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Preparation method of hydrophobic oilproof paper

An oil-repellent and hydrophobic technology, applied in the field of papermaking, can solve the problems of toxic perfluorooctane sulfonamide compounds, hidden dangers of food safety and ecological environment protection, and not easy to decompose, and achieves enhanced water resistance, wide range of applicable paper types, and low cost. low effect

Active Publication Date: 2018-10-09
杭州市化工研究院有限公司 +1
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  • Claims
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Problems solved by technology

However, studies in recent years have suggested that fluorine-containing compounds pose a threat to human health. For example, the commonly used organic fluorine oil repellent will produce toxic perfluorooctyl sulfonamide (PFOS) when heated; Raw materials and intermediates are not easy to decompose in the environment, and their accumulation will also cause harm to the human body and bring hidden dangers to food safety and ecological environmental protection. Therefore, countries around the world have successively issued some policies to prohibit the use of PFOS

Method used

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  • Preparation method of hydrophobic oilproof paper

Examples

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preparation example Construction

[0054] A preparation method of hydrophobic and oil-proof paper, comprising the following steps:

[0055] 1) Base papermaking: soak bleached coniferous wood chemical pulp for 3-5 hours, beat to 60-85°SR; take 40-90 parts by weight of bleached coniferous wood chemical pulp, 10-50 parts by weight of carboxymethyl cellulose , 5-30 parts by weight of bacterial cellulose, and 2-10 parts by weight of dissolving pulp are mixed, and the papermaking quantity is 50-80 g / m 2 The hand-made sheet, the pressing condition is 450-550kPa, 3-7 min, and the base paper is made after drying.

[0056] 2) Dissolve natural polyhydroxy polymer materials (starch, chitosan, guar gum, nanocellulose, polyvinyl alcohol, water-soluble ethylene-vinyl alcohol copolymer) in water, stir and heat up to 85-95°C, keep warm Until the system is transparent, then stir and cool to room temperature to obtain a coating solution with a concentration of 3-15wt%, and apply it on the surface of the paper with a coating amou...

Embodiment 1

[0070] Preparation of bacterial cellulose:

[0071] (1) Prepare culture medium

[0072] Seed medium: glucose 5 w / v%, peptone 0.5 w / v%, citric acid 0.1 w / v%, disodium hydrogen phosphate 0.2 w / v%, potassium dihydrogen phosphate 0.1 w / v%, yeast extract 0.5 w / v%, pH=6.0, sterilized at 121°C, 0.1 MPa for 30 min.

[0073] Slant medium: glucose 5 w / v%, peptone 0.5 w / v%, citric acid 0.1 w / v%, agar 2.0 w / v%, calcium carbonate 0.05 w / v%, pH=6.0, at 121°C, Sterilize at 0.1 MPa for 30 min.

[0074] Fermentation medium: glucose 5 w / v%, peptone 0.5 w / v%, citric acid 0.1 w / v%, disodium hydrogen phosphate 0.2w / v%, potassium dihydrogen phosphate 0.1 w / v%, yeast extract 0.5 w / v%, pH=6.0, sterilized at 121°C, 0.1 MPa for 30 min.

[0075] (2) Activation of strains

[0076] The bacterial species is Acetobacter xylinum, inoculate the bacterial species into the seed medium, plug the mouth of the bottle with sterilized cotton, shake gently to disperse the seeds in the medium, and then cultivat...

Embodiment 2

[0087] Similar to the method of Example 1, the difference is that the acyl chloride petroleum ether solution changes from spraying on pre-coated paper to brushing, and the resulting paper sample is detected, and its contact angle is 124.7 (2.5 °, Cobb 30 The value is 5.87 (0.3 g / m 2 , the oil resistance level is 7, the bursting strength is 225.07 (2.3 kPa, the tensile index is 11.08 (0.4 N m / g), and the surface strength is greater than 4 m / s.

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Abstract

The invention relates to the field of papermaking and discloses a preparation method of hydrophobic oilproof paper. The preparation method includes: 1), making body paper: soaking bleached softwood chemical pulp, and pulping; mixing the bleached softwood chemical pulp, carboxymethyl cellulose, bacterial cellulose and dissolving pulp, making handsheet, and drying to obtain the body paper; 2), dissolving a natural polyhydroxy high molecular material in water, stirring, heating, holding temperature until a system is transparent, stirring, cooling to room temperature to obtain coating liquid, andcoating; 3), drying the body paper after being precoated, using an acyl chloride solution to treat the surface of the body paper, and drying to obtain a finished product. The problem that paper is porous is solved by means of coating the surface of the paper with the polyhydroxy high molecular material which is natural and easy to degrade, and an acyl chloride compound not containing fluorine is used to replace fluorine-containing polymer to endow the paper with hydrophobicity and oilproofness, so that environment friendliness is realized. In addition, paper prepared by the method has good strength performance and printability.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a method for preparing hydrophobic and oil-proof paper. Background technique [0002] The role of paper products in daily life is undoubted. As the application fields of paper products continue to expand, people's requirements for their performance are also getting higher and higher. Various paper products such as food packaging paper, baking paper, and release paper require certain paper strength and barrier properties (water, oil, and gas barrier properties). However, as the main component of paper, cellulose itself is rich in hydroxyl groups, which makes the paper have strong hydrophilicity; and there are many pores between the fibers, which makes the paper structure porous, so that the oil can be diffused and absorbed by the capillary action between the pores. Gradually penetrate the whole paper, which limits the application of paper products. Therefore, how to effectively realiz...

Claims

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Application Information

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IPC IPC(8): D21H19/12D21H19/14D21H17/69D21H17/68D21H17/29D21H17/25D21H17/26
CPCD21H17/25D21H17/26D21H17/29D21H17/68D21H17/69D21H19/12D21H19/14
Inventor 周丹丹王立军姚献平赵文彦方佳翔
Owner 杭州市化工研究院有限公司
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