Novel green degradable high-elasticity membrane material
A high-elasticity, film material technology, applied in the field of new green degradable high-elasticity film materials, can solve the problems of easy hydrolysis and strength reduction of hemicellulose film, and achieve the effects of environmental friendliness, low production cost and simple production process
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Embodiment 1
[0017] A novel green degradable high elastic membrane material, the preparation method comprising the following steps:
[0018] (1) Add 80ml of ethanol and 4g of hemicellulose into the beaker, add 30% sodium hydroxide solution under stirring, mix and stir for 15 minutes and heat to 60°C, add 6g of Stir evenly, heat up to 80°C under heating in a water bath, gelatinize for 30 minutes, cool to room temperature naturally, and refrigerate the gelatinized product cooled to room temperature at 0°C for 10 hours to form a gel liquid;
[0019] (2) Add 20ml of ethanol to the gel solution, and add 7g of chloroacetic acid under stirring, heat up to 50°C, continue mechanical stirring for 30 minutes, add 3.0g of polyvinyl alcohol and 2.5g of sodium hydroxide, at 70°C The etherification reaction was carried out for 3 hours, and the obtained reaction liquid was neutralized with hydrochloric acid solution until the pH value was between 7.2-7.3, and suction filtered, and the obtained product was...
Embodiment 2
[0025] A novel green degradable high elastic membrane material, the preparation method comprising the following steps:
[0026] (1) Add 90ml of ethanol and 4.5g of hemicellulose into the beaker, add a sodium hydroxide solution with a mass concentration of 33% under stirring, mix and stir for 18 minutes and heat to 65°C, add 7g of Stir evenly, heat up to 85°C under heating in a water bath, gelatinize for 35 minutes, cool to room temperature naturally, and refrigerate the gelatinized product cooled to room temperature at 3°C for 11 hours to form a gel liquid;
[0027] (2) Add 25 milliliters of ethanol to the gel solution, and add 7.5 grams of chloroacetic acid under stirring, heat up to 55 ° C, continue mechanical stirring for 35 minutes, add 3.3 grams of polyvinyl alcohol and 2.8 grams of sodium hydroxide, at 75 ° C The etherification reaction was carried out for 3.5 hours, and the obtained reaction liquid was neutralized with hydrochloric acid solution until the pH value was...
Embodiment 3
[0033] A novel green degradable high elastic membrane material, the preparation method comprising the following steps:
[0034] (1) Add 100ml of ethanol and 5g of hemicellulose into the beaker, add a sodium hydroxide solution with a mass concentration of 35% under stirring, mix and stir for 20 minutes and heat to 70°C, add 6- 8 grams of starch, stir evenly, heat up to 90°C under heating in a water bath, gelatinize for 40 minutes, naturally cool to room temperature, and refrigerate the gelatinized product cooled to room temperature at 5°C for 12 hours to form a gel liquid;
[0035] (2) Add 20-30 milliliters of ethanol to the gel solution, and add 8 grams of chloroacetic acid under stirring, heat up to 60 ° C, continue mechanical stirring for 40 minutes, add 3.5 grams of polyvinyl alcohol and 3.0 grams of sodium hydroxide, in Etherification reaction at 80°C for 4 hours, the obtained reaction solution was neutralized with hydrochloric acid solution until the pH value was between ...
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