Preparation method and application of paper deacidification and enhancement repair liquid based on bacterial cellulose
A technology of bacterial cellulose and repair fluid, which is applied in the direction of reinforcing agent addition, post-treatment of waste paper, etc., can solve the problems of paper performance degradation, achieve the effect of improving mechanical properties, improving bonding stability, and realizing the integration of deacidification and strengthening
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Embodiment 1
[0035] Bacterial cellulose was secreted in vitro from Glucoacetobacter xylinus ATCC23767 provided by Nanjing High-tech University Institute of Technology. The main components of the bacterial culture medium are: 50 mL of fermented coconut water, 0.1 g of ammonium sulfate, 0.1 g of magnesium sulfate, 0.1 g of potassium dihydrogen phosphate, 3.0 g of sucrose, and 50 mL of distilled water. Bacteria for 5 min. Using the static fermentation culture method, the medium was placed in a 250 mL beaker, inoculated with 5% (V / V) Gluconacetobacter, and cultured statically at a temperature of 30 °C for 6 days. The obtained bacterial cellulose wet film had a solid content of 1.5 wt%.
[0036]60 g of bacterial cellulose (BC) wet film was cut into small pieces of 1 cm×1 cm×0.8 mm, and crushed 3 times in the instant mode by a laboratory mixer. The disintegrated BC was pre-cooled to -12 °C, mixed with NaOH solution (6 wt%) pre-cooled to 0 °C, poured into a beaker, and activated by magnetic sti...
Embodiment 2
[0040] Bacterial cellulose was secreted in vitro from Glucoacetobacter xylinus ATCC23767 provided by Nanjing High-tech University Institute of Technology. The main components of the bacterial culture medium are: 50 mL of fermented coconut water, 0.1 g of ammonium sulfate, 0.1 g of magnesium sulfate, 0.1 g of potassium dihydrogen phosphate, 3.0 g of sucrose, and 50 mL of distilled water. Bacteria for 5 min. Using the static fermentation culture method, the medium was placed in a 250 mL beaker, inoculated with 5% (V / V) Gluconacetobacter, and cultured statically at a temperature of 30 °C for 6 days. The obtained bacterial cellulose wet film had a solid content of 1.5 wt%.
[0041] 60 g of bacterial cellulose (BC) wet film was cut into small pieces of 1 cm×1 cm×0.8 mm, and crushed 3 times in the instant mode by a laboratory mixer. Soak the disintegrated BC in sodium hydroxide solution (10wt%) to swell, and stir at 350 rpm for 20 min. Next, 15 mL of ethylene oxide was added, rea...
Embodiment 3
[0046] Bacterial cellulose was secreted in vitro from Glucoacetobacter xylinus ATCC23767 provided by Nanjing High-tech University Institute of Technology. The main components of the bacterial culture medium are: 50 mL of fermented coconut water, 0.1 g of ammonium sulfate, 0.1 g of magnesium sulfate, 0.1 g of potassium dihydrogen phosphate, 3.0 g of sucrose, and 50 mL of distilled water. Bacteria for 5 min. Using the static fermentation culture method, the medium was placed in a 250 mL beaker, inoculated with 5% (V / V) Gluconacetobacter, and cultured statically at a temperature of 30 °C for 6 days. The obtained bacterial cellulose wet film had a solid content of 1.5wt%.
[0047] 60 g of bacterial cellulose (BC) wet film was cut into small pieces of 1 cm×1 cm×0.8 mm, and crushed 3 times in the instant mode by a laboratory mixer. Suspend the disintegrated BC in 100 mL of aqueous solution containing 1.4 g of 2,2,6,6-tetramethylpiperidine-nitrogen-oxide (TEMPO) and 9.0 g of sodium...
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