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Surface-functionalized spherical nano silicon dioxide-graphene oxide/polymer-based compound tanning agent and preparation method thereof

A technology of surface functionalization and compound tanning agent, applied in small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, tanning treatment, etc., can solve the problem of chrome-free tanning agent It is difficult to meet the requirements of good use performance of finished leather, the shortage of chromium resources, toxicity and other problems

Active Publication Date: 2018-01-05
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The environmental pollution caused by the tanning industry has seriously affected the development of the tanning industry. The traditional tanning process is inseparable from chrome tanning. Chromium resources are in short supply and highly toxic. Completely abandoning chrome tanning is the fundamental solution to chrome pollution. Chromium-free or low-chrome tanning is one of the research hotspots in the global tanning industry. Most of the research at home and abroad still focuses on the development of conventional tanning agents and the improvement of application processes. It is difficult for chrome-free tanning agents developed by traditional methods to meet the requirements. Requirements for good performance of leather

Method used

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  • Surface-functionalized spherical nano silicon dioxide-graphene oxide/polymer-based compound tanning agent and preparation method thereof
  • Surface-functionalized spherical nano silicon dioxide-graphene oxide/polymer-based compound tanning agent and preparation method thereof
  • Surface-functionalized spherical nano silicon dioxide-graphene oxide/polymer-based compound tanning agent and preparation method thereof

Examples

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preparation example Construction

[0028] 2. Preparation of Graphene Oxide Nanosheets

[0029] 1 g of natural flake graphite powder (Sinopharm Chemical Reagent Co., Ltd., Spectrum Pure) was slowly added to 25 mL of concentrated sulfuric acid in an ice-water bath and stirred at a low speed, and mixed well to obtain the reaction solution ①. Weigh 5 g of potassium permanganate and add it to the reaction solution ① in batches under ice-water bath and low-speed stirring, and complete the addition within 1 hour. After the addition, react at room temperature for 2 hours until the reaction solution turns dark green to obtain the reaction solution ②. Continuously and slowly inject deionized water into the reaction solution ②, control the temperature of the reaction system below 100 °C, dilute the reaction solution ② to 80-100 mL, then add 5-10 mL 5v % hydrogen peroxide until the solution turns bright yellow, Check the pH of the supernatant to be 7, and filter while hot. The product was fully washed with 5 wt% dilute h...

Embodiment 123

[0034] Example 1 23 g of maleic anhydride was fully dissolved in 100 mL of deionized water at 75-85 °C to obtain the reaction solution ①; 0.30 g of PVA-SiO 2 -GO (the degree of polymerization of PVA is 1700; the mass ratio of PVA and tetraethyl orthosilicate is 1:2; PVA-SiO 2 (10:1 mass ratio to GO) was dissolved in 20 mL deionized water and ultrasonically treated for 30 minutes to obtain a uniform and stable reaction solution ②; the reaction solution ① and reaction solution ② were mixed evenly under stirring at 75-85 °C to obtain the reaction solution solution ③; 1.2 g of ammonium persulfate dissolved in 10 mL of deionized water and 36 mL of acrylic acid (AA) were slowly and evenly added dropwise to the reaction solution ③ at the same time. Finally, use 30 wt% sodium hydroxide solution to adjust the pH value of the product solution to 5-6, and discharge the material to obtain surface functionalized spherical nano-SiO 2 -graphene oxide / maleic anhydride-acrylic acid copolymer ...

Embodiment 223

[0035] Example 2 23 g maleic anhydride (MA) was fully dissolved in 100 mL deionized water at 75-85 °C to obtain reaction solution ①; 1.22 g PVA-SiO 2 -GO or PEG-SiO 2 -GO (the degree of polymerization of PVA is 1700; the molecular weight of PEG is 1500; the mass ratio of PVA, PEG and ethyl orthosilicate is 1:1; PVA-SiO 2 or PEG-SiO 2 The mass ratio to GO is 5:1) dissolved in 50 mL deionized water and ultrasonically treated for 30 minutes to obtain a uniform and stable reaction solution ②; the reaction solution ① and the reaction solution ② were mixed evenly under strong mechanical stirring at 75-85 °C , to obtain the reaction solution ③; 1.2 g of ammonium persulfate was dissolved in 10 mL of deionized water and 36 mL of acrylic acid (AA) and slowly and evenly added dropwise to the reaction solution ③ at the same time. After the reaction, use 30 wt% sodium hydroxide solution to adjust the pH value of the product solution to 5-6, and discharge the material to obtain surface fu...

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Abstract

The invention discloses a surface-functionalized spheroidal nano SiO2-graphene oxide / polymer-based compound tanning agent and a preparation method of the surface-functionalized spheroidal nano SiO2-graphene oxide / polymer-based compound tanning agent. The prepared novel nano compound tanning agent is good in solubleness in a water phase and is quite beneficial to permeation and absorption of tanning agent molecules. The spherical nano compound tanning agent can more easily permeate in and fill in gaps of leather collagen fibers under the effect of mechanical force of a revolving drum due to small friction resistance. When the tanning agent is used for tanning sheep wet white leather, the thickening rate of the leather can reach 189%, and the leather utilization rate is greatly improved. Theshrinkage temperature of the tanned leather can reach 80 DEG C or above, after compounding of 0.5% chrome tanning, the shrinkage temperature can reach 95 DEG C or above, hydrothermal stability of theleather is remarkably improved, and the requirement for using performance of the finished leather is met. The tanned leather has the certain electrical resistance and fire resistance. The novel nanocompound tanning agent can partially replace chrome tanning, and a novel thought and a novel method are provided for clean chrome-free tanning research.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials, in particular to a surface functionalized spherical nano-SiO 2 - Graphene oxide / polymer-based complex tanning agent and preparation method thereof. Background technique [0002] The environmental pollution caused by the tanning industry has seriously affected the development of the tanning industry. The traditional tanning process is inseparable from chrome tanning. Chromium resources are in short supply and highly toxic. Completely abandoning chrome tanning is the fundamental solution to chrome pollution. Chromium-free or low-chrome tanning is one of the research hotspots in the global tanning industry. Most of the research at home and abroad still focuses on the development of conventional tanning agents and the improvement of application processes. It is difficult for chrome-free tanning agents developed by traditional methods to meet the requirements. Requirements for good performance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C14C3/04C14C3/22C14C3/06
Inventor 潘卉王晓冬丁涛张经纬刘瑞琪
Owner HENAN UNIVERSITY
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