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
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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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