Preparation method and application of anti-ultraviolet polymer material for paper cultural relics
A technology of polymer materials and paper cultural relics, applied in waste paper post-processing, printing post-processing, printing, etc., can solve the problem that ultraviolet aging does not have much effect, and achieve low viscosity, simple preparation process, and light transmittance Good results
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[0033] Preparation of regenerated cellulose
[0034] 5gMCC and 100mL low-temperature sodium hydroxide solution with a mass fraction of 8% were stirred rapidly at low temperature for 1h, and then centrifuged to obtain the supernatant; the supernatant was mixed with 100mL absolute ethanol, stirred rapidly, filtered, washed, and freeze-dried , to obtain regenerated cellulose.
[0035] Preparation of Modified Regenerated Cellulose
[0036] Stir 5 g of the regenerated cellulose prepared by the above method with 100 mL of 95% ethanol solution, add 0.4 g of KH-560, then raise the temperature to 80 ° C, and react for 1 h; filter, wash, and dry to obtain KH-560-modified regenerated cellulose.
Embodiment 1
[0038] In a 250mL four-neck flask, add 0.348g OP-10, 0.348g SDS and 24.741g deionized water, stir until dissolved, add 3.77g St, 4.05g MMA, 0.61gE-44, 26.06g BA, 0.242g AA, 3.48g DFMA, under the condition of 30℃, keep stirring and carry out the pre-emulsification reaction for 5h to obtain the shell pre-emulsion; take another four-neck bottle, add 0.116g OP-10, 0.116g SDS and 24.741g deionized water , Stir well until dissolved, add 0.383g of modified regenerated cellulose, react at 30°C for 5h, and obtain a nuclear monomer pre-emulsion. Dissolve 0.116g Na with 24.741g deionized water 2 HPO 4 Prepare buffer solution, dissolve 0.201g initiator KPS with 24.741g deionized water, then buffer solution, volume fraction Initiator solution and volume fraction The shell monomer pre-emulsion was added to the core monomer pre-emulsion, and the temperature was raised to 40°C; after the emulsion turned blue, the remaining shell monomer pre-emulsion and Initiator KPS solution, control ...
Embodiment 2
[0040] In a 250mL four-neck flask, add 0.458g OP-10, 0.305g SDS and 22.263g deionized water, stir until dissolved, add 3.77g St, 4.05g MMA, 0.699gE-44, 18.06g BA, 0.28g AA, 4.57g DFMA, under the condition of 40℃, keep stirring and carry out the pre-emulsification reaction for 3 hours to obtain the shell pre-emulsion; take another four-neck bottle, add 0.152g OP-10, 0.102g SDS and 22.263g deionized water , Stir well until dissolved, add 0.629g of modified regenerated cellulose, and react at 40°C for 3h to obtain a nuclear monomer pre-emulsion. Dissolve 0.129g Na with 22.263g deionized water 2 HPO 4 Prepare buffer solution, dissolve 0.193g initiator KPS with 22.263g deionized water, then buffer solution, volume fraction Initiator solution and volume fraction The shell monomer pre-emulsion was added to the core monomer pre-emulsion, and the temperature was raised to 50°C; after the emulsion turned blue, the remaining shell monomer pre-emulsion and Initiator KPS solution, c...
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