Tough and Degradable Self-Healing Elastomer from Synergistic Soft–Hard Segments Design for Biomechano-Robust Artificial Skin

ACS Nano ◽  
2021 ◽  
Author(s):  
Xiaochen Xun ◽  
Xuan Zhao ◽  
Qi Li ◽  
Bin Zhao ◽  
Tian Ouyang ◽  
...  
Keyword(s):  
Artificial Skin ◽  
Self Healing ◽  
Hard Segments

Polypyrrole-Doped Conductive Self-healing Multifunctional Composite Hydrogels with Dual Cross-Linked network

Soft Matter ◽  
2021 ◽  
Author(s):  
Xuemiao Wang ◽  
Xin Li ◽  
Lingling Zhao ◽  
Meng Li ◽  
Yan Li ◽  
...  
Keyword(s):  
High Conductivity ◽  
Artificial Skin ◽  
Self Healing ◽  
Wearable Electronics ◽  
Practical Application ◽  
Soft Robots ◽  
Composite Hydrogels

Soft hydrogel materials could be applied for biosensors, wearable electronics, artificial skin, soft robots, and so on. Practical application requires the materials to have various properties such as high conductivity,...

scholarly journals Shape Memory Polyurethane and its Composites for Various Applications

2019 ◽  
Vol 9 (21) ◽  
pp. 4694 ◽  
Author(s):  
Arvind Gupta ◽  
Anoth Maharjan ◽  
Beom Soo Kim
Keyword(s):  
Tissue Engineering ◽  
Literature Review ◽  
Shape Memory ◽  
Electromagnetic Interference ◽  
Unique Property ◽  
Potential Candidate ◽  
Self Healing ◽  
Intrinsic Shape ◽  
Hard Segments ◽  
Shape Memory Polyurethane

The inherent capability to deform and reform in a predefined environment is a unique property existing in shape memory polyurethane. The intrinsic shape memory ability of the polyurethane is due to the presence of macro domains of soft and hard segments in its bulk, which make this material a potential candidate for several applications. This review is focused on manifesting the applicability of shape memory polyurethane and its composites/blends in various domains, especially to human health such as shielding of electromagnetic interference, medical bandage development, bone tissue engineering, self-healing, implants development, etc. A coherent literature review highlighting the prospects of shape memory polyurethane in versatile applications has been presented.

scholarly journals Mechano-responsive hydrogen-bonding array of thermoplastic polyurethane elastomer captures both strength and self-healing

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Youngho Eom ◽  
Seon-Mi Kim ◽  
Minkyung Lee ◽  
Hyeonyeol Jeon ◽  
Jaeduk Park ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Thermoplastic Polyurethane ◽  
Healing Process ◽  
Polyurethane Elastomer ◽  
Self Healing ◽  
Static Mode ◽  
Soft Segments ◽  
Hard Segments ◽  
Thermoplastic Polyurethane Elastomer ◽  
Dynamic Exchange

AbstractSelf-repairable materials strive to emulate curable and resilient biological tissue; however, their performance is currently insufficient for commercialization purposes because mending and toughening are mutually exclusive. Herein, we report a carbonate-type thermoplastic polyurethane elastomer that self-heals at 35 °C and exhibits a tensile strength of 43 MPa; this elastomer is as strong as the soles used in footwear. Distinctively, it has abundant carbonyl groups in soft-segments and is fully amorphous with negligible phase separation due to poor hard-segment stacking. It operates in dual mechano-responsive mode through a reversible disorder-to-order transition of its hydrogen-bonding array; it heals when static and toughens when dynamic. In static mode, non-crystalline hard segments promote the dynamic exchange of disordered carbonyl hydrogen-bonds for self-healing. The amorphous phase forms stiff crystals when stretched through a transition that orders inter-chain hydrogen bonding. The phase and strain fully return to the pre-stressed state after release to repeat the healing process.

scholarly journals A novel kind of room temperature self-healing poly(urethane-urea) with robust mechanical strength based on aromatic disulfide

2021 ◽  
Vol 28 (4) ◽  
Author(s):  
Jin He ◽  
Fangfang Song ◽  
Xiong Li ◽  
Liyi Chen ◽  
Xingyu Gong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Strength ◽  
Room Temperature ◽  
Toluene Diisocyanate ◽  
Self Healing ◽  
Isophorone Diisocyanate ◽  
Elongation At Break ◽  
Strength Based ◽  
Hard Segments ◽  
Poly Propylene

AbstractAn innovative poly(urethane-urea) elastomer, which exhibited excellent stretchability, thermal stability and autonomous self-healing abilities, was synthesized from the commercially available poly(propylene glycol) (PPG), isophorone diisocyanate (IPDI), 2,4 / 2,6-toluene diisocyanate (80: 20, w / w) (TDI-80) and bis (2-aminophenyl) disulfide (DSDA). This aromatic disulfide containing poly(urethane-urea) (ss-PUs) achieved both rapid room temperature self-healing abilities and robust mechanical strength (the ultimate tensile strength was up to 4.20 ± 0.10 MPa and elongation at break was up to 954 ± 35.6%), through facile metathesis of the aromatic disulfides which embedded in hard segments. After the ss-PUs was cut into two-halves and reconnected, the mechanical properties could recover to ~ 90% of those of the original samples within 12 h at room temperature without extra self-healing agents or any change of environmental conditions.

scholarly journals A strong and stretchable self-healing film with self-activated pressure sensitivity for potential artificial skin applications

2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Chengyi Hou ◽  
Tao Huang ◽  
Hongzhi Wang ◽  
Hao Yu ◽  
Qinghong Zhang ◽  
...  
Keyword(s):  
Artificial Skin ◽  
Self Healing ◽  
Pressure Sensitivity

scholarly journals Effects of Diisocyanate Structure and Disulfide Chain Extender on Hard Segmental Packing and Self-Healing Property of Polyurea Elastomers

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 838 ◽  
Author(s):  
Ting Li ◽  
Tianze Zheng ◽  
Jiarui Han ◽  
Zhanli Liu ◽  
Zhao-Xia Guo ◽  
...  
Keyword(s):  
Disulfide Bonds ◽  
Aliphatic Amine ◽  
Chain Extender ◽  
Hexamethylene Diisocyanate ◽  
Self Healing ◽  
Segmental Dynamics ◽  
Chain Mobility ◽  
Healing Property ◽  
Chain Extenders ◽  
Hard Segments

Four linear polyurea elastomers synthesized from two different diisocyanates, two different chain extenders and a common aliphatic amine-terminated polyether were used as models to investigate the effects of both diisocyanate structure and aromatic disulfide chain extender on hard segmental packing and self-healing ability. Both direct investigation on hard segments and indirect investigation on chain mobility and soft segmental dynamics were carried out to compare the levels of hard segmental packing, leading to agreed conclusions that correlated well with the self-healing abilities of the polyureas. Both diisocyanate structure and disulfide bonds had significant effects on hard segmental packing and self-healing property. Diisocyanate structure had more pronounced effect than disulfide bonds. Bulky alicyclic isophorone diisocyanate (IPDI) resulted in looser hard segmental packing than linear aliphatic hexamethylene diisocyanate (HDI), whereas a disulfide chain extender also promoted self-healing ability through loosening of hard segmental packing compared to its C-C counterpart. The polyurea synthesized from IPDI and the disulfide chain extender exhibited the best self-healing ability among the four polyureas because it had the highest chain mobility ascribed to the loosest hard segmental packing. Therefore, a combination of bulky alicyclic diisocyanate and disulfide chain extender is recommended for the design of self-healing polyurea elastomers.

scholarly journals Mechano-responsive hydrogen-bonding array of thermoplastic polyurethane elastomer captures both strength and self-healing

2020 ◽  
Author(s):  
Youngho Eom ◽  
Seon-Mi Kim ◽  
Minkyung Lee ◽  
Hyeonyeol Jeon ◽  
Sung Yeon Hwang ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Thermoplastic Polyurethane ◽  
Healing Process ◽  
Polyurethane Elastomer ◽  
Self Healing ◽  
Static Mode ◽  
Soft Segments ◽  
Hard Segments ◽  
Thermoplastic Polyurethane Elastomer ◽  
Dynamic Exchange

Abstract Self-repairable materials strive to emulate curable and resilient biological tissue; however, their performance is currently insufficient for commercialization purposes because mending and toughening are mutually exclusive. Here, we report a carbonate-type thermoplastic polyurethane elastomer that self-heals at 35 °C and is as strong as footwear elastomers. This elastomer exhibits the highest tensile strength to date (43 MPa). Distinctively, it has abundant carbonyl groups in soft-segments and is fully amorphous with negligible phase separation due to poor hard-segment stacking. It operates in dual mechano-responsive mode through a reversible disorder-to-order transition of its hydrogen-bonding array; it heals when static and toughens when dynamic. In static mode, non-crystalline hard segments promote dynamic exchange of disordered carbonyl hydrogen-bonds for self-healing. The amorphous phase forms stiff crystals when stretched through a transition that orders inter-chain hydrogen bonding. The phase and strain fully return to the pre-stressed state after release to repeat healing process.

3D Antidrying Antifreezing Artificial Skin Device with Self‐Healing and Touch Sensing Capability

2021 ◽  
pp. 2100011
Author(s):  
Woohyeon Shin ◽  
Jun Seop Kim ◽  
Hui Ju Choi ◽  
Heesung Kim ◽  
Sulbin Park ◽  
...  
Keyword(s):  
Artificial Skin ◽  
Self Healing

Autonomous self-healing polyisoprene elastomers with high modulus and good toughness based on the synergy of dynamic ionic crosslinks and highly disordered crystals

2020 ◽  
Vol 11 (41) ◽  
pp. 6549-6558
Author(s):  
Yohei Miwa ◽  
Mayu Yamada ◽  
Yu Shinke ◽  
Shoichi Kutsumizu
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Self Healing ◽  
High Modulus ◽  
Disordered Crystals ◽  
Ionic Crosslinks

We designed a novel polyisoprene elastomer with high mechanical properties and autonomous self-healing capability at room temperature facilitated by the coexistence of dynamic ionic crosslinks and crystalline components that slowly reassembled.

Congenital self-healing histiocytosis

1982 ◽  
Vol 118 (4) ◽  
pp. 267-272 ◽  
Author(s):  
E. Bonifazi
Keyword(s):  
Self Healing
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