Fast-Curing Mussel-Inspired Adhesive Derived from Vegetable Oil

Abstract

The development of functional materials based on renewable resources is of great significance in today’s resource shortage. Here, we present an effective way to synthesize a mussel-inspired adhesive from acrylated epoxidized soybean oil (AESO), a renewable and commercially available small molecular material with a molecular weight around 1200 Da, by a one-step esterification reaction with the affordable 3,4-dihydroxybenzoic acid (DHA). By taking advantages of both the double bond and the catechol moiety presented in this small molecular adhesive, a short curing time was achieved with UV irradiation. An average bonding strength around 1.4 MPa at a curing time of only around 10 min on a glass substrate was observed, which reached 3.1 MPa (average 2.8 MPa) at a curing time of 2 h under ambient conditions. The curing time is much shorter, and the bonding strength is obviously stronger than the conditions where conventional oxidation agents such as IO4 – or oxidation/coordination agents such as Fe3+ are used as the curing agent. Furthermore, the AESO-g-DHA can be used as an underwater adhesive, and an appreciable bonding strength up to 0.64 MPa was observed, which is superior than most of currently known commercialized glues. Given that the adhesive could be synthesized from low-cost renewable resources in one step, it might be a potential candidate for large-scale practical application.

Instant and Strong Underwater Adhesion by Coupling Hygroscopicity and In Situ Photocuring

“…We summarized in Table S1 various curing methods employed for previous underwater adhesives. 24,25,36,37,[40][41][42][43][44][45][51][52][53][54][55][56][57][58][59][60][61][62][63] commonly involved to construct cross-linking via catechol oxidation for the enhancement of bulk cohesion and hence adhesion. This oxidative curing, however, is normally slow (several hours 40,41,52 or days 25,42 ) and requires the adhesive and oxidant to be sequentially applied to the target surface before curing, making the bonding process less efficient and user-friendly.…”

Bio-based and bio-inspired adhesives from animals and plants for biomedical applications

“…However, such an approach is not necessarily straightforward as one (or several) of the components may interfere with the function of others. To illustrate this problem, we mention an example from the literature where the goal was to obtain a strong network by combining chelate-based and UV-based cross-linking strategies into the same material [ 271 ]. Here, an acrylated epoxidized soybean oil (AESO) was employed, which combines UV-activatable residues and DOPA groups.…”

Biocompatible Catechol‐Functionalized Cellulose‐Based Adhesives with Strong Water Resistance

“…[29] This intriguing biological material prompts to pursue advanced multi-functional adhesive materials. [9,[30][31][32][33][34][35][36][37][38][39] Due to the high availability, biocompatibility, and good mechanical properties, [40,41] cellulose and cellulose derivatives have been widely used in various fields such as hydrogels, paper, aerogel, membranes, medicines, sorption agents, and coatings. [42][43][44][45][46][47][48][49][50] The hydroxyl groups on anhydroglucose units make cellulose suitable for a variety of physical or chemical modifications.…”

“…[ 29 ] This intriguing biological material prompts to pursue advanced multi‐functional adhesive materials. [ 9,30–39 ]…”