A kind of paper hydrophobic modifier, its preparation method and application

A hydrophobic modifier, paper technology, applied in the direction of paper, water repellent addition, chemical modification of natural resin, etc., can solve the problem that paper cannot be effectively hydrophobic for a long time, and achieve good mechanical strength, thermal stability, and production efficiency. The effect of high, high production cost

Active Publication Date: 2022-03-29
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that paper cannot be effectively hydrophobic for a long time in the prior art, the present invention provides a paper hydrophobic modifier, its preparation method and its application

Method used

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  • A kind of paper hydrophobic modifier, its preparation method and application
  • A kind of paper hydrophobic modifier, its preparation method and application
  • A kind of paper hydrophobic modifier, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Grind 50g of rosin (first grade) into powder, dissolve it in 300ml of isopropanol and put it into a 500ml three-necked flask equipped with a mechanical stirrer, reflux condenser and nitrogen inlet, then add 6.6g of sodium hydroxide and heat up to 60°C to keep the temperature After 30 minutes, 15.3 g of epichlorohydrin was added into the three-necked flask, and the temperature was raised to 80° C. for 6 hours. Washed with water, dried, and reduced pressure to obtain a light yellow viscous liquid. Weigh 50g of light yellow viscous liquid and 29.8g of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and dissolve it in 350ml of N,N-dimethylformamide, stir well and add 0.3g of triphenylphosphine, heat up to 135°C for 4 hours, then add 34.1g of propyl triethoxysilane isocyanate, stir evenly, add 0.3g of dibutyltin dilaurate, continue to react for 6 hours, and remove the solvent by rotary evaporation A paper hydrophobic modifier is obtained.

[0029] The infrared spectrum ...

Embodiment 2

[0031] Weigh 1g of paper hydrophobic modifier and dissolve it in 19g of n-hexane, add dropwise 0.01g of deionized water and 0.003g of ammonia water (containing 25wt% ammonia) while stirring to form an emulsion, after standing for 2h, the paper (90mm slow qualitative Filter paper, thickness 0.3-0.5mm, Shanghai Aladdin) was soaked in the emulsion overnight, and then the paper was put into a hot press machine, and the pressure was 20MPa, and the temperature was 100°C, and hot pressing was performed for 1h to obtain hydrophobic paper.

Embodiment 3

[0033] Weigh 2g of paper hydrophobic modifier and dissolve it in 18g of n-hexane, add dropwise 0.02g of deionized water and 0.006g of ammonia water (containing ammonia 25wt%) while stirring to form an emulsion, and after standing for 2h, the paper (90mm slow speed qualitative Filter paper, thickness 0.3-0.5mm, Shanghai Aladdin) was soaked in the emulsion overnight, and then the paper was put into a hot press machine, and the pressure was 20MPa, and the temperature was 100°C, and hot pressing was performed for 1h to obtain hydrophobic paper.

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Abstract

The invention discloses a paper hydrophobic modifying agent, its preparation method and its application. A paper hydrophobic modifying agent, its structural formula is: wherein R is rosin or its derivatives. The present invention prepares the paper hydrophobic modifier by the reaction of rosin or its derivatives, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and silane coupling agent, which can The paper is compounded and modified, and through the synergistic effect, the hydrophobic and flame-retardant paper is obtained, and at the same time, it has good mechanical strength.

Description

technical field [0001] The invention relates to a paper hydrophobic modifier, a preparation method and application thereof, and belongs to the field of energy-saving and environment-friendly new materials. Background technique [0002] Packaging materials are closely related to our lives. As one of the most commonly used packaging materials, although plastics bring convenience to social production and life, they can easily cause environmental pollution due to their refractory characteristics. [0003] Paper and cardboard have many economic and environmental advantages such as extensive raw material resources, light weight, low cost, safety and harmlessness, recyclability, and easy disposal. They are green packaging materials and have broad application prospects. However, paper materials have problems such as easy water absorption, flammability, and a significant decrease in strength after water absorption, which limits the further application of paper. At present, the exist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16D21H21/34D21H17/62D21H25/06D21H27/10C09F1/04
CPCD21H21/16D21H21/34D21H17/62D21H25/06D21H27/10C09F1/04
Inventor 徐徐孙鹏昊董阜豪钱约翰黄真孙彬张双胜王石发
Owner NANJING FORESTRY UNIV
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