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Polysiloxane and quaternary ammonium salt-containing antibacterial gelatin leather finishing agent and preparation method

A technology of leather finishing agent and polysiloxane, applied in leather surface treatment, biocide-containing paint, small leather/big leather/leather/fur treatment, etc., can solve the problems of gelatin film antibacterial property, etc., and achieve Efficient sterilization and algae killing ability, good weather resistance and strong anti-oxidation ability

Inactive Publication Date: 2013-12-11
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Traditional crosslinking, plasticization, free radical graft polymerization, blending and other modification methods (Food Hydrocolloids 2005,19: 899–907; China Leather, 2002 , 31( 5 ): 1-6; Biomaterials 2001, 22:763-768; Biomacromolecules 2010, 11, 1125–1132), locally improved abrasion resistance, toughness, water resistance, adhesion of gelatin films, but tightly cross-linked The formation of the network inhibits the soft feel and good water vapor permeability of the gelatin film itself, and does not solve the problem of poor antibacterial properties of the gelatin film

Method used

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  • Polysiloxane and quaternary ammonium salt-containing antibacterial gelatin leather finishing agent and preparation method
  • Polysiloxane and quaternary ammonium salt-containing antibacterial gelatin leather finishing agent and preparation method
  • Polysiloxane and quaternary ammonium salt-containing antibacterial gelatin leather finishing agent and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Add 12 grams of gelatin (accounting for 11.76% of the total mass) and 85 grams of deionized water into a 250ml three-neck reaction bottle equipped with a thermometer socket, a sampling port, and a condenser socket, stir and heat to 50°C. After the gelatin is completely dissolved, add 0.25mL of 3 mol / L sodium hydroxide, adjust the reaction pH to 10.0, add 8g of epoxy quaternary ammonium salt, after the reactants are not safely dissolved, continue to stir for 8 hours to prepare epoxy quaternary ammonium salt graft modified gelatin polymerization solution (Solution 1).

[0059] The infrared spectrogram of epoxy quaternary ammonium salt modified gelatin ( figure 2 ), the original 1643cm -1 The N~H absorption peak of the primary amino group disappears, and at the same time at 1475cm -1 -N(CH 3 ) 3 C-H new absorption peaks. One N-H absorption peak that appeared in the spectrum disappeared, and one ~N(CH 3 ) 3 The characteristic absorption peak of C-H on the top indica...

Embodiment 2

[0065] The described method is the same as that in Example 1, except that the mass of gelatin is changed to 3 grams (accounting for 2.83% of the total mass), the pH is changed to 6.0, and the mixture is heated and stirred to 40°C.

[0066] The viscosity of the obtained liquid is ~360 centipoise (50°C), and it is placed in a normal-pressure oven at 50°C for 6 hours to form a film with strong flexibility. The glass transition temperature (T g ) is 224℃, the T of gelatin film after modification g The temperature dropped to 196°C; the antibacterial rate of raw gelatin film against Escherichia coli was 18.3%, and that of the modified gelatin film increased to 86.2%, and the antibacterial rate increased significantly. 13 C NMR showed that the γ-C signal on the lysine and arginine molecules on the gelatin molecule in the glycidol-modified gelatin product disappeared, and new peaks appeared at 61 and 63ppm, which were - C Peaks of HOH- groups; new peaks appeared at 69 and 72ppm as...

Embodiment 3

[0069] The described method is consistent with that of Example 1, except that the mass of gelatin is changed to 16 grams (accounting for 15.09% of the total mass), the pH is changed to 12.0, and the mixture is heated and stirred to 40°C.

[0070] The viscosity of the obtained liquid is ~460 centipoise (50°C), and it is placed in a normal-pressure oven at 50°C for 6 hours to form a film with strong flexibility. The glass transition temperature (T g ) is 224℃, the T of gelatin film after modification g The antibacterial rate of raw gelatin film against Escherichia coli was 18.3%, and that of the modified gelatin film increased to 68.4%, and the antibacterial rate increased significantly. 13 C NMR showed that the γ-C signal on the lysine and arginine molecules on the gelatin molecule in the glycidol-modified gelatin product disappeared, and new peaks appeared at 61 and 63ppm, which were - C Peaks of HOH- groups; new peaks appeared at 69 and 72ppm as- C h 2 OH group peak; ...

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Abstract

The invention relates to a polysiloxane and quaternary ammonium salt-containing antibacterial gelatin leather finishing agent and a preparation method thereof. The preparation method comprises the following steps: dissolving gelatin in water to prepare aqueous solution with mass concentration of 2-20 percent; adding epoxy quaternary ammonium salt into a first reaction flask under the conditions of temperature of 40-70 DEG C and pH of 6-12 to obtain solution 1; adding a surfactant into a second reaction flask, continuously stirring, and meanwhile adding Si-O-Si repetitive unit-containing epoxypolysiloxane in batches or continuously to obtain solution 2, wherein the using amount of the surfactant is 2-20 percent of the mass of the gelatin; mixing the solution 1 and the solution 2 in different proportions, weighing 15-20 g of the mixed solution to be placed in a mold of polytetrafluoroethylene, adding 5-10 mL of one or two or three of ethanol, tetrahydrofuran and methanol and drying in a normal pressure drying oven at the temperature of 40-80 DEG C to obtain the multifunctional gelatin leather finishing agent. The finishing agent has the characteristics of antibacterial property, adjustable hydrophilia and hydrophobicity, flexible film, strong anti-oxidant capacity and the like.

Description

technical field [0001] The invention relates to a gelatin leather finishing agent, in particular to an antibacterial gelatin leather finishing agent containing polysiloxane and quaternary ammonium salt and a preparation method thereof. The leather finishing agent has the characteristics of antibacterial, adjustable hydrophilicity and hydrophobicity, anti-oxidation, etc., and is especially suitable as a finishing agent for garment leather or decorative leather. Background technique [0002] Protein finishes are important raw materials for the leather industry. The polypeptide main chain structure endows the protein coating agent with soft and natural luster, strong cohesive force and good hygienic properties such as air permeability and water vapor permeability. Gelatin is a hydrolyzed product of collagen protein, which has become an important raw material for the preparation of protein films. Like other natural polymer materials, after forming a film, this kind of protein m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D189/00C09D187/00C09D5/14C14C11/00D06M15/15D06M15/65C08H1/00C08G81/00
Inventor 许静李天铎姜青伟赵志鹏王彦涛
Owner QILU UNIV OF TECH
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