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Flame-retardant nanometer film and preparation method and application thereof

A nanomembrane and nanocellulose technology, applied in the field of nanomaterials, to achieve the effects of increasing the formation speed, improving flame retardancy, and expanding the scope of application

Active Publication Date: 2018-01-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, most of the reports on nano-hydroxyapatite are about its application in the field of biomedicine, and there is no report on the preparation of flame-retardant materials by nano-cellulose and nano-hydroxyapatite

Method used

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  • Flame-retardant nanometer film and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A flame retardant nano film, its preparation method is as follows:

[0030] (1) After treating rice-wheat straw pulp with 15wt% NaOH solution, the additions of NaBr, TEMPO and NaClO in the rice-wheat straw fiber after per gram of absolute dry alkali treatment are 0.15g, 0.015g and 0.6g respectively, and the pulp concentration is 2wt %, the reaction time is 1.5h, the pH=10.0~10.3, and the rotation speed is 500r / min. After the TEMPO oxidation treatment, use a high-pressure homogenizer to process twice at a pressure of 10,000 psi, and then process five times at a pressure of 25,000 psi to obtain nanocellulose.

[0031] (2) The nanocellulose is formulated into a solution, and the flame-retardant nano-film is obtained after forming a film for 48 hours under constant temperature and humidity conditions with a temperature of 30° C. and a humidity of 90%.

[0032] The limiting oxygen index of the prepared nano-film is 24.4% as measured by an oxygen index measuring instrument, ...

Embodiment 2

[0034] A flame retardant nano film, its preparation method is as follows:

[0035] (1) After treating rice-wheat straw pulp with 15wt% NaOH solution, the additions of NaBr, TEMPO and NaClO in the rice-wheat straw fiber after per gram of absolute dry alkali treatment are 0.15g, 0.015g and 0.6g respectively, and the pulp concentration is 2wt %, the reaction time is 1.5h, the pH=10.0~10.3, and the rotation speed is 500r / min. After the TEMPO oxidation treatment, use a high-pressure homogenizer to process twice at a pressure of 10,000 psi, and then process five times at a pressure of 25,000 psi to obtain nanocellulose.

[0036] (2) Dry the hydroxyapatite at 110° C. for 12 hours, take it out, and then perform ball milling for 72 hours, then use an ultrasonic cell crusher with a power of 800 w, and adjust the output power to 30%, and process it for 20 minutes to obtain a nano-hydroxyapatite emulsion.

[0037] (3) According to the mass addition ratio of nano-hydroxyapatite relative t...

Embodiment 3

[0040] (1) After treating rice-wheat straw pulp with 15wt% NaOH solution, the additions of NaBr, TEMPO and NaClO in the rice-wheat straw fiber after per gram of absolute dry alkali treatment are 0.15g, 0.015g and 0.6g respectively, and the pulp concentration is 2wt %, the reaction time is 1.5h, the pH=10.0~10.3, and the rotation speed is 500r / min. After the TEMPO oxidation treatment, use a high-pressure homogenizer to process twice at a pressure of 10,000 psi, and then process five times at a pressure of 25,000 psi to obtain nanocellulose.

[0041] (2) Dry the hydroxyapatite at 100°C for 24 hours, take it out, and then perform ball milling for 48 hours, then use an ultrasonic cell crusher with a power of 800w, and adjust the output power to 40%, and process for 10 minutes to obtain a nano-hydroxyapatite emulsion.

[0042] (3) According to the mass addition ratio of nano-hydroxyapatite relative to the dry nano-cellulose 8%, the nano-hydroxyapatite emulsion is added to the nano-...

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Abstract

The invention belongs to the field of nanometer materials, and discloses a flame-retardant nanometer film and a preparation method and application thereof. The preparation method of the flame-retardant nanometer film comprises the steps that hydroxyapatite is dried and then subjected to ball milling, and after ultrasionic cell-break treatment is conducted for a period of time, nanometer hydroxyapatite emulsion is obtained; nanocellulose and nanometer hydroxyapatite are prepared into a blend solution according to certain proportion, film formation is conducted under the condition of constant temperature and humidity, and the flame-retardant nanometer film is obtained. The flame-retardant nanometer film has good flame retardance, the nanocellulose and the nanometer hydroxyapatite have the very good biocompatibility, and the flame-retardant nanometer film can be applied to the fields of flame-retardant materials, flexible electronic devices, biological and medical materials and the like.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and in particular relates to a flame-retardant nanometer film and its preparation method and application. Background technique [0002] my country is both a major producer and consumer of chemical fibers, but the current proportion of flame-retardant fibers to the total amount of chemical fibers is still very low. Although the research on flame-retardant fiber materials in my country began in the mid-1960s, flame-retardant technology The development is relatively slow, so the flame retardant modification technology of fibers is one of the current research directions. [0003] Cellulose is the most widely distributed and most abundant polysaccharide in nature. It is an existing polymer compound composed of D-glucose with β-1,4 glycosidic bonds. However, natural cellulose has many defects in physical form and chemical properties, such as low strength, poor pyrolysis performance, and poor corrosio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L1/02C08K3/32
Inventor 王斌陈克复李金鹏曾劲松徐峻高文花
Owner SOUTH CHINA UNIV OF TECH
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