Acetylated rice straw cellulose-modified polypropylene sound-insulating foam material and preparation method thereof
A technology of rice straw and sound insulation materials, which is applied in fiber raw material processing, textiles and papermaking, etc., can solve the problems that it is not easy to obtain high-quality foaming materials, gas is easy to escape, and it is difficult to foam, so as to promote the formation of cells Effects of nuclear power, improvement of interfacial compatibility, and reduction of surface tension
Inactive Publication Date: 2018-01-26
WUHU CHUANGYUAN NEW MATERIALS CO LTD
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AI Technical Summary
Problems solved by technology
Although foaming materials have many excellent properties, compared with other foaming materials, they are difficult to use for foaming
Because the crystalline plastic with soft long chains has a melting point of 165-175°C, and its melt viscosity drops rapidly after reaching the melting and crystallization temperature, so the gas is easy to escape during the foaming process, and the bubble wall cannot withstand the pressure of the escaping gas. Causes collapse and rupture, and it is not easy to obtain high-quality foamed materials
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0018] The acetylated rice straw cellulose modified polypropylene foam sound insulation material of this embodiment is prepared by the following specific steps:
[0019] (1) Wash the rice straw with tap water, dry it at 60°C at low temperature, pulverize it with a pulverizer, pass through a 60-mesh sieve, and dry it at 60°C to obtain rice straw powder for later use; add the rice straw powder to 20 times the weight Stir and mix in the sodium hydroxide solution, 80 ℃ constant temperature magnetic stirring for 2h, centrifuge washing to neutrality, add the filter residue to 20 times the weight of sodium chlorite solution, use acetic acid-sodium acetate buffer solution, adjust the pH of the system to 5 , 80°C constant temperature magnetic stirring for 2 hours, centrifugal washing to neutrality, drying in a vacuum oven at 60°C, pulverizing with a pulverizer; adding the dried and crushed product to 20 times the weight of sulfuric acid solution, stirring at a constant temperature of 85...
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Abstract
An acetylated rice straw cellulose-modified polypropylene sound-insulating foam material is prepared through the following steps: carrying out alkali leaching, sodium chlorite oxidation, acid leachingand high-pressure homogenization to prepare rice straw cellulose; preparing acetylated rice straw cellulose; removing impurities from kaolin, and carrying out microwave radiation to activate the surface of the kaolin in order to obtain surface-activated kaolin; and carrying out mixing, extrusion granulation and injection compression molding on the acetylated rice straw cellulose, the surface-activated kaolin, polypropylene, polyvinyl chloride, a foaming agent and other assistants. A polypropylene sound-insulating foam material is modified with the acetylated rice straw cellulose, so the mechanical properties of the sound-insulating material are improved, and the production cost is reduced.
Description
technical field [0001] The invention belongs to the field of sound insulation materials, and in particular relates to a polypropylene foam sound insulation material modified by acetylated rice straw cellulose and a preparation method thereof. Background technique [0002] As a fluorine-free, lightweight and environmentally suitable packaging material, expanded polypropylene is favored by people for its good heat resistance, mechanical strength, low processing cost and good environmental suitability. Although foaming materials have many excellent properties, compared with other foaming materials, they are difficult to use for foaming. Because the crystalline plastic with soft long chains has a melting point of 165-175°C, and its melt viscosity drops rapidly after reaching the melting and crystallization temperature, so the gas is easy to escape during the foaming process, and the bubble wall cannot withstand the pressure of the escaping gas. It will cause collapse and ruptur...
Claims
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IPC IPC(8): C08L23/12C08L27/06C08L1/12C08K9/06C08K9/00C08K3/34C08J9/10D21C5/00C08B3/06
Inventor 高恒东胡佳佳
Owner WUHU CHUANGYUAN NEW MATERIALS CO LTD