The hottest Japanese developed bioplastics superio

2022-08-15
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Japan has developed bioplastics superior to PLA from cashew nut shells

ne. On the contrary, company C has developed a bioplastics material, and the plant sex ratio (the proportion of plant raw materials to the total mass) of the material is as high as 70%

the formed products and particles of newly developed bioplastics

some properties of new bioplastics, such as toughness, impact resistance and heat resistance, are no less than polylactic acid. The company plans to continue to develop the research of bioplastics in the field of electronic equipment materials and strive to be practical in 2013

straw 2. Reference straw (cellulose) and cashew nut (cashew phenol) are used as raw materials. Cashew nuts in the photo are models

the main raw materials of new bioplastics are cellulose in plant stems and cardanol in cashew nut shells. The specific generation process is: make the cellulose (cellulose acetate) with improved activity by acetic acid and cashew phenol with improved activity by generation and reforming react in organic solvent. Thus, plastic that can be heated and melted is obtained. During the reaction, substances with increased density were added. The company did not disclose the details of the additive, but it was known that it was a substance with highly active functional groups on the benzene ring. The company believes that both cellulose and cardanol are guaranteed in terms of output and can be a stable supply of raw materials

cellulose acetate (in front of the camera) and denatured cashew phenol

cellulose acetate is a practical bioplastics. It is mainly used for making photos and film, and polarizing film for display. However, in order to obtain plasticity, a large number of plasticizers derived from petroleum must be added, and additives that improve strength and heat resistance are also required, so the vegetal degree is about 40%. In addition, due to its low water resistance (high water absorption), it is not suitable for the housing of electronic products, and its use is limited to the film materials mentioned above

cashew nut shell (left) and cashew nut phenol obtained from it

the new material uses cashew nut phenol from plants instead of plasticizer, so it can achieve up to 70% vegetal degree. In addition, compared with PLA, which is widely used in bioplastics, although the vegetal degree of PLA itself is 100%, in order to improve the strength and fluidity of structural components, petroleum derived plastics will be added. In most cases, the actual vegetal degree is about 25%. Therefore, NEC believes that the new material has an advantage over PLA in terms of plant density

cellulosic raw materials

however, there are still some problems in the fluidity and flame retardancy of new materials in the preparation of cement mortar. If additives are used to improve these problems in the future, the plant density may decline. On the other hand, the research on extracting acetic acid from plants for reforming cellulose is also advancing. If it is successful, it is expected to increase the plant yield to nearly 90%

synthesized in organic solvent (left). On the right is synthetic plastic

cashew phenol is a kind of phenol, and straight chain hydrocarbons bind near the hydroxyl group. Because of the existence of this part, it brings hydrophobicity and flexibility to the material. It has been used as friction adjusting material, coating and insulating material additive of automobile brake, but the current situation is that the whole cashew nut shell is not used, and most of the shell is used as fuel

nec will further devote itself to the improvement of physical properties of the material and the establishment of mass production technology curtain wall and large window wall system PNAP 106:1998. At present, it is only a synthesis reaction at the laboratory level, and it is planned to develop a process that can carry out efficient synthesis. It is envisaged to cooperate with material manufacturers during mass production

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