to plan expensive and complex pairing plans. Some of the most common ones involve the use of solvents or other chemicals, which may cause environmental problems

"the problem is that people can't find a way for you to use it on a large scale to make it work," said Yang, Professor Charles Bessey of biosystems engineering and textile, marketing and clothing design. "People use dirty solvents or other additives. But these are not conducive to the sustainability of production."

"we don't want to dissolve these polymers, then try to evaporate the solvent, and then consider reusing them." This is too expensive (and) unrealistic

Yang and his colleagues decided to take another approach. After mixing L and D polylactic acid pellets and spinning them into fibers, the team quickly heated them to 400 degrees Fahrenheit

the resulting bioplastics resist melting at a high temperature of more than 100 degrees Celsius, while plastics contain only l or D molecules. It also maintains its structural integrity and tensile strength, because it is submerged in more than 250 degrees of water, which is similar to the conditions that bioplastics must endure when they are incorporated into dyed textiles

Yang Yuanqing said that the textile industry produces about 100 million tons of fiber every year, which means that for the oil manufacturing industry, a feasible green alternative product can reap environmental and economic returns

"so we just use a cheap method for sustainable application, which is an important part of the equation," Yang said. "In order to carry out large-scale production, you must constantly do these works. These are important factors."

although the team has carried out small-scale continuous production in Young's laboratory, he said that he would soon further explain how to integrate this method into the existing industrial processes

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