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

Abstract

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.

Ethanol-assisted room-temperature rapid self-healing polydimethylsiloxane-polyurea/carbon composite elastomers for energy harvesters and smart sensors

“…4a, the hydrogen bonding interactions in the range of 25–150 °C are recorded by in situ FTIR spectroscopy. Similar to that reported in the literature, 55 the CO stretching vibration peak for hydrogen bonding is located at 1634 cm −1 , while the free CO peak appears at 1650 cm −1 . As shown in Fig.…”

Self‐Healable Triboelectric Nanogenerators: Marriage between Self‐Healing Polymer Chemistry and Triboelectric Devices

“…Among them, dynamic noncovalent bonds include hydrogen bonds interactions, [82,83] π-π stacking, [84][85][86] metal-ligand interactions, [87,88] ionic interactions, [89,90] and host-guest interactions. [91,92] Dynamic covalent bonds include thermally reversible Diels-Alder reactions, [48,93] dynamic urea bonds, [94,95] dynamic disulfide bonds, [96,97] borate ester bonds, [98,99] dynamic imine bonds [49,100] and so on. When a material is damaged, the reversible forces within the material could open spontaneously or be under external stimulation to heal the damaged and finally recover the structure and properties of the material.…”

An Extreme‐Environment‐Resistant Self‐Healing Anti‐Icing Coating

“…According to the material types of anti-icing coatings, the primary properties of recently-reported self-healing anti-icing coatings are summarized in Figure 6. [19,20,[46][47][48][49][50][51][52][53][54][55][56][57][58][59][60] Most coatings possess excellent anti-icing performance but without self-healing capability. Although there are a few reports of self-healing anti-icing coatings, they commonly require an external stimulus (e.g., thermal energy) to achieve self-healing, and none of them is able to heal under various extreme environments.…”