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Introduction:
Copper foam is a new multifunctional material with a large number of connected or non-connected pores evenly distributed on the copper substrate.
Copper foam has good conductivity and ductility. Compared with nickel foam, the preparation cost is low and the conductivity is good. It can be used to prepare battery negative electrode (carrier) materials, catalyst carriers and electromagnetic shielding materials. In particular, copper foam has some obvious advantages as the base material of battery electrodes, but because the corrosion resistance of copper is not as good as that of nickel, it also limits some of its applications.
Using polyurethane soft foam as the substrate, copper foam with a uniformly distributed three-dimensional network pore structure, high porosity (>95%) and certain tensile strength was prepared through pretreatment, chemical deposition, electrode position, incineration and thermal reduction processes.
Aperture | 0.1mm-10mm(can customized) |
Porosity | 60%-98% |
Through porosity | ≥98% |
Bulk density | 0.1-0.8g/cm3 |
PPI | 5-130 |
size | Customized |
Tensile Strength | 5-18KPa |
compressive strength | ≥250KPa |
mechanical strength | ≥2-5KPa |
High temperature resistance | ≥900ºC |
Heat transfer coefficient | >6W/(m2k) |
Its air permeability is very high, almost all are connected pores, the specific surface area of the pores is large, and the bulk density of the material is small.
The preparation of metal foam includes powder metallurgy and electroplating. The former makes metal foam by adding a foaming agent to molten metal; the latter replicates metal foam on the polyurethane foam skeleton through an electrodeposition process.
The powder metallurgy method to manufacture metal foam is to add a
foaming agent (such as NH4Cl) to the powder, and the foaming agent
volatilizes during sintering, leaving pores. Metal foams with
regular shape pores and a porosity up to 95% can be prepared by
electrochemical deposition, including foam materials with Cu, Ni,
NiCrFe, ZnCu, NiCu, NiCrW, NiFe and other metals and alloys as the
skeleton. The metal electrochemically deposited on the porous body
is sintered to connect the deposited components into a whole, and
the high-porosity metal foam with the required strength has high
porosity and can be filled with more substances such as catalysts
and electrolytes during use.
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1. Electrode material.
Due to its good electrical conductivity, foamed copper can be
widely used in electrode skeleton materials of new batteries, such
as nickel-zinc batteries, electric double-layer capacitors, etc.,
and foamed copper is expected to be promoted as the electrode
current collector of electric double-layer capacitors; in addition,
foamed copper Copper can also be used as an electrode material for
electrolytic recovery of copper-containing wastewater, which has
broad application prospects.
2. Catalysis.
At present, in many organic chemical reactions, it is attempted to
directly replace punched copper plates with copper foam with a
large specific surface area as a catalyst for chemical reactions,
and using copper foam as a carrier for photo catalytic air
purification is also relatively successful.
3. Thermally conductive material.
Blister copper has become an excellent flame-retardant material due
to its good thermal conductivity, and has been used in many
advanced fire-fighting equipment abroad, especially as a flame
insulation device, the effect is better; in addition, people also
Using the excellent thermal conductivity and apparent permeability
of foamed copper, heat-dissipating motors and electrical appliances
are made.
4. Noise reduction and shielding device.
The sound wave is diffusely reflected on the surface of copper
foam, and the noise reduction effect is achieved through the
principles of expansion and micropore noise reduction; the
shielding performance of copper is close to that of silver, and it
is an electromagnetic shielding material with excellent
performance.
5. Filter material.
Copper foam products have structural properties and are basically
harmless to the human body, and have been successfully used in
medical filter materials; at the same time, copper foam also has a
good application prospect in water purification equipment.
6. Materials that buffer fluid pressure.
The dispersing and buffering effect of copper foam on the fluid
makes it a pressure release protection device for various pressure
gauges with good results.