Method for preparing polyester fiber reinforced epoxy composite material based on chemical modification

[0010] Specific embodiment one: Grafting acrylamide on polyester fiber

[0011] Step 1: Boil the polyester fiber in a beaker for 15 minutes, extract it, and dry it for later use. Or degrease with ether in a beaker and dry it in an oven for half an hour before use.

[0012] Step 2: In a closed container or in a fume hood, soak the polyester fiber in the bulking agent-initiator solution at 80°C for 30 minutes, take it out and dry it. Proportion of puffing liquid: Add 5g of dibenzoyl peroxide, 40g of benzene monochloride and 10g of emulsifier (OP 10 ).

[0013] The third step: the grafting reaction is carried out in a 250ml three-necked flask, which is connected with stirring, a reflux condenser and a nitrogen inlet. The three-neck flask was placed in a super constant temperature water bath (T±0.5°C). Add acrylamide aqueous solution with a concentration of 16% into the bottle, pass nitrogen, keep the temperature constant, add the treated polyester fiber, react for a certain peri

[0015] Specific implementation mode two: Grafting acrylamide on polyester nonwoven fabric

[0016] Step 1: Boil the polyester nonwoven fabric in a beaker for 15 minutes, extract it, and dry it for later use. Or degrease with ether in a beaker and dry it in an oven for half an hour before use.

[0017] Step 2: In an airtight container or in a fume hood, soak the polyester nonwoven fabric in the bulking agent-initiator solution at 80°C for 30 minutes, take it out and dry it. Proportion of puffing liquid: Add 5g of dibenzoyl peroxide, 40g of benzene monochloride and 10g of emulsifier (OP 10 ).

[0018] The third step: the grafting reaction is carried out in a 250ml three-necked flask, which is connected with stirring, a reflux condenser and a nitrogen inlet. The three-neck flask was placed in a super constant temperature water bath (T±0.5°C). Add acrylamide aqueous solution with a concentration of 16% into the bottle, pass nitrogen, keep the temperature constant, add the treated

[0020] Specific embodiment three: Grafting acrylic acid on polyester fiber

[0021] Step 1: Weigh a certain amount of PET fiber, soak it in m-cresol for two hours at a temperature of 60°C, wash and air-dry;

[0022] The second step: the treated polyester fiber is mixed with a certain amount of 3.0×10 -3 mol / L KMnO 4 Put the solution together into the Erlenmeyer flask, inject nitrogen gas, and soak for 30 minutes at a constant temperature;

[0023] The third step: then add a certain amount of 0.02mol / L H 2 SO 4 With a small amount of 2.66mol / L acrylic acid (AA), a large amount of manganese dioxide precipitates are produced; after a certain amount of AA is added dropwise, react at a certain temperature for 2 hours to obtain grafted fibers.

[0024] Step 4: The modified PET fiber is dried for 15 minutes, and compounded with epoxy resin E-51 to prepare a composite material.

[0025] Embodiment 4: Grafting acrylic acid on polyester nonwoven fabric

[0026] Step 1: Weigh a