Poly(vinyl butyral) based polymer networks with dual-responsive shape memory and self-healing properties

2014 ◽  
Vol 2 (24) ◽  
pp. 9169 ◽  
Author(s):  
Yongkang Bai ◽  
Yu Chen ◽  
Qihua Wang ◽  
Tingmei Wang
Keyword(s):  
Shape Memory ◽  
Polymer Networks ◽  
Self Healing ◽  
Dual Responsive ◽  
Vinyl Butyral

Dual-responsive shape memory and self-healing ability of a novel copolymer from epoxy/cashew nut shell liquid and polycaprolactone

2020 ◽  
Vol 81 ◽  
pp. 106159 ◽  
Author(s):  
Narubeth Lorwanishpaisarn ◽  
Pornnapa Kasemsiri ◽  
Kaewta Jetsrisuparb ◽  
Jesper T.N. Knijnenburg ◽  
Salim Hiziroglu ◽  
...  
Keyword(s):  
Shape Memory ◽  
Self Healing ◽  
Cashew Nut Shell Liquid ◽  
Dual Responsive ◽  
Cashew Nut ◽  
Cashew Nut Shell

Chitosan‐based double network hydrogels with self‐healing and dual‐responsive shape memory abilities

2019 ◽  
Vol 136 (47) ◽  
pp. 48247 ◽  
Author(s):  
Beijia Fu ◽  
Baoxiao Cheng ◽  
Xiaoqiang Jin ◽  
Xiaojiong Bao ◽  
Zhengke Wang ◽  
...  
Keyword(s):  
Shape Memory ◽  
Self Healing ◽  
Double Network ◽  
Dual Responsive

Enhanced dual-responsive shape memory nanocomposites with rapid and efficient self-healing capability

2018 ◽  
Vol 53 (19) ◽  
pp. 13936-13948 ◽  
Author(s):  
Shuyun Zhuo ◽  
Yanxia Liu ◽  
Lili Zhou ◽  
Xianqi Feng
Keyword(s):  
Shape Memory ◽  
Self Healing ◽  
Dual Responsive

Dual‐responsive shape memory hydrogels with self‐healing and dual‐responsive swelling behaviors

2020 ◽  
Vol 138 (13) ◽  
pp. 50308
Author(s):  
Qianyu Yang ◽  
Chen Gao ◽  
Xuemei Zhang ◽  
Xingyu Zhao ◽  
Yiqing Fu ◽  
...  
Keyword(s):  
Shape Memory ◽  
Self Healing ◽  
Dual Responsive ◽  
Swelling Behaviors

scholarly journals Dynamic Semi IPNs with Duple Dynamic Linkers: Self-Healing, Reprocessing, Welding, and Shape Memory Behaviors

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1679
Author(s):  
Yanning Zeng ◽  
Weiming Yang ◽  
Shuxin Liu ◽  
Xiahui Shi ◽  
Aoqian Xi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Material Properties ◽  
Dynamic Properties ◽  
Thermoplastic Polyurethane ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Diels Alder ◽  
Self Healing ◽  
Boronic Ester

Thermoset polymers show favorable material properties, while bringing about environmental pollution due to non-reprocessing and unrecyclable. Diels–Alder (DA) chemistry or reversible exchange boronic ester bonds have been employed to fabricate recycled polymers with covalent adaptable networks (CANs). Herein, a novel type of CANs with multiple dynamic linkers (DA chemistry and boronic ester bonds) was firstly constructed based on a linear copolymer of styrene and furfuryl methacrylate and boronic ester crosslinker. Thermoplastic polyurethane is introduced into the CANs to give a semi Interpenetrating Polymer Networks (semi IPNs) to enhance the properties of the CANs. We describe the synthesis and dynamic properties of semi IPNs. Because of the DA reaction and transesterification of boronic ester bonds, the topologies of semi IPNs can be altered, contributing to the reprocessing, self-healing, welding, and shape memory behaviors of the produced polymer. Through a microinjection technique, the cut samples of the semi IPNs can be reshaped and mechanical properties of the recycled samples can be well-restored after being remolded at 190 °C for 5 min.

scholarly journals Thermally-Induced Shape-Memory Behavior of Degradable Gelatin-Based Networks

2021 ◽  
Vol 22 (11) ◽  
pp. 5892
Author(s):  
Axel T. Neffe ◽  
Candy Löwenberg ◽  
Konstanze K. Julich-Gruner ◽  
Marc Behl ◽  
Andreas Lendlein
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Shape Recovery ◽  
Polymer Networks ◽  
Water Soluble ◽  
Compression Tests ◽  
Thermally Induced ◽  
Thermomechanical Process ◽  
Triple Helices

Shape-memory hydrogels (SMH) are multifunctional, actively-moving polymers of interest in biomedicine. In loosely crosslinked polymer networks, gelatin chains may form triple helices, which can act as temporary net points in SMH, depending on the presence of salts. Here, we show programming and initiation of the shape-memory effect of such networks based on a thermomechanical process compatible with the physiological environment. The SMH were synthesized by reaction of glycidylmethacrylated gelatin with oligo(ethylene glycol) (OEG) α,ω-dithiols of varying crosslinker length and amount. Triple helicalization of gelatin chains is shown directly by wide-angle X-ray scattering and indirectly via the mechanical behavior at different temperatures. The ability to form triple helices increased with the molar mass of the crosslinker. Hydrogels had storage moduli of 0.27–23 kPa and Young’s moduli of 215–360 kPa at 4 °C. The hydrogels were hydrolytically degradable, with full degradation to water-soluble products within one week at 37 °C and pH = 7.4. A thermally-induced shape-memory effect is demonstrated in bending as well as in compression tests, in which shape recovery with excellent shape-recovery rates Rr close to 100% were observed. In the future, the material presented here could be applied, e.g., as self-anchoring devices mechanically resembling the extracellular matrix.

New star-shape memory polyurethanes capable of thermally induced recovery and hydrogen bond-self-healing

2021 ◽  
Author(s):  
Zonghui Huang ◽  
Jianfeng Ban ◽  
Lulu Pan ◽  
Shuqing Cai ◽  
Junqiu Liao
Keyword(s):  
Hydrogen Bond ◽  
Shape Memory ◽  
Self Healing ◽  
Thermally Induced ◽  
Thermally Responsive

Star-shape memory polyurethanes that combine thermally responsive and self-healing properties.

Sign in / Sign up

Export Citation Format

Share Document