Preparation method of mulberry bark fibers
A mulberry fiber and pretreatment technology, which is applied in the direction of producing bast fiber by chemical method, can solve the problems of destroying the structure of mulberry fiber, long process flow, environmental pollution, etc.
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Embodiment 1
[0027] The mulberry bark is preliminarily removed from impurities, tied into a cage, and then soaked in a sulfuric acid solution with a bath ratio of 1:10, where the concentration of sulfuric acid is 3g / L, treated at room temperature for 30min, and then heated at 1°C / min Treat at 40°C for 30 minutes, then heat at 1°C / min to 60°C, and then treat for 60 minutes; wash with water until neutral. Then put it into the alkali-oxygen treatment solution, wherein the concentration of hydrogen peroxide is 30% hydrogen peroxide 40g / L, sodium borohydride 3g / L, sodium pyrophosphate 1g / L, the temperature is raised to 70°C at 1°C / min, and the treatment time is 45min. After the completion, proceed to supercritical carbon dioxide fluid degumming treatment, put the mulberry fiber into the supercritical fluid treatment device, first treat it at a pressure of 18MPa and a temperature of 110°C for 10 minutes, and then treat it at a pressure of 12MPa and a temperature of 100°C for 10 minutes , and th...
Embodiment 2
[0030] The mulberry bark is preliminarily removed from impurities, tied into a cage, and then soaked in a sulfuric acid solution with a bath ratio of 1:10, where the concentration of sulfuric acid is 5g / L, treated at room temperature for 20min, and then heated at 1°C / min Treat at 40°C for 30 minutes, then heat at 1°C / min to 60°C, and then treat for 60 minutes; wash with water until neutral. Then put it into the alkali-oxygen treatment solution, in which the hydrogen peroxide concentration is 30% hydrogen peroxide 60g / L, sodium borohydride 2g / L, sodium pyrophosphate 2g / L, 1°C / min heating temperature is 75°C, treatment time is 45min . After the completion, proceed to supercritical carbon dioxide fluid degumming treatment, put the mulberry fiber into the supercritical fluid treatment device, first treat it at a pressure of 18MPa and a temperature of 120°C for 10 minutes, and then treat it at a pressure of 12MPa and a temperature of 120°C 10min, and then under the condition of pr...
Embodiment 3
[0033] The mulberry bark is preliminarily removed from impurities, tied into a cage, and then soaked in a sulfuric acid solution with a bath ratio of 1:15, where the concentration of sulfuric acid is 5g / L, treated at room temperature for 30min, and then heated at 1°C / min Treat at 40°C for 30 minutes, then heat at 1°C / min to 60°C, and then treat for 60 minutes; wash with water until neutral. Then put it into the alkali-oxygen treatment solution, wherein the concentration of hydrogen peroxide is 30% hydrogen peroxide 50g / L, sodium borohydride 25g / L, sodium pyrophosphate 1g / L, the temperature is raised to 60°C at 1°C / min, and the treatment time is 45min. After the completion, proceed to supercritical carbon dioxide fluid degumming treatment, put the mulberry fiber into a supercritical fluid treatment device, first treat it at a pressure of 18MPa and a temperature of 100°C for 10 minutes, and then treat it at a pressure of 12MPa and a temperature of 100°C 10min, and then under th...
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