Leather tanning agent based on cellulose and nanometer SiO2 hybridization and preparation method

A cellulose, dialdehyde cellulose technology, applied in small raw hide/large raw hide/leather/fur treatment, small raw hide/large raw hide/leather hide/fur chemical treatment, tanning treatment, etc., can solve the shrinkage of vegetable tanned leather Low temperature, unsuitable production of soft leather, environmental pollution and other problems, to improve the washing resistance, avoid surface over-tanning phenomenon, avoid the effect of rough surface phenomenon
CN106282437AInactive Publication Date: 2017-01-04FUJIAN AGRI & FORESTRY UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FUJIAN AGRI & FORESTRY UNIV
Publication Date
2017-01-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a leather tanning agent based on cellulose and nanometer SiO2 hybridization and a preparation method of a compound. The compound is obtained by dialdehyde cellulose and SiO2-NH2 through a Schiff's Base reaction; and the weight ratio of the dialdehyde cellulose to nanometer SiO2 particles is 2.0-4.0. The leather tanning agent is a clean, environment-friendly and ecological leather tanning agent product, and eliminates pollution of a chromium tanning agent. Meanwhile, a synergistic effect of modified cellulose and nanometer SiO2 can enhance the rigidity of a modified cellulose tanning unit and improve the water washing resistance of the nanometer SiO2 to finally raise the shrinkage temperature; and the surface over-tanning phenomenon caused by single use of the modified cellulose can be prevented, and the rough surface phenomenon caused by agglomeration by single use of nanometer SiO2 can be prevented, so that the crust leather grain surface is delicate.
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Description

technical field

[0001] The invention relates to the technical field of leather chemicals and their preparation, in particular to a leather tanning agent and a preparation method. Background technique

[0002] Tanning with chrome tanning agents has long been the mainstream technique for leather tanning in the modern tanning industry. In the traditional tanning process, a large amount of chemical materials such as acids, alkalis, salts, tanning agents, and dyes are used. The use of these materials leads to a relatively high level of chromium and ammonia nitrogen in the tanning waste liquid; and, in Toxic gases such as ammonia and hydrogen sulfide are also emitted during the tanning process. The discharge of waste liquid, waste residue and waste gas all threaten the health of tannery workers and the surrounding environment to varying degrees. At the same time, the utilization rate of chromium salt in the traditional chrome tanning method is only 65%-75%. This low absorption r...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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