Environment-friendly degradable paper tray and preparation method thereof
A paper tray, an environmentally friendly technology, applied in the field of environmentally friendly degradable paper trays and its preparation, can solve the problems of easy pollution of the environment, difficult degradation of pigments, and difficult degradation of paper trays painted with pigments, etc.
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[0053] Preparation example of Alcoholmonas ammonium nitrate microcapsules
[0054] Almomonas in the following raw materials was purchased from Shanghai Yansheng Industrial Co., Ltd., ATCC strain; sodium alginate was purchased from Qingdao Dayang Algae Industry Group Co., Ltd., food grade, model JDY-002; Tween 80 was purchased from Guangzhou Suize Environmental Protection Technology Co., Ltd., model T-80.
preparation example 1
[0056] (1) Place the hyphae of Alcoholomonas ammonium nitrate cultured in 10 g of solid medium in 9 ml of sterilized 0.9% physiological saline to prepare a bacterial suspension to obtain a core material;
[0057] (2) Weigh 0.5g of sodium alginate, 75g of water, and 0.1-0.3 parts of Tween 80, mix sodium alginate, water and Tween 80, heat up to 75°C and stir at a speed of 500r / min for 15min to obtain alginic acid Sodium wall material;
[0058] (3) Mix the sodium alginate wall material prepared in (2) with the core material prepared in (1) at a weight ratio of 1:1, and spray the above-mentioned uniformly mixed solution drop by drop with a microcapsule generator way, extruded to a mass concentration of 5% CaCl placed on a magnetic stirrer (100r / min, 37°C) 2 In the solution, stir continuously for 35min to form capsules;
[0059] (4) Filter the capsules prepared in (3) with filter paper, then rinse 3 times with sterilized normal saline, and freeze-dry at -40°C for 24 hours to obta...
preparation example 2
[0063] (a) take 3kg chitosan and place in 90kg volume fraction 2% acetic acid aqueous solution, stir 2h under the condition of 25 ℃, 450r / min, make wall material solution;
[0064] (b) Take by weighing rosin 2kg, Tween 205kg, sodium trimetaphosphate 0.4kg, dehydrated alcohol 68kg; Rosin is placed in dehydrated alcohol and stirred for 10min under the condition of 75 ℃ and 350r / min, according to mass ratio 1: 1 Add the wall material solution prepared in (a), and continue to stir for 5 minutes; then add Tween 20, stir for 45 minutes under the condition of 500 r / min, and obtain an emulsion after homogenizing by a homogenizer;
[0065] (c) Add sodium trimetaphosphate to the emulsion prepared in (b) and stir for 2 hours, then freeze-dry in a vacuum dryer at -40°C for 45 hours, and pulverize to obtain rosin microcapsule particles, rosin microcapsule particles The particle size is 100-150nm, and the coating rate is 33.75%.
[0066] Disk preparation example
[0067] The raw materials...
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