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Long-acting anti-microbial leather and preparing method thereof

A leather and long-acting technology, applied in the field of long-acting antibacterial leather and its preparation, can solve the problems of lack of long-acting antibacterial stability and the like, and achieve the effects of easy implementation, simple preparation method and less demanding process requirements.

Active Publication Date: 2017-11-17
深圳市左右家私有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of leather also does not have long-term antibacterial stability

Method used

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  • Long-acting anti-microbial leather and preparing method thereof
  • Long-acting anti-microbial leather and preparing method thereof
  • Long-acting anti-microbial leather and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Mix 1 mole part of gallic acid and 1 mole part of silver nitrate to make an aqueous solution, slowly drop into water with a pH value of 11 at 25 ° C, and react in the dark for 30 minutes, and adjust the pH value of the solution system to neutral , adding heptanediamine to make the final concentration 10-14mM, and then adding butylamine to make the final concentration 8-15mM, finally preparing the nano-silver solution modified by gallic acid. Wherein, the silver-containing solid content is 1000ppm. Such as figure 1 As shown, the transmission electron microscope (TEM) scanning results show that the average particle size of the nano-silver is 6nm, and it can be stored stably at room temperature for more than 180 days without precipitation.

[0035] Escherichia coli (ATCC25922) and Staphylococcus aureus (ATCC6538) were used as bacterial models. First, prepare nano-silver solutions with concentrations of 50ppm, 30ppm, 20ppm, 10ppm, and 5ppm, and sterile water as a blank re...

Embodiment 2

[0037] Utilize the nano-silver modified by the gallic acid obtained in Example 1 to prepare long-acting antibacterial leather:

[0038]After weighing the raw sheep skin, tanning is carried out according to the tanning process shown in Table 1 to obtain sheep wet blue leather filled with and fixed nano-silver; The weight of the skin is the same, and the content of nano-silver modified by gallic acid (hereinafter referred to as nano-silver) is 200ppm; when the nano-silver is filled between the leather collagen fibers, the chrome tanning agent in the leather chemically fixes the nano-silver on the leather through covalent complexation. Collagen fibers; Finally, wet blue leather containing nano-silver is made, which has the characteristics of "nano-silver sponge" and has long-term antibacterial effect (such as Figure 6 schematic diagram shown).

[0039]

[0040]

[0041] The prepared sheepskin wet blue leather containing nano-silver was sectioned, and its section layer was...

Embodiment 3

[0048] The prickly-acid hides are weighed after being squeezed with water, and then the weight is increased by 50% as the raw material benchmark. Carry out tanning with reference to the technology shown in table 3, make the cowhide vegetable tanned leather of filling and fixing nano silver; The nano-silver content is 150ppm; when the nano-silver modified by gallic acid is filled between the leather collagen fibers, the vegetable tannin contained in the vegetable tanning agent in the leather can form a hydrogen bond with the gallic acid on the surface of the nano-silver, and then Nano-silver is chemically fixed on the skin collagen fibers; finally, vegetable-tanned leather containing nano-silver is obtained, which has the characteristics of "nano-silver sponge" and has long-term antibacterial effect.

[0049]

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Abstract

The invention provides a preparing method of long-acting anti-microbial leather. According to the preparing method, after tanning is carried out, before washing is carried out, a nano-silver solution modified by gallic acid is added, the adding amount is 50% to 120% of the weight of animal fur, the grain diameter of the nano-silver modified by the gallic acid is 4 nm to 10 nm, and the concentration of the nano-silver modified by the gallic acid in the nano-silver solution modified by the gallic acid is 150 ppm to 5000 ppm. After the long-acting anti-microbial leather is washed with a solution with the soap concentration being 1 g / L at 40 DEG C at least three times, washing is carried out 60 minutes each time, the excellent anti-microbial effect still exists. The preparing method is simple, the process requirement is not strict, and implementation is easy.

Description

technical field [0001] The invention belongs to the technical field of antibacterial leather preparation, and in particular relates to a long-acting antibacterial leather and a preparation method thereof. Background technique [0002] As an antibacterial material, nanosilver has the advantages of antibacterial persistence and broad-spectrum bactericidal properties, is not easy to produce bacterial resistance, and is environmentally friendly and low-toxicity. It has been widely used in the fields of biomedicine and textile finishing (Hu Yunrui, nanosilver and its composite antibacterial materials Research, 2013, doctoral dissertation of South China University of Technology). [0003] Among the many methods for preparing nano-silver, the chemical reduction method is widely used due to its advantages of simple operation, low cost, and convenience for large-scale production. Most of the reducing agents used are sodium borohydride, reducing glucose and oxime reducing agents (Li ...

Claims

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Application Information

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IPC IPC(8): C14C13/00C14C1/00C14C1/04C14C1/06C14C1/08C14C3/28C14C3/06C14C3/10C14C3/16C14C11/00A01N59/16A01N25/22A01P1/00
CPCA01N25/22A01N59/16C14C1/00C14C1/04C14C1/06C14C1/08C14C3/06C14C3/10C14C3/16C14C3/28C14C11/00C14C13/00
Inventor 刘公岩李开军向俊
Owner 深圳市左右家私有限公司
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