Bonding method for hydrogel and elastomer, and product and application thereof

Abstract

The invention provides a bonding method for hydrogel and elastomer, and a product and application thereof. The bonding method comprises the following steps: (1) coating: coating the surface of a molded hydrogel material with a hydrogel primer coating solution to obtain a hydrogel material with a primer coating, and coating the surface of the molded elastomer with the elastomer primer coating solution to obtain elastomer with a primer coating; and (2) bonding: bonding the hydrogel material with the primer coating obtained in the step (1) with the elastomer with the primer coating to finish bonding of the hydrogel and the elastomer. According to the preparation method, the surfaces of the molded hydrogel and the molded elastomer are coated with the primer coating, and a coating formed between the hydrogel and the elastomer can form a large number of stable and firm covalent bonds between the hydrogel and the elastomer material, so the debonding phenomenon of the whole device in the process of deformation is effectively avoided.

Description

technical field [0001] The invention relates to the field of preparation of flexible materials, in particular to a bonding method of hydrogel and elastomer as well as its products and applications. Background technique [0002] As a typical flexible material, hydrogel has a series of significant advantages such as high transparency, high stretchability, strong compliance, good biocompatibility and rich functionality, and has been widely used in wound dressings, Drug sustained release and food processing and other application levels. In recent years, with the rapid growth of demand for smart wearable devices, flexible materials and devices have gradually become the research hotspots of scholars and industry. Among them, a new type of flexible devices composed of hydrogel and other soft materials— Hydrogel ionization devices, relying on the incomparable advantages of traditional electronic devices, are gradually approaching the field of vision of researchers. The normal oper...

AI Technical Summary

Problems solved by technology

For the first time, Yuk et al. realized the in-situ bonding of high-toughness hydrogels to the surface of non-porous hard materials and elastomeric materials (Nature materials, 15(2): 190, Nature communications, 7: 12028), but this original The in-situ bonding method requires the in-situ polymerization of the monomer materials constituting the hydrogel on the surface of the target material, which is not suitable for the formed hydrogel material; at the same time, the surface of the material needs to be activated by silane or benzophenone before it can pass through The way of polymerization forms bonding, which increases the technical difficulty

Wirthl et al achieved instant bonding between hydrogels and elastomers by using fast-reacting cyanoacrylate glue (Science Advances, 3(6):e1700053), which requires a suitable solvent for the glue Able to penetrate into both materials, different solvents are required for different materials, which obviously limits the generality of the method

Liu et al. used the chemical mechanism of silane coupling agents to modify the hydrogel and elastomer as a whole, and then bonded the two polymerized networks together to form a stable interfacial covalent bond at the interface to achieve adhesion. (Nature communications,9(1):846), but this method will affect the mechanical properties of the material itself, thereby reducing the properties of the overall device

[0004] CN109868097A discloses a binder and a bonding method for bonding hydrogel and various materials, specifically, the binder formed by dispersing nanoparticles in a solvent is applied to the surface of a solid material to be bonded, and the The surface to be bonded of the hydrogel material is in contact with the binder, and the hydrogel material is bonded to the solid material as a whole, but this method requires the use of nanoparticles, and the bonding achieved at the same time is mainly through physical interaction, and there is no chemical bond , there is a problem with its long-term stability, and the hydrogel material is easy to fall off from the solid material after long-term use

[0005] Therefore, achieving high-toughness bonding of dissimilar materials that have been formed remains a formidable challenge

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