Phosphate starch-soybean protein copolymer film and its preparation method
A technology of soybean protein and phosphate ester, applied in the field of plastic film production, can solve the problems of affecting stability, poor water resistance, insoluble, etc., and achieve the effect of low production cost, low price and abundant sources
Active Publication Date: 2016-06-22
ANHUI CHAOHU SOUTH MEMBRANE IND
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Problems solved by technology
However, the starch molecular chain contains a large number of hydroxyl groups, which are easy to form hydrogen bonds inside and outside the molecular chain, so it is insoluble, infusible, and has poor water resistance. It is easy to absorb water when exposed to water or stored in humid air for a long time, affecting its stability. sex
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[0017] Specific embodiment: phosphate ester starch-soybean protein copolymer film, its composition mainly comprises: 15 parts of disodium hydrogen phosphate, 100 parts of cornstarch, 100 parts of soybean protein, 5 parts of turpentine, 15 parts of 50% sodium hydroxide aqueous solution, lime water 40 parts, 30 parts of water glass, 2 parts of thiourea, 1 part of carbon tetrachloride, 2 parts of pentachlorophenol, and 200 parts of water.
[0018] Phosphate starch-soybean protein copolymer film preparation process specifically comprises the following steps:
[0019] Step 1: Put water and disodium hydrogen phosphate into the mixing tank according to the proportion, heat up to 60°C under constant stirring, so that the disodium hydrogen phosphate solution is completely dissolved, and fully mix the corn starch and disodium hydrogen phosphate solution according to the proportion Put it into the reactor, stir the material in the reactor and raise the temperature to 70-80°C. When the wa...
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Phosphate ester starch-soybean protein copolymerized film and its preparation method, its main components include: 15-20 parts of disodium hydrogen phosphate, 100-150 parts of corn starch, 100-120 parts of soybean protein, 5-7 parts of turpentine, 50% hydrogen Sodium oxide aqueous solution 15-20 parts, lime water 40-50 parts, water glass 30-40 parts, thiourea 2-5 parts, carbon tetrachloride 1-2 parts, pentachlorophenol 2-5 parts, water 200-220 parts share. After mixing and adjusting, extruding through a twin-screw extruder, cooling in water, and cutting to obtain a double-degradable masterbatch, and finally blowing the film through a film blowing machine to obtain the target film product. The beneficial effects of the invention are: the starch used in the invention is rich in sources, low in price, and environmentally friendly; and the prepared plastic film has high strength, low production cost, biodegradability, and can effectively alleviate the problem of white pollution.
Description
Technical field: [0001] The invention relates to the technical field of plastic film production, in particular to a phosphate starch-soybean protein copolymerized film and a preparation method thereof. Background technique: [0002] With the vigorous development of the plastic industry, the environmental pollution caused by waste plastic film garbage is becoming more and more serious, and white pollution has become a global environmental problem. Therefore, people must intensify their efforts to develop biodegradable plastic films to control the environmental pollution caused by plastic waste. [0003] Starch is a natural polymer material with abundant sources and low price. It is also an inexhaustible renewable resource. It can be biodegraded under various environmental conditions. The final degradation products carbon dioxide and water can It is recycled through photosynthesis of plants without causing any pollution to the environment. However, the starch molecular chain...
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IPC IPC(8): C08L3/06C08L89/00C08B31/06C08J5/18
Inventor 武道贵
Owner ANHUI CHAOHU SOUTH MEMBRANE IND