Preparation and Properties of Self-healing Triboelectric Nanogenerator Based on Waterborne Polyurethane Containing Diels–Alder Bonds

Recent advances in self-healing polyurethane based on dynamic covalent bonds combined with other self-healing methods

“…Improving the self-healing efficiency while possessing a high modulus and toughness and mild healing conditions is the current research hotspot of self-healing PU based on the DA reaction and other methods. 35 The imine bond, also known as a Schiff base, generally refers to the R 2 C = NR′ (R′ ≠ H) structure, which is obtained by the reaction of aldehydes (or ketones) with primary amines. 36 The synthesis mechanism is that the nitrogen atom with lone pair electrons in the amine compound acts as a nucleophilic reagent to attack the carbon atom of the carbonyl group and dehydrate to form the corresponding imine bond.…”

“…Improving the self-healing efficiency while possessing a high modulus and toughness and mild healing conditions is the current research hotspot of self-healing PU based on the DA reaction and other methods. 35…”

Robust and durable triboelectric nanogenerators enabled by a mechanically strong and mildly healable polymer

“…[14][15][16] However, there is a tradeoff between mechanical strength and healability for most healable polymers, which creates challenges for their utilization in TENGs. [17][18][19][20][21][22][23] For instance, autonomous-healable polymers with high molecular chain mobility can heal without an external trigger. But they usually present relatively low mechanical strength, which cannot withstand the high mechanical loading applied on TENGs.…”

“…But their healing may require sophisticated conditions, such as high temperature, infrared radiation, or other stimuli that are not compatible with the device system. 15,19,30,31 In this regard, simplicity of the healing process aligned with the normal operating conditions of TENGs becomes essential. Despite extensive efforts, technological approaches that can achieve these attributes remain limited.…”

Preparation of Bio-Based Foams with a Uniform Pore Structure by Nanocellulose/Nisin/Waterborne-Polyurethane-Stabilized Pickering Emulsion

“…Polyurethane (PU) is a copolymer containing repeated urethane groups composed of soft and hard chain segments. It has excellent mechanical properties, good compatibility and is easy to modify [ 25 , 26 ]. However, traditional PU could release a large amount of volatile organic compounds during its application.…”