Yesterday, June 7 (Zhejiang Online reporter Zhang Jiheng correspondent Wen Zhengshun) plastic wrap is essential for our daily life, with plastic wrap, people not only to ensure food hygiene at the same time, but also in a short time Keep the freshness of the food. but do you know? Now on the market PE material cling film, although already has a good fresh capacity, but it is difficult to degradation, it is likely to occur buried in the soil "one hundred years are not bad" situation.

     However, Zhejiang University of Technology, a basic research will be expected to solve this problem. Recently, the Zhejiang Provincial Natural Science Foundation Youth Fund project sponsor, Zhejiang University of Technology Professor Yu Houyong told reporters his research results: "Hydrogen-based control of cellulose nano-microfiber surface structure design and its suppression PHBV six ring intermediate Eliminate the mechanism. "

    "Do not look at my research project name so long and also mouthful, that white, is to solve the current bio-polyester material preparation process in the existence of a series of problems, so that fresh-keeping ability to further enhance the ability to achieve biodegradable. (PHBV), the thermal processing window is narrow and the thermal degradation mechanism is not clear. The nanometer technology and chemical structure design are used to prepare different surfaces. The results show that the thermal stability of the bio-polyester (PHBV) Groups of cellulose nanofibers (CNC) and their fully biodegradable composites.

     It is understood that the use of sulfuric acid and hydrochloric acid hydrothermal method of preparation of cellulose nanofibers, solvent replacement method and PHBV compound, prepared different PHBV / CNC nanocomposites. The high performance nanocomposites were prepared by the direct blending of cellulose ester nanofibers with PHBV, which not only overcome the shortcomings of solvent replacement method, but also consumes a large amount of solvent, and realized the high content of cellulose in PHBV Load of nanofibers. At the same time, the hydrogen bond between the hydroxyl groups of cellulose nanofibers and the ester carbonyl groups of PHBV is often controlled by the study. The properties of PHBV / CNC composites are often determined.

     Yu Houyong said that high-performance biodegradable composite materials refer to the use of biomass organic reinforcing materials (such as cellulose nanofibers) nano-size dispersed in the biodegradable polymer matrix in the formation of nanocomposites. This material can overcome the common biodegradable polymer common heat distortion temperature is low, poor heat resistance, narrow processing window, poor mechanical properties and other defects, while emphasizing the degradation of the material, taking into account the use of materials, Medicine, medicine, environment and other aspects of a wider range of applications.

    Yu Houyong told reporters that the research results not only broaden the PHBV melting processing window, for the preparation of high performance biodegradable fiber materials to provide a theoretical basis; and can promote the biomass fiber science, nano-processing technology and materials science and other disciplines of cross- Important Academic Significance and Scientific Value. "In the future, our home cling film, not only to achieve half a month of fresh capacity, but also to achieve a green environmental degradation.