Design of Triple-Shape Memory Polyurethane with Photo-cross-linking of Cinnamon Groups

2013 ◽  
Vol 5 (21) ◽  
pp. 10520-10528 ◽  
Author(s):  
Lin Wang ◽  
Xifeng Yang ◽  
Hongmei Chen ◽  
Tao Gong ◽  
Wenbing Li ◽  
...  
Keyword(s):  
Shape Memory ◽  
Cross Linking ◽  
Triple Shape Memory ◽  
Shape Memory Polyurethane

Study on sisal-based polyurethane foam with multi-shape memory properties

2021 ◽  
Author(s):  
Lulu Pan ◽  
Jianfeng Ban ◽  
Tiwen Xu ◽  
Ruiquan Liu ◽  
Shaorong Lu
Keyword(s):  
Shape Memory ◽  
Polyurethane Foam ◽  
Cross Linking ◽  
Hydroxyl Groups ◽  
Shape Memory Properties ◽  
New Type ◽  
Shape Memory Polyurethane ◽  
Chemical Cross Linking

A new type of sisal-based shape memory polyurethane foam (SMPU-PSF) was prepared by chemical cross-linking of hydroxyl groups on sisal cellulose (PSF) with polycaprolactone and MDI, which used PSF as...

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.

Photoinduced triple shape memory polyurethane enabled by doping with azobenzene and GO

2016 ◽  
Vol 4 (42) ◽  
pp. 9993-9997 ◽  
Author(s):  
Liming Zhou ◽  
Qiang Liu ◽  
Xuande Lv ◽  
Lijun Gao ◽  
Shaoming Fang ◽  
...  
Keyword(s):  
Shape Memory ◽  
Nanocomposite Film ◽  
Polymer Dispersed ◽  
Triple Shape Memory ◽  
Shape Memory Polyurethane

A polymer-dispersed azobenzene and GO nanocomposite film was fabricated with shape memory polyurethane as a matrix.

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

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.

Flexible cross-linking of shape memory polyurethane by a long polyethyleneglycol spacer

2009 ◽  
Vol 10 (6) ◽  
pp. 743-749 ◽  
Author(s):  
Yong-Chan Chung ◽  
Jae Won Choi ◽  
Jae Min Jung ◽  
Byoung Chul Chun
Keyword(s):  
Shape Memory ◽  
Cross Linking ◽  
Shape Memory Polyurethane

Multidirectional Triple-Shape-Memory Polymer by Tunable Cross-linking and Crystallization

2020 ◽  
Vol 12 (5) ◽  
pp. 6426-6435 ◽  
Author(s):  
Ming Tian ◽  
Weisheng Gao ◽  
Jing Hu ◽  
Xiaowei Xu ◽  
Nanying Ning ◽  
...  
Keyword(s):  
Shape Memory ◽  
Shape Memory Polymer ◽  
Cross Linking ◽  
Triple Shape Memory

Thermo- and pH-sensitive shape memory polyurethane containing carboxyl groups

2016 ◽  
Vol 7 (9) ◽  
pp. 1739-1746 ◽  
Author(s):  
Qiuju Song ◽  
Hongmei Chen ◽  
Shaobing Zhou ◽  
Keqing Zhao ◽  
Biqing Wang ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Ph Sensitive ◽  
Carboxyl Groups ◽  
Triple Shape Memory ◽  
Shape Memory Polyurethane

A type of polyurethane with carboxylic acid, exhibits a thermo-induced triple-shape memory effect and a pH sensitive dual-shape memory effect.

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