A kind of graphene oxide loaded renewable antibacterial polypropylene material and preparation method thereof
An antibacterial polypropylene and graphene technology, applied in protective clothing, clothing, clothing and other directions, can solve the problem of non-recyclable antibacterial polypropylene, and achieve the effect of good antibacterial performance
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Embodiment 1
[0028] Preparation of small molecule chain transfer agents.
[0029] A 100mL three-necked flask equipped with a water separator, a thermometer and a reflux condenser was placed on a stirrer, and bis(carboxymethyl)trithiocarbonate (1.12g, 5.0mmol), N,N-dimethyl Diethylisopropanolamine (0.67g, 6.5mmol), (0.026g, 0.15mmol) p-toluenesulfonic acid and 50mL toluene, heated to reflux at 130°C for 2.0h, cooled the reaction solution to below 30°C, poured it into a separatory funnel, with saturated NaHCO 3 solution, saturated NaCl solution, saturated CaCl 2 solution washing, and finally add an appropriate amount of anhydrous MgSO 4 Drying overnight, fractional distillation, and collection of corresponding fractions gave 1.38 g of small molecule chain transfer agent with a yield of 84.2%.
Embodiment 2
[0031] Preparation of Macromolecular Precursor PP by Esterification
[0032] Add bis(carboxymethyl)trithiocarbonate (1.12g, 5.0mmol) and 20ml of anhydrous tetrahydrofuran THF into a 50mL branched-necked flask. After the reaction temperature rises to 70°C, slowly add SOCl 2 (3.6ml, 5.0mmol), the dropwise addition was completed and the reaction was 1.5h. After the reaction was completed, the SOCl was distilled off under reduced pressure. 2 and THF to obtain bis(carboxymethyl) trithiocarbonate acid chloride product, add an appropriate amount of toluene to dissolve.
[0033] In a 50ml Schlenk bottle, add single-end hydroxylated polypropylene (0.84g, 1.0mmol), N 2 Under protection, add 40ml of anhydrous toluene with a disposable syringe, slowly raise the temperature to 70°C, inject 1ml of pyridine after the single-end hydroxyl polypropylene is completely dissolved, stir for 30min, then add the above-mentioned bis(carboxymethyl)trithiocarbonate dropwise Acyl chlorination product o...
Embodiment 3
[0035] Preparation of block copolymers of antimicrobial polypropylene and poly-4-vinylbenzaldehyde.
[0036] Add macromolecular precursor PP (0.0232g, 0.01mmol), monomer 4-vinylbenzaldehyde (0.6608g, 5mmol), initiator azobisisobutyronitrile AIBN (0.066g, 0.4mmol) into a 10ml Schlenk bottle After pumping nitrogen three times, 5 mL of dioxane was added, and the flask containing the mixture was placed in an oil bath at 75° C. for 4 h. After the reaction time is up, the reaction is terminated, and the precipitant methanol / water is used to precipitate 3 times to remove the remaining monomers and impurities, and then dried in vacuum at 45°C to constant weight to obtain antibacterial polypropylene and poly-4-vinylbenzaldehyde block Copolymer 0.063g, yield 71.3%.
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