Liquid metal pressure sensing fiber array and preparation method thereof
A technology of liquid metal and sensing fiber, applied in the field of sensing, can solve the problems of high cost, large surface tension of liquid metal, limited precision, etc., to achieve good mechanics and flexibility, increase the test range, and maintain the effects of mechanics and flexibility
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[0050]Some embodiments of the present invention provide a method for preparing a liquid metal pressure sensing fiber array, which specifically includes the following steps:
[0051] 1) Mix PBT and PET and heat at 90-190°C for extrusion molding, then cool with water at 10-20°C to obtain flexible fibers;
[0052] 2) Cover the surface of the flexible fiber with a liquid metal layer by dipping or coating liquid metal; then dip the silicone rubber prepolymer, heat at 70°C for 1-2 hours, and cover the surface of the liquid metal layer with an encapsulation layer .
[0053] Some embodiments of the present invention provide a method for preparing a liquid metal pressure sensing fiber array, which specifically includes the following steps:
[0054] 1) After mixing PBT and PET, heat it at 90-190°C. When the mixture of PBT and PET is heated to the glass transition temperature, add carbon fiber filaments, and use a hole-shaped mold for extrusion molding to prepare flexible fibers contain...
Embodiment 1
[0057] This embodiment provides a liquid metal pressure sensing fiber:
[0058] a) Flexible fibers;
[0059] b) a liquid metal cladding covering said flexible fibers;
[0060] c) an encapsulation layer on the surface of said liquid metal cladding;
[0061] The diameter of the flexible fiber is 80 μm; the liquid metal is GaIn 10 The encapsulation layer is a silicone rubber prepolymer; the flexible fiber is a compound of PBT and PET with a mass ratio of 50:50; the layer thickness of the liquid metal cladding layer is 30 μm; the layer of the encapsulation layer 50 μm thick;
[0062] This embodiment also provides a preparation method of the above-mentioned liquid metal pressure sensing fiber, the method is as follows:
[0063] (1) Mix PBT and PET in proportion and heat it at 125°C. When the mixture reaches the glass transition temperature and becomes a creep state, it is pressed into a hole die through an extruder, quickly stretched into filaments, and then passed through 15°C...
Embodiment 2
[0067] This embodiment provides a liquid metal pressure sensing fiber and its preparation method, which is the same as that of Embodiment 1, except that:
[0068] The flexible fiber includes: a fiber inner core 1 (carbon fiber filament), and a flexible fiber layer 2 covering the fiber inner core 1 (the same as the flexible fiber in Example 1); the diameter of the fiber inner core is 20 μm; the The layer thickness of the flexible fiber layer is 100 μm. Such as figure 1 As shown, the liquid metal cladding layer 3 wraps flexible fibers (the fiber inner core 1 is mixed with the flexible fiber layer 2), and the encapsulation layer 4 is on the surface of the liquid metal cladding layer 3. During its preparation, when the PBT and PET mixture reaches When the glass transition temperature is reached, carbon fiber filaments are added to the hole mold, and the flexible fibers containing carbon fiber filaments in the middle are obtained by extrusion, and then the liquid metal layer and t...
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Abstract
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