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CN-115726187-B - Fiber composite material and preparation method and application thereof

CN115726187BCN 115726187 BCN115726187 BCN 115726187BCN-115726187-B

Abstract

The invention relates to a fiber composite material, a preparation method and application thereof, wherein the fiber composite material comprises a fiber material and carbon quantum dots, the particle size of the carbon quantum dots is less than 10nm, the content of oxygen elements on the surfaces of the carbon quantum dots is 10-50 wt%, and the content of carbon elements on the surfaces is 50-90 wt%. The fiber composite material has a good effect of removing free radicals.

Inventors

  • SHI CHUNFENG
  • HUANG HUI
  • LIU YANG
  • KANG ZHENHUI
  • WANG XIAO
  • ZHOU BINJIE

Assignees

  • 中国石油化工股份有限公司
  • 中国石油化工股份有限公司石油化工科学研究院

Dates

Publication Date
20260505
Application Date
20210831

Claims (6)

  1. 1. The fiber composite material consists of fiber materials and carbon quantum dots, wherein the content of the carbon quantum dots is 0.009-0.01 wt% based on the total weight of the fiber composite material, the distribution quantity deviation of the carbon quantum dots on the surface of the fiber composite material per unit area is 0-11%, the particle size of the carbon quantum dots is 3-10nm, the content of oxygen elements on the surface of the carbon quantum dots is 20-27 wt%, the content of carbon elements on the surface is 73-80 wt%, and the molar ratio of carbon-oxygen double bonds C=O to carbon-oxygen single bonds C-O on the surface of the carbon quantum dots is 1 (1.3-2); The fiber material is tencel fiber.
  2. 2. A method of making the fibrous composite material of claim 1, the method comprising: And (3) contacting and compositing the fiber material with a solution containing the carbon quantum dots, and carrying out heat treatment on the fiber material which is contacted and composited with the solution containing the carbon quantum dots at 120-280 ℃.
  3. 3. The method according to claim 2, wherein the solution containing the carbon quantum dots is prepared by a method comprising the steps of subjecting an aqueous solution containing an organic acid to a hydrothermal treatment at 150-300 ℃ for 1-48 hours in a heat-resistant closed container; the content of the organic acid in the aqueous solution is 1-60 wt%, and the organic acid is selected from citric acid, tartaric acid, oxalic acid, quinic acid, salicylic acid, malic acid or ascorbic acid, or the combination of two or three of the organic acid and the tartaric acid.
  4. 4. The process according to claim 2, wherein the contacting conditions comprise a temperature of 30-100 ℃, a pressure of 0-2MPa, and a time of 2-60min; The heat treatment conditions include a temperature of 120-280 ℃ and a time of 1-240min.
  5. 5. The method according to claim 2, wherein the amount of the solution containing carbon quantum dots is 10 to 1000 parts by weight, and the concentration of the solution containing carbon quantum dots is 0.0001 to 10g/L, relative to 100 parts by weight of the fiber material; the solvent of the solution containing the carbon quantum dots is one or more of water, methanol, ethanol, acetone and acetic acid.
  6. 6. Use of the fiber composite material according to claim 1 for the production of knitted and/or nonwoven fabrics.

Description

Fiber composite material and preparation method and application thereof Technical Field The invention relates to a fiber composite material, a preparation method and application thereof. Background The fiber is a substance consisting of continuous or discontinuous filaments, and the fiber is widely applied in the fields of home, construction, aviation, automobiles, national defense, military industry and the like. The fiber is mainly chemical fiber and natural fiber, the chemical fiber is fiber made by chemical treatment, and mainly comprises artificial fiber, regenerated fiber, synthetic fiber and inorganic fiber. The artificial fiber comprises viscose fiber, acetate fiber, cuprammonium fiber, regenerated fiber comprises regenerated cellulose fiber, regenerated protein fiber, regenerated starch fiber, and regenerated synthetic fiber, the synthetic fiber comprises polyester fiber, polyamide fiber, polyvinyl alcohol fiber, polyacrylonitrile fiber, polypropylene fiber, etc., and the inorganic fiber comprises glass fiber, metal fiber and carbon fiber. Natural fibers are fibers that exist in nature and can be obtained directly, and are mainly divided into plant fibers and animal fibers. The plant fiber is a natural composite nano new material, and is also called wood fiber and cellulose fiber. Animal fibers are fibers derived from animal hair or insect glandular secretions, including hair fibers and glandular fibers, and the main chemical component of animal fibers is protein, so also called protein fibers. Furthermore, natural fibers include mineral fibers, which are fibers obtained from mineral rock of fibrous structure. Free radical is the culprit of aging of human body, and how to destroy and remove free radical is an important research direction of scientific workers in recent years. The existing fibers for daily life such as home furnishing are mainly animal and plant fibers and synthetic fibers, such as fibers for wearing, such as various cloth materials, mask cloth and the like, but the effect of scavenging free radicals of the fibers is poor. Disclosure of Invention The invention aims to provide a fiber composite material, a preparation method and application thereof, and the fiber composite material has better free radical removal performance. In order to achieve the above object, a first aspect of the present invention provides a fiber composite material comprising a fiber material and carbon quantum dots, wherein the particle size of the carbon quantum dots is 10nm or less, the content of oxygen element on the surface of the carbon quantum dots is 10 to 50 wt%, and the content of carbon element on the surface is 50 to 90 wt%. Optionally, the particle size of the carbon quantum dot is 2-10nm, the content of oxygen element on the surface of the carbon quantum dot is 20-40 wt%, and the content of carbon element on the surface is 60-80 wt%. Optionally, the molar ratio of the carbon-oxygen double bond C=O to the carbon-oxygen single bond C-O on the surface of the carbon quantum dot is 1 (0.5-2). Alternatively, the carbon quantum dots are contained in an amount of 0.0001 to 1 wt%, preferably 0.0005 to 0.01 wt%, based on the total weight of the fiber composite; The variation in the number of the carbon quantum dots distributed on the surface of the fiber composite material per unit area is 0 to 50%, preferably 0 to 30%. Optionally, the fibrous material comprises chemical fibers and natural fibers; Preferably, the fibrous material is selected from one or more of rayon, regenerated fibers, synthetic fibers, inorganic fibers, plant fibers, and animal fibers; more preferably, the fibrous material is a plant fiber and/or an animal fiber. In a second aspect, the invention provides a method for preparing the fiber composite material provided by the first aspect, which comprises the steps of contacting and compositing the fiber material with a solution containing carbon quantum dots, and carrying out heat treatment on the fiber material subjected to the contact and compositing with the solution containing the carbon quantum dots at 120-280 ℃. Optionally, preparing the solution containing the carbon quantum dots by adopting a method that an aqueous solution containing organic acid is subjected to hydrothermal treatment for 1-48 hours at 150-300 ℃ in a heat-resistant closed container; the content of the organic acid in the aqueous solution is 1-60 wt%, and the organic acid is selected from citric acid, tartaric acid, oxalic acid, quinic acid, salicylic acid, malic acid or ascorbic acid, or the combination of two or three of the organic acid and the tartaric acid. Optionally, the contacting conditions comprise a temperature of 30-100 ℃, a pressure of 0-2MPa and a time of 2-60min; The heat treatment conditions include a temperature of 120-280 ℃ and a time of 1-240min. Optionally, the solution containing carbon quantum dots is used in an amount of 10-1000 parts by weight relative to 100 parts by weight of the fiber mat