Highly efficient self-healing materials with excellent shape memory and unprecedented mechanical properties

2020 ◽  
Vol 8 (32) ◽  
pp. 16203-16211 ◽  
Author(s):  
Chaoxian Chen ◽  
Siwen Chen ◽  
Zhihao Guo ◽  
Wanruo Hu ◽  
Zhangpei Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wound Healing ◽  
Shape Memory ◽  
Self Healing ◽  
Highly Efficient ◽  
Shape Memory Properties ◽  
Body Sensors

Novel dual-physical cross-linked elastomers with unprecedented mechanical, highly efficient self-healing, and excellent shape memory properties are designed, which will offer new guild for future body-sensors, stimulating reactive and wound healing.

Hierarchically reversible crosslinking polymeric hydrogels with highly efficient self-healing, robust mechanical properties, and double-driven shape memory behavior

2021 ◽  
Author(s):  
Shishan Xue ◽  
Yuanpeng Wu ◽  
Guanfei Liu ◽  
Meiling Guo ◽  
Yuhan Liu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Self Healing ◽  
Shape Memory Behavior ◽  
Highly Efficient ◽  
Polymeric Hydrogels

A hierarchically reversible crosslinked hydrogel has been designed with excellent mechanical properties, efficient self-healability and double-driven shape memory effect (pH, Ca2+). A soft catcher actuator was constructed, which could catch a plastic fish in Ca2+ solution.

The preparation of hydrogels with highly efficient self-healing and excellent mechanical properties

2021 ◽  
Vol 329 ◽  
pp. 115581
Author(s):  
Chaoxian Chen ◽  
Zhongcun Li ◽  
Siwen Chen ◽  
Lingzhi Kong ◽  
Zhihao Guo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Self Healing ◽  
Highly Efficient

Catalyst-free self-healing fully bio-based vitrimers derived from tung oil: Strong mechanical properties, shape memory, and recyclability

2021 ◽  
Vol 171 ◽  
pp. 113978
Author(s):  
Ya-zhou Xu ◽  
Pan Fu ◽  
Song-lin Dai ◽  
Hai-bo Zhang ◽  
Liang-wu Bi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Self Healing ◽  
Tung Oil ◽  
Catalyst Free

scholarly journals Shape Memory Behavior of Carbon Black-reinforced Trans-1,4-polyisoprene and Low-density Polyethylene Composites

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 807 ◽  
Author(s):  
Lin Xia ◽  
Han Gao ◽  
Weina Bi ◽  
Wenxin Fu ◽  
Guixue Qiu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Shape Memory ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Shape Memory Behavior ◽  
Blending Method ◽  
Shape Memory Properties ◽  
Shape Memory Composites ◽  
Properties Of Composites

Shape memory composites of trans-1,4-polyisoprene (TPI) and low-density polyethylene (LDPE) with easily achievable transition temperatures were prepared by a simple physical blending method. Carbon black (CB) was introduced to improve the mechanical properties of the TPI/LDPE composites. The mechanical, cure, thermal and shape memory properties of the TPI/LDPE/CB composites were investigated in this study. In these composites, the crosslinked network generated in both the TPI and LDPE portions acted as a fixed domain, while the crystalline regions of the TPI and LDPE portions acted as a reversible domain in shape memory behavior. We found the mechanical properties of composites were promoted significantly with an increase of CB content, accompanied with the deterioration of shape memory properties of composites. When CB dosage was 5 parts per hundred of rubber composites (phr), best shape memory property of composites was obtained with a shape fixity ratio of 95.1% and a shape recovery ratio of 95.0%.

Self-healing hydrogel sensors with multiple shape memory properties for human motion monitoring

2021 ◽  
Vol 45 (1) ◽  
pp. 314-320
Author(s):  
Yuewen Chen ◽  
Shengping Dai ◽  
Hao Zhu ◽  
Hongwei Hu ◽  
Ningyi Yuan ◽  
...  
Keyword(s):  
Shape Memory ◽  
Human Motion ◽  
Self Healing ◽  
Shape Memory Properties ◽  
Human Motion Monitoring

Shape memory hydrogels offer new opportunities for the development of smart wearables due to their intelligent responsiveness.

scholarly journals The Effect of 4-Octyldecyloxybenzoic Acid on Liquid-Crystalline Polyurethane Composites with Triple-Shape Memory and Self-Healing Properties

2016 ◽  
Author(s):  
Jianfeng Ban ◽  
Linjiang Zhu ◽  
Shaojun Chen ◽  
Yiping Wang
Keyword(s):  
Shape Memory ◽  
Liquid Crystalline ◽  
Crystallization Rate ◽  
Self Healing ◽  
Two Phase ◽  
Structure Morphology ◽  
Shape Memory Properties ◽  
Triple Shape Memory ◽  
Polyurethane Composites ◽  
Shape Memory Polyurethane

To better understand the shape memory materials and self-healing materials, a new series of liquid-crystalline shape memory polyurethane (LC-SMPU) composites, named SMPU-OOBAm, were successfully prepared by incorporating 4-octyldecyloxybenzoic acid (OOBA) into the PEG-based SMPU. The effect of OOBA on the structure, morphology and properties has been carefully investigated. The results demonstrate that SMPU-OOBAm have liquid crystalline properties, triple-shape memory properties and self-healing properties. The incorporated OOBA promotes the crystallizability of both soft and hard segments of SMPU, and the crystallization rate of the hard segment of SMPU decreases when the OOBA-content increases. Additionally, the SMPU-OOBAm forms a two-phase separated structure (SMPU phase and OOBA phase), and it shows two-step modulus changes upon heating. Therefore, the SMPU-OOBAm shows triple-shape memory behavior, and the shape recovery ratio decreases with an increase in the OOBA content. Finally, SMPU-OOBAm shows self-healing properties. The new mechanism can be ascribed to the heating-induced “bleeding” of OOBA in the liquid crystalline state and the subsequent re-crystallization upon cooling. This successful combination of liquid crystalline properties, triple-shape memory properties and self-healing properties make the SMPU-OOBAm composites with many promise applications in smart optical devices, smart electronic devices and smart sensors.

Effect of Tin Addition on Shape Memory Effect and Mechanical Properties of Cu-Al-Ni Shape Memory Alloy

2020 ◽  
Vol 38 (8A) ◽  
pp. 1178-1186
Author(s):  
Raad S. Ahmed Adnan
Keyword(s):  
Mechanical Properties ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Transformation Temperature ◽  
Mechanical Test ◽  
Hardness Test ◽  
Micro Hardness ◽  
Recovery Strain ◽  
Shape Memory Properties

This study examines the effect of Sn additions on Cu-14%Al-4.5%Ni shape memory alloy. Sn was added in three different percentages (0.3,1,3) %. The alloys were mechanically tested both in compression test and micro hardness test. Also, a thermo-mechanical test was performed on the alloys. Results showed an increase in the transformation temperature outside the domain and also a better recovery strain with the increase of Sn percentage of 3% Sn addition showed the best results in mechanical properties while the 3% Sn showed a better Shape Memory Properties near to super elastic.

Development of zwitterionic polyurethanes with multi-shape memory effects and self-healing properties

2015 ◽  
Vol 3 (6) ◽  
pp. 2924-2933 ◽  
Author(s):  
Shaojun Chen ◽  
Funian Mo ◽  
Yan Yang ◽  
Florian J. Stadler ◽  
Shiguo Chen ◽  
...  
Keyword(s):  
Shape Memory ◽  
Memory Effects ◽  
Hexamethylene Diisocyanate ◽  
Self Healing ◽  
Shape Memory Properties ◽  
Shape Memory Effects

Novel zwitterionic polyurethanes containing sulfobetaines, featuring excellent multi-shape-memory properties and self-healing properties, are prepared from N-methyldiethanolamine, hexamethylene diisocyanate and 1,3-propanesultone.

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