Background and overview[1][2]
Organic cationic compounds are widely used in the petroleum industry, such as clay treatment agents, drilling fluids, completion fluids, acidification fluids, fracturing fluids, tertiary oil recovery, oil and gas field wastewater treatment, etc., and are widely used and rapidly development; it has also been widely used and achieved good results in protecting oil and gas layers and reducing formation damage. In particular, organic small cationic compounds can be adsorbed on the surface of clay in mud, neutralizing part of the negative charge of the clay, thereby inhibiting the expansion of the clay and playing a good stabilizing role. The organic cations currently produced in China and being used in domestic oil fields include: dimethylallylphenyl ammonium chloride, methacrylamide trimethylammonium chloride, dimethyl diallylammonium chloride, 3-Chloro-2-hydroxypropyltrimethylammonium chloride, 2-(methacryloyloxy)ethyltrimethylammonium chloride, etc., are all used well in fields such as oilfield chemistry. If the volume of the cation is larger, the steric hindrance will be greater and the action speed will be slower. At the same time, the molecular volume will become larger after the action, and the anti-swelling effect may not be ideal. The molecule of allyltrimethylammonium chloride is characterized by smaller volume and smaller steric hindrance. According to experimental measurements, the anti-swelling rate of clay of this compound is 15.3% higher than that of dimethylallylphenyl ammonium chloride. The effectiveness of clay treatments is better. At the same time, it can also produce two-molecular polymerization to become a dicationic polymer, and its relative molecular mass is not too large, which can maintain the good effectiveness of the clay treatment agent.
Apply[2-4]
Allyltrimethylammonium chloride is an organic cationic compound that is widely used in the petroleum industry, such as clay treatment agents, drilling fluids, completion fluids, acidizing fluids, fracturing fluids for 3rd oil recovery, and oil and gas field wastewater Processing and other aspects have been widely used and developed rapidly. Examples of its applications are as follows:
1. Preparation of PEDOT: PSS/chitosan/silver nanowire functionalized cotton fiber, using sodium hydroxide, allyltrimethylammonium chloride, and PAMAM modified cotton fabric to obtain cationized cotton fabric, and then The cationized cotton fabric was sequentially immersed in the silver nanowire solution modified by the hydroxyl-terminated hyperbranched polymer and the PEDOT:PSS?chitosan mixed solution for layer-by-layer self-assembly, and finally PEDOT:PSS/chitosan/silver was obtained. Nanowire functionalized cotton fibers. PEDOT: PSS? Chitosan and silver nanowires are firmly combined through layer-by-layer self-assembly through electrostatic attraction, giving cotton fiber excellent conductive, antibacterial, anti-UV and other properties. It is widely used in textiles, clothing, wearable devices, flexible conductive devices and other fields It has important application value.
2. Prepare graphene oxide/chitosan/silver nanowire functionalized cotton fiber, using sodium hydroxide, polyurethane raw material propyltrimethylammonium chloride, and PAMAM modified cotton fabric to obtain cationized cotton fabric. The cationized cotton fabric was then immersed in the silver nanowire solution modified by the hydroxyl-terminated hyperbranched polymer and the graphene oxide-chitosan mixed solution for self-assembly, and finally graphene oxide/chitosan/silver nanowires were obtained. Thread functionalized cotton fiber. Graphene oxide, chitosan and silver nanowires are firmly combined through self-assembly layer by layer through electrostatic attraction, giving cotton fiber excellent conductive, antibacterial, anti-ultraviolet and other properties. It has important application value.
3. Prepare an insulating and anti-corrosion solar backsheet material. The material includes the following components: PET, PVC, polyvinyl alcohol, zinc stearate, allyltrimethylammonium chloride, antioxidant, Auxiliary antioxidant, nitrile rubber, silica, peroxyethylene resin, dibutyl phthalate, m-xylylenediamine, water glass, propylene glycol, isopropyl palmitate and diglycidyl ether dimethyl Acrylate. The preparation method is to combine PET, PVC, polyvinyl alcohol, zinc stearate, allyltrimethylammonium chloride, nitrile rubber, silicon dioxide, peroxyethylene resin, dibutyl phthalate, m-phenylene Dimethylamine, water glass, propylene glycol, isopropyl palmitate and diglycidyl ether dimethacrylate are mixed evenly and transferred to the reaction kettle. After the vacuum heating reaction, the remaining components are added and extruded in a twin-screw extruder. Out of shape. The material provided by the invention has excellent comprehensive properties and can be widely used in solar backsheet materials.
Preparation[1]
The synthesis reaction formula of allyltrimethylammonium chloride is
The nitrogen atom of trimethylamine has a pair of lone electrons, which can serve as a nucleophile, while the polarization of the carbon-chlorine bond in allyl chloride makes the carbon atom partially positively charged, making it vulnerable to attack by nucleophiles. Hairpin generates nucleophilic substitution reactions. Therefore, the reaction process can be considered to be carried out according to the SN2 reaction mechanism and is expressed by the following formula.
Specific steps: Accurately weigh 33% trimethylamine solution and allyl chloride solution, mix and add them to a three-neck round bottom ground flask, then add polymerization inhibitor and antioxidant, and pass in nitrogen protection at the same time. Turn on the stirrer, keep the temperature constant at 50°C, and set the reaction time to 5h. After the reaction is completed, filter the reaction solution, and add pure water to the filtrate containing quaternary ammonium salt to prepare a 200.00mL solution for testing.
Main reference materials
[1] Synthesis and structural analysis of allyltrimethylammonium chloride
[2] CN201710836975.1PEDOT: PSS/chitosan/silver nanowire functionalized cotton fiber
[3] CN201710836978.5 Graphene oxide/chitosan/silver nanowire functionalized cotton fiber
[4] CN201410649072.9 An insulation resistorMaterials for etched solar backsheets and preparation methods thereof
