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Method for preparing vinyl polymer/inorganic nanoparticle composite tanning agent by in-situ cyclopolymerization method

An inorganic nanoparticle, cyclization polymerization technology, applied in small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, animal husbandry, etc. Pollution and other problems, to achieve the effect of obvious thickening, high exhaustion rate and good physical and mechanical properties

Inactive Publication Date: 2012-11-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional chrome tanning method has brought serious environmental pollution, Cr 6+ It will directly cause damage to human skin and induce various diseases
As the main tanning method, chrome tanning is already facing enormous pressure and challenges

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1, 1) First, 2.5g of inorganic nanoparticles TiO 2 Add 40g of dimethyl diallyl ammonium chloride into a three-necked flask and disperse in a water bath at 70°C for 30 minutes to obtain a mixture;

[0014] 2) Second, 5gNaHSO 3 Dissolve it with 10g of distilled water and add it to the mixture in the three-necked flask. Mix 6g of acrylamide, 5g of hydroxyethyl acrylate, and 50g of acrylic acid evenly to obtain a mixed monomer and add it to a constant pressure dropping funnel. Take 10g of the initiator ammonium persulfate and dissolve it in 50g of Add another dropping funnel to the distilled water;

[0015] 3) Finally, add the mixed monomer and initiator dropwise to the three-necked flask at the same time, and the dropwise addition is completed in half an hour, react at a constant temperature of 70°C for 4 hours, cool, and adjust the pH to 3 with 40% NaOH to obtain vinyl Polymer-like / inorganic nanoparticle composite tanning agent.

Embodiment 2

[0016] Example 2, 1) First, add 2g of inorganic nanoparticles ZnO and 30g of dimethyl diallyl ammonium chloride into a three-necked flask and disperse in a water bath at 60°C for 30 minutes to obtain a mixture;

[0017] 2) Second, 2gNaHSO 3 After dissolving with 4g of distilled water, add it to the mixture in the three-necked flask, mix 8g of acrylamide, 7g of hydroxyethyl acrylate, and 30g of acrylic acid evenly to obtain a mixed monomer and add it to a constant pressure dropping funnel, take 4g of the initiator ammonium persulfate and dissolve it in 20g Add another dropping funnel to the distilled water;

[0018] 3) Finally, add the mixed monomer and initiator dropwise to the three-necked flask at the same time, and the dropwise addition is completed in half an hour, react at a constant temperature of 60°C for 4 hours, cool, and adjust the pH to 3.5 with 40% NaOH to obtain vinyl Polymer-like / inorganic nanoparticle composite tanning agent.

Embodiment 3

[0019] Example 3, 1) First, 3.5g of inorganic nanoparticles SiO 2 Add 35g of dimethyl diallyl ammonium chloride into a three-necked flask and disperse in a water bath at 65°C for 30 minutes to obtain a mixture;

[0020] 2) Second, 3gNaHSO 3 Dissolved with 6g of distilled water and added to the mixture in the three-necked flask, mixed 7g of acrylamide, 8g of hydroxyethyl acrylate, and 40g of acrylic acid to obtain a mixed monomer and added to a constant pressure dropping funnel to take 10, 4, 6, 8, 5g Initiator ammonium persulfate is dissolved in the distilled water of 30g and adds another dropping funnel;

[0021]3) Finally, add the mixed monomer and initiator dropwise into the three-necked flask at the same time, and the dropwise addition is completed in half an hour, react at a constant temperature of 65°C for 3.5 hours, cool, and adjust the pH to 5.5 with 40% NaOH to obtain vinyl Polymer-like / inorganic nanoparticle composite tanning agent.

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PUM

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Abstract

The invention discloses a method for preparing a vinyl polymer / inorganic nanoparticle composite tanning agent by an in-situ cyclopolymerization method. The vinyl polymer / inorganic nanoparticle composite tanning agent is prepared from dimethyl diallyl ammonium chloride, vinyl monomer and inorganic nanoparticles serving as raw materials by the in-situ cyclopolymerization method. The nanoparticle composite tanning agent has certain tanning effect and can increase absorption ratio of chrome-tanning liquid waste and enhance the dyeing and fat-liquoring effect when combined with 2 percent chrome powder to taw pickled raw sheep skin; the thickness of the finished leather is obviously increased after the tanning; the physical and mechanical performance is superior, and the finished leather is endowed with certain antibacterial and anti-ultraviolet performance; and thus the nano composite tanning agent is environment-friendly. The invention provides a new method for preparing the polymer-basednano tanning agent by the in-situ cyclopolymerization method; and the prepared nano composite tanning agent can reduce the using amount of a conventional chromium tanning agent by 75 percent; and therefore, the method is clean tanning technology which can reduce the chromium pollution from the source and has important practical significance.

Description

technical field [0001] The invention belongs to the technical field of leather chemical industry, in particular to an in-situ cyclopolymerization method for preparing a vinyl polymer / inorganic nano particle composite tanning agent. Background technique [0002] With the rapid development of the leather industry in our country, our country has become the manufacturing center and trading center of the world's leather industry. my country's tanning industry produces about 200 million pieces of leather every year, covering about 640 million square meters. In 2008, the total industrial output value of enterprises above designated size in the leather, fur and products industry was 561.1 billion yuan, and foreign exchange earnings from exports reached 42.53 billion US dollars. However, while the tanning industry is speeding up my country's economic development, it also brings some problems, such as environmental pollution and anti-dumping investigations on export products, etc., wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F226/04C08F220/56C08F220/28C08K3/22C08K3/36C08K3/34C14C3/22C14C3/06
Inventor 马建中李运高党鸽吕斌
Owner SHAANXI UNIV OF SCI & TECH
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