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LBL-method intumescent flame-retardant cotton fabric coating and coating method thereof

A coating method and cotton fabric technology, which is applied in the direction of flame-retardant fibers, plant fibers, textiles and papermaking, can solve problems such as uneven coating thickness, non-conformity, water resources and air pollution, and achieve product surface coating Uniformity of layer, improvement of flame retardant performance, effect of improved flame retardant performance

Active Publication Date: 2020-11-27
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many deficiencies in the existing coating technology, such as large energy consumption and complex and expensive equipment in the preparation and coating process of the coating itself; strict requirements for the coating process; uneven coating thickness, and the overall thickness is uncontrollable Wait
In addition, the preparation and coating process of the coating have serious pollution to water resources and air, which does not meet the requirements of the current era of green environmental protection.

Method used

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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  • LBL-method intumescent flame-retardant cotton fabric coating and coating method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1: An LBL method intumescent flame-retardant cotton fabric coating has 15 bimolecular film layers adsorbed on the surface of the cotton fabric. Each layer of bimolecular film is formed by PEI (polyethyleneimine), tannic acid and phytic acid with electrostatic attraction and hydrogen bond as the driving force.

[0050] The coating method is as follows:

[0051] (1), the cotton fabric is washed with deionized water, and the surface ions of the cotton fabric are cleaned;

[0052] (2), put the cotton fabric treated in step (1) into a 5wt% polyethyleneimine solution and soak for at least 5min, take out the cotton fabric and clean the unadsorbed ions on the surface of the cotton fabric with deionized water;

[0053] (3), cotton fabric is put into the tannic acid solution of 0.2wt% concentration and continues soaking at least 5min, takes out cotton fabric and cleans the unadsorbed ion of cotton fabric surface with deionized water;

[0054] (4), put the cotton fabric ...

Embodiment 2

[0057] Example 2: An LBL method intumescent flame-retardant cotton fabric coating has 15 bimolecular film layers adsorbed on the surface of the cotton fabric. Each layer of bimolecular film is formed by PEI (polyethyleneimine) and phytic acid with electrostatic attraction and hydrogen bond as the driving force.

[0058] The coating method is as follows:

[0059] (1), the cotton fabric is washed with deionized water, and the surface ions of the cotton fabric are cleaned;

[0060] (2), put the cotton fabric treated in step (1) into a 5wt% polyethyleneimine solution and soak for at least 5min, take out the cotton fabric and clean the unadsorbed ions on the surface of the cotton fabric with deionized water;

[0061] (3), the cotton fabric is put into the phytic acid solution of 4wt% concentration and continues soaking for at least 5min, takes out the cotton fabric and cleans the unadsorbed ions on the surface of the cotton fabric with deionized water;

[0062] (4), put the cotto...

Embodiment 3

[0065] Example 3: An LBL method intumescent flame-retardant cotton fabric coating has 10 bimolecular film layers adsorbed on the surface of the cotton fabric. Each layer of bimolecular film is formed by PEI (polyethyleneimine), tannic acid and phytic acid with electrostatic attraction and hydrogen bond as the driving force.

[0066] The coating method is as follows:

[0067] (1), the cotton fabric is washed with deionized water, and the surface ions of the cotton fabric are cleaned;

[0068] (2), put the cotton fabric treated in step (1) into a 5wt% polyethyleneimine solution and soak for at least 5min, take out the cotton fabric and clean the unadsorbed ions on the surface of the cotton fabric with deionized water;

[0069] (3), cotton fabric is put into the tannic acid solution of 0.2wt% concentration and continues soaking at least 5min, takes out cotton fabric and cleans the unadsorbed ion of cotton fabric surface with deionized water;

[0070] (4), put the cotton fabric ...

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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Abstract

The invention discloses an LBL-method intumescent flame-retardant cotton fabric coating. The coating is an intumescent flame-retardant system constructed by multiple layers of films formed by a flame-retardant finishing agent adsorbed on the surface of a cotton fabric layer upon layer; each film is a bimolecular film layer of tannic acid and / or phytic acid and a water-soluble polymer with amino groups to form electrostatic attraction and hydrogen bonds and adsorb on the surface of the cotton fabric or the previous film, wherein the phytic acid is used as an acid source, the tannic acid is usedas a carbon source, and the amino polymer is used as a gas source. According to the LBL-method intumescent flame-retardant cotton fabric coating, a flame-retardant coating is constructed on the surface of the cotton fabric by a process of self-assembly layer upon layer, and thus the flame retardant performance of the cotton fabric is improved; the flexible coating method is simple in operation and controllable in thickness, and the surface coating of a final product is uniform; and in addition, because an LBL method is adopted in a coating process, a solvent used in the process is water, andno organic solvent pollution to the environment is achieved.

Description

technical field [0001] The invention belongs to the technical field of fire prevention and flame retardant materials, and in particular relates to an LBL method intumescent flame retardant cotton fabric coating. Background technique [0002] Cotton fiber is the fiber wrapped on the seeds of cotton plants belonging to the Malvaceae family, also known as cotton. The varieties of cotton fiber are mainly distinguished by the length and linear density of cotton fiber, which are mainly divided into three categories: upland cotton, sea-island cotton and coarse staple cotton. Most of the cotton planted in China is upland cotton, and the length and strength of upland cotton are smaller than that of sea-island cotton, so sea-island cotton is used to weave high-quality cotton yarn. The types of sea-island cotton include Xinjiang long-staple cotton, Egyptian cotton and Sudan cotton. The short and thick coarse cotton fiber has been gradually eliminated. According to the initial proces...

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/224D06M13/292D06M15/61D06M101/06
CPCD06M13/224D06M13/292D06M15/61D06M2101/06D06M2200/30
Inventor 祁珍明王矿沙德生李开红魏林王春霞高大伟刘丽
Owner YANCHENG INST OF TECH