Environmental-friendly convenient paper cup
A convenient, paper-cup technology, applied in the field of cups, can solve the problems of inconvenient portability, difficulty in dissipating heat, and easy scalding, etc., and achieve the effect of simple overall structure of the cup body, convenient processing, and convenient processing
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Embodiment 1
[0037] Step 1: SiO x Preparation of carboxymethyl chitosan solution: under stirring at 30°C, add 1 mol / L sodium silicate solution dropwise to 10 mL of 3 mol / L hydrochloric acid solution until pH=4, stop stirring, and age for 2 h to obtain Acidic silica sol; adding 5g of carboxymethyl chitosan powder into 500mL of 1% tartaric acid solution by mass percentage to obtain a carboxymethyl chitosan solution with a mass volume concentration of 10g / L, stirring until completely dissolved to obtain carboxymethyl chitosan base chitosan solution; add 0.1g sodium caseinate to carboxymethyl chitosan solution and stir well, after it dissolves, add 30mL acidic silica sol under stirring condition, after mixing evenly, ultrasonic degassing 5min, get SiO x / carboxymethyl chitosan solution;
[0038] Step 2: Preparation of modified polylactic acid particles: Weigh 5g of polylactic acid particles and dissolve them in 100mL of acetonitrile to obtain a solution with a concentration of 0.05g / mL, add...
Embodiment 2
[0041] Step 1: SiO x Preparation of carboxymethyl chitosan solution: under stirring at 40°C, add 0.5 mol / L sodium silicate solution dropwise to 10 mL of 2 mol / L hydrochloric acid solution until pH = 4, stop stirring, and age for 3 h. Obtain acidic silica sol; add 10g carboxymethyl chitosan powder into 500mL of mass percentage in the tartaric acid solution of 2%, obtain the carboxymethyl chitosan solution that mass volume concentration is 20g / L, stir until dissolving completely, obtain carboxymethyl chitosan solution Methyl chitosan solution; add 0.2g sodium caseinate to carboxymethyl chitosan solution and stir well, after it dissolves, add 40mL acidic silica sol under stirring condition, after mixing evenly, ultrasonic Gas for 5-10min to get SiO x / carboxymethyl chitosan solution;
[0042] Step 2: Preparation of modified polylactic acid particles: Weigh 5g of polylactic acid particles and dissolve them in 100mL of acetonitrile to obtain a solution with a concentration of 0....
Embodiment 3
[0045] Step 1: SiO x Preparation of carboxymethyl chitosan solution: under stirring at 40°C, add 2 mol / L sodium silicate solution dropwise to 10 mL of 2 mol / L hydrochloric acid solution until pH=5, stop stirring, and age for 2 h to obtain Acidic silica sol; 7.5g carboxymethyl chitosan powder is added into 500mL mass percent as 2% citric acid solution to obtain a mass volume concentration of carboxymethyl chitosan solution of 15g / L, stirred until fully dissolved, to obtain Carboxymethyl chitosan solution; add 0.1g sodium hexametaphosphate to the carboxymethyl chitosan solution, stir and mix well, after it dissolves, add 50mL acidic silica sol under stirring condition, after mixing evenly, ultrasonic Degas for 8 minutes to get SiO x / carboxymethyl chitosan solution;
[0046] Step 2: Preparation of modified polylactic acid particles: Weigh 6g of polylactic acid particles and dissolve them in 100mL of acetone to obtain a solution with a concentration of 0.06g / mL, add 3g of PVP,...
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