Hydrogel filled with nitrogen-doped carbon nanotubes and preparation method of hydrogel

Abstract

The invention discloses hydrogel filled with nitrogen-doped carbon nanotubes and a preparation method of the hydrogel, and the method comprises the following steps: mixing a hydrogen bond acceptor compound, a hydrogen bond donor compound and a cross-linking agent, and stirring in an oil bath until transparent and clear liquid is obtained, so as to obtain deep eutectic solvent liquid; successively adding an initiator and a nitrogen-doped carbon nanotube into a deep eutectic solvent liquid at a temperature above 35 DEG C, uniformly stirring to form a mixture solution, transferring the formed mixture solution into a tubular reactor, heating the reactor by using a heat source to initiate a polymerization reaction, and evacuating the heat source till the liquid in the whole reactor is completely converted into polymer gel; and soaking and washing the polymer gel with distilled water, and freeze-drying to obtain the target nitrogen-doped carbon nanotube filled hydrogel. The reaction rate of front-end polymerization is increased by filling a small amount of nitrogen-doped carbon nanotubes with general applicability, so that the target hydrogel is rapidly prepared.

Description

technical field [0001] The invention relates to a rapid preparation method of hydrogel, in particular to a hydrogel filled with nitrogen-doped carbon nanotubes and a rapid preparation method thereof. Background technique [0002] At present, deep eutectic solvent (DES for short) is usually used to prepare hydrogel to improve its preparation speed. The eutectic solvent is mainly composed of hydrogen bond donors (polyols, urea, and carboxylic acids) and hydrogen bond acceptors (quaternary ammonium salts, such as choline chloride, etc.) to form eutectic solvents for binary and ternary systems. The most notable physical property of a solvent is the lowering of its melting point. [0003] There are the following four methods for rapid preparation of hydrogels using deep eutectic solvent (DES), but all have different defects, which will be described below. [0004] The first one: increase the speed by changing the type of hydrogen bond acceptor (HBA), because different types of ...

AI Technical Summary

Problems solved by technology

[0004] The first one: increase the speed by changing the type of hydrogen bond acceptor (HBA), because different types of hydrogen bond donors contain different types of functional groups, which can make the reaction process different, but there are many types of hydrogen bond acceptors, difficult to choose;

[0005] The second method: increase the speed by increasing the content of the crosslinking agent-N,N-methylenebisacrylamide (MBA), because increasing the crosslinking density can increase the polymerization rate, but N,N-methylenebisacrylamide The storage environment of amides is harsh, and this method needs to consume more medicines

[0006] The third: by increasing the content of the initiator-potassium persulfate (KPS), the synthesis of polymer chains is promoted, thereby increasing the speed, but potassium persulfate is harmful to the human body, and this method needs to consume more medicines

[0007] The fourth type: By changing the type of polymerization reaction, such as magnetothermal front-end polymerization, laser induction, etc., the reaction can be accelerated, but the equipment and instruments used in this method are complicated and expensive, and it is difficult to operate

[0008] To sum up, it can be seen that if deep eutectic solvents (DES) are used to prepare hydrogels, if you want to increase the reaction speed, you either need to spend a lot of energy to select drugs, or you need to spend more raw materials, or the equipment and instruments used Redundancy is expensive and difficult to operate

Images