Two-way shape memory polymer composite material and preparation method thereof
AssigneePolyu Base (Shenzhen) Limited
InventorsJinlian Hu, You Wu
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Abstract
A two-way shape memory polymer composite material is provided, which comprises two interpenetrating network polymers, wherein one polymer is a shape memory polymer made of crystalline cross-linked polymer, the other one is a cross-linked elastomeric material. The composite material is formed by interpenetration of two network polymers, wherein one network polymer will shrink under heating and the other network polymer acts as the segment for energy storage. When the first polymer network shrinks under heating, it presses the second polymer network, while the heating is cancelled the pressed second polymer network will enforce the first polymer network to recover the original shape, therefore it has the behavior of two-way shape memory.
Claims11
A polymer composite material with two-way shape memory, comprising:
- a first polymer network formed of a crystalline cross-linked polymer as a shape memory polymer, and
- a second polymer network formed of a cross-linked elastomeric material;
- wherein the first polymer network and the second polymer network interpenetrate with each other to form an interpenetrating structure, and wherein the first polymer network and the second polymer network within the interpenetrating structure have been cross-linked independently of each other;
- wherein the first polymer network acts as a shape memory shrinkage segment which is capable of shrinking from an original state upon heating to a first temperature higher than a transition temperature and reverting to the original state when the temperature is cooled to a second temperature lower than the transition temperature, and the second polymer network acts as an energy storage segment.
Dependencies are inferred from the claim text.