Cellulose nanowhisker, synthetic fiber, cement-based composite material and reinforcing method

A nano-whisker, synthetic fiber technology, applied in the field of fiber surface modification and modification, to achieve the effects of superior bonding performance, fiber surface improvement, and changing physical and chemical properties

Pending Publication Date: 2022-07-01
QINGDAO AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In particular, it relates to a method for nano-modification and strengthening of the bonding interface of synthetic fiber cement-based composite materials

Method used

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  • Cellulose nanowhisker, synthetic fiber, cement-based composite material and reinforcing method
  • Cellulose nanowhisker, synthetic fiber, cement-based composite material and reinforcing method
  • Cellulose nanowhisker, synthetic fiber, cement-based composite material and reinforcing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] This embodiment of the present invention provides a method for optimizing the design of functional groups on the surface of cellulose nanowhiskers. Based on the molecular dynamics simulation analysis of the adsorption performance of functional groups at the atomic level interface microstructure and chemical coordination, and the principle of quantum chemical calculation, the surface The functional groups were optimized to form functionalized cellulose nanowhiskers with the best adsorption performance with cement-based materials.

[0063] The atomic-level interface microstructure and chemical coordination are analyzed based on quantum chemical calculation and molecular dynamics simulation, and functional groups are optimized and designed with the help of deep learning according to adsorption characteristics:

[0064] (1) Multi-scale computational analysis of nanocellulose:

[0065] (1.1) Quantum chemical calculation: Calculate the highest occupied molecular orbital energ...

Embodiment 2

[0079] Based on the above Embodiment 1, this embodiment of the present invention provides a surface-modified synthetic fiber of cellulose nano-whiskers, and the surface-modified synthetic fiber of cellulose nano-whiskers is composed of the cellulose nano-whisker polymer nanomaterials. As a coating, it coats the surface of the PE fiber to form a rough surface structure, which makes the surface of the PE fiber rough.

Embodiment 3

[0081] Based on the above-mentioned Embodiment 2, this embodiment of the present invention provides a method for preparing a synthetic fiber surface-modified with cellulose nanowhiskers, including:

[0082] The cellulose nano-whiskers are configured into a mixed solution, and by soaking and heating to solidify, the cellulose nano-whiskers are coated on the surface of the PE fiber and form a film with sufficient electrostatic adsorption, and used as a coupling agent to strengthen the cellulose nano-crystals Bonding between synthetic fibers to be surface-modified and cement-based materials.

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Abstract

The invention belongs to the technical field of fiber surface modification, and discloses cellulose nanowhiskers, synthetic fibers, a cement-based composite material and a reinforcing method. According to the functionalized cellulose nanowhisker, surface functional groups are optimally designed through quantum chemical calculation, molecular dynamics simulation and machine learning, and the cellulose nanowhisker with better surface activity is formed. The functionalized cellulose nanowhisker provided by the invention has relatively large specific surface area and reaction activity and optimal adsorption performance with a cement-based material. And the cement can be promoted to hydrate, and the compactness, the mechanical property and the durability of the cement-based material are improved. The functionalized cellulose nanowhisker can be used as a coupling agent to improve the bonding between the fiber and a cement matrix. The existence of the functionalized cellulose nanowhiskers provides chemical activity for the fiber surface, changes the chemical characteristics of the fiber surface, and is more beneficial to improving the interface bonding force.

Description

technical field [0001] The invention belongs to the technical field of fiber surface modification and modification, and particularly relates to cellulose nano-whiskers, synthetic fibers, cement-based composite materials and reinforcing methods. Background technique [0002] In order to solve the problems of weak interaction between fibers and cement matrix bonding interface and a large number of pores in the interface, scholars have proposed the following fiber surface modification and modification methods for fiber cement matrix composites: [0003] Physical modification, that is, etching and damaging the fiber body, making the surface of the fiber grooved and increasing the surface roughness of the fiber, such as plasma, γ-ray irradiation, ultrasonic waves, etc. At the same time, the external physical conditions can also cause changes in the chemical properties of the fiber surface. However, the degree of change in chemical properties is limited by the strength of physica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16C10/00G16C20/10G16C20/70G06K9/62C08B15/02D06M15/05D06M101/20
CPCG16C10/00G16C20/10G16C20/70D06M15/05C08B15/02D06M2101/20G06F18/2135G06F18/2411
Inventor 孟丹樊其昌孟雪
Owner QINGDAO AGRI UNIV
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