Carbon fiber reinforced gypsum board and preparation method thereof
A technology of gypsum board and carbon fiber, which is applied in the field of building materials, can solve the problem of no obvious change in the strength of gypsum, and achieve the effects of scientific compatibility, improved flexural strength, and remarkable water resistance
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Embodiment 1
[0025] A carbon fiber reinforced gypsum board is prepared, comprising the following steps:
[0026] (1) Weigh 70 parts of phosphogypsum powder, 20 parts of diatomaceous earth, 5 parts of glucose, 4 parts of sodium carboxymethyl cellulose, and 160 parts of water according to the required parts by weight, with a diameter of 3 to 8 μm and a length of 20 parts of 5mm chopped carbon fiber.
[0027] (2) Completely immerse the chopped carbon fiber weighed in step (1) in concentrated nitric acid and heat to 80°C for the first heat treatment for 45 minutes; then heat to 110°C for the second heat treatment for 60 minutes; reheat After the third heat treatment at 90°C for 50 minutes, the chopped carbon fibers were taken out and washed fully with water, the surface of the chopped carbon fibers was completely rinsed with nitric acid, and then put into an oven for 8 hours at 120°C to obtain modified short carbon fibers. Cut carbon fiber.
[0028] (3) After adding the glucose weighed in st...
Embodiment 2
[0032] A carbon fiber reinforced gypsum board is prepared, comprising the following steps:
[0033] (1) Weigh according to the required parts by weight: 110 parts of desulfurized gypsum powder, 30 parts of diatomaceous earth, 10 parts of glucose, 12 parts of admixture methyl cellulose, 200 parts of water, with a diameter of 3-8 μm and a length of 25 m 30 parts of chopped carbon fiber.
[0034] (2) Completely immerse the chopped carbon fiber weighed in step (1) in concentrated nitric acid and heat to 100°C for the first heat treatment for 60 minutes; then heat to 140°C for the second heat treatment for 120 minutes; reheat After the third heat treatment at 120°C for 80 minutes, the chopped carbon fibers were taken out and washed fully with water, the surface of the chopped carbon fibers was completely rinsed with nitric acid, and then put into an oven for 8 hours at 120°C to obtain modified short carbon fibers. Cut carbon fiber.
[0035] (3) After adding the glucose weighed in...
Embodiment 3
[0039] A carbon fiber reinforced gypsum board is prepared, comprising the following steps:
[0040] (1) Weigh according to the required parts by weight: 100 parts of desulfurized gypsum powder, 27 parts of diatomaceous earth, 8 parts of glucose, 10 parts of sodium carboxymethyl cellulose, 190 parts of water, with a diameter of 3 to 8 μm and a length of 27 parts for 20mm chopped carbon fiber.
[0041] (2) Completely immerse the chopped carbon fiber weighed in step (1) in concentrated nitric acid and heat to 90°C for the first heat treatment for 55 minutes; then heat to 130°C for the second heat treatment for 110 minutes; reheat After the third heat treatment at 110°C for 60 minutes, the chopped carbon fibers were taken out and washed fully with water, and the surface of the chopped carbon fibers was completely rinsed with nitric acid, and then put into an oven for 8 hours at 120°C to obtain modified short carbon fibers. Cut carbon fiber.
[0042] (3) After adding the glucose we...
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