Method for regulating thermoplasticity and toughness of redox-modified plant fiber and application of redox-modified plant fiber
A plant fiber, oxidation modification technology, applied in plant fiber, fiber treatment, fiber raw materials, etc., can solve the problems of high processing temperature, poor toughness, narrow processing temperature window, etc., to improve thermoplasticity and toughness, and good processing fluidity , low-cost effect
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Embodiment 1
[0040] A method for regulating the thermoplasticity and toughness of redox modified plant fibers and a method for preparing materials, the specific steps are as follows:
[0041] (1) The sisal fiber is cut to 5 to 10 mm by a fiber cutter.
[0042] (2) Add sodium periodate and the cut sisal fiber described in step (1) in the aqueous solution at a weight ratio of 2:1, and configure a suspension with a sodium periodate concentration of 20g / L. Then, it was stirred and reacted at 60° C. in the dark for 4 hours, filtered and washed to obtain oxidatively modified sisal fibers.
[0043] (3) Sodium borohydride and the oxidation-modified sisal fiber described in step (2) are added into the aqueous solution at a weight ratio of 0.5:1, and configured into a suspension with a sodium borohydride concentration of 5 g / L. Stir the reaction at room temperature for 4 hours, filter and wash to obtain redox-modified sisal fiber.
[0044] (4) Glycerin is mixed with the oxidation-reduction modifie...
Embodiment 2
[0048] A method for regulating the thermoplasticity and toughness of redox modified plant fibers and a method for preparing materials, the specific steps are as follows:
[0049] (1) Cut the sisal fiber to 5-10 mm by a fiber cutting machine, and perform steam explosion pretreatment.
[0050] (2) the sisal fiber after the steam explosion pretreatment described in sodium periodate and step (1) is added in the aqueous solution with the weight ratio of 2:1, is configured into the suspension that sodium periodate concentration is 20g / L . Then, it was stirred and reacted at 60° C. in the dark for 4 hours, filtered and washed to obtain oxidation-modified steam-exploded sisal fibers.
[0051] (3) Sodium borohydride and the oxidation-modified steam-exploded sisal fiber described in step (2) were added into the aqueous solution in a weight ratio of 0.5:1, and a suspension with a sodium borohydride concentration of 5 g / L was configured. Stir the reaction at room temperature for 4 hours...
Embodiment 3
[0056] A method for regulating the thermoplasticity and toughness of redox modified plant fibers and a method for preparing materials, the specific steps are as follows:
[0057] (1) Cut the sisal fiber to 5-10 mm by a fiber cutting machine, and perform steam explosion pretreatment.
[0058] (2) the sisal fiber after the steam explosion pretreatment described in sodium periodate and step (1) is added in the aqueous solution with the weight ratio of 2:1, is configured into the suspension that sodium periodate concentration is 20g / L . Then, it was stirred and reacted at 60° C. in the dark for 4 hours, filtered and washed to obtain oxidation-modified steam-exploded sisal fibers.
[0059] (3) Sodium borohydride and the oxidation-modified steam-exploded sisal fiber described in step (2) were added into the aqueous solution in a weight ratio of 0.5:1, and a suspension with a sodium borohydride concentration of 5 g / L was configured. Stir the reaction at room temperature for 4 hours...
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