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Environment-friendly fluoride-free waterproofing agent as well as preparation method and application thereof

A fluorine-free water repellent, an environmentally friendly technology, applied in antifouling/underwater coatings, fireproof coatings, transportation and packaging, etc., can solve the problems of narrow application areas, achieve low cost, wide and rich raw material sources, and hot water resistance The effect of outstanding permeability

Pending Publication Date: 2021-02-19
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these types of packaging boxes have more restrictions and narrow application areas

Method used

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  • Environment-friendly fluoride-free waterproofing agent as well as preparation method and application thereof
  • Environment-friendly fluoride-free waterproofing agent as well as preparation method and application thereof
  • Environment-friendly fluoride-free waterproofing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of environment-friendly fluorine-free waterproofing agent:

[0043] Put polymethylhydrogensiloxane, sodium dodecylbenzenesulfonate as emulsifier, tetradecyl acrylate as thickener (mass ratio 8:1:1) in a beaker, stir and dissolve at 45°C, Add an equal volume of deionized water preheated to 45°C, and stir at a high speed under ultrasonic waves to obtain a methyl hydrogen-containing siloxane emulsion;

[0044] Put diphenylsilanediol, sodium dodecylbenzenesulfonate as emulsifier, tetradecyl acrylate as thickener (mass ratio 8:1:1) in a beaker, stir and dissolve at 45°C, add An equal volume of deionized water preheated to 45°C was stirred at high speed under ultrasonic waves to obtain a hydroxysilane emulsion;

[0045] Put carboxypolyethylene glycol silane, sodium dodecylbenzenesulfonate as emulsifier, tetradecyl acrylate as thickener (mass ratio 8:1:1) in a beaker, stir and dissolve at 45°C, add An equal volume of deionized water preheated to 45°C was stirred ...

Embodiment 2

[0048] The preparation of plant fiber degradable and environmentally friendly packaging lunch boxes can use the existing preparation methods of conventional plant cellulose degradable lunch boxes, or refer to the following preparation process: dry the agricultural straw and bagasse raw materials, and sieve them out after drying. The sand and heavy impurities mixed in the raw materials are crushed into pieces and mixed evenly at a mass ratio of 9:1 to facilitate pulping. The crushed raw materials are steamed in hot water (100°C for half an hour), squeezed and put into the pulp tank. Add a large amount of clean water, the mass ratio of water to material is about 25:1, add 16% sodium hydroxide aqueous solution, the total amount added is one-fifth of the water volume, and add anthraquinone reagent, which helps to improve cooking efficiency Its mass is 0.1% of water. After boiling, continue cooking and stirring for 3 hours to dissolve the plant cellulose in the raw material, separat...

Embodiment 3

[0050] Degradation performance test of the prepared plant fiber degradable environmental protection packaging lunch box

[0051] The biodegradability of the lunch box prepared in Example 2 was tested and analyzed according to the composting results of the outdoor field. Firstly, the lunch box is buried in the organic soil obtained by mixed biodegradation (the compost is obtained from the compost produced by organic matter in municipal solid waste), and the biodegradation test is carried out on the lunch box. The compost decomposition method characterizes the biodegradability index of the lunch box, such as Table 1, including mass loss rate, biodegradation rate and CO 2 amount released. Table 1 shows that the plant fiber degradable environmental protection packaging lunch box in the present invention has good biodegradability and will not cause pollution pressure to the ecological environment after use.

[0052] Table 1 Degradation performance index of plant fiber degradable ...

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Abstract

The invention discloses an environment-friendly fluoride-free waterproofing agent as well as a preparation method and application thereof. The waterproofing agent is mainly prepared from the followingraw materials in parts by weight: silicon-carbon compound copolymer waterproofing agent mother liquor, a stabilizer, an acidity regulator and water, wherein the silicon-carbon compound copolymer waterproofing agent mother liquor is mainly formed by mixing a methyl hydrogen-containing siloxane emulsion, a hydroxyl silane emulsion and a carboxyl silane emulsion, and the stabilizer is mainly formedby mixing ethanolamine and a cross-linking agent. The fluoride-free waterproofing agent capable of replacing a traditional fluorine-containing waterproof agent is prepared. When the fluoride-free waterproofing agent is added into material primary pulp for preparing a meal box, a finished product is environmentally friendly, healthy and excellent in waterproof performance, a plant fiber degradableenvironment-friendly packaging meal box prepared through the optimized preparation technology is economical, safe and environmentally friendly, the meal box is outstanding in waterproof performance, mechanical performance, sealing performance and hot water permeability resistance, meanwhile, the degradable performance is excellent, and the environmental pollution pressure caused by a plastic packaging material can be relieved.

Description

technical field [0001] The invention relates to an environment-friendly water repellant, in particular to an environment-friendly fluorine-free water repellent, a preparation method thereof and an application in the preparation of plant fiber degradable environment-friendly packaging lunch boxes. Background technique [0002] Waterproofing agent is an important material additive, which can endow the material with waterproof, breathable and other properties. According to the survey, the most waterproofing agents on the market are usually fluorine-containing waterproofing agents, including fluoride PFOA (perfluorooctanesulfonyl compound) , PFOS (perfluorooctanoic acid ammonium, etc.), these two substances are difficult to decompose, and easy to accumulate in the body, have serious hazards to human body, animals, environment, etc., so there is an urgent need to develop an environmentally friendly fluorine-free waterproof agent with good waterproof performance instead. [0003] ...

Claims

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Application Information

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IPC IPC(8): C08L83/05C08L71/02C08K5/5419C08K5/17C08K5/092C08K5/101C08L97/02C09D7/65C09D7/63C09D5/16B65D65/46
CPCC08L83/04C08L71/02C08K5/5419C08K5/17C08K5/092C08K5/101C08L97/02C09D5/1687C09D5/18B65D65/466C08L2201/06C08L2201/08C08L2205/03
Inventor 黄和沈宝星徐晴张平付永前马成功吴季纯
Owner NANJING NORMAL UNIVERSITY
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