A pretreatment method for preparing micro-nano fibrils from plant fibers with high crystallinity
A plant fiber, high crystallinity technology, applied in the use of microbial/enzymatic cellulose treatment, fiber raw material treatment, papermaking, etc., can solve the problems of high energy consumption of nanocellulose, excessive fiber size, and blocked pipelines, etc., to achieve The effect of reducing energy consumption, ensuring yield, and reducing manufacturing costs
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Embodiment 1
[0023] Add acetic acid-sodium acetate buffer solution with a pH of 4.8 to 5.0 g of algae fibers with a crystallinity of 95.2%, and stir evenly to obtain a plant fiber dispersion, wherein the concentration of algae fibers in the plant fiber dispersion is 2.0 wt%. Add 3 IU / g Novozyme Fibercare ® The endo-cellulase (enzyme dosage per gram of algae fiber) was stirred and reacted at 45°C for 48 h. After the reaction, the yield of fiber residue was 96.8%, and the degree of polymerization was reduced by 40%. Separation of plant fiber residue and enzymatic hydrolysis solution, the obtained plant fiber residue is mechanically homogenized by a high-pressure micro-jet nano-homogenizer to prepare micro-nanofibrils, and the enzymatic hydrolysis solution containing active cellulase is continuously reused for high crystallinity The pretreatment of algae fiber, the pretreatment condition is consistent with this embodiment above. The high crystallinity algae fibers were pretreated with cellu...
Embodiment 2
[0025] In 3.0 g of hemp fibers with a crystallinity of 85.0%, add acetic acid-sodium acetate buffer solution with a pH of 4.8 and stir evenly to obtain a plant fiber dispersion, wherein the concentration of hemp fibers in the plant fiber dispersion is 10.0 wt%. ; Then add 10 IU / g Novozyme Fibercare® endocellulase (the amount of enzyme is relative to each gram of hemp fiber), and stir and react at 65°C for 24 h. After the reaction, the yield of fiber residue is 97.5%, and the degree of polymerization A reduction of 55.6%. Separation of plant fiber residue and enzymatic hydrolysis solution, the obtained plant fiber residue is mechanically homogenized by a high-pressure micro-jet nano-homogenizer to prepare micro-nanofibrils, and the enzymatic hydrolysis solution containing active cellulase is continuously reused for high crystallinity The pretreatment of hemp fiber, the pretreatment condition is consistent with this embodiment aforementioned. The hemp fiber with high crystallin...
Embodiment 3
[0027] Add acetic acid-sodium acetate buffer solution with a pH of 5.0 to 4.5 g of algae fibers with a crystallinity of 91.5%, and stir evenly to obtain a plant fiber dispersion, wherein the concentration of algae fibers in the plant fiber dispersion is 5.0 wt%; Add 8IU / g Novozyme Fibercare® endocellulase (the amount of enzyme is relative to each gram of algae fiber), and stir at 55°C for 32 hours. After the reaction, the yield of fiber residue is 95.0%, and the degree of polymerization is reduced by 50.0%. . Separation of plant fiber residue and enzymatic hydrolysis solution, the obtained plant fiber residue is mechanically homogenized by a high-pressure micro-jet nano-homogenizer to prepare micro-nanofibrils, and the enzymatic hydrolysis solution containing active cellulase is continuously reused for high crystallinity The pretreatment of algae fiber, the pretreatment condition is consistent with this embodiment above. The high crystallinity algae fibers were pretreated wit...
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