Facile fabrication of foamed natural Eucommia ulmoides gum composites with heat-triggered shape memory behavior

2018 ◽  
Vol 40 (8) ◽  
pp. 3075-3083 ◽  
Author(s):  
Lin Xia ◽  
Han Gao ◽  
Jieting Geng
Keyword(s):  
Shape Memory ◽  
Eucommia Ulmoides ◽  
Shape Memory Behavior ◽  
Facile Fabrication ◽  
Eucommia Ulmoides Gum

scholarly journals Shape Memory Behavior of Natural Eucommia ulmoides Gum and Low-Density Polyethylene Blends with Two Response Temperatures

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 580 ◽  
Author(s):  
Lin Xia ◽  
Shuai Chen ◽  
Wenxin Fu ◽  
Guixue Qiu
Keyword(s):  
Shape Memory ◽  
Thermal Response ◽  
Low Density Polyethylene ◽  
Eucommia Ulmoides ◽  
Low Density ◽  
Shape Memory Behavior ◽  
Blending Method ◽  
Shape Memory Properties ◽  
Different Temperatures ◽  
Eucommia Ulmoides Gum

A series of shape memory blends of natural Eucommia ulmoides gum (EUG) and low-density polyethylene (LDPE) with a bicontinuous cross-linked structure were prepared by a physical blending method, which could be used in the field of thermal response with two different temperatures. We report the shape memory properties of these blended materials with two response temperatures for the first time. The mechanical, curing, thermal and shape memory properties of the blends were studied in this manuscript. Schematic diagrams are proposed to illustrate the dual shape memory behaviors of the EUG/LDPE blends. Our study focused on observing the relationship between the shape memory behavior and the microscopic crystalline phase states in the blends. In the blends, both the cross-linked network and the LDPE crystalline regions could act as fixed domains, while the crystalline regions of LDPE or EUG could act as the reversible domain. The shape memory properties were mainly determined by the components of the fixed and reversible domains. We focused on the shape memory behavior of blends at 60 °C and 130 °C in this manuscript. The results showed that when the peroxide dicumyl peroxide (DCP) dosage was 1.0 phr, the blends exhibited acceptable shape behavior at 60 °C (R1f = 74.8%, R1r = 63.3%). At the same time, when DCP dosage was 0.4 phr, the shape memory behavior of the blends at 130 °C was good and much better than that at 60 °C (R2f = 91.1%, R2r = 89.4%).

Heat‐responsive shape memory Eucommia ulmoides gum composites reinforced by zinc dimethacrylate

2020 ◽  
Vol 137 (38) ◽  
pp. 49133 ◽  
Author(s):  
Hailan Kang ◽  
Mingze Xu ◽  
Haoyu Wang ◽  
Long Li ◽  
Jiaxi Li ◽  
...  
Keyword(s):  
Shape Memory ◽  
Eucommia Ulmoides ◽  
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 Facile fabrication of bio-based Eucommia Ulmoides rubber shape memory foams

2022 ◽  
Vol 106 ◽  
pp. 107455
Author(s):  
Lin Xia ◽  
Yuan Ma ◽  
Qi Wang ◽  
Jiafeng Meng ◽  
Jieting Geng
Keyword(s):  
Shape Memory ◽  
Eucommia Ulmoides ◽  
Facile Fabrication
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