Development of liquid-crystalline shape-memory polyurethane composites based on polyurethane with semi-crystalline reversible phase and hexadecyloxybenzoic acid for self-healing applications

2014 ◽  
Vol 2 (21) ◽  
pp. 4203-4212 ◽  
Author(s):  
Shaojun Chen ◽  
Hongming Yuan ◽  
Haitao Zhuo ◽  
Shiguo Chen ◽  
Haipeng Yang ◽  
...  
Keyword(s):  
Shape Memory ◽  
Liquid Crystalline ◽  
Self Healing ◽  
Triple Shape Memory ◽  
Polyurethane Composites ◽  
Shape Memory Polyurethane ◽  
Reversible Phase

Novel liquid crystalline shape memory polyurethane composites display liquid crystalline properties, triple-shape memory behaviours and self-healing behaviours.

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.

Insights into liquid-crystalline shape-memory polyurethane composites based on an amorphous reversible phase and hexadecyloxybenzoic acid

2014 ◽  
Vol 2 (6) ◽  
pp. 1041-1049 ◽  
Author(s):  
Shaojun Chen ◽  
Hongming Yuan ◽  
Zaochuan Ge ◽  
Shiguo Chen ◽  
Haitao Zhuo ◽  
...  
Keyword(s):  
Shape Memory ◽  
Liquid Crystalline ◽  
Polyurethane Composites ◽  
Shape Memory Polyurethane ◽  
Reversible Phase

scholarly journals Synthesis of cross-linked triple shape memory polyurethane with self-healing functionalities

2021 ◽  
Vol 96 ◽  
pp. 107099
Author(s):  
Wenwen Zhang ◽  
Xuefei Leng ◽  
Mengyun Gao ◽  
Zhiyong Wei ◽  
Yiying Wang ◽  
...  
Keyword(s):  
Shape Memory ◽  
Self Healing ◽  
Triple Shape Memory ◽  
Shape Memory Polyurethane

NIR-light-induced thermoset shape memory polyurethane composites with self-healing and recyclable functionalities

2020 ◽  
Vol 195 ◽  
pp. 108092 ◽  
Author(s):  
Weining Du ◽  
Yong Jin ◽  
Liangjie Shi ◽  
Yichao Shen ◽  
Shuangquan Lai ◽  
...  
Keyword(s):  
Shape Memory ◽  
Self Healing ◽  
Nir Light ◽  
Polyurethane Composites ◽  
Shape Memory Polyurethane

Recyclable, Self-Healing, Thermadapt Triple-Shape Memory Polymers Based on Dual Dynamic Bonds

2020 ◽  
Vol 12 (8) ◽  
pp. 9833-9841 ◽  
Author(s):  
Huan Zhang ◽  
Dong Wang ◽  
Ningning Wu ◽  
Cuihua Li ◽  
Caizhen Zhu ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymers ◽  
Self Healing ◽  
Triple Shape Memory
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