Debonding-on-demand adhesives based on photo-reversible cycloaddition reactions

Abstract

Debonding-on-demand (DoD) adhesives, which have the ability to repeatedly adhere and release in response to external stimuli, are attracting attention as sustainable functional materials. DoD adhesives can be designed by...

Functional design of stimuli-responsive poly(phthalaldehyde)-based adhesives: depolymerization kinetics and mechanical strength management through plasticizer addition

“…While most rigid substrates are compatible with lap shear testing, glass substrates were selected because glass microscope slides are readily available, do not require further preparation, and their transparency allows visualization of the bonded sample and the calculation of the adhesive area prior to testing. [51][52][53][54][55] Moreover, polymer chains tend to be more rigid in a solvent that poorly dissolves them (e.g., methanol or acetone) compared to a good dissolving solvent (e.g., dichloromethane (DCM)). Thus, the polymer may not be as free to favorably interact with the neighboring functionalities of the substrate in the case of the former.…”

Designed to Degrade: Tailoring Polyesters for Circularity

“…227,228 The utilization of photoreversible bonds instead of thermoreversible bonds offers advantages in terms of energy efficiency, targetability as well as wider useable temperature range. 229 There is still limited work on combining polyester-based adhesives with photoreversibility. However, end-functionalization of epoxidized soybean oil (ESO) with coumarin units lead to self-healable and thermally stable adhesives.…”

“…Photoreversible groups have also been implemented to develop reusable and self-healing thermosetting adhesives. , The utilization of photoreversible bonds instead of thermoreversible bonds offers advantages in terms of energy efficiency, targetability as well as wider useable temperature range . There is still limited work on combining polyester-based adhesives with photoreversibility.…”