Oil-proof wrapping paper and preparation method thereof
A technology of wrapping paper and oil-proof paper, which is applied in the direction of wrapping paper, wrapping paper, packaging, etc., can solve the problems of oil-proof food wrapping paper not being environmentally friendly, high amount of oil-proof agent used, and low product strength, so as to improve product grade and Effect of adding value, improving surface oil repellency, and improving internal oil repellency
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Example Embodiment
[0043] Example 1
[0044] The method for preparing oil-proof packaging paper of this embodiment includes the following steps:
[0045] (1) Preparation of oil-proof plant microfibrils
[0046] At room temperature, add 50kg of fluorobenzoyl chloride, 50kg of dimethylformamide, and 50kg of plant fiber microfibrils into the reactor successively, stir and mix evenly, heat to 70°C, and stir for 2h at 70°C; react; After the end, cool to room temperature, filter the product to remove excess solvent, and then wash with dichloromethane twice, then with ethanol twice, take it out after washing, and dry at 60°C for 24h to obtain oil-proof vegetable microfiber Silk; wherein: the diameter of the plant fiber microfibrils is 5-10um, and the length is 200-400um.
[0047] (2) A method for preparing oil-resistant (modified) nano cellulose, the method includes the following steps:
[0048] At room temperature, sequentially add 1000g of fluorobenzoyl chloride, 750g of dimethylformamide, and 250g of nano-cell
Example Embodiment
[0056] Example 2
[0057] The method for preparing oil-proof packaging paper of this embodiment includes the following steps:
[0058] (1) Preparation of oil-proof plant microfibrils
[0059] At room temperature, sequentially add 25kg fluorobenzoyl chloride, 50kg dimethylformamide, and 50kg plant fiber microfibrils into the reactor, stir and mix evenly, heat to 80°C, and stir at 80°C for 1h reaction; After finishing, cool to room temperature, filter the product to remove excess solvent, then wash 4 times with dichloromethane, and 4 times with ethanol. After washing, take it out and dry it at 60℃ for 24h to obtain oil-proof vegetable microfiber Silk; wherein: the diameter of the plant fiber microfibrils is 5-10um, and the length is 200-400um.
[0060] (2) Preparation of oil-proof nano cellulose
[0061] At room temperature, 500g of fluorobenzoyl chloride, 500g of dimethylformamide, and 250g of nano-cellulose crystals were added to the reactor in turn, stirred and mixed uniformly, heated t
Example Embodiment
[0069] Example 3
[0070] The preparation method of oil-proof packaging paper of this embodiment includes the following steps:
[0071] (1) Preparation of oil-proof plant microfibrils
[0072] At room temperature, sequentially add 50kg of fluorobenzoyl chloride, 100kg of dimethylformamide, and 50kg of plant fiber microfibrils into the reactor, stir and mix evenly, heat to 75°C, and stir for 1.5h at 75°C; After the reaction, cool to room temperature, filter the product, remove excess solvent, and then wash 5 times with dichloromethane, then 5 times with ethanol, take out and dry at 60°C for 24 hours to obtain oil-proof plant microfibrils; : The plant fiber microfibrils have a diameter of 5-10um and a length of 200-400um.
[0073] (2) Preparation of oil-proof nano cellulose
[0074] At room temperature, 750g of fluorobenzoyl chloride, 500g of dimethylformamide, and 250g of nano-cellulose crystals were sequentially added to the reactor, stirred and mixed uniformly, heated to 80°C, and stirr
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