Method of making a polyacrylate / amino modified graphene oxide coating for artificial leather using the ultrasound-assisted method

摘要

A method of making a polyacrylate / amino modified graphene oxide faux leather coating composition using the ultrasound-assisted method comprising the steps of: Step 1: preparing an amino-modified graphene oxide comprising 0.5 to 0.7 parts graphene oxide, 40 to 50 parts thionyl chloride, and 2.0 to 2.2 parts of dimethylformamide is carried out in a three-necked flask for 60 minutes ultrasonic dispersion, then nitrogen protection is added and allowed to reflux for 240 minutes at 70 ° C to 80 ° C, then 60 to 80 parts of dimethylformamide added and rotary evaporated to a constant Weight is reached, to give GO-1, the GO-1 is stirred in the beaker below 0 ° C, while in order 6 to 8 parts of triethylamine and 2 to 4 parts of a 25% NH.H 2 O solution added Stirred for 60 min and then filtered, by rinsing with water, GO-2 is obtained in the cup 30 to 34 An Add distilled water of 0 ° C and place in the ice bath, add 3.0 to 3.8 parts of sodium hydroxide and 2.0 to 2.2 parts of bromine and stir for 15 min, then add GO-2, the reaction takes under 85 ° C for 180 minutes, when heated to 90 ° C for 60 minutes, then filtered and washed with water until a pH of 7 is reached, the product obtained is dissolved in distilled water, after drying amino-modified graphene oxide in powder form Step 2: Preparation of Polyacrylate / Amino Modified Graphene Oxide Faux Leather: 130 parts of deionized water are heated to 30 ° C in a four necked flask with thermometer, then 0.4 parts of polyvinyl alcohol 400 and 1.2 parts of sodium dodecyl sulfate are added, the temperature maintained until it is uniformly dissolved, then 7 parts of methyl methacrylate, 10 parts of butyl acrylate, 4 parts of acrylic acid and Add 1 to 3 parts of hydroxyethyl acrylate and emulsify at 300 rpm for 20 minutes, the system temperature rises to 75 ° C, after the reflux is stable, add 27 parts of methyl methacrylate, 40 parts of butyl acrylate, 3 to 4 parts of hydroxyethyl acrylate and initiator solution containing initiator solution from 1.2 parts of ammonium persulfate and 85 parts of deionized water, during the addition the temperature must remain constant and the reflux stable, after adding to 85 ° C the mixture is heated and the temperature kept constant for 60 minutes, after lowering the temperature becomes the polyacrylate emulsion 30 to 40 parts of polyacrylate emulsion are adjusted to a pH between 4.0 and 8.0 using ammonia liquid, then 0.01 part of the amino-modified graphene oxide powder is added and stirred for 30 minutes, followed by 20 minutes of ultrasonic dispersion to obtain the coating composition of polyacrylate / am inomodified graphene oxide for artificial leather.