Robust Natural Polyphenolic Adhesives against Various Harsh Environments

Abstract

Although adhesive hydrogels have been extensively explored, the development of adhesives with long-term strong adhesion capacity under various harsh environments is still met with profound challenges such as sophisticated preparation, long-term curing, and low bonding strength. Herein, a series of robust adhesive hydrogels have been developed via the polyphenol-epoxy-cross-linking (PEC) reactions between natural polyphenols (extracts) and epoxy glycidyl ethers. The as-prepared natural polyphenolic adhesive hydrogels could induce strong adhesion onto several kinds of typical substrates (i.e., wood, glass, paper, PET, PMMA, and Fe) under both dry and wet conditions based on multi-interactions. Moreover, those natural polyphenolic adhesives exhibited good low-temperature and solvent resistance performances, which could be widely used in different kinds of device repairment (i.e., chemical, petroleum, wood, metal, glass, plastic, rubber, and other industries) under different conditions. This work could provide new opportunities toward natural-inspired robust adhesives in various fields ranging from chemical transportation, industrial manufacturing, architectural design, and marine engineering to daily life.

Solvent-Resistant Adhesive Gel with Thermal Post-Tunability

“…Notably, only few hydrogels can achieve adhesion in various water, oil, and organic solvents. The comparison of the main properties of the PPI 0.1 -BA 1 -6 h organogel with other recently reported hydrogel adhesives is presented in Figure h, which shows that the PPI 0.1 -BA 1 -6 h organogel had good adhesion properties not only in water but also in various solvents. ,,,− …”

Upcycling Waste Thermosetting Polyimide Resins into High‐Performance and Sustainable Low‐Temperature‐Resistance Adhesives

“…Furthermore, compared with the previously reported supramolecular adhesives, this waste-based adhesive behaves stability multireusability, excellent adhesion at both ambient and ultralow temperature(Figure 4h and Table S2, Supporting Information). [20,21,[23][24][25][26][27][28][29][30][31][32][33] Additionally, the preparation of the adhesive is eco-friendly, dispensing with complicated synthesis and separation processes.…”

Robust and multifunctional natural polyphenolic composites for water remediation

“…They also showed high affinity to some specific surfaces containing amine and/or thiol groups (e.g., tissue surface proteins) via Michael addition and/or Schiff base reactions. 43 Therefore, they can be employed as functional coatings with outstanding adhesion ability for a variety of surfaces with different shapes. For example, our group recently designed two types of coatings via a one-pot integration of protocatechualdehyde (PA) and aminoglycosides, as well as the layer-bylayer assembly of 5,6-dihydroxyindole and aminoglycosides, respectively.…”