HC Plastics News: The invention of petroleum-based plastics has only been in existence for more than 100 years, but its solution period is as long as 300-500 years. Traditional plastics cause serious white pollution problems, which impose a huge burden on the global environment.
The bioplastics, ie PHA (polyhydroxyalkanoates), have similar material properties to traditional petrochemicals and can be used as an alternative to more than 50% of petroleum-based plastics. They can be used to make plastic bags, plastic tableware and plastic bottles. and many more.
More importantly, bioplastics degrade very quickly and can degrade in the soil within 3-6 months, while other microbes can eat faster and make the land more fertile.
However, at present, the world's most common petroleum-based plastics, polyethylene and polypropylene, have an annual production capacity of 130-140 million tons. The annual production capacity of PHA is only about 50,000 tons, and the output is only a fraction of the petroleum-based plastics.
The key reason is cost. The plastic is too cheap, the production process is too mature, and the amount of use is too large. According to the analysis, the price of bioplastics (PHA) produced according to the current process is about 3 to 10 times that of ordinary polyethylene and polypropylene.
Therefore, in order to make bioplastics popular, it is necessary to reduce the cost, that is, "how to cheaply fertilize certain microorganisms."
Tsinghua University's "College of Life Sciences" and "Changjiang Scholars" Distinguished Professor Chen Guoqiang led a young team to find suitable strains and use the emerging "synthetic biology" technology to reconstruct the PHA production process and achieve total production costs. It is half the world's technology and is at the forefront of the world.
Professor Chen Guoqiang
At present, they have successfully completed the 8-month bio-plastics new technology industrialization pilot test, and will begin mass production of 50,000-100,000 tons in 2018.
A corner of the PHA pilot production workshop
At present, PHA pellets have been used in degradable agricultural film, disposable wood powder blending and pure PHA tableware, color 3D printing silk, electrospun fiber, shopping bags and other end products:
The PHA accumulated in the bacterium of Roche's true bacterium can account for 80% of the dry weight of the cells (the weight of the cells after removing the water).
PHA has also been found to have good medical value. It has good biocompatibility. P4HB in PHA has been used as a surgical suture and has been approved for clinical use in the United States. It is used to develop cartilage repair materials and nerve conduits. , artificial esophagus and so on. 
Editor in charge: Ye Dan
Garden Lights,Garden Lights Outdoor,Garden Lights Solar
China Searun Solar Solution Co., Ltd. , https://www.searunsolar.com