A kind of application method of modified collagen polypeptide leather filler

Abstract

The invention relates to the technical fields of leather making chemistry and engineering, and provides a method for preparing a modified collagen polypeptide leather-making filler from chrome-free multi-metal tanned leather shavings. The method of leather filler can reduce the environmental pollution caused by tanning, solve the problem of difficulty in handling leather scraps in enterprises, and at the same time can save resources, save the cost of tanning, and improve the economic benefits of enterprises; the modified collagen polypeptide prepared by the method The tanning filler has moderate molecular weight, high hydrolysis yield, positive electricity and antibacterial and mildew resistance. It can avoid the discoloration of leather when applied in the tanning process, and can promote the absorption of other anionic materials in the tanning process. Moldy.

Description

technical field

[0001] The invention relates to the technical field of leather making chemistry and engineering, in particular to an application method of a modified collagen polypeptide leather filling agent. Background technique

[0002] The disposal of tannery shavings is one of the major difficulties faced by tannery enterprises. According to the traditional tanning process, nearly 30% of the raw hide quality during the tanning process will be converted into leather shavings and other leather solid wastes, including chrome-containing solid waste. Waste and chrome-free solid waste, around 600,000 leather wastes are generated worldwide each year. These leather wastes are rich in collagen, but they are not well utilized, and are mostly disposed of by incineration and landfilling, which wastes resources and pollutes the environment. The leather shavings are prepared into a leather filler, which is taken from the leather and used for the leather, and the leather filler has l...

Examples

Embodiment 1

[0020] A method for preparing modified collagen polypeptide leather-making filler from chrome-free multi-metal tanned leather scraps, comprising the following steps in turn:

[0021] Step (1) Hydrolysis of leather scraps: take a certain amount of leather scraps and place them in a reactor, and based on the quality of leather scraps, add 1% surfactant, 0.5% degreaser, 10 times water to soak and stir the leather scraps for 2 hours, Drain the water and wash it twice with water; add 15% oxalic acid, 7.5 times water, stir and react at 90°C for 8h, filter and dry to obtain collagen polypeptide;

[0022] Step (2) Collagen polypeptide modification: add a certain amount of collagen polypeptide into the reactor, add 3 times of water to dissolve, add 100% absolute ethanol while stirring, add 20% triethylamine, add 40% tetrahydroxymethyl quaternary phosphorus salt, adjust the pH to 7, and stir for 6 hours at 30 °C; after the reaction is completed, let it stand for 24 hours to obtain a mod...

Embodiment 2

[0024] A method for preparing modified collagen polypeptide leather-making filler from chrome-free multi-metal tanned leather scraps, comprising the following steps in turn:

[0025] Step (1) Hydrolysis of leather scraps: take a certain amount of leather scraps and place them in a reactor. Based on the quality of leather scraps, add 2% surfactant, 0.2% degreaser, and 15 times water to soak and stir the leather scraps for 5 hours. Drain the water and wash it twice with water; add 20% oxalic acid, 10 times water, stir at 80°C for 5 hours, adjust the temperature, stir at 60°C for 5 hours, filter and dry to obtain collagen peptides;

[0026] Step (2) Collagen polypeptide modification: add a certain amount of collagen polypeptide into the reactor, add 5 times water to dissolve based on the quality of collagen polypeptide; take 100% vinyl-containing quaternary ammonium salt in the container, add vinyl-containing 100% water of the mass of quaternary ammonium salt, add ammonium persul...

Embodiment 3

[0028] A method for preparing modified collagen polypeptide leather-making filler from chrome-free multi-metal tanned leather scraps, comprising the following steps in turn:

[0029] Step (1) Hydrolysis of leather scraps: take a certain amount of leather scraps and place them in the reactor, and based on the quality of leather scraps, add 0.5% surfactant, 1% degreaser, and 8 times water to soak and stir the leather scraps for 1 hour, Drain the water and wash it twice with water; add 10% oxalic acid, 15 times water, stir at 70°C for 4 hours, 50°C for 6 hours, 30°C for 8 hours, filter and dry to obtain collagen peptides;

[0030] Step (2) Modification of collagen polypeptide: add a certain amount of collagen polypeptide into the reactor, add 5 times of water to dissolve based on the quality of collagen polypeptide; take 50% of vinyl-containing quaternary ammonium salt into the container, add vinyl-containing Water containing 100% of the mass of the quaternary ammonium salt, addi...

technical field

[0001] The invention relates to the technical field of leather making chemistry and engineering, in particular to an application method of a modified collagen polypeptide leather filling agent. Background technique

[0002] The disposal of tannery shavings is one of the major difficulties faced by tannery enterprises. According to the traditional tanning process, nearly 30% of the raw hide quality during the tanning process will be converted into leather shavings and other leather solid wastes, including chrome-containing solid waste. Waste and chrome-free solid waste, around 600,000 leather wastes are generated worldwide each year. These leather wastes are rich in collagen, but they are not well utilized, and are mostly disposed of by incineration and landfilling, which wastes resources and pollutes the environment. The leather shavings are prepared into a leather filler, which is taken from the leather and used for the leather, and the leather filler has l...

Examples

Embodiment 1

[0020] A method for preparing modified collagen polypeptide leather-making filler from chrome-free multi-metal tanned leather scraps, comprising the following steps in turn:

[0021] Step (1) Hydrolysis of leather scraps: take a certain amount of leather scraps and place them in a reactor, and based on the quality of leather scraps, add 1% surfactant, 0.5% degreaser, 10 times water to soak and stir the leather scraps for 2 hours, Drain the water and wash it twice with water; add 15% oxalic acid, 7.5 times water, stir and react at 90°C for 8h, filter and dry to obtain collagen polypeptide;

[0022] Step (2) Collagen polypeptide modification: add a certain amount of collagen polypeptide into the reactor, add 3 times of water to dissolve, add 100% absolute ethanol while stirring, add 20% triethylamine, add 40% tetrahydroxymethyl quaternary phosphorus salt, adjust the pH to 7, and stir for 6 hours at 30 °C; after the reaction is completed, let it stand for 24 hours to obtain a mod...

Embodiment 2

[0024] A method for preparing modified collagen polypeptide leather-making filler from chrome-free multi-metal tanned leather scraps, comprising the following steps in turn:

[0025] Step (1) Hydrolysis of leather scraps: take a certain amount of leather scraps and place them in a reactor. Based on the quality of leather scraps, add 2% surfactant, 0.2% degreaser, and 15 times water to soak and stir the leather scraps for 5 hours. Drain the water and wash it twice with water; add 20% oxalic acid, 10 times water, stir at 80°C for 5 hours, adjust the temperature, stir at 60°C for 5 hours, filter and dry to obtain collagen peptides;

[0026] Step (2) Collagen polypeptide modification: add a certain amount of collagen polypeptide into the reactor, add 5 times water to dissolve based on the quality of collagen polypeptide; take 100% vinyl-containing quaternary ammonium salt in the container, add vinyl-containing 100% water of the mass of quaternary ammonium salt, add ammonium persul...

Embodiment 3

[0028] A method for preparing modified collagen polypeptide leather-making filler from chrome-free multi-metal tanned leather scraps, comprising the following steps in turn:

[0029] Step (1) Hydrolysis of leather scraps: take a certain amount of leather scraps and place them in the reactor, and based on the quality of leather scraps, add 0.5% surfactant, 1% degreaser, and 8 times water to soak and stir the leather scraps for 1 hour, Drain the water and wash it twice with water; add 10% oxalic acid, 15 times water, stir at 70°C for 4 hours, 50°C for 6 hours, 30°C for 8 hours, filter and dry to obtain collagen peptides;

[0030] Step (2) Modification of collagen polypeptide: add a certain amount of collagen polypeptide into the reactor, add 5 times of water to dissolve based on the quality of collagen polypeptide; take 50% of vinyl-containing quaternary ammonium salt into the container, add vinyl-containing Water containing 100% of the mass of the quaternary ammonium salt, addi...