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Method for preparing gypsum composite material by taking rejected carbon fiber as reinforcing fiber
The invention mainly relates to a technology for preparing gypsum composite material from rejected products produced in a carbon fiber production process and subjected to surface treatment. Particularly, the technology is implemented through the following steps: first cutting rejected carbon filaments produced in a carbonization process during carbon fiber production into short filaments with the lengths of 2-3 mm, and adding 5% alkali liquor for washing; adding the washed rejected carbon filaments in a reaction kettle, adding 20% nitric acid according to the ratio of 1:5, performing treatment at 100 DEG C for 4 hours, and absorbing a little NO produced during treatment with a dilute NaOH solution; removing a treating solution by centrifugation, and performing water washing to enable the carbon filaments to be neutral; adding the rejected carbon filaments subjected to oxidation treatment into a 5% ammonia-water solution, stirring for 1 hour, removing the ammonia-water solution by centrifugation, and performing water washing to enable the carbon filaments to be neutral to obtain rejected carbon filaments subjected to surface treatment; mixing 10 parts of rejected carbon filaments subjected to surface treatment and 90 parts of gypsum powder, adding 60 parts of water, performing stirring uniformly to obtain a mixture, pouring the mixture into a 40mm*40mm*160mm mould, performing ultrasonic vibration for 2 minutes, performing demoulding after the mould stands for 12 hours, and performing curing at room temperature for 7 days, so that the gypsum composite material achieves the mechanical property of 4.75 MPa and the compression strength of 7.86 MPa.
Method for preparing gypsum composite material by taking rejected carbon fiber as reinforcing fiber
The invention mainly relates to a technology for preparing gypsum composite material from rejected products produced in a carbon fiber production process and subjected to surface treatment. Particularly, the technology is implemented through the following steps: first cutting rejected carbon filaments produced in a carbonization process during carbon fiber production into short filaments with the lengths of 2-3 mm, and adding 5% alkali liquor for washing; adding the washed rejected carbon filaments in a reaction kettle, adding 20% nitric acid according to the ratio of 1:5, performing treatment at 100 DEG C for 4 hours, and absorbing a little NO produced during treatment with a dilute NaOH solution; removing a treating solution by centrifugation, and performing water washing to enable the carbon filaments to be neutral; adding the rejected carbon filaments subjected to oxidation treatment into a 5% ammonia-water solution, stirring for 1 hour, removing the ammonia-water solution by centrifugation, and performing water washing to enable the carbon filaments to be neutral to obtain rejected carbon filaments subjected to surface treatment; mixing 10 parts of rejected carbon filaments subjected to surface treatment and 90 parts of gypsum powder, adding 60 parts of water, performing stirring uniformly to obtain a mixture, pouring the mixture into a 40mm*40mm*160mm mould, performing ultrasonic vibration for 2 minutes, performing demoulding after the mould stands for 12 hours, and performing curing at room temperature for 7 days, so that the gypsum composite material achieves the mechanical property of 4.75 MPa and the compression strength of 7.86 MPa.
Method for preparing gypsum composite material by taking rejected carbon fiber as reinforcing fiber
MENG FANJUN (author)
2015-09-23
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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