A kind of preparation method of silane coupling agent reinforced lignocellulose-based composite gel material
A lignocellulose-based, silane coupling agent technology is applied in the field of adding inorganic fibers and silane coupling agents and undergoing a certain cross-linking reaction to improve the gel strength. It can solve the problems of difficulty in direct application and poor strength, and achieve The effect of easy industrialization, simple and controllable operation, and low production cost
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Embodiment 1
[0029] Take 0.2g of silane coupling agent KH550, and dissolve it in 20g of 86.7% N-methylmorpholine-N-oxide (NMMO) aqueous solution at 85°C in a water bath to obtain a KH550 / NMMO aqueous solution with a KH550 content of 1%.
[0030] Take 0.5g pretreated lignocellulose dry sample with a lignin content of 6%, add 15.92g of 86.7% NMMO aqueous solution, place it in a water bath at 85°C for 3 hours, and stir at a speed of 400r / min. After the element sample is fully dissolved, add 0.25g of hydrolyzed KH550-NMMO·H 2 After O cross-linking reaction for 1 h, the modified lignocellulose solution was obtained. The lignocellulose content in the obtained lignocellulose solution is 3%, the KH550 content is 0.015%, the NMMO is 83%, and the rest is water.
[0031] Pour the prepared modified lignocellulose solution into a clean petri dish, place it in an ethanol regeneration steam bath for solvent replacement, and change the ethanol every few hours to ensure that the solvent is completely repl...
Embodiment 2
[0033] Take 0.5g pretreated lignocellulose dry sample with a lignin content of 6%, add 15.42g of 86.7% NMMO aqueous solution, place it in a water bath at 85°C for 3 hours, and stir at a speed of 400r / min. After the plain sample was fully dissolved, 0.75 g of hydrolyzed KH550 / NMMO aqueous solution was added for cross-linking reaction for 1 hour to obtain a modified lignocellulose solution. The lignocellulose content in the obtained lignocellulose solution is 3%, the KH550 content is 0.045%, the NMMO content is 83%, and the rest is water.
[0034] Pour the prepared modified lignocellulose solution into a clean petri dish, place it in an ethanol regeneration steam bath for solvent replacement, and change the ethanol every few hours to ensure that the solvent is completely replaced, and use a rheometer to measure its condensation. Viscoelasticity characterizes its strength.
Embodiment 3
[0036] Take 0.17g of pretreated lignocellulose dry sample with lignin content of 6%, add 16.33g of 86.7% NMMO aqueous solution, put it in a water bath at 85°C for 3 hours, and stir it mechanically at 400r / min. After the plain sample was fully dissolved, 0.17 g of hydrolyzed 1% KH550 / NMMO aqueous solution was added for cross-linking reaction for 1 hour to obtain a modified lignocellulose solution. The lignocellulose content in the obtained lignocellulose solution is 1%, the KH550 content is 0.01%, the NMMO content is 85.7%, and the rest is water.
[0037] Pour the prepared modified lignocellulose solution into a clean petri dish, place it in an ethanol regeneration steam bath for solvent replacement, and change the ethanol every few hours to ensure that the solvent is completely replaced, and use a rheometer to measure its condensation. Viscoelasticity characterizes its strength.
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