Background and overview[1]
Polyethylene glycol diacrylate (PEGDA), as a derivative of polyethylene glycol, is an important biocompatible and degradable environmentally friendly polymer material that can react with heat, light and radiation. In this case, a certain amount of initiator is used to initiate the polymerization reaction. PEGDA has been widely used in polymer coatings, flexible devices, biomedicine and other fields.
Preparation[1-2]
Report 1,
S1. Vacuum-dry polyethylene glycol (PEG) at 50°C overnight, grind with K2CO3, vacuum-dry at 100°C overnight, and cool in vacuum;
S2. Dissolve 50g PEG in 100mL anhydrous dichloromethane in a 500mL three-necked flask. According to the amount shown in Table 2, add K2CO3 and stir thoroughly to disperse;
S3. Dissolve acryloyl chloride in anhydrous dichloromethane (1:10v/v) according to the amount shown in Table 2, and slowly add it to the three-necked flask drop by drop. The reaction is carried out at room temperature under nitrogen protection. 24h;
S4. Filter the mixture to remove the solid. The supernatant liquid is rotary evaporated at 37°C to remove most of the solvent, then fully precipitated with diethyl ether, washed with diethyl ether 3 to 5 times, and finally dried completely in a vacuum to obtain the product, which is polyethylene glycol. Alcohol diacrylate (PEGDA).
Report 2,
Synthesis of polyethylene glycol diacrylate: Add 10 grams of PEG powder to 100 ml of methylene chloride to dissolve, then add 2.02 grams of triethylamine and 1.81 grams of acryloyl chloride at room temperature. Then, the resulting mixture was stirred in an ice-water bath for 12 hours. Next, the triethylamine salt formed during the reaction was removed by filtration, and the obtained polyethylene glycol diacrylate was added to 1 liter of diethyl ether cooled to 4°C, and the purification was repeated four times while being isolated from the air. process. Finally, the collected polyethylene glycol diacrylate was dried in a vacuum oven at 35°C for 20 hours.
Apply[3]
CN202010304351.7 reports a preparation method of polyethylene glycol diacrylate-based gel electrolyte, which belongs to the field of lithium battery materials. This method uses polyethylene glycol diacrylate directly as the polymer matrix material of the gel electrolyte, which solves the problems of high production cost, environmental pollution and low ionic conductivity of traditional gel electrolytes. In this method, after mixing polyethylene glycol diacrylate monomer and liquid electrolyte evenly, cellulose and initiator are added to continue stirring to obtain a gel electrolyte precursor solution, and finally the gel electrolyte precursor solution is subjected to thermal polymerization to obtain polyethylene Glycol diacrylate based gel electrolyte. The invention provides a new direction for the use of polyethylene glycol diacrylate in gel electrolytes, and the prepared gel electrolyte has excellent electrochemical properties and is particularly suitable for large-scale production of gel electrolytes for lithium batteries. .
References
[1] [Chinese invention] CN202011014747.4 A hydrogel material and its preparation method and application
[2] [Invented in China] Non-foaming surfactant CN201910352003.4 is suitable for performance control and forming methods and products of dual-network smart hydrogels
[3] [Chinese invention] CN202010304351.7 Preparation method of polyethylene glycol diacrylate-based gel electrolyte
