A method for improving interfacial bonding between shape memory alloys and polymer materials

A technology of polymer materials and memory alloys, used in chemical instruments and methods, electrolytic coatings, metal layered products, etc., to achieve the effect of improving the bonding strength of the interface and the strength of the interface layer

Active Publication Date: 2015-11-18
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, practice has shown that after a strong interfacial bond is established, material failure often occurs in a region very close to the interface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Pretreatment of titanium-nickel alloy wire: immerse the alloy wire with a diameter of 0.3 mm in a solution of 3% hydrofluoric acid and 15% nitric acid aqueous solution for ultrasonic cleaning until the surface oxide layer is removed from the wire surface visibly. After the treated titanium-nickel wire is cleaned to neutral, it is connected to the cathode of a direct current power supply, immersed in a nickel plating solution containing aminated carbon nanotubes, and electroplated. Plating solution composition: 180g / LNiSO 4 ·7H 2 O, 8g / LNaCl, 30g / LH 3 BO 3 , 20g / LNa 2 SO 4 , 30g / LMgSO 4 , 0.05g / L sodium lauryl sulfate, 1g / L aminated carbon nanotubes. Other parameters: PH value is 5, temperature is 25°C, current density is 3.5A / dm 2 , time 4min. After the electroplating is completed, the wire is cleaned to neutral, and the surface of the alloy wire is observed to be a uniformly coated black coating. The ASTM-B-355 standard was used to test the adhesion between th...

Embodiment 2

[0022] Pre-treated copper-aluminum-manganese alloy plate: the size is 50×50×0.2mm 3 Dip the alloy plate into the mixed acid solution to clean until the surface oxide layer is removed from the surface of the plate visible to the naked eye. The mixed acid components: concentrated sulfuric acid 400ml / L, concentrated hydrochloric acid 5ml / L, concentrated nitric acid 30ml / L, chromic anhydride 10ml / L . After the treated copper-aluminum-manganese alloy plate is cleaned to neutral, it is connected to the cathode of a direct current power supply, immersed in a copper plating solution containing aminated carbon nanotubes, and electroplated. Plating solution composition: 250g / LCuSO 4 , 75g / LH 2 SO 4 , 1.25×10 -6 PDMA, 1 g / L aminated carbon nanotubes. Other parameters: temperature 25°C, current density 3.5A / dm 2 , time 4min. After the electroplating is completed, the plate is cleaned to neutral and ready for use.

[0023] The mixed colloid of bisphenol A epoxy resin and low molecu...

Embodiment 3

[0026] The difference between this embodiment and Example 1 is that the method for preparing carbon nanotube-coated titanium-nickel alloy wire adopts electrophoresis, and its specific steps are as follows: the hydroxylated carbon nanotubes and the nonionic surfactant IgepalCO970 are mixed at 0.05% and 0.5% % mass percentage is added to deionized water to configure an electrophoresis solution, and a titanium-nickel alloy wire with a diameter of 0.3 mm is placed on the positive electrode of the electrophoresis apparatus. Set a constant voltage of 80V and a deposition time of 10min. After the deposition is completed, the wire is cleaned to neutral, and the surface of the alloy wire is observed to be a uniformly coated black coating.

[0027] Put the deposited alloy wire into the mold, then inject the mixed colloid of epoxy resin E51 and 4,4-diaminodiphenylmethane at a mass ratio of 5:1 into the mold, pre-cure at 80°C for 2.5 hours , cured at 150°C for 2.5 hours, and finally a co...

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Abstract

The invention relates to a method for improving bonding of interfaces between a shape memory alloy and a polymer material. The method comprises the following steps of coating the surface of the shape memory alloy with functionalized carbon nano-tubes and embedding the shape memory alloy into the polymer material. The functionalized carbon nano-tubes are implanted into the surface of the shape memory alloy and then the functionalized carbon nano-tubes and the polymer base undergo a chemical reaction so that chemical connection is realized. The method realizes bonding of interfaces between the shape memory alloy and the polymer material and also realizes simultaneous improvement of interface bonding strength and interface layer strength.

Description

technical field [0001] The invention relates to a method for improving the interface bonding between metal and polymer material, in particular to a method for improving the interface bonding between shape memory alloy and polymer material. Background technique [0002] Composite materials formed by embedding shape memory alloys into polymer materials are a new class of smart materials. Using the shape memory recovery property of shape memory alloy as the driving element, the shape change of the polymer matrix under heating conditions can be realized; embedding the pre-strained shape memory alloy in the polymer matrix can effectively inhibit the thermal buckling of the polymer sheet, As well as promoting crack healing of self-healing polymers; at the same time, the high damping properties of shape memory alloys are also used to reduce noise and control vibration. A key issue in whether the above functions can be realized is the interfacial bonding between the shape memory al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/08B32B7/04C25D15/00
Inventor 冯雪米绪军李艳锋尹向前赵利民
Owner GRIMAT ENG INST CO LTD
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