CN115651118A - Underwater self-adhesive and self-repairing transparent ion-conductive elastomer and synthesis method thereof - Google Patents
Underwater self-adhesive and self-repairing transparent ion-conductive elastomer and synthesis method thereof Download PDFInfo
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Abstract
The invention provides an underwater self-adhesive and self-repairing transparent ion-conductive elastomer and a synthesis method thereof, wherein the preparation method comprises the following steps: firstly, preparing a polymerizable hydrophobic eutectic solvent from a hydrophobic soft and hard monomer, a long-chain quaternary ammonium salt and a hydrogen bond donor according to a certain molar ratio; then adding an initiator into the polymerizable hydrophobic eutectic solvent to prepare a prepolymer solution; and finally, polymerizing the prepolymer solution by ultraviolet light or heat initiation to prepare the transparent ion-conductive elastomer capable of self-adhesion and self-repair under water. The preparation process does not involve organic solvents and VOC, and has the advantages of simple process, greenness, environmental friendliness and low cost; the transparent ion-conductive elastomer still has strong adhesion and instant self-repairing function under the water environment.
Description
Technical Field
The invention relates to the field of functional elastomer materials, in particular to the technical field of elastomers with self-repairing functions, and specifically relates to an underwater self-adhesion and self-repairing transparent ion-conductive elastomer and a synthesis method thereof.
Background
The self-adhesion and self-repair material has wide application prospect in the fields of tissue engineering, flexible electronics, intelligent packaging, environment and energy. However, most materials that are self-adhering and self-healing in air environments do not necessarily have the same ability to adhere underwater. This is because water molecules can plasticize and penetrate into the polymer network, thereby greatly weakening the intermolecular interactions. Therefore, it is challenging to construct a self-adhering, self-healing material that is not sensitive to water.
Existing eutectic solvents typically consist of cheap and safe hydrogen bond donors and hydrogen bond acceptors that can associate through hydrogen bond interactions to form a eutectic mixture. The use of eutectic solvents to prepare functional materials is clearly green, low cost and promising, but to date, most of the reported eutectic solvents are hydrophilic. According to the prior reports, the water content of a hydrophilic eutectic solvent loses its eutectic properties when it exceeds a certain threshold. Therefore, materials prepared by using the hydrophilic eutectic solvent are also very easily affected by external water molecules or changes in environmental humidity, so that the overall performance of the materials is deteriorated, for example, the mechanical strength is seriously reduced or the original function is lost, thereby limiting the wide application of the eutectic solvent.
Thus, in contrast, hydrophobic eutectic solvents have many advantages over hydrophilic eutectic solvents in terms of density, viscosity, acidity, polarity, volatility, etc. Even if the hydrophobic eutectic solvent is miscible with water, a distinct two-phase separation interface can still be created, and thus the influence of water molecules can be largely avoided. However, the application range of the hydrophobic eutectic solvent is limited at present, and particularly, the hydrophobic eutectic solvent is not used for preparing the elastomer with the characteristics of underwater self-adhesion, self-repairing, transparency and ion conduction in the technical field, especially in the field of the eutectic solvent.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide an underwater self-adhesive and self-repairing transparent ion-conductive elastomer and a synthetic method thereof, which are used for solving the difficulties of the prior art.
To achieve the above and other related objects, the present invention provides a method for synthesizing an underwater self-adhesive self-repairing transparent ion-conducting elastomer, comprising:
step S1: weighing long-chain quaternary ammonium salt and a hydrogen bond donor according to a molar ratio of 2;
step S2: adding a hydrophobic soft monomer and a hydrophobic hard monomer into the hydrophobic eutectic solvent, and uniformly mixing to obtain a polymerizable hydrophobic eutectic solvent;
and step S3: adding an initiator into the polymerizable hydrophobic eutectic solvent, and uniformly mixing to obtain a prepolymer solution;
and step S4: and (3) carrying out ultraviolet light irradiation or thermal initiation polymerization reaction on the prepolymer solution to prepare the underwater self-adhesion and self-repairing transparent ion-conductive elastomer.
The hydrophobic eutectic solvent system has high designability, so that the scheme uses the highly-transparent ion-conductive hydrophobic eutectic solvent as a microreactor of monomers, introduces soft and hard polymerizable monomers to regulate and control the overall performance, and simultaneously utilizes the abundant hydrogen bonds, pi-pi interaction, cation-pi interaction, ion-dipole and hydrophobic interaction in the hydrophobic low eutectic solvent system to endow the prepared polymer with high-efficiency dynamic interaction, the interaction is not influenced even in the presence of water environment, the characteristics of high transparency and ion conductivity are retained, and the instant underwater self-adhesion and self-repair process of the elastomer is further realized.
According to a preferable scheme, in the step S1, one or more of triethyl benzyl ammonium chloride, tetraethyl ammonium chloride and benzethonium chloride is adopted as the long-chain quaternary ammonium salt.
According to a preferable scheme, in the step S1, one or more of thymol, lidocaine and ibuprofen are adopted as hydrogen bond donors.
According to a preferable scheme, in the step S2, the hydrophobic soft monomer adopts 2-phenoxyethyl acrylate, and the hydrophobic hard monomer adopts isobornyl acrylate.
According to a preferred embodiment, in step S2, the molar ratio of the hydrophobic soft monomer to the hydrophobic hard monomer is 3.
According to a preferred embodiment, in step S3, an initiator or a thermal initiator is used as the initiator.
According to a preferable scheme, the photoinitiator adopts at least one of benzoin and derivative photoinitiators, benzil photoinitiators, alkylbenzene ketone photoinitiators and acyl phosphorus oxide photoinitiators.
According to a preferred embodiment, the thermal initiator is an organic peroxide initiator or an azo initiator.
The invention also provides an underwater self-adhesive and self-repairing transparent ion-conductive elastomer which is prepared by any one of the underwater self-adhesive and self-repairing transparent ion-conductive elastomers and the synthesis method thereof.
The invention relates to a synthesis method of an underwater self-adhesive and self-repairing transparent ion conductive elastomer, which adopts a hydrophobic hydrogen bond donor and a long-chain quaternary ammonium salt, introduces a hydrophobic soft monomer and a hydrophobic hard monomer, realizes the preparation purpose by utilizing the intermolecular action under the actions of abundant hydrogen bonds (among all components), pi-pi interaction (between the soft monomer and the hydrogen bond donor, between the soft monomer and the hydrogen bond acceptor), cation-pi action (between the hydrogen bond acceptor and the soft monomer and between the hydrogen bond donor) and ion-dipole (between the hydrogen bond acceptor and other), and simultaneously prepares the transparent ion conductive elastomer capable of underwater self-adhesive and self-repairing by utilizing the rapid polymerization capability of the hydrophobic monomer;
the method specifically comprises the following beneficial effects:
(1) The method has the advantages of environmental friendliness, simple and green process and low cost: the hydrogen bond donor selected in the hydrophobic eutectic solvent is a natural component, the hydrogen bond acceptor is long-chain quaternary ammonium salt, and no organic solvent or VOC is generated in the preparation process, and the preparation method and the prepared elastomer are environment-friendly, simple in process, green and low in cost;
(2) The optical and mechanical properties are good: the elastomer has good optical, mechanical, electrical, self-repairing and self-adhering performances, and the performances are not influenced by external moisture;
(3) The underwater self-repairing performance is as follows: after the elastomer is broken, the elastomer can be immediately and spontaneously repaired together even in a water environment;
(4) The underwater self-adhesion performance is achieved: the elastomer can be used as a coating for underwater self adhesion, and the adhesion performance is not influenced by moisture;
(5) The application prospect is as follows: the material has wide application prospect in the fields of future flexible self-repairing base materials, self-adhesive polymer materials, functional hydrophobic coatings, intelligent materials and the like.
The following description of the preferred embodiments for carrying out the present invention will be made in detail with reference to the accompanying drawings so that the features and advantages of the present invention can be easily understood.
Drawings
FIG. 1 shows nuclear magnetism of polymerizable hydrophobic eutectic solvent prepared in example 1 1 H, spectrogram;
FIG. 2 is an infrared spectrum of the polymerizable hydrophobic eutectic solvent prepared in example 1 before and after polymerization;
FIG. 3 is an optical photograph of the transparent ion-conductive elastomer prepared in example 1 self-adhered underwater;
FIG. 4 is an optical photograph of the underwater self-repair of the transparent ion-conducting elastomer prepared in example 1;
FIG. 5 is an optical photograph of the underwater real-time electrical self-repair of the transparent ion-conducting elastomer prepared in example 1;
FIG. 6 is a visible light transmittance spectrum of the underwater self-adhering, self-healing transparent ion-conducting elastomer prepared in examples 1-5;
FIG. 7 is a stress-strain curve of the underwater self-adhering, self-healing transparent ion-conducting elastomer prepared in examples 1-5;
FIG. 8 is a graph of the cyclic stretch at 500% large deformation for the underwater self-adhering, self-healing transparent ion-conducting elastomer prepared in example 2;
FIG. 9 is a scanning electron micrograph of a lower self-adhering, self-healing transparent ionically conductive elastomer prepared according to examples 1-3;
FIG. 10 is a graph of lap-shear adhesion strength on various substrates for the lower self-adhering, self-healing transparent ion-conducting elastomers prepared in examples 1-5.
Detailed Description
In order to make the objects, technical solutions and advantages of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without inventive step, are within the scope of protection of the invention.
Possible embodiments within the scope of protection of the invention may have fewer components than the examples shown in the figures, have other components not shown in the figures, different components, differently arranged components or differently connected components, etc. Further, two or more of the components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as a plurality of separate components.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
The invention provides an underwater self-adhesive and self-repairing transparent ion-conductive elastomer and a synthesis method thereof, which are used in the technical field of elastomers with flexible hydrophobic, underwater self-adhesive and self-repairing functions.
In order to achieve the purpose that the elastomer still has self-adhesion in a water environment and the adhesion performance is not affected by water, obtain the capacity that the elastomer can be instantly and spontaneously repaired together even in the water environment after the elastomer is fractured, and simultaneously obtain good optical, mechanical, electrical, self-repairing and self-adhesion performances, solve the problem that the mechanical strength of the material prepared by the existing eutectic solvent is seriously reduced or unstable in the background technology, and make up the vacancy that the hydrophobic eutectic solvent is used for preparing the transparent ion-conductive elastomer capable of realizing the underwater self-adhesion and the self-repair, the technical scheme provides the following embodiments.
The hydrophobic eutectic solvent system has high designability, so the proposal proposes that the hydrophobic eutectic solvent with high transparency and ion conductivity is used as a microreactor of monomers, soft and hard polymerizable monomers are introduced to regulate the overall performance, and meanwhile, polymers with high-efficiency dynamic interaction are prepared by utilizing rich hydrogen bonds, pi-pi interaction, cation-pi interaction, ion-dipole and hydrophobic interaction in the hydrophobic eutectic solvent system, and the interaction is not influenced even in a water environment, thereby realizing the instant underwater self-adhesion and self-repair process.
Compared with the polymer which can be repaired underwater and reported at present, the scheme has the characteristic of 'integrated' preparation, does not need complex chemical synthesis and organic solvent, and has the characteristics of high transparency, intrinsic ion conduction, underwater self-adhesion and self-repair; in addition, the scheme does not use fluorine element, does not have the defects of liquid leakage, liquid volatilization, pH sensitivity and the like, and is simple and feasible as a whole, green, low in cost and strong in applicability.
Example one
The synthesis method of the underwater self-adhesive and self-repairing transparent ion-conductive elastomer comprises the following steps:
step S1: weighing 2.28g of triethyl benzyl ammonium chloride and 3g of thymol, wherein the molar ratio of the triethyl benzyl ammonium chloride to the thymol is 1;
step S2: adding 3.84g of 2-phenoxyethyl acrylate and 4.17g of isobornyl acrylate into the hydrophobic eutectic solvent prepared in the step S1, uniformly mixing, wherein the ratio of soft monomers to hard monomers is 1;
and step S3: adding 0.2g of an alkylbenzene photoinitiator into the solution prepared in the step S2, and uniformly mixing to prepare a prepolymer solution;
and step S4: and (4) placing the prepolymer solution prepared in the step (S3) between glass plates with the surfaces covered by release films, and then placing the glass plates under an ultraviolet lamp of 2kW for irradiating for 5min to finally prepare the transparent ion conductive elastomer capable of self-adhering and self-repairing underwater.
Verification results for example one:
(1) Environmental friendliness
As shown in fig. 1, a nuclear magnetic hydrogen spectrum of the polymerizable hydrophobic eutectic solvent prepared by the method of example 1 is obtained by chemical shift change in the figure because the preparation process is only formed by hydrogen bond interaction between the components, and no chemical reaction occurs between the components during the heating process;
as shown in fig. 2, is an infrared spectrum before and after polymerization of the polymerizable hydrophobic eutectic solvent prepared by the method of example 1: in the figure, at a wave number of 1635cm & lt-1 & gt, the absorption intensity after polymerization is greatly reduced, which indicates that soft and hard monomers are subjected to polymerization reaction to form a polymer network;
therefore, the synthesis method provided in this example does not involve any organic solvent and VOC generation during the preparation process, and both the preparation method and the prepared elastomer are green and environmentally friendly.
(2) Adhesion performance, self-repairing performance and self-repairing performance of underwater electricity
(2.1) as shown in FIG. 3, is an optical photo of the transparent underwater self-adhesive self-repairing ion-conductive elastomer prepared by the method of example 1, which is instantly self-adhered under water:
in the figure, the prepared material can be easily adhered to materials such as steel, ceramics, glass, polypropylene, rubber, polytetrafluoroethylene and the like under water, and shows excellent adhesion performance.
In addition, as shown in fig. 10, the overall adhesion strength is about 10kPa for the lap-shear test of the transparent ion-conducting elastomer capable of self-adhesion and self-repair under water prepared by the method of example 1, indicating good adhesion performance.
(2.2) as shown in FIG. 4, is an optical photo of the transparent under water self-adhesive and self-repairing ion-conductive elastomer prepared by the method of example 1, which is self-repairing under water instantly:
the left-most drawing, showing the transparent ion-conducting elastomer completely cut into two sections under water;
the middle panel, showing two sections of material being re-attached under water;
in the right-most graph, it was found that the fracture surfaces could be repaired together and could be stretched back to some deformation, indicating their excellent underwater self-healing performance.
(2.3) as shown in fig. 5, in order that the transparent self-adhesive and self-repairing under water ion-conductive elastomer prepared by the method of example 1 can conduct electricity under water:
in the figure on the left side, the transparent ion conductive elastomer which is cut into two sections is separated underwater, the contacts are respectively contacted with the two sections of materials, and the bulb is not bright;
the figure on the right shows that the two sections of transparent ion-conducting elastomers are reconnected together underwater after being cut off, and the contacts are respectively contacted with the two sections of materials, so that the small bulb can still emit light, and the excellent underwater electrical self-repairing performance is shown.
(3) The material is transparent and has good optical performance
As shown in fig. 6, the average optical transmittance of the transparent ion-conducting elastomer capable of self-adhesion and self-repairing under water prepared by the method of example 1 is about 92%, which shows the excellent optical transparency.
(4) Good mechanical property
As shown in FIG. 7, the stress-strain curve of the transparent underwater self-adhesive and self-repairing ion-conductive elastomer prepared by the method of example 1 shows that the maximum deformation is about 660% and the maximum stress is 0.46MPa, which indicates excellent mechanical strength and stretchability.
As shown in fig. 8, in order to obtain a cyclic tensile stress-strain curve of the transparent ion conductive elastomer capable of self-adhesion and self-repair under water prepared by the method of example 1, the setting deformation is 500%, and it can be known from the curve that the transparent ion conductive elastomer can withstand at least 5 times of continuous stretching-recovery cycles, and in the curve, even after 5 times or more of continuous stretching-recovery cycles, the elastomer can have a certain hysteresis loop to generate energy dissipation, and thus can withstand continuous stretching under large deformation, indicating excellent elasticity and stretchability.
As shown in fig. 9, it is a scanning electron microscope image of the transparent ion-conductive elastomer capable of self-adhesion and self-repair under water prepared by the method of example 1. In comparative examples 2 and 3, since the ratio of soft and hard monomers is 1, the polymer segment is relatively uniformly entangled, and has good optical transmittance and adhesion properties.
Example two
The synthesis method of the underwater self-adhesive and self-repairing transparent ion-conductive elastomer comprises the following steps:
step S1: weighing 2.28g of triethyl benzyl ammonium chloride and 3g of thymol, wherein the molar ratio of the triethyl benzyl ammonium chloride to the thymol is 1;
step S2: adding 3.84g of 2-phenoxyethyl acrylate and 2.08g of isobornyl acrylate into the hydrophobic eutectic solvent prepared in the step S1, wherein the proportion of soft monomers and hard monomers is 2;
and step S3: adding 0.3g of benzoin and a derivative photoinitiator into the solution prepared in the step S2, and uniformly mixing to prepare a prepolymer solution;
and step S4: and (4) placing the prepolymer solution prepared in the step (S3) between glass plates with surfaces covered by release films at the upper and lower parts, and then placing the glass plates under an ultraviolet lamp of 2kW for irradiating for 5min to finally prepare the transparent ion conductive elastomer capable of self-adhering and self-repairing under water.
Verification results for example two:
(1) The results regarding environmental friendliness, underwater adhesion performance, underwater self-repair performance, and underwater electrical self-repair performance are similar to the examples, with specific reference to fig. 1-5.
Further, as shown in fig. 10, a lap-shear test of the self-adhesive and self-repairing underwater transparent ion-conductive elastomer prepared by the method of example 2, in which the adhesive strength on the aluminum plate was the largest, around 38kPa, showed good adhesive properties.
(2) Good optical properties with respect to material transparency
As shown in fig. 6, the average optical transmittance of the transparent ion-conducting elastomer capable of self-adhesion and self-repairing under water prepared by the method of example 2 is about 88%, which indicates its excellent optical transparency.
(3) Good mechanical property and adhesion property
As shown in FIG. 7, the stress-strain curve of the transparent underwater self-adhesive and self-repairing ion-conductive elastomer prepared by the method of example 2 shows that the maximum deformation is about 380% and the maximum stress is 0.2MPa, which indicates excellent mechanical strength and stretchability.
As shown in fig. 9, it is a scanning electron microscope image of the transparent ion-conductive elastomer capable of self-adhesion and self-repair under water prepared by the method of example 2. Comparing examples 1 and 3, since the ratio of soft and hard monomers is 2, polymer segment entanglement is relatively fine, and it can be used to embody stronger adhesion property of example 2 compared to examples 1 and 3.
EXAMPLE III
An underwater self-adhesive and self-repairing transparent ion-conductive elastomer and a synthetic method thereof comprise the following steps:
step S1: weighing 2.28g of triethyl benzyl ammonium chloride and 3g of thymol, wherein the molar ratio of the triethyl benzyl ammonium chloride to the thymol is 1;
step S2: adding 5.77g of 2-phenoxyethyl acrylate and 2.08g of isobornyl acrylate to the hydrophobic eutectic solvent prepared in the step S1, and uniformly mixing to prepare a polymerizable hydrophobic eutectic solvent;
and step S3: adding 0.4g of benzil photoinitiator into the solution prepared in the step S2, and uniformly mixing to prepare a prepolymer solution;
and step S4: and (4) placing the prepolymer solution prepared in the step (S3) between glass plates with surfaces covered by release films at the upper and lower parts, and then placing the glass plates under an ultraviolet lamp of 2kW for irradiating for 5min to finally prepare the transparent ion conductive elastomer capable of self-adhering and self-repairing under water.
Verification results for example three:
(1) The results regarding environmental friendliness, underwater adhesion performance, underwater self-repair performance, and underwater electrical self-repair performance are similar to the examples, with specific reference to fig. 1-5.
In addition, as shown in fig. 10, the overall adhesion strength is about 10kPa for the lap-shear test of the transparent ion-conducting elastomer capable of self-adhesion and self-repair under water prepared by the method of example 3, indicating good adhesion performance.
(2) Good optical properties with respect to material transparency
As shown in fig. 6, the average optical transmittance of the visible light transmittance curve of the transparent self-adhesive and self-repairing underwater ion-conductive elastomer prepared by the method of example 3 is about 90%, which indicates the excellent optical transparency.
(3) Good mechanical property and adhesion property
As shown in fig. 9, it is a scanning electron microscope image of the transparent ion conductive elastomer capable of self-adhesion and self-repair under water prepared by the method of example 3. Comparing examples 1 and 2, since the ratio of soft and hard monomers is 1.
As shown in FIG. 7, the stress-strain curve of the transparent underwater self-adhesive and self-repairing ion-conductive elastomer prepared by the method of example 3 shows that the maximum deformation is about 200% and the maximum stress is 0.12MPa, indicating that the elastic body has excellent mechanical strength and stretchability.
Example four
An underwater self-adhesive and self-repairing transparent ion-conductive elastomer and a synthetic method thereof comprise the following steps:
step S1: weighing 3.31g of tetraethylammonium chloride and 2.34g of lidocaine with the molar ratio of 2 to 1, stirring at 90 ℃ until the mixture is clear and transparent, taking out and cooling to room temperature to complete the preparation of the hydrophobic eutectic solvent;
step S2: adding 3.84g of 2-phenoxyethyl acrylate and 4.17g of isobornyl acrylate to the hydrophobic eutectic solvent prepared in the step S1, and uniformly mixing to prepare a polymerizable hydrophobic eutectic solvent;
and step S3: adding 0.2g of an acylphosphine oxide photoinitiator to the solution prepared in step S2, and uniformly mixing to prepare a prepolymer solution;
and step S4: and (4) putting the prepolymer solution prepared in the step (S3) between glass plates with the surfaces covered by release films, and then putting the glass plates under an ultraviolet lamp of 2kW for irradiating for 5min to finally prepare the transparent ion conductive elastomer capable of self-adhering and self-repairing underwater.
Verification results for example four:
(1) The results regarding environmental friendliness, underwater adhesion performance, underwater self-repair performance, and underwater electrical self-repair performance are similar to the examples, with specific reference to fig. 1-5.
In addition, as shown in fig. 10, the overall adhesion strength is about 20kPa for the lap-shear test of the transparent ion-conducting elastomer capable of self-adhesion and self-repair under water prepared by the method of example 4, indicating good adhesion performance.
(2) Good optical properties with respect to material transparency
As shown in fig. 6, the average optical transmittance of the transparent underwater self-adhesive and self-repairing ion-conductive elastomer prepared by the method of example 4 is about 83%, which indicates its excellent optical transparency.
(3) Good mechanical property
As shown in FIG. 7, the maximum strain of the transparent underwater self-adhesive and self-repairing ion-conductive elastomer prepared by the method of example 4 is about-150%, and the maximum stress is about-0.1 MPa, which indicates its excellent mechanical strength and stretchability.
EXAMPLE five
An underwater self-adhesive and self-repairing transparent ion-conductive elastomer and a synthetic method thereof comprise the following steps:
step S1: weighing 4.48g of benzethonium chloride and 2.06g of ibuprofen, wherein the molar ratio of the benzethonium chloride to the ibuprofen is 1, stirring at 80 ℃ until the benzethonium chloride and the ibuprofen are clear and transparent, taking out the benzethonium chloride and the ibuprofen and cooling to room temperature to complete preparation of the hydrophobic eutectic solvent;
step S2: adding 3.84g of 2-phenoxyethyl acrylate and 4.17g of isobornyl acrylate to the hydrophobic eutectic solvent prepared in the step S1, and uniformly mixing to prepare a polymerizable hydrophobic eutectic solvent;
and step S3: adding 0.2g of organic peroxide initiator into the solution prepared in the step S2, and uniformly mixing to prepare a prepolymer solution;
and step S4: and (4) placing the prepolymer solution prepared in the step (S3) between glass plates with surfaces covered by release films at the upper and lower parts, and then placing the glass plates under an ultraviolet lamp of 2kW for irradiating for 5min to finally prepare the transparent ion conductive elastomer capable of self-adhering and self-repairing under water.
Verification results for example four:
(1) The results regarding environmental friendliness, underwater adhesion performance, underwater self-repair performance, and underwater electrical self-repair performance are similar to the examples, with specific reference to fig. 1-5.
In addition, as shown in fig. 10, the overall adhesion strength is about 20kPa for the lap-shear test of the transparent ion-conducting elastomer capable of self-adhesion and self-repair under water prepared by the method of example 4, indicating good adhesion performance.
(2) Good optical properties with respect to material transparency
As shown in fig. 6, the transparent ion conductive elastomer capable of self-adhesion and self-repair under water prepared by the method of example 5 has a visible light transmittance curve, an average optical transmittance of about 58% and shows a certain optical transparency.
(3) Good mechanical property and adhesion property
As shown in FIG. 7, the stress-strain curve of the transparent ion-conducting elastomer capable of self-adhesion and self-repair under water prepared by the method of example 5 shows a maximum deformation of about 90% and a maximum stress of about 0.08MPa, and shows good mechanical strength and stretchability.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A method for synthesizing an underwater self-adhesive self-repairing transparent ion-conductive elastomer is characterized by comprising the following steps:
step S1: weighing long-chain quaternary ammonium salt and a hydrogen bond donor according to a molar ratio of 2;
step S2: adding a hydrophobic soft monomer and a hydrophobic hard monomer into the hydrophobic eutectic solvent, and uniformly mixing to obtain a polymerizable hydrophobic eutectic solvent;
and step S3: adding an initiator into the polymerizable hydrophobic eutectic solvent, and uniformly mixing to obtain a prepolymer solution;
and step S4: and (3) carrying out ultraviolet light irradiation or thermal initiation polymerization reaction on the prepolymer solution to prepare the underwater self-adhesive and self-repairing transparent ion-conductive elastomer.
2. The method for synthesizing the transparent self-adhesive and self-repairing underwater ion-conductive elastomer as claimed in claim 1, wherein in the step S1, the long-chain quaternary ammonium salt is one or more of triethylbenzylammonium chloride, tetraethylammonium chloride and benzethonium chloride.
3. The method for synthesizing the transparent self-adhesive and self-repairing underwater ion-conducting elastomer as claimed in claim 1 or 2, wherein in the step S1, one or more of thymol, lidocaine and ibuprofen is adopted as a hydrogen bond donor.
4. The method for synthesizing the transparent self-adhesive and self-repairing underwater ion-conducting elastomer as claimed in claim 3, wherein in the step S2, the hydrophobic soft monomer adopts 2-phenoxyethyl acrylate, and the hydrophobic hard monomer adopts isobornyl acrylate.
5. The method for synthesizing the self-adhesive self-repairing transparent ionic conductive elastomer under water according to the claim 4, wherein in the step S2, the molar ratio of the hydrophobic soft monomer to the hydrophobic hard monomer is 3.
6. The method for synthesizing the transparent self-adhesive and self-repairing underwater ion-conducting elastomer as claimed in claim 5, wherein in the step S3, an initiator or a thermal initiator is adopted as the initiator.
7. The method for synthesizing the transparent ion-conducting elastomer capable of realizing underwater self-adhesion and self-repair as claimed in claim 6, wherein the photoinitiator is at least one of benzoin and derivative photoinitiators, benzil photoinitiators, alkylbenzene ketone photoinitiators and acylphosphorus oxide photoinitiators.
8. The method for synthesizing the transparent self-adhesive and self-repairing underwater ion-conductive elastomer as claimed in claim 6, wherein the thermal initiator is an organic peroxide initiator or an azo initiator.
9. An underwater self-adhesive and self-repairing transparent ion-conductive elastomer, which is prepared by the synthesis method of any one of claims 1 to 9.
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