Preparation method of porous material composition loaded with farm chemical and coated with slow-release degradable film
A technology of porous materials and degradable films, which is applied in the field of pesticides, can solve the problems of difficulty in retaining plant stems and leaves, complicated process, and inability to retain stems and leaves, etc., and achieve the effect of prolonging the effective release period of drugs, simple process steps, and increasing retention time
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Embodiment 1
[0040] 1. Preparation of porous carbonized material:
[0041] 1) Take wheat straw as a raw material, rinse it with distilled water, dry it at 70°C for 2 hours, grind it mechanically, pass it through a 10-mesh sieve, and pulverize it for later use;
[0042] 2) Weighing 45wt% of straw powder in proportion, 35wt% of the configured mass fraction of 8% potassium hydroxide alkali solution, and 20wt% of pore-enhancing agent 15% polyvinylpyrrolidone;
[0043] 3) Soak the crushed wheat straw in the mixed solution for 5 hours, wash it with a large amount of distilled water until the pH value is 7-9, put it into a boiling dryer for ammoniation and dispersion treatment for 1 hour by heating it with ammonia gas;
[0044] 4) Put the straw powder into the tube furnace for low-temperature carbonization, and set the temperature to rise from 100°C / h to 300°C for 3 hours. During this period, the protective gas nitrogen is introduced, cooled to room temperature, and taken out for later use.
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Embodiment 2
[0058] 1. Preparation of porous carbonized material:
[0059] 1) Take wheat straw as a raw material, rinse it with distilled water, dry it at 70°C for 2.5 hours, grind it mechanically, pass it through a 10-mesh sieve, and pulverize it for later use;
[0060] 2) Weighing 60wt% of straw powder in proportion, 30wt% of the configured mass fraction of 8% potassium hydroxide alkali solution, and 10wt% of pore-enhancing agent 3% urea solution;
[0061] 3) Soak the crushed wheat straw in the mixed solution for 5 hours, wash it with a large amount of distilled water until the pH value is 7-9, and put it into a boiling dryer for ammoniation and dispersion treatment with ammonia gas for 1.5 hours;
[0062] 4) Put the straw powder into the tube furnace for low-temperature carbonization, and set the temperature to rise from 100°C / h to 300°C for 3 hours. During this period, the protective gas nitrogen is introduced, cooled to room temperature, and taken out for later use.
[0063] 2. Pesti...
Embodiment 3
[0076] 1. Preparation of porous carbonized material:
[0077] 1) Weigh wheat straw as raw material, rinse it with distilled water, dry it at 73°C for 2 hours, grind it mechanically, pass it through a 10-mesh sieve, and take a portion after ultrafine grinding;
[0078] 2) Weighing 55wt% of straw powder in proportion, 30wt% of the configured mass fraction of 8% potassium hydroxide alkali solution, and 15wt% of pore-enhancing agent 3% urea solution;
[0079] 3) Soak the crushed wheat straw in the mixed solution for 5.5 hours, wash it with a large amount of distilled water until the pH value is 7-9, and put it into a boiling dryer for 1.5 hours of ammonification and dispersion treatment with ammonia gas;
[0080] 4) Put the straw powder into the tube furnace for low-temperature carbonization, and set the temperature to rise from 100°C / h to 300°C for 3 hours. During this period, the protective gas nitrogen is introduced, cooled to room temperature, and taken out for later use.
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