Asymmetric rebound-swelling based silicone rubber spiral fibers, methods and applications thereof

The preparation of silicone rubber helical fibers by the asymmetric springback-expansion method solves the problem of difficulty in preparing stimulus-responsive deformation capability in the existing technology, realizes multi-stage controllable deformation and multi-functional applications, and is suitable for thermally triggered actuators and electric heaters.

CN122105673APending Publication Date: 2026-05-29HAINAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HAINAN UNIV
Filing Date
2026-03-06
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing technologies make it difficult to prepare silicone rubber helical fibers with stimulus-responsive deformation capabilities, which limits their application as actuators.

Method used

The asymmetric rebound-expansion method is adopted, and two straight silicone rubber fibers are selected. One fiber contains thermally expanded microspheres, while the other does not contain or contains different thermally expanded microspheres. The fibers are stretched and bonded to form a spiral structure, and controllable deformation is achieved by utilizing the asymmetric rebound and thermal expansion effects.

Benefits of technology

It achieves controllable multi-stage deformation of silicone rubber helical fibers from the first state to the second and third states under thermal stimulation, exhibiting significant helical structure changes. It is suitable for disposable thermally triggered actuators and electric heaters, and also has shock absorption and heat insulation functions.

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Abstract

The present application relates to the field of fiber material preparation, and discloses a preparation method of silicone rubber spiral fiber based on asymmetric rebound-expansion, which comprises the following steps: selecting two silicone rubber fibers, the first fiber being a silicone rubber fiber containing thermal expansion microspheres; the second fiber being a silicone rubber fiber not containing or containing thermal expansion microspheres, wherein the initial expansion temperature of the thermal expansion microspheres in the second fiber is higher than the overheating shrinkage temperature of the thermal expansion microspheres in the first fiber. The first fiber or the second fiber is stretched to 200-500% strain, and the other fiber remains original length. The two fibers are placed side by side and closely, adhesive is brushed, and after cross-linking and curing, the two ends are released to make the fibers spontaneously bend and curl, torsion is applied to form a spiral structure with uniform rotation direction, and the silicone rubber spiral fiber is obtained. The present application utilizes the asymmetric rebound principle to prepare the silicone rubber spiral fiber, has adjustable spiral structure, and can realize the heat-stimulated response deformation ability through the asymmetric expansion principle when the fiber is heated.
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