Degradable high polymer material of poplar wood pulp cellulose and its preparation method
A polymer material and cellulose technology, applied in the field of degradable polymer materials and their preparation, can solve the problems of plasticizer migration, unsuitable for degradable plastics, etc., to improve compatibility, reduce phase separation, and improve The effect of toughness and ductility
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Embodiment 1
[0022] A poplar wood pulp cellulose biodegradable polymer material, comprising 100 parts by mass of a resin mixture and 5-30 parts by mass of a plasticizer. The mass parts of the plasticizer can be selected as 5 parts, 7 parts, and 8 parts. 10 parts, 13 parts, 15 parts, 18 parts, 20 parts, 22 parts, 24 parts, 25 parts, 27 parts, 29 parts, the resin mixture includes cellulose acetate prepared from poplar wood pulp cellulose, and also includes polycaprolactone , Polylactic acid, corn starch, one or a mixture of several, wherein the mass of cellulose acetate is 20-60 parts, for example, 25 parts, 28 parts, 30 parts, 35 parts, 40 parts, 45 parts can be selected , 50 parts, 52 parts, 55 parts, 58 parts, the mass of polycaprolactone is 10-40 parts, for example, it can be selected as 12 parts, 15 parts, 18 parts, 20 parts, 22 parts, 28 parts, 30 parts, 33 parts, 36 parts, 38 parts, the mass of polylactic acid is 10-40 parts, for example, it can be selected as: 13 parts, 16 parts, 19 part...
Embodiment 2
[0025] A method for preparing poplar wood pulp cellulose biodegradable polymer material, including the following steps:
[0026]The first step is the preparation of poplar cellulose acetate: After the poplar wood pulp is uniformly dispersed, glacial acetic acid is added for activation. The activation temperature is 30 to 90°C. The activation temperature can be selected as 35°C, 40°C, 45°C, and 50°C. 60℃, 70℃, 85℃, 88℃, the activation time is 2h-24h, the activation time can be selected as: 2 hours, 4 hours, 5 hours, 8 hours, 9 hours, 11 hours, 12 hours, 14 hours, 18 Hours, 20 hours, 22 hours, 23 hours, then add a mixture of acetic anhydride, glacial acetic acid, and catalyst for esterification. The mass of glacial acetic acid is 1-100 times that of cellulose, for example, 8 times or 15 times. , 20 times, 30 times, 43 times, 52 times, 60 times, 70 times, 82 times, 85 times, 90 times, the catalyst mass is 0.5-15% of poplar cellulose, for example, it can be selected as: 0.8%, 1.2 %, 1...
Embodiment 3
[0031] Weigh 10Kg of poplar wood pulp in a 500L reactor. The jacketed water bath is at 40°C. Under constant stirring, 100Kg of glacial acetic acid is added dropwise to activate the cellulose. After the cellulose is fully swelled, 28.33Kg of acetic acid is added. Anhydride and 0.5Kg catalyst are used for esterification. When the reaction showed a uniform and transparent solution, 12Kg of dilute acetic acid was added to hydrolyze the degree of substitution of the product to 2.3. The solution system obtained at this time is precipitated, filtered, washed, dried and then placed in an oven at 60°C to be dried to a constant weight.
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