[China Packaging Network News] In order to reduce the environmental pollution of plastic packaging materials, Russian researchers used agricultural and forestry wastes and polyethylene and other chemical materials to make a polymer-based biocomposite packaging material that can be naturally degraded in soil.
Since the advent of plastic products, it has caused people's lives to bring convenience, but also brought distress to people, especially in the promotion of green today, "white pollution" even more disgusting. The so-called "white pollution" refers to the use of polystyrene, polypropylene, polyvinyl chloride and other polymer compounds made of various types of living plastic products after being disposed of into solid waste, due to random littering and difficult to degradation treatment, As a result, the environment is seriously polluted.
Biodegradation Process of Degradable Products
Recently, researchers at the Plekhanov University of Economics in Moscow reported in a new issue of the Dutch Journal of Polymers and the Environment that agricultural and forestry waste (mainly wood fiber powder, crop stalk fiber, etc.) and polyethylene Such chemical materials were mixed to produce a polymer-based biocomposite packaging material that could be naturally degraded in soil. The physical characteristics, water absorption, and oxidative degradation rate and biomaterial particles of the two types of biocomposites produced at the same time were examined. Relationship between dimensions. The results showed that the composites made of wood fiber powder and polyethylene mixed with the larger particles naturally degrade faster when piled up at high temperatures in the soil; however, the size of the particles made from the stem fiber of the crop and the degradation rate of the generated material are not obvious. Associations.
The main process is to make wood fiber powder particles from shells of sunflower seeds, wheat glutinous rice, and sawdust of wood, and to make granules of fibers of flax and wheat stalks, and to separate each of the above two types of particles. Chemical polymers such as polyethylene are mixed in a certain proportion, and additives containing EVA (ethylene vinyl acetate) resin are also added between them to promote better fusion reaction of various materials in the mixture. The cost of synthesis of these biocomposites is comparable to or slightly less than that of purely chemical polymers.
Pan Qihuo, director of the Composite Materials and Process Laboratory at the Plekhanov University of Economics, who participated in the study, said that the idea of ​​using biomaterials and chemical polymers to make packaging materials is not new. Overseas researchers are trying to use them. Bamboo, bananas, bamboo, sugar cane stalk fibers and coffee bean shells and other agricultural waste made of biodegradable plastics. However, the proportion of these biological materials and the process of mixing them with chemical polymers can make plastics achieve ideal strength, toughness, and maintain good degradation characteristics. This poses a problem for researchers. The project research team will continue to improve the relevant processes in order to reach the practical level as soon as possible.
Many research institutions have focused on the research of biodegradable plastics. After scientists at the University of Bath’s Center for Sustainable Chemistry Technology (CSCT) discovered that it is possible to use sugar and carbon dioxide to make biodegradable plastics instead of plastics made from crude oil. . Carbon dioxide is added to sugars at low pressure and at room temperature to produce alternative polycarbonates through a new process. Polycarbonates are often used in the manufacture of beverage bottles, eyeglass lenses, and mobile phones to replace polycarbonate with sugar and carbon dioxide products. Ester will make production cheaper and safer.
The liquid eyeliner has a rich and smooth line, which is very suitable for the current fashion to pick up makeup on the end of the eye. A slight increase in the tail can emphasize the femininity. Draw a slightly upward extension line along the arc of the outer corner of the eye, but the upward length should not exceed the width of the double eyelid, as it will look unnatural if it is too long.
The earliest written record about liquid eyeliner is that liquid eyeliner can generally be divided into liquid form (in a tube), cake form and pen form. Liquid eyeliner and eyeliner can be drawn directly, while the eyeliner cake must be dipped in water.
The technique of using liquid eyeliner is difficult to master. If you want to make your Eye Makeup natural, you must practice more. People who work under the strong light in front of the camera need to highlight the eye line. It is best to use black or dark brown liquid eyeliner. High-quality liquid eyeliner will dry faster. Choose a shorter brush handle, and when drawing eyeliner, put your little finger on your cheek, which is easier to control and not easy to draw the eyeliner crookedly.
Liquid Eyeliner,Pretty Girls Want Waterproof Liquid Eyeliner,Black Liquid Eyeliner,Matte Liquid Eyeliner,Long Lasting Eyeliner etc.
Liquid Eyeliner,Waterproof Liquid Eyeliner,Black Liquid Eyeliner,Matte Liquid Eyeliner,Long Lasting Eyeliner
Jilin Xiangqi Technology Co., Ltd , https://www.xqccosmetics.com