Method for enhancing polymethylmethacrylate through cellulose

A technology of polymethyl methacrylate and cellulose, which is applied in the field of cellulose reinforced materials, can solve the problems of high manufacturing cost, size limitation of PMMA transparent composite materials, and low production efficiency, and achieve low cost and suitable for large-scale commercialization Production application and high preparation efficiency

Active Publication Date: 2019-02-22
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing cellulose-reinforced polymethyl methacrylate method, the cellulose raw material source is a complete wood formwork, ther...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for cellulose reinforced polymethyl methacrylate, the steps are:

[0033] (1) Set the density to 0.386g / cm 3 Poplar wood is broken into wood particles with a diameter of about 3-5mm;

[0034] (2) Use the mass fraction of 10% NaOH and 5% Na 2 SO 3 Prepare a delignification solution in distilled water, place wood particles equivalent to 30% of the quality of the delignification solution in it and continue boiling for more than 4 hours, and then remove impurities with distilled water to obtain wood particles I;

[0035] (3) Put the wood particles I in H with a mass fraction of 30% 2 o 2 and keep boiling; when all the particles turned white, the wood particles 1 were stirred into fibers and filtered three times with distilled water to obtain delignified wood fibers;

[0036] (4) Pre-polymerization of MMA solution using 2,2'-Azobis (2-methylpropionitrile) (that is, azobisisobutyronitrile) as an initiator, pre-polymerization at 80°C for 15 minutes under the acti...

Embodiment 2

[0042] The difference between this embodiment and embodiment 1 is that in step (7), the treated wood fibers are placed in a glass mold with a size of 80mm×25mm×5mm.

[0043] After testing, the PMMA transparent composite material prepared in this example has a light transmittance of 83%; a haze of 72%; an elastic modulus of 2.2 GPa; and a tensile strength of 46.8 MPa.

Embodiment 3

[0045] The difference between this embodiment and embodiment 1 is that in step (7), the treated wood fiber is placed in a glass mold with a size of 300mm×300mm×10mm.

[0046] After testing, the PMMA transparent composite material prepared in this example has a light transmittance of 68%; a haze of 76%; an elastic modulus of 2.2 GPa; and a tensile strength of 46.8 MPa.

[0047] In summary, the method of using cellulose-reinforced polymethyl methacrylate according to the present invention not only has good light transmittance and a certain degree of haze, but can be used in specific places where privacy needs to be protected, and at the same time makes MMA as a raw material. The improved mechanical strength of plexiglass is of great significance to the preparation of large-size PMMA transparent composites, and the produced PMMA transparent composites are not limited by size.

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Abstract

The invention discloses a method for enhancing polymethylmethacrylate (PMMA) through cellulose and belongs to the technical field of cellulose enhanced materials. The method comprises the following steps: S01, smashing wood blocks into wood grains; S02, preparing a lignin removing solution; putting the wood grains into the lignin removing solution and continuously boiling for 4h or more; then washing with distilled water to remove impurities, so as to obtain wood grains I; S03, putting the wood grains I into H2O2 with the mass percent of 30 percent and heating and boiling, wherein the mass ofthe wood grains I is not higher than 30 percent of the mass of the H2O2. The invention aims at improving the mechanical strength of the polymethylmethacrylate; modified wood fibers and a pre-polymerized MMA (Methylmethacrylate) solution are prepared into a PMMA transparent composite material with any size and high light transmittance rate; and raw materials of the wood fibers have a wide source and wood dust processing waste materials (such as sawdust and branches) can be adopted, so that the cost is low, resources are saved and the preparation efficiency is high.

Description

technical field [0001] The invention relates to a method for reinforcing polymethyl methacrylate with cellulose, and belongs to the technical field of cellulose reinforcing materials. Background technique [0002] In order to maintain the world's energy resources and reduce the burden on the environment, the manufacture of green buildings has become an issue that urgently needs to be addressed quickly. Harmless and sustainable materials have become a priority in the list of world interests. Plexiglass made of methyl methacrylate (MMA) is gradually replacing traditional inorganic The application of glass in life, such as baby bottles, children's water bottles and so on. However, the products produced by only a single MMA have single functions and limited application places, and the application of them can be further improved by adding functional materials. [0003] As one of the most abundant biomass materials, wood has been widely used as tools, fuel and construction mater...

Claims

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Application Information

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IPC IPC(8): C08L33/12C08L1/02C08F120/14
CPCC08F120/14C08L33/12C08L2201/10C08L2205/16C08L1/02
Inventor 张耀丽王旋单舒雅闻靓高婧淑蒯炳斌
Owner NANJING FORESTRY UNIV
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