A combined experimental and molecular dynamics simulation study of an intrinsic self-healing polyurethane elastomer based on a dynamic non-covalent mechanism

Luo, Yanlong; Chen, Xianling; Chen, Jialiang; Wu, Zhipeng; Ma, Hongming; Liu, Xuejing; Xiang, Bo; Ma, Xiaofeng; Luo, Zhenyang

doi:10.1039/d0sm02085k

Cited by 18 publications

(14 citation statements)

References 51 publications

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“…PSiUr3 and PSiUr4 show two peaks of the amino group within 3500 to 3300 cm −1 , that is due to the crystallization effect which is further clarified by X‐rays data (XRD) in Figure 3f. [ 43,44,45 ] It can be seen in Figure 3f that the crystallization degree of all PSiUr samples is very different. The crystallization is mainly caused by the conjugation of the benzene ring on the diaminodiphenyl disulfide.…”

Section: Resultsmentioning

confidence: 99%

Novel Intrinsic Self‐Healing Poly‐Silicone‐Urea with Super‐Low Ice Adhesion Strength

Chen

Luo

et al. 2022

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Accumulation of snow and ice often causes problems and even dangerous situations for both industry and the general population. Passive de‐icing technologies, e.g., hydrophobic, liquid‐infused bionic surfaces, have attracted more and more attention compared with active de‐icing technologies, e.g., electric heating, hot air heating, due to the passive de‐icing technology's lower energy consumption and sustainability footprint. Using passive de‐icing coatings seems to be one of the most promising solutions. However, the previously reported de‐icing coatings suffer from high ice adhesion strength or short service life caused by wear. An intrinsic self‐healing material based on poly‐silicone‐urea is developed in this work to address these problems. The material is prepared by introducing dynamic disulfide bonds into the hard phase of the polymer. Experimental results indicate that this poly‐silicone‐urea has a self‐healing efficiency of close to 99%. More interestingly, it is found that the coating prepared from this poly‐silicone‐urea has a super low ice adhesion force, only 7 ± 1 kPa, which is almost the lowest value compared with previous intrinsic self‐healing de‐/anti‐icing reports. This material can maintain low ice adhesion strength after healing. This intrinsic self‐healing poly‐silicone‐urea can meet several practical applications, opening the door for future sustainable anti‐/de‐icing technologies.

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Section: Resultsmentioning

confidence: 99%

Novel Intrinsic Self‐Healing Poly‐Silicone‐Urea with Super‐Low Ice Adhesion Strength

Chen

Luo

et al. 2022

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“…In separate studies on urea‐formaldehyde polymers and polyurethane, an increase in temperature results in a decrease in OO pairs attributed to hydrogen bonding and an increase in van der Waals forces, leading to lower self‐healing efficiencies at higher temperatures. [ 134–136 ] The crosslinking between hydrogen bonds and van der Waal forces is the driving force behind the self‐healing mechanisms yet MD also confirmed that an increase in cross‐linking density results in a decrease of density in hydrogen bonding also leading to lower self‐healing efficiencies. [ 135 ]…”

Section: Modeling and Simulation Of Self‐healable Polymersmentioning

confidence: 99%

An Overview of Self‐Healable Polymers and Recent Advances in the Field

Choufi

Mustapha

Tehrani‐Bagha

et al. 2022

Macromol. Rapid Commun.

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The search for materials with better performance, longer service life, lower environmental impact, and lower overall cost is at the forefront of polymer science and material engineering. This has led to the development of self‐healing polymers with a range of healing mechanisms including capsular‐based, vascular, and intrinsic self‐healing polymers. The development of self‐healable systems has been inspired by the healing of biological systems such as skin wound healing and broken bone reconstruction. The goal of using self‐healing polymers in various applications is to extend the service life of polymers without the need for replacement or human intervention especially in restricted access areas such as underwater/underground piping where inspection, intervention, and maintenance are very difficult. Through an industrial and scholarly lens, this paper provides: a) an overview of self‐healing polymers; b) classification of different self‐healing polymers and polymer‐based composites; c) mechanical, thermal, and electrical analysis characterization; d) applications in coating, composites, and electronics; e) modeling and simulation; and f) recent development in the past 20 years. This review highlights the importance of healable polymers for an economically and environmentally sustainable future, the most recent advances in the field, and current limitations in fabrication, manufacturing, and performance.

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“…It is thus clear that the selfhealing properties of HSPU films are the result of the combined action of the UPy groups and the aromatic disulfide bonding. 46,47 The dynamic reversibility of UPy and aromatic disulfide bonding interactions allow the HSPU to be self-healed and recycled. To examine the reprocessability of the HSPU-9 film, the film was cut into millimeter-sized fragments and then sandwiched between two Teflon sheets.…”

Section: Polymer Chemistry Papermentioning

confidence: 99%

A wear-resistant, self-healing and recyclable multifunctional waterborne polyurethane coating with mechanical tunability based on hydrogen bonding and an aromatic disulfide structure

et al. 2022

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A combined experimental and molecular dynamics simulation study of an intrinsic self-healing polyurethane elastomer based on a dynamic non-covalent mechanism

Abstract: The number, type, strength, lifetime, and the exchange of hydrogen bonds in the self-healing process at different temperatures were investigated by molecular dynamics simulation using a micro-crack model.

Cited by 18 publications

References 51 publications

Novel Intrinsic Self‐Healing Poly‐Silicone‐Urea with Super‐Low Ice Adhesion Strength

Novel Intrinsic Self‐Healing Poly‐Silicone‐Urea with Super‐Low Ice Adhesion Strength

An Overview of Self‐Healable Polymers and Recent Advances in the Field

A wear-resistant, self-healing and recyclable multifunctional waterborne polyurethane coating with mechanical tunability based on hydrogen bonding and an aromatic disulfide structure

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