scholarly journals Chitosan/graphene oxide-based multifunctional pH-responsive hydrogel with significant mechanical strength, self-healing property, and shape memory effect

2018 ◽  
Vol 37 (8) ◽  
pp. 3665-3679 ◽  
Author(s):  
Jayashree Nath ◽  
Anupam Chowdhury ◽  
Swapan Kumar Dolui
Keyword(s):  
Graphene Oxide ◽  
Mechanical Strength ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Self Healing ◽  
Ph Responsive ◽  
Healing Property

Salt-mediated triple shape-memory ionic conductive polyampholyte hydrogel for wearable flexible electronics

2021 ◽  
Author(s):  
Shanshan Wu ◽  
Zijian Shao ◽  
Hui Xie ◽  
Tao Xiang ◽  
Shaobing Zhou
Keyword(s):  
Ionic Conductivity ◽  
Shape Memory ◽  
Human Health ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Flexible Electronics ◽  
Strain Sensors ◽  
Self Healing ◽  
Healing Property ◽  
Triple Shape Memory

A type of supramolecular polyampholyte hydrogel with salt-mediated triple shape-memory effect, ionic conductivity, high stretchability and self-healing property was fabricated, which can be applied for strain sensors to monitor human health.

Water-induced shape memory effect of graphene oxide reinforced polyvinyl alcohol nanocomposites

2014 ◽  
Vol 2 (7) ◽  
pp. 2240-2249 ◽  
Author(s):  
Xiaodong Qi ◽  
Xuelin Yao ◽  
Sha Deng ◽  
Tiannan Zhou ◽  
Qiang Fu
Keyword(s):  
Graphene Oxide ◽  
Polyvinyl Alcohol ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect

How graphene oxide affects shape memory properties and strength of poly(l-lactide-co-ε-caprolactone)

2020 ◽  
Vol 31 (18) ◽  
pp. 2152-2164
Author(s):  
Xue-Jiao Zhang ◽  
Qing-Sheng Yang ◽  
Jin-Song Leng
Keyword(s):  
Graphene Oxide ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Shape Memory Polymer ◽  
Covalent Bond ◽  
Uniaxial Tensile ◽  
Oxide Surface ◽  
Microscopic Mechanism ◽  
Softening Effect

Poly( l-lactide-co-ε-caprolactone) is an environment-friendly shape memory polymer. Molecular dynamics method was used to study the shape memory effect and mechanical properties of graphene oxide–reinforced poly( l-lactide-co-ε-caprolactone) to understand the microscopic mechanism. Two models containing dispersed graphene oxide were constructed. It is shown that the addition of graphene oxide causes the glass transition temperature of material to rise because of limitation on polymer activity. The uniaxial tensile properties of the composites were studied. The results exhibited that strength of composites depend on the interface state of the polymer and graphene oxide. The strength of the composite with covalent bond is much higher than that of another without the covalent bond between graphene oxide and poly( l-lactide-co-ε-caprolactone) generated. Stress softening effect was observed in the cross-linked composite in the glass state. Their uniaxial tension thermodynamic cycles were carried out to consider the shape memory effect of the composites. It is shown that graphene oxide–reinforced composites with different interactions exhibit fair shape memory effect in the direction of paralleling graphene oxide surface. In terms of the direction perpendicular to graphene oxide sheet, the fixed ratios of the composites decrease slightly about 1.64%–3.63%, and the recovery ratios of the composites with the covalent bond are higher than others about 3.22%–12.93%.

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