Method for preparing nano-composite tanning agent containing montmorillonite and silica particles

A technology of silica and compound tanning agent, applied in chemical treatment of small hide/big hide/leather/fur, small hide/big hide/leather/fur treatment, tanning treatment, etc., can solve chromium toxicity environment, Pollution, restrictions and other issues, to achieve the effect of meeting production requirements, excellent performance, and improved stability of heat and humidity resistance

Inactive Publication Date: 2010-07-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Chromium tanning agent is the most commonly used tanning agent in the leather industry. However, due to the great toxicity and environmental pollution of chromium (VI), laws and regulations in various countries all over the world have regulated chromium in leather products and waste water. The content is strictly limited

Method used

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  • Method for preparing nano-composite tanning agent containing montmorillonite and silica particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Embodiment 1: First, get 0.6g of montmorillonite and add it into a three-necked flask equipped with 70g of distilled water, stir to make montmorillonite form a uniform suspension, then add 20g of methacrylic acid and 0.2g of surface The active agent hexadecyltrimethylammonium chloride and 0.2g of nano-silica RNS-D with double bonds on the surface were stirred for 30 minutes, ultrasonically treated for 20 minutes, heated in a water bath to 60°C, stirred for 4 hours, and then heated to After 70°C, add dropwise a blend solution of 0.6g of ammonium persulfate, 0.6g of isopropanol and 10g of water. The dropping time is controlled at 30 minutes. After the addition is completed, the temperature is raised to 75°C and reacted for 3 hours. The obtained product is A nanocomposite tanning agent containing montmorillonite and silica particles.

Embodiment 2

[0010] Embodiment 2: First, get 0.6g of montmorillonite and add it into a three-necked flask equipped with 70g of distilled water, stir to make montmorillonite form a uniform suspension, then add 20g of methacrylic acid and 0.8g of surface Active agent 3-chloro-2-hydroxypropyltrimethylammonium chloride and 0.5g of nano-silica RNS-D with double bonds on the surface, stirred for 30 minutes, ultrasonically treated for 20 minutes, heated in a water bath to 60°C, stirred After 4 hours, the temperature was raised to 70°C, and a blend solution of 1.2g of ammonium persulfate, 0.6g of isopropanol and 10g of water was added dropwise, and the dropping time was controlled at 38min. After the addition was completed, the temperature was raised to 80°C, and the reaction was 2.5 h, the resulting product is a nanocomposite tanning agent containing montmorillonite and silica particles.

Embodiment 3

[0011] Embodiment 3: First, get 0.6g of montmorillonite and add it into a three-necked flask equipped with 70g of distilled water, stir to make montmorillonite form a uniform suspension, then add 20g of methacrylic acid and 0.5g of surface Active agent dodecyldimethylbenzyl ammonium chloride and 0.4g of nano-silica RNS-D with double bonds on the surface, stirred for 30min, ultrasonically treated for 20min, heated in a water bath to 60°C, stirred for 4h and then After heating up to 70°C, add dropwise a blend solution of 1.0g of ammonium persulfate, 0.6g of isopropanol and 10g of water. The dropping time is controlled at 35 minutes. After the addition is completed, the temperature is raised to 85°C and reacted for 2 hours. It is a nano-composite tanning agent containing montmorillonite and silica particles.

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Abstract

The invention relates to a method for preparing a nano-composite simultaneously containing montmorillonite and silica particles, in particular to a method for preparing nano-composite tanning agent simultaneously containing montmorillonite and silica particles by using an in-situ polymerization method. The chrome tanning agent is one of the most commonly-used tanning agent in the leather industry, however, chromium (VI) has the problems of high toxicity and environmental pollution. By introducing acrylic monomers, the nano-composite tanning agent simultaneously containing montmorillonite and silica particles is prepared from montmorillonite and nano-particles with the surface thereof containing double-bond silica by using the in-situ polymerization method. By using the nano-composite tanning agent (6%) prepared by the invention to tan pickled goat skin, the resistance of crust leather to wet heat can be increased to plus of minus 75 DEG C; and the crust leather is superior in other properties, thereby meeting the requirements for the production of wet white leather and reducing the consumption of chrome tanning agent.

Description

technical field [0001] The invention relates to a preparation method of a leather tanning agent, in particular to a preparation method of a nanocomposite tanning agent containing montmorillonite and silicon dioxide particles. Background technique [0002] Chromium tanning agent is the most commonly used tanning agent in the leather industry. However, due to the great toxicity and environmental pollution of chromium (VI), laws and regulations in various countries all over the world have regulated chromium in leather products and waste water. content is strictly limited. Therefore, the tanning industry is facing severe challenges, and the main way to solve this problem is to develop new chrome-free or chrome-less tanning agents. [0003] Montmorillonite is a 2:1 layered silicate mineral composed of two silicon-oxygen tetrahedral sheets and a layer of aluminum (magnesium) oxygen (hydroxyl) octahedral sheets sandwiched between them [Zheng Quancheng, Zhang Yan, Xu Zhizhi. Resea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/02
Inventor 鲍艳马建中徐群娜
Owner SHAANXI UNIV OF SCI & TECH
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