Fabricated Biobased Eucommia Ulmoides Gum/Polyolefin Elastomer Thermoplastic Vulcanizates into a Shape Memory Material

2019 ◽  
Vol 58 (16) ◽  
pp. 6375-6384 ◽  
Author(s):  
Hailan Kang ◽  
Ming Gong ◽  
Mingze Xu ◽  
Haoyu Wang ◽  
Yushi Li ◽  
...  
Keyword(s):  
Shape Memory ◽  
Eucommia Ulmoides ◽  
Shape Memory Material ◽  
Memory Material ◽  
Polyolefin Elastomer ◽  
Thermoplastic Vulcanizates ◽  
Eucommia Ulmoides Gum

scholarly journals Fully Biobased Shape Memory Thermoplastic Vulcanizates from Poly(Lactic Acid) and Modified Natural Eucommia Ulmoides Gum with Co-Continuous Structure and Super Toughness

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2040 ◽  
Author(s):  
Yan Wang ◽  
Jinhui Liu ◽  
Lin Xia ◽  
Mei Shen ◽  
Liping Wei ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Shape Memory ◽  
Poly Lactic Acid ◽  
Eucommia Ulmoides ◽  
Dynamic Vulcanization ◽  
Continuous Structure ◽  
Continuous State ◽  
Thermoplastic Vulcanizates ◽  
Potential Applications ◽  
Eucommia Ulmoides Gum

Novel, fully biobased shape memory thermoplastic vulcanizates (TPVs) were prepared using two sustainable biopolymers, poly(lactic acid) (PLA), and modified natural Eucommia ulmoides gum (EUG-g-GMA), via a dynamic vulcanization technique. Simultaneously, in situ compatibilization was achieved in the TPVs to improve interfacial adhesion and the crosslinked modified Eucommia ulmoides gum (EUG) was in “netlike” continuous state in the PLA matrix to form “sea-sea” phase structure. The promoted interface and co-continuous structure played critical roles in enhancing shape memory capacity and toughness of the TPVs. The TPV with 40 wt % modified EUG displayed the highest toughness with an impact strength of 54.8 kJ/m2 and the most excellent shape memory performances with a shape fixity ratio (Rf) of 99.83% and a shape recovery ratio (Rr) of 93.74%. The prepared shape memory TPVs would open up great potential applications in biobased shape memory materials for smart medical devices.

scholarly journals Additive Manufacturing of Smart Composite Structures Based on Flexinol Wires

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 499
Author(s):  
Olaf Dudek ◽  
Wojciech Klein ◽  
Damian Gąsiorek ◽  
Mariusz Pawlak
Keyword(s):  
Shape Memory ◽  
Composite Structure ◽  
Composite Structures ◽  
Shape Memory Material ◽  
Smart Composite ◽  
Memory Material ◽  
Current Voltage ◽  
Smart Composite Structures ◽  
3D Printed ◽  
Special Approach

3D printing of a composite structure with shape memory materials requires a special approach to the subject, at the stage of the design and printing process. This paper presents the design steps during the development of a 3D-printed composite structure with shape memory material. The connection points between the SMA fibers and the printer filament are developed in the MATLAB environment. Finite element method is used to simulate the shortening of the shape memory material under the influence of temperature and its effect on the printed polymer material is presented. In the MATLAB environment, evolutionary algorithms were used to determine the shape of the SMA fiber alignment. This work demonstrates the use of shape memory effect in 3D printed smart composite structures, where the component takes a predetermined shape. The structure obtained as a result of such printing changes with the heat generated by the current voltage, making it the desired fourth dimension.

Color Changeable Shape Memory Material

Daxue Huaxue ◽  
2020 ◽  
Vol 35 (4) ◽  
pp. 161-167
Author(s):  
Qianqian Qian ◽  
Saisai Liu ◽  
Lu Jiang ◽  
Gang Liu ◽  
Ronglan Wu
Keyword(s):  
Shape Memory ◽  
Shape Memory Material ◽  
Memory Material
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