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- W2033282273 abstract "A large quantity of plant wastes (such as wood scrap, rice bran, used tea leaves, and the dregs from squeezed fruit) is generated by the woodworking and food industries and agriculture. The recycling of these wastes is limited to their use in feed, fertilizer, fuel, and cosmetics. In this study, by using lignin that is one of the main components in plants, a new recycling method for plant wastes was designed. Lignin is a phenolic high-molecular-mass biopolymer based on phenylpropanoid units that are unique to vascular land plants. It accounts for approximately one-third of the organic matrix of wood and makes up a large component of grasses, leaves, and coniferous tree needles. It is known that lignin absorbs ultraviolet rays well in the wood components. Hirabayashi and Shimizu developed the lignocellulose film which was made from lignin and cellulose and showed high absorption of ultraviolet rays. The lignocellulose is an ultraviolet rays absorption filter. However, it is not clear whether lignin defends matrix in the film from deterioration caused by the ultraviolet rays. In this study, the effect of lignin in synthetic polymer was examined. The influence of lignin as an ultraviolet absorbent to the synthetic polymer as a matrix is now under way. Polypropylene (PP) and polyethylene (PE), popular polyolefin resin plastics in many fields, are commonly used together with an ultraviolet absorbent because tolerance of these plastics to ultraviolet rays is relatively low. Usually, the synthetic ultraviolet absorbent, benzotoriazole or benzophenone series was used for this purpose. It is feared that the use of synthetic ultraviolet rays absorbent such as benzotoriazole affects the environmental status. Use of lignin may decrease the load to the environment because lignin is one of natural materials. Furthermore, it can contribute effective use of botanical wastes. In this study, PP and PE test pieces containing lignin were fabricated, and the anti-deterioration effect of lignin as an ultraviolet absorbent was investigated through an outdoor exposure test. In our knowledge, this is the first report to use lignin as an ultraviolet rays absorbent in the polyolefin resins." @default.
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- W2033282273 date "2005-08-01" @default.
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- W2033282273 title "Anti-deterioration Effect of Lignin as an Ultraviolet Absorbent in Polypropylene and Polyethylene" @default.
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- W2033282273 doi "https://doi.org/10.1295/polymj.37.633" @default.
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