CN104325652A - Polyurethane composite material doped by nickel-titanium memory alloy and carbon nanotube and preparation method thereof - Google Patents
Polyurethane composite material doped by nickel-titanium memory alloy and carbon nanotube and preparation method thereof Download PDFInfo
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- CN104325652A CN104325652A CN201410445458.8A CN201410445458A CN104325652A CN 104325652 A CN104325652 A CN 104325652A CN 201410445458 A CN201410445458 A CN 201410445458A CN 104325652 A CN104325652 A CN 104325652A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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Abstract
The invention provides a polyurethane composite material doped by a nickel-titanium memory alloy and carbon nanotube, and a preparation method thereof. The preparation method comprises the following steps: (1) winding NiTi alloy wires around a spring winding machine to form a spring structure; (2) subjecting the obtained spring to a thermal treatment with a temperature of 400 to 500 DEG C; (3) mechanically stirring and mixing carbon nanotubes and polyurethane elastomer particles; (4) painting a demoulding agent on the inner surface of a mould; (5) placing the mixture obtained in the step (3) into the mould, melting the mixture at a temperature of 190 to 220 DEG C, and moulding; (6) evenly placing the NiTi alloy springs on the layer prepared in the step (5), then dispersing the mixture of carbon nanotubes and polyurethane elastomer around the NiTi springs until the springs are totally covered; (7) finally carrying out composite material melting and moulding in an air blast constant temperature oven. The prepared material is a damping intelligent composite material having a shape memory effect, is capable of adapting to the environmental and temperature changes, and can be applied to the vibration damping field.
Description
Technical field
The present invention relates to a kind of preparation method of polyurethane-base composite, particularly a kind of Ultimum Ti and the composite mixed compound polyurethane material of CNT and preparation method.
Background technology
The most direct effective method of one controlling vibration & noise uses damping material, and changes mechanical energy vibration produced is that thermal energy consumption dissipates, thus reaches the object of vibration and noise reducing.Visco-elastic damping material studies high damping material the most widely at present.Visco-elastic damping material is the macromolecular material such as polymer mainly, has light specific gravity, is easy to processing, and can produce larger damping.But, visco-elastic damping material due to rigidity, intensity is low and creep resistance is poor, can not use as structural material.The nano materials such as CNT, owing to having large specific area and excellent mechanical property, therefore improve the mechanical property of polymeric matrix through being often used as reinforcement.Jonghwan etc. publish an article explanation on internationally famous periodical Nature Materials, and CNT, except showing higher hot strength, Young's modulus, good conduction and heat conductivility, also has good damping capacity.The damping capacity of CNT mainly has benefited from its nano level size and higher draw ratio, and when being added to after in resin matrix by CNT, the interfacial contact area between CNT and matrix is very large.Under certain vibration condition, CNT with the mode such as interface sliding, friction consumed energy, thus makes the damping capacity of composite be greatly improved in polymeric matrix.Therefore, carbon nano tube-doped polymeric matrix is utilized to be the effective ways comprehensively improving composite materials property and damping capacity.
In addition, it should be noted that in practical engineering application, external vibration change and variation of ambient temperature etc. all can affect mechanical property and the damping capacity of visco-elastic damping material, viscoelastic material can not according to change of external conditions active accommodation self performance, and this significantly limit the engineering scope of application of visco-elastic damping material undoubtedly.Therefore, exploitation can adapt to external environment change and suitably the intelligent damping material of self mechanical property of adjustment and dynamic mechanical behavior will be the emphasis of following damping material development.NiTi base marmem, owing to can there is Thermoelastic Martensitic Transformation in A at temperature or stress drive, shows good super-elasticity, SME and damping characteristic.NiTi base marmem has higher intensity, good plasticity and cold and hot working performance simultaneously, good corrosion resistance, can eliminate due to use for a long time bring aging and reliability change caused by problem.In addition, NiTi alloy can realize super-elasticity and SME by martensitic traoformation along with extraneous stress and variations in temperature, produces large strain and replys.Therefore NiTi alloy can change by sensing external environment, is changed responding to external world, thus realize the Based Intelligent Control of damping capacity and mechanical attribute by alteration of form and material structure.If by NiTi alloy and visco-elastic damping material compound, ensureing the intelligent attributes can giving the change of damping material adaptation external environment while material has high damping.
To sum up, CNT and NiTi alloy compound being mixed visco-elastic damping material is prepare the effective way with high strength, high damping and intelligent attributes composite.What relate generally in the open document reported at present is single effect of filling some carbon fiber nanotube or NiTi B alloy wire etc. in viscoelastic resin material, the mechanical property of mainly CNT/resin composite materials of research and the shock resistance mechanical property etc. of damping capacity and NiTi B alloy wire/resin composite materials, all fail to take into full account the Acclimation temperature characteristic of polymer matrix composites and deeply probe into and how to make the intelligent attributes of composite and damping characteristic obtain good combination.And, in composite preparation in the past, main employing is solution mixing method, namely utilize organic solvent dissolution resin matrix then with dose Material cladding, finally volatilize solvent aftershaping, and this kind of method has that preparation efficiency is low, cost is higher, the more difficult shortcomings such as removal of volatilizing completely of solvent.
Summary of the invention
The object of the present invention is to provide a kind of Ultimum Ti and the composite mixed compound polyurethane material of CNT with excellent damping characteristic and SME.The present invention also aims to provide the preparation method of a kind of technique is simple, reproducible, cost is low Ultimum Ti and the composite mixed compound polyurethane material of CNT.
The object of the present invention is achieved like this:
Ultimum Ti of the present invention and the composite mixed compound polyurethane material of CNT are: string diameter is that the NiTi alloy wire of 0.1 ~ 0.3mm is wound in spring structure on spring Coil-up machine by (1); (2) spring after coiling obtains room temperature super-elasticity at 400 ~ 500 DEG C of heat treatment 30min; (3) CNT and polyurethane elastomer particle machinery are uniformly mixed, make even carbon nanotube be coated on polyurethane elastomer particle surface, the content of CNT is 0.1 ~ 0.5wt%; (4) releasing agent is applied in mould inner surface; (5) CNT of preparation in step (3) and polyurethane elastomer mixture are placed in mould, at 190 ~ 220 DEG C of hot melt moldings; (6) NiTi alloy spring is evenly laid in laying of preparation in (5), then CNT and polyurethane elastomer mixture is scattered in around NiTi spring and NiTi spring is covered completely; (7) in air blast insulating box, carry out composite material forming, hot melting temperature is 190 ~ 220 DEG C, and molding time is 20 ~ 60min, the Ultimum Ti obtained after mold cools down and the composite mixed compound polyurethane material of CNT.
The preparation method of Ultimum Ti of the present invention and the composite mixed compound polyurethane material of CNT comprises:
(1) NiTi memory alloy spring preparation:
1) be that the NiTi alloy wire of 0.1 ~ 0.3mm is wound in spring structure on spring Coil-up machine by string diameter;
2) spring after coiling obtains NiTi alloy spring at 400 ~ 500 DEG C of heat treatment 30min;
(2) composite preparation:
3) CNT (CNT) and polyurethane elastomer (TPU) particle machinery are uniformly mixed, the content of CNT is 0.1 ~ 0.5wt%, makes even carbon nanotube be coated on polyurethane elastomer particle surface;
4) releasing agent is applied in mould inner surface, is conducive to the demoulding after composite material forming;
5) by step 3) in preparation CNT and polyurethane elastomer mixture be placed in mould, at 190 ~ 220 DEG C of hot melt moldings;
6) NiTi alloy spring is evenly laid in 5) in preparation laying on, then CNT and polyurethane elastomer mixture to be scattered in around NiTi spring and NiTi spring structure are covered completely;
7) matched moulds, carries out composite material forming in air blast insulating box, and hot melting temperature is 190 ~ 220 DEG C, and molding time is 20 ~ 60min.
Starting point of the present invention is, select polyurethane (PU) material with the advantage such as wear-resisting, corrosion-resistant of current extensively investigation and application as matrices of composite material, using CNT and NiTi alloy spring (spring structure report than ever silk material there is better damping effect) as filler, utilize have high efficiency, low cost feature hot melt molding legal system for CNT and the composite mixed polyurethane-base composite of NiTi alloy, to obtaining the intelligent composite having good temperature response characteristics and damping characteristic concurrently.
The present invention utilizes hot melt molding method that polyurethane elastomer particle, CNT and NiTi memory alloy spring structure are hot pressed into composite.CNT and the composite mixed compound polyurethane material of NiTi alloy show good damping characteristic and shape memory recovery characteristic, have vibration damping and temperature-responsive intelligent attributes concurrently.The preparation technology of this composite is simple, cost is low, reproducible, be suitable for batch production.
Accompanying drawing explanation
Fig. 1 is the structural representation of NiTi/CNT/TPU composite;
Fig. 2 is the preparation process schematic diagram of NiTi/CNT/TPU composite;
Fig. 3 a-Fig. 3 b is the DSC curve of NiTi memory alloy spring, and wherein Fig. 3 a is before heat treatment, Fig. 3 b is after heat treatment;
Fig. 4 is the stretching mechanical curve of NiTi memory alloy spring;
Fig. 5 a-Fig. 5 b is the Fracture scan photo of NiTi/CNT/TPU composite, and wherein Fig. 5 a is the interface of CNT and TPU matrix, Fig. 5 b is NiTi spring and TPU matrix;
Fig. 6 is the dynamic thermal machinery analyses test curve of NiTi/CNT/TPU composite;
Fig. 7 is the shape recovery rate test curve of NiTi/CNT/TPU composite.
Detailed description of the invention
Illustrate below and the present invention be described in more detail:
The preparation were established of composition graphs 2, NiTi memory alloy spring and the composite mixed compound polyurethane material of CNT is:
(1) be the Ni of 0.2mm by string diameter
50.9ti
49.1alloy wire is wound in spring structure on spring Coil-up machine, and the spring footpath of spring and spring are apart from being 1mm.
(2) spring after coiling obtains room temperature super-elasticity at 450 DEG C of heat treatment 30min.
(3) churned mechanically method is utilized to mix the multi-walled carbon nano-tubes containing carboxyl and 8185 (the Yantai Wan Hua polyurethane company trade mark) thermoplastic polyether urethane elastomer particles, make CNT evenly be coated on TPU particle surface, CNT content is 0.3wt%.
(4) silicone oil is applied in hot melt molding stainless steel mould inner surface, conveniently stripped.
(5) the CNT-TPU mixture of preparation in step (3) is placed in mould, at 195 DEG C of hot melt moldings, temperature retention time is 20min, preparation CNT-TPU composite plys.
(6) the NiTi alloy spring after heat treatment in step (2) is evenly laid in laying of preparation in (5), then the CNT-TPU mixture in step (3) is scattered in around NiTi spring and NiTi spring structure is covered completely.
(7) matched moulds, carries out composite material forming in air blast insulating box, and hot melting temperature is 195 DEG C, and molding time is 20min.
(8) utilize differential scanning calorimeter to test the martensite transfor mation behavior of NiTi alloy spring, as shown in Figure 3 a, alloy spring shows two step martensitic traoformation A → R → M, and anti-phase becomes a step phase transformation M → A, and under room temperature, alloy is Ovshinsky figure.Fig. 3 b is depicted as the DSC curve of alloy spring after 195 DEG C/20min (this condition is the temperature and time of composite material forming) heat treatment, compared with before heat treatment, phase transformation change is little, and therefore composite material shaping process can not affect the martensitic traoformation behavior of NiTi spring.
(9) universal electrical cupping machine is utilized to test the super-elasticity behavior of NiTi spring, as shown in Figure 4, under different strained conditions, NiTi spring all shows obvious super elastic characteristics, the area that loading-unloading circulation is surrounded represents the energy consumed in cyclic process, and this is conducive to improving the energy dissipating characteristics of composite outside under Cyclic Stress condition;
(10) microstructure of sem observation composite is utilized, as shown in Fig. 5 a-Fig. 5 b, the interface cohesion of CNT and TPU matrix is good (Fig. 5 a), NiTi spring and TPU matrix also have good interface cohesion (Fig. 5 b), and this illustrates the NiTi/CNT/TPU composite utilizing hot melt molding to obtain to have good interface to combine;
(11) the damping loss characteristic of dynamic mechanical test instrument test compound material under different frequency, temperature conditions is utilized, as shown in Figure 6 (DMA curve), along with test frequency increases, the damping of composite increases, and the most high damping fissipation factor of composite when 20Hz is 0.38;
(12) the shape memory recovery characteristic of cupping machine test compound material is utilized, as shown in Figure 7, along with stretcher strain amount increases, the shape recovery rate of composite raises, when the elongation strain of composite is 200%, shape recovery rate more than 97%, can show good recovery of shape characteristic.
Claims (2)
1. Ultimum Ti and the composite mixed compound polyurethane material of CNT, is characterized in that it being Ultimum Ti obtained as follows and the composite mixed compound polyurethane material of CNT: string diameter is that the NiTi alloy wire of 0.1 ~ 0.3mm is wound in spring structure on spring Coil-up machine by (1); (2) spring after coiling is at 400 ~ 500 DEG C of heat treatment 30min; (3) CNT and polyurethane elastomer particle machinery are uniformly mixed, make even carbon nanotube be coated on polyurethane elastomer particle surface, the content of CNT is 0.1 ~ 0.5wt%; (4) releasing agent is applied in mould inner surface; (5) CNT of preparation in step (3) and polyurethane elastomer mixture are placed in mould, at 190 ~ 220 DEG C of hot melt moldings; (6) NiTi alloy spring is evenly laid in laying of preparation in (5), then CNT and polyurethane elastomer mixture is scattered in around NiTi spring and NiTi spring is covered completely; (7) in air blast insulating box, carry out composite hot melt molding, hot melting temperature is 190 ~ 220 DEG C, and molding time is 20 ~ 60min, mould unloading after mold cools down.
2. a preparation method for Ultimum Ti and the composite mixed compound polyurethane material of CNT, is characterized in that:
(1) NiTi memory alloy spring preparation:
1) be that the NiTi alloy wire of 0.1 ~ 0.3mm is wound in spring structure on spring Coil-up machine by string diameter;
2) spring after coiling obtains NiTi alloy spring at 400 ~ 500 DEG C of heat treatment 30min;
(2) composite preparation:
3) CNT (CNT) and polyurethane elastomer (TPU) particle machinery are uniformly mixed, the content of CNT is 0.1 ~ 0.5wt%, makes even carbon nanotube be coated on polyurethane elastomer particle surface;
4) releasing agent is applied in mould inner surface;
5) by step 3) in preparation CNT and polyurethane elastomer mixture be placed in mould, at 190 ~ 220 DEG C of hot melt moldings;
6) NiTi alloy spring is evenly laid in 5) in preparation laying on, then CNT and polyurethane elastomer mixture to be scattered in around NiTi spring and NiTi spring structure are covered completely;
7) matched moulds, carries out composite material forming in air blast insulating box, and hot melting temperature is 190 ~ 220 DEG C, and molding time is 20 ~ 60min.
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| CN201410445458.8A CN104325652B (en) | 2013-10-11 | 2014-09-03 | Ultimum Ti and the composite mixed compound polyurethane material of CNT and preparation method |
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| CN107406899A (en) * | 2015-04-02 | 2017-11-28 | 通用电气(Ge)贝克休斯有限责任公司 | Superhigh temperature Elasto metallic plastic composites |
| US10427336B2 (en) | 2014-11-20 | 2019-10-01 | Baker Hughes, A Ge Company, Llc | Periodic structured composite and articles therefrom |
| US10450828B2 (en) | 2016-10-28 | 2019-10-22 | Baker Hughes, A Ge Company, Llc | High temperature high extrusion resistant packer |
| CN110918840A (en) * | 2019-12-05 | 2020-03-27 | 中国石油大学(北京) | Method for preparing NiTi memory alloy spring by amorphous mold |
| US10759092B2 (en) | 2015-11-19 | 2020-09-01 | Baker Hughes, A Ge Company, Llc | Methods of making high temperature elastic composites |
| CN113652078A (en) * | 2021-08-23 | 2021-11-16 | 华南理工大学 | Composite material for vibration reduction and preparation method thereof |
| CN113733593A (en) * | 2021-07-30 | 2021-12-03 | 浙江理工大学 | Preparation method and electrifying method of active variable-stiffness composite material arc spring |
| CN114686923A (en) * | 2022-03-15 | 2022-07-01 | 大连交通大学 | Preparation method of intelligent molecular switch |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10427336B2 (en) | 2014-11-20 | 2019-10-01 | Baker Hughes, A Ge Company, Llc | Periodic structured composite and articles therefrom |
| US11225000B2 (en) | 2014-11-20 | 2022-01-18 | Baker Hughes, A Ge Company, Llc | Periodic structured composite and articles therefrom |
| CN107406899A (en) * | 2015-04-02 | 2017-11-28 | 通用电气(Ge)贝克休斯有限责任公司 | Superhigh temperature Elasto metallic plastic composites |
| CN107406899B (en) * | 2015-04-02 | 2020-10-27 | 通用电气(Ge)贝克休斯有限责任公司 | Ultra-high temperature elastic metal composite material |
| US10759092B2 (en) | 2015-11-19 | 2020-09-01 | Baker Hughes, A Ge Company, Llc | Methods of making high temperature elastic composites |
| CN106496956A (en) * | 2016-10-20 | 2017-03-15 | 哈尔滨工程大学 | A kind of marmem and the modification processing method of resin boundary surface |
| US10450828B2 (en) | 2016-10-28 | 2019-10-22 | Baker Hughes, A Ge Company, Llc | High temperature high extrusion resistant packer |
| CN110918840A (en) * | 2019-12-05 | 2020-03-27 | 中国石油大学(北京) | Method for preparing NiTi memory alloy spring by amorphous mold |
| CN113733593A (en) * | 2021-07-30 | 2021-12-03 | 浙江理工大学 | Preparation method and electrifying method of active variable-stiffness composite material arc spring |
| CN113652078A (en) * | 2021-08-23 | 2021-11-16 | 华南理工大学 | Composite material for vibration reduction and preparation method thereof |
| CN114686923A (en) * | 2022-03-15 | 2022-07-01 | 大连交通大学 | Preparation method of intelligent molecular switch |
| CN114686923B (en) * | 2022-03-15 | 2023-11-10 | 大连交通大学 | Preparation method of intelligent molecular switch |
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Effective date of registration: 20160901 Address after: 150000, Heilongjiang province Harbin Harbin hi tech Industrial Development Zone, science and technology innovation city, innovation and entrepreneurship Plaza 14, 236 Lou Mingyue street, torch e-commerce building, room 513 Patentee after: Ganges RIver Heilongjiang Sand Technology Development Co., Ltd. Address before: 150001 Heilongjiang, Nangang District, Nantong street,, Harbin Engineering University, Department of Intellectual Property Office Patentee before: Harbin Engineering Univ. |