Method for improving composite performance of laccase induced plant fiber grafted acrylic ester with resin
An acrylate and resin composite technology, applied in the field of composite materials, can solve problems such as affecting the adhesion of fiber reinforcement and resin matrix, reducing the grafting rate and grafting efficiency of monomers, and reducing the mechanical properties of composite materials, so as to improve the interface phase. Capacitance, reducing hydrophilicity, and improving mechanical properties
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Embodiment 1
[0022] Prepare a 30g / L caustic soda solution according to the bath ratio of 1:50, put it into the jute gray cloth, treat it in a 90°C constant temperature water bath for 2 hours, take it out, rinse it with clean water for 2-3 times, and then treat it with a 5g / L dilute acetic acid solution for 30 minutes, and finally Rinse thoroughly with clean water and dry at 50°C for later use.
[0023] Get the pretreated jute fabric and add it to the dispersion system of buffer (pH 5.0) / acetone (volume ratio 3:1), bath ratio 1:50, add laccase (35% o.wf) and methacrylic acid respectively Methyl ester (50% o.w.f), fully reacted in a 50°C constant temperature oscillating water bath for 24 hours, took it out, washed it with hot water, extracted it with acetone solution for 12 hours, washed it thoroughly with clean water, and dried it at 50°C for later use.
[0024] The grafting rate of the jute fabric after the above treatment was 8.5%, and the water drop wetting time was 252s (the water drop ...
Embodiment 2
[0029] Prepare 20g / L caustic soda solution according to the bath ratio of 1:30, put it into ramie fabric, treat it in a constant temperature water bath at 80°C for 1 hour, take it out, rinse it with clean water 2-3 times, then treat it with 2g / L acetic acid solution for 20 minutes, and finally wash it with clean water Wash thoroughly with water and dry at 70°C for later use.
[0030] Get the pretreated ramie fabric and add it to the dispersion system of buffer (pH 4.5) / acetone (volume ratio 2:1), bath ratio 1:50, add laccase (55% o.w.f) and butyl acrylate (100 %o.w.f), put it into a constant temperature shaking water bath at 45°C for a full reaction for 48 hours, take it out, wash it with hot water, extract it with acetone solution for 10 hours, wash it thoroughly with water, and dry it at 50°C.
[0031] The grafting rate of the ramie fabric after the above treatment is 12.5%, and the water droplet wetting time is 342s (the water droplet wetting time of the ungrafted ramie fab...
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