Graphene oxide/iron nanocomposite tanning agent and preparation method thereof

Abstract

The invention discloses a graphene oxide / iron nanometer composite tanning agent. The tanning agent is prepared from the following materials by mass: 40 to 50 parts of graphene oxide nanosheet dispersion liquid, 30 to 40 parts of ferric sulfate, 10 to 20 parts of alkalizer solution and 0.5 to 1 part of dispersant. The invention further discloses a preparation method for the graphene oxide / iron nanometer composite tanning agent. As a tanning agent, when the solid usage amount of the graphene oxide / iron nanometer composite tanning agent is 6% of the weight of leather, the shrinkage temperature of the leather tanned by the tanning agent is up to 118 DGE C; the absorptivity of the iron tanning agent reaches 96%; the shrinkage temperature of the tanned leather almost does not decrease after washing 10 times and decreases by 4% after washing 20 times; results of aging resistance test show that the tanned leather has stable performance; the problems of embrittlement and hardening of leather tanned by traditional iron tanning agents in the process of storage are avoided; and the tanned leather has good softness, elasticity and fullness.

Description

technical field

[0001] The invention belongs to the technical field of preparation of leather tanning agents, and in particular relates to a graphene oxide / iron nanocomposite tanning agent and a preparation method thereof. Background technique

[0002] Leather tanning agent is a chemical substance that can turn raw hide into leather. In theory, it can be used as chrome tanning agent, zirconium tanning agent, titanium tanning agent, aluminum tanning agent, iron tanning agent, vegetable tanning agent, Aldehyde tanning agents, etc. In fact, because chrome tanning agents have the best overall performance in tanning leather, only chrome tanning agents have been widely used. At present, chrome tanning agents account for about 90% of leather output (Wang Weijie, Liao Xuepin, Shi Bi. Green tea vice Extraction of tea polyphenols in tea and its application in tanning. China Leather, 2014,43(1):11-14; Chattopadhyay B, Aich A, Mukhopadhyay S K. Chromium in the Tanning Industry: An Odyss...

Examples

preparation example Construction

[0020] The preparation method of the graphene oxide nanosheet dispersion liquid is as follows: slowly add 3 to 5 parts of graphite powder into 80 to 100 parts of concentrated sulfuric acid with a mass fraction of 98%, control the temperature of the system at 0 to 5°C, and stir After uniformity, slowly add 10-15 parts of potassium permanganate to react for 3-4 hours, then raise the temperature to 30-40°C and continue the reaction for 2-2.5 hours, then slowly add 150-180 parts of deionized water, and heat up to 80-90 ℃ for 1 to 2 hours; then lower the temperature to 30 ℃ to 35 ℃, add dropwise 35 to 40 parts of hydrogen peroxide solution with a mass fraction of 30%, react for 1 to 1.5 hours, and ultrasonically disperse for 1 to 1.5 hours to prepare graphene oxide nanosheet dispersion Liquid, the graphene oxide nanosheet dispersion contains 1% to 1.2% of graphene oxide sheet; because the preparation process of the graphene oxide nanosheet dispersion is relatively complicated, it is...

Embodiment 1

[0028] Step 1: Preparation of graphene oxide nanosheet dispersion:

[0029]Slowly add 3 parts of graphite powder to 80 parts of concentrated sulfuric acid with a mass fraction of 98%, control the temperature of the system at 0°C, stir evenly, slowly add 10 parts of potassium permanganate to react for 3 hours, and then raise the temperature to 30°C Continue to react for 2 hours, then slowly add 150 parts of deionized water, raise the temperature to 80°C for 1 hour; then cool down to 30°C, add 35 parts of 30% hydrogen peroxide solution dropwise, react for 1 hour, and ultrasonically disperse for 1 hour to prepare The graphene oxide nanosheet dispersion liquid is controlled to contain 1% of the graphene oxide sheet layer in the graphene oxide nanosheet dispersion liquid.

[0030] Step 2: Preparation of alkalizing agent solution:

[0031] The alkalizing agent solution is a solution formed by dissolving 15 parts of sodium bicarbonate in 20 parts of deionized water.

[0032] Step 3...

Embodiment 2

[0037] Step 1: the preparation method of graphene oxide nanosheet dispersion liquid:

[0038] Slowly add 5 parts of graphite powder to 100 parts of concentrated sulfuric acid with a mass fraction of 98%, control the temperature of the system at 5°C, stir well and slowly add 15 parts of potassium permanganate to react for 4 hours, and then heat up to 40°C Continue to react for 2.5 hours, then slowly add 180 parts of deionized water, raise the temperature to 90°C and react for 2 hours; then cool down to 35°C and add 40 parts of 30% hydrogen peroxide solution dropwise, react for 1.5 hours, and ultrasonically disperse for 1.5 hours to prepare The graphene oxide nanosheet dispersion liquid is controlled to contain 1.1% of the graphene oxide sheet layer in the graphene oxide nanosheet dispersion liquid.

[0039] Step 2: Preparation of alkalizing agent solution:

[0040] The alkalizing agent solution is a solution formed by dissolving 8 parts of sodium carbonate in 20 parts of deion...

technical field

[0001] The invention belongs to the technical field of preparation of leather tanning agents, and in particular relates to a graphene oxide / iron nanocomposite tanning agent and a preparation method thereof. Background technique

[0002] Leather tanning agent is a chemical substance that can turn raw hide into leather. In theory, it can be used as chrome tanning agent, zirconium tanning agent, titanium tanning agent, aluminum tanning agent, iron tanning agent, vegetable tanning agent, Aldehyde tanning agents, etc. In fact, because chrome tanning agents have the best overall performance in tanning leather, only chrome tanning agents have been widely used. At present, chrome tanning agents account for about 90% of leather output (Wang Weijie, Liao Xuepin, Shi Bi. Green tea vice Extraction of tea polyphenols in tea and its application in tanning. China Leather, 2014,43(1):11-14; Chattopadhyay B, Aich A, Mukhopadhyay S K. Chromium in the Tanning Industry: An Odyss...

Examples

preparation example Construction

[0020] The preparation method of the graphene oxide nanosheet dispersion liquid is as follows: slowly add 3 to 5 parts of graphite powder into 80 to 100 parts of concentrated sulfuric acid with a mass fraction of 98%, control the temperature of the system at 0 to 5°C, and stir After uniformity, slowly add 10-15 parts of potassium permanganate to react for 3-4 hours, then raise the temperature to 30-40°C and continue the reaction for 2-2.5 hours, then slowly add 150-180 parts of deionized water, and heat up to 80-90 ℃ for 1 to 2 hours; then lower the temperature to 30 ℃ to 35 ℃, add dropwise 35 to 40 parts of hydrogen peroxide solution with a mass fraction of 30%, react for 1 to 1.5 hours, and ultrasonically disperse for 1 to 1.5 hours to prepare graphene oxide nanosheet dispersion Liquid, the graphene oxide nanosheet dispersion contains 1% to 1.2% of graphene oxide sheet; because the preparation process of the graphene oxide nanosheet dispersion is relatively complicated, it is...

Embodiment 1

[0028] Step 1: Preparation of graphene oxide nanosheet dispersion:

[0029]Slowly add 3 parts of graphite powder to 80 parts of concentrated sulfuric acid with a mass fraction of 98%, control the temperature of the system at 0°C, stir evenly, slowly add 10 parts of potassium permanganate to react for 3 hours, and then raise the temperature to 30°C Continue to react for 2 hours, then slowly add 150 parts of deionized water, raise the temperature to 80°C for 1 hour; then cool down to 30°C, add 35 parts of 30% hydrogen peroxide solution dropwise, react for 1 hour, and ultrasonically disperse for 1 hour to prepare The graphene oxide nanosheet dispersion liquid is controlled to contain 1% of the graphene oxide sheet layer in the graphene oxide nanosheet dispersion liquid.

[0030] Step 2: Preparation of alkalizing agent solution:

[0031] The alkalizing agent solution is a solution formed by dissolving 15 parts of sodium bicarbonate in 20 parts of deionized water.

[0032] Step 3...

Embodiment 2

[0037] Step 1: the preparation method of graphene oxide nanosheet dispersion liquid:

[0038] Slowly add 5 parts of graphite powder to 100 parts of concentrated sulfuric acid with a mass fraction of 98%, control the temperature of the system at 5°C, stir well and slowly add 15 parts of potassium permanganate to react for 4 hours, and then heat up to 40°C Continue to react for 2.5 hours, then slowly add 180 parts of deionized water, raise the temperature to 90°C and react for 2 hours; then cool down to 35°C and add 40 parts of 30% hydrogen peroxide solution dropwise, react for 1.5 hours, and ultrasonically disperse for 1.5 hours to prepare The graphene oxide nanosheet dispersion liquid is controlled to contain 1.1% of the graphene oxide sheet layer in the graphene oxide nanosheet dispersion liquid.

[0039] Step 2: Preparation of alkalizing agent solution:

[0040] The alkalizing agent solution is a solution formed by dissolving 8 parts of sodium carbonate in 20 parts of deion...