Method for recovering carbon fiber reinforced bismaleimide resin-based composite material
A technology for recycling carbon fiber and composite materials, which is applied in the direction of plastic recycling and recycling technology, can solve the problems of harsh reaction conditions, insufficient practicability, and long reaction time, and achieve high recycling efficiency, easy operation, and small loss of mechanical properties. Effect
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Embodiment 1
[0031] Step 1. Take a cut carbon fiber reinforced double horse resin matrix composite material sample, after cleaning and drying, its mass is 4.182g, and its volume is 30×20×5mm 3 .
[0032] Step 2. Put the composite material sample of step 1 into 30 mL of ethanolamine solvent, and react at a constant temperature of 140° C. for 5 h.
[0033] Step 3. The reacted carbon fiber and the liquid product are separated through a filter screen, and the carbon fiber is washed several times with absolute ethanol and deionized water, and then placed in an oven at 100-110° C. for drying for 12 hours.
[0034] Step 4. The weight of the recovered carbon fiber is weighed to be 3.025 g, and the degradation rate is 82.6 wt%. The tensile strength of the recovered carbon fiber was 3.64 GPa, the tensile strength of the original fiber was 4.12 GPa, and the tensile strength retention rate was 88.35%.
Embodiment 2
[0036] Step 1. Take a cut carbon fiber reinforced bi-horse resin-based composite material sample, after cleaning and drying, its mass is 4.545g, and its volume is 30×20×5mm 3 .
[0037] Step 2: Put the composite material sample of Step 1 into 30 mL of ethanolamine solvent, and react at a constant temperature of 150° C. for 5 hours.
[0038] Step 3: The reacted carbon fiber and the liquid product are separated through a filter screen, and the carbon fiber is washed several times with absolute ethanol and deionized water, and then placed in an oven at 100-110° C. for drying for 12 hours.
[0039] Step 4: The weight of the recovered carbon fiber is weighed to be 3.206g, and the degradation rate is 87.9wt%. The tensile strength of the recovered carbon fiber was 3.76GPa, the tensile strength of the original fiber was 4.12GPa, and the tensile strength retention rate was 91.26%.
Embodiment 3
[0041] Step 1. Take a piece of carbon fiber reinforced bismuth resin matrix composite material sample after cutting, after cleaning and drying, its mass is 4.392g, and its volume is 30×20×5mm 3 .
[0042] In step 2, the composite material sample in step 1 was put into 30 mL of ethanolamine solvent, and reacted at a constant temperature of 160° C. for 5 h.
[0043] Step 3: The reacted carbon fiber and the liquid product are separated through a filter screen, and the carbon fiber is washed several times with absolute ethanol and deionized water, and then placed in an oven at 100-110° C. for drying for 12 hours.
[0044] Step 4: The weight of the recovered carbon fiber is weighed to be 2.936g, and the degradation rate is 98.9wt%. The tensile strength of the recovered carbon fiber was 3.76GPa, the tensile strength of the original fiber was 4.12GPa, and the tensile strength retention rate was 94.17%.
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Abstract
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