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...

AI Technical Summary

Problems solved by technology

The main problem of iron tanning agent is that the tanned leather is not resistant to storage. Iron tanned leather will release acidic substances during storage to make leather collagen fibers hydrolyze, be destroyed and become brittle; ferric salt in iron tanned leather In the collagen fiber system, the collagen fiber system is reduced to ferrous iron by collagen, and then the ferrous iron is oxidized to ferric iron by the oxygen in the air. This repeated change makes the collagen fiber brittle and hard, and the water resistance of iron-tanned leather is also relatively poor. Poor, iron tanned leather is relatively hard, flat and thin, etc.

The improvement for iron tanning agent is less at present, and main reason is that these problems that iron tanning agent exist are more difficult to solve (Karthikeyan R., Ramesh R., Venba R., Ramamoorthy U., Babu N.K.C., Ramasami T.The renaissance of Fe(III) as Self-tanning Agent. JSLTC,2011,95(4):171-176)