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Ultrahigh-content cellulose reinforced polymer composite material with shell-like structure and preparation method thereof

A composite material and polymer technology, used in chemical instruments and methods, wood impregnation, manufacturing tools, etc., can solve problems such as uniform dispersion of ultra-high content cellulose, and achieve the effects of improving mechanical strength, reducing usage, and high toughness

Active Publication Date: 2021-10-22
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the ultra-high content of cellulose cannot be uniformly dispersed in the polymer, the present invention provides an ultra-high content of cellulose-reinforced polymer imitating a shell structure Composite material and its preparation method

Method used

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  • Ultrahigh-content cellulose reinforced polymer composite material with shell-like structure and preparation method thereof

Examples

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Effect test

Embodiment 1

[0022] This example provides a method for preparing a super-high-content cellulose-reinforced polymer composite material imitating a shell structure, and the specific steps are as follows:

[0023] Step 1, delignification treatment:

[0024] Place a balsa wood veneer with a thickness of 1mm in a sodium chlorite solution with a concentration of 1wt.%. The sodium chlorite solution is adjusted to a pH value of 4.6 by glacial acetic acid, soaked at 80°C for 12h, and after taking it out Washing with distilled water to complete the delignification treatment;

[0025] Step 2, TEMPO oxidation treatment:

[0026] Prepare 0.1mol / L phosphate buffer, TEMPO, NaClO according to the volume to mass ratio of 100ml:0.016g:1.13g:10mL 2 and 0.1mol / L NaClO phosphate buffer; TEMPO (2,2,6,6-tetramethylpiperidine oxide) and NaClO 2 Add 0.1mol / L phosphate buffer solution, then add 0.1mol / L phosphate buffer solution, mix well to obtain 0.1mol / L phosphate buffer solution; add the sample obtained in s...

Embodiment 2

[0037] This example provides a method for preparing a super-high-content cellulose-reinforced polymer composite material imitating a shell structure, and the specific steps are as follows:

[0038] Step 1, delignification treatment:

[0039] Place a poplar veneer with a thickness of 0.2mm in a sodium chlorite solution with a concentration of 1wt.%. The sodium chlorite solution is adjusted to a pH value of 4.6 by glacial acetic acid. Washing with distilled water to complete the delignification treatment;

[0040] Step 2, TEMPO oxidation treatment:

[0041] Prepare 0.1mol / L phosphate buffer, TEMPO, NaClO according to the volume to mass ratio of 100ml:0.016g:1.13g:10mL 2 and 0.1mol / L NaClO phosphate buffer; TEMPO (2,2,6,6-tetramethylpiperidine oxide) and NaClO 2 Add 0.1mol / L phosphate buffer solution, then add 0.1mol / L phosphate buffer solution, mix well to obtain 0.1mol / L phosphate buffer solution; add the sample obtained in step 1 into the TEMPO oxidation treatment solution ...

Embodiment 3

[0051] This example provides a method for preparing a super-high-content cellulose-reinforced polymer composite material imitating a shell structure, and the specific steps are as follows:

[0052] Step 1, delignification treatment:

[0053] Place a eucalyptus veneer with a thickness of 0.5mm in a sodium chlorite solution with a concentration of 2wt.%. The sodium chlorite solution is adjusted to a pH value of 4.6 by glacial acetic acid. Washing with distilled water to complete the delignification treatment;

[0054] Step 2, TEMPO oxidation treatment:

[0055] Prepare 0.1mol / L phosphate buffer, TEMPO, NaClO according to the volume to mass ratio of 100ml:0.016g:1.13g:10mL 2 and 0.1mol / L NaClO phosphate buffer; TEMPO (2,2,6,6-tetramethylpiperidine oxide) and NaClO 2 Add 0.1mol / L phosphate buffer solution, then add 0.1mol / L phosphate buffer solution, mix well to obtain 0.1mol / L phosphate buffer solution; add the sample obtained in step 1 into the TEMPO oxidation treatment solut...

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Abstract

The invention relates to an ultrahigh-content cellulose reinforced polymer composite material with a shell-like structure and a preparation method thereof, and belongs to the technical field of composite materials. In order to solve the problem that ultrahigh-content cellulose cannot be uniformly dispersed in a polymer, the invention provides a preparation method of the ultrahigh-content cellulose reinforced polymer composite material with the shell-like structure. A wood sheet is soaked in an inorganic ion solution after being subjected to delignification treatment and TEMPO oxidation treatment, and a cellulose membrane is obtained after the wood sheet is taken out and subjected to cold pressing; and the surface of the cellulose membrane is coated with a layer of polymer, the cellulose membranes coated with the polymer are stacked according to the fact that the fiber directions of every two adjacent cellulose membranes are perpendicular to each other, and the composite material is obtained through hot pressing. According to the invention, the cellulose and the polymer simulate the 'brick-mud' structure of the shell, the cellulose content of the obtained composite material is as high as 92.3-96.1 wt.%, and the composite material has the tensile strength of 137-280 MPa and the high toughness of 1.79-8.22 MJ m <-3 >.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a super-high-content cellulose-reinforced polymer composite material imitating a shell structure and a preparation method thereof. Background technique [0002] Shells in nature are composed of 95% aragonite flakes and 5% polymers. Its unique "brick-mud" alternating laminated structure endows the limited components with excellent characteristics of light weight, high strength and high toughness. Lignocellulose is a natural high-molecular polymer with a multi-level hierarchical structure, including cellulose-based fibrils and smaller cellulose molecular chains. Cellulose exhibits a high tensile strength of 2-6GPa and a high elastic modulus of 150GPa, so it is widely used as a reinforcing phase to improve the mechanical strength of composite materials. [0003] However, the surface of cellulose contains a large number of hydroxyl groups, which is easy to ag...

Claims

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Application Information

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IPC IPC(8): B32B21/14B32B21/13B32B33/00B32B37/06B32B37/10B32B37/00B27K3/02B27K3/20
CPCB32B21/14B32B21/13B32B33/00B32B37/06B32B37/10B32B37/00B27K3/025B27K3/20B32B2255/08B32B2255/26B32B2037/243B27K2240/15Y02W30/62
Inventor 许民孙浩纪彤毕红杰周欣圆
Owner NORTHEAST FORESTRY UNIVERSITY
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