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The new direction of PBAT blown film: using straw as filler?

 Last Update: 2022-09-22
 Source: Internet
 Author: User

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The Institute of Biodegradable Materials reported that China, as a major agricultural country, produces a large amount of crop straw every year, which are mainly used in fields such as straw fertilizer, feed production and fiberboard preparation

However, more than 30wt% of crop straws are still burned in situ every year, which not only causes harm to human health, but also further aggravates the global greenhouse effect, and is also a great waste of biomass resources

In recent years, documents such as the 14th Five-Year Innovation Plan issued by many countries and provinces have emphasized the need to strengthen the green conversion of agricultural and forestry biomass and the resource utilization of waste
.
And the third generation technology of polylactic acid monomer - lactic acid is also prepared with straw as raw material
.
Therefore, the high-value utilization of straw not only meets the dual policy requirements of banning plastics and limiting carbon and carbon neutrality, but also meets the country's call to strengthen the resource utilization of agricultural and forestry wastes
.

Extracting cellulose from crop stalks and making it nano-sized is an effective way to realize high-value application of crop stalks.
However, the operation process of extracting cellulose from crop stalks and then nano-forming it is complicated, and the reagents used are harmful to the environment.
cause pollution, and the utilization rate of straw is still low
.

Researcher Wu Min and Huang Yong from the Institute of Physics and Chemistry of the Chinese Academy of Sciences have developed a technology for nano-scale agricultural waste straw and its full-component utilization, which omits the separation and purification of cellulose, hemicellulose and lignin in crop straw.
In the process, the nanocellulose containing lignin and hemicellulose can be directly prepared by a simple mechanochemical method, and the full-component utilization of crop straw can be realized
.

The results show that the aspect ratio of lignocellulose prepared by this method is about 200-1000, which can be widely used in the preparation of high-strength nanocellulose films, reinforced polymer materials, high-efficiency adsorption filter materials, and biomedical materials
.
When used in the field of degradable plastics, it can also be used as functional fillers, etc.
to blend blown films with biodegradable polyester, and the price is not higher than that of starch
.

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