Black lead Xi is had exceedingly good electricity and thermodynamic wait for function, it is good heat conduction stuff not only, also be material of first-rate of the conductivity below room temperature at the same time, because Xi of this black lead is considered as colophony radical,composite material promotes electric, heat conduction the ideal filling of function.
The typical characteristic of epoxy resin is cohere sex strong, because be had in structure of annulus oxygen element,this is of bigger active contain oxygen radical group, very lively, easy rather he base group happening reaction, and have stronger cohere sex, can increase the shear strength of material. Next the stability of epoxy resin and corrosion resistance are stronger, and epoxy resin not solidify Shi Kerong in the organic dissolvent at much, because this can leave long-term and airtight store in room temperature condition. More important is, the molecular span in system of the epoxy resin after solidify will be more close together, can form stable three-dimensional and reticulate structure, can mix with aleatoric scale with other data, this brought up the treatment performance with good epoxy resin. But epoxy resin is not high temperature resistant and be able to bear or endure ultraviolet light, and the concussion performance of condensate is poorer. In recent document report, join accept rice material to wait add relative to its modified, among them, black lead Xi increases in epoxy resin, respect of the modified that add pliable but strong has good applied prospect. Accordingly, black lead Xi / epoxy resin composite material caused extensive research and attention.
Black lead Xi / the newest research of epoxy resin composite material makes progress
1, black lead Xi adds a quantity to be opposite black lead Xi / annulus oxygen the influence of composite material function
The accretion of black lead Xi measures the function to composite material to having main effect, also be some closer year of black lead Xi / the important way that epoxy resin composite material studies, graph 1 collect the research achievement of a few models. Fu Yuan-xiang group considers to discover black lead Xi is the biggest add a quantity to be 10.1% when, the thermal conductance of composite material is 4.01 W·m-1·K-1, photograph of purer epoxy resin is compared promoted 22 times, can apply effectively in heat management field. Research discovers to fixed black lead Xi - annulus oxygen system, rice of accept of Xi of not commensurate black lead is added in epoxy resin belt (GNP) not total meeting improves drawing performance significantly, and drawing plasticity and rupture tenacity can produce change along with GNP chroma, because composite material of GNP/ epoxy resin is put in the “ of soft photograph to change area ” in vain, below higher concentration GNP can happen reunite, bring about its to rupture mechanism change.
The Kernin 3 roller that cut through height are abrade method, compose builds an epoxy resin network of black lead Xi, the dynamic change process that studied filling of rice of accept of black lead Xi lets time, came true to add a quantity to fall in inferior black lead Xi at the same time (0.5% ) , composite material also can acquire good electrical conductivity and heat conduction property, as contrary as low density, the Xi of change black lead such as Varenik adds a capacity, xi of implementation black lead is measured in taller accretion below (16% ) , the viscosity of composite material can adjust the cost of coefficient of thermal conductivity that requires to place.
The Prolongo experiment that measures through be being added to GNP studies, the mechanical intensity that discovers composite material adds the accretion of the quantity along with GNP and increase, in the accretion of 8% the volume falls, emissivity is the biggest increased 210% . Measure besides the accretion that pays close attention to black lead Xi besides, the dug such as Shen the influence of number of plies of black lead Xi to thermal conductance of epoxy resin composite material, innovation sex ground introduces an element kinetic method, imitate computation is built-in the thermal conductance of plane of black lead Xi and interfacial direction, the rice of accept of black lead Xi that discovery should add more than 10 belt, content is 2.8% (bulk mark) when, the thermal conductance of its composite material is 1.5 W·m-1·K-1. The preparation such as Long gives oxide of Xi of functional fossil Chinese ink (FGO) , ask for its chemistry structure with spectral watch, go to the FGO fill of 0.2% in epoxy resin, the tensile strength that gains composite material can amount to 2.76 GPa.
Graph Xi of 1 different black lead adds Xi of the black lead below the quantity / the electrical conductivity of epoxy resin, thermal conductance
2, black lead Xi adds configuration to be opposite black lead Xi / annulus oxygen the influence of composite material function
Black lead Xi adds the different pattern of the photograph to have main effect to the function of its composite material, the filmy configuration of black lead Xi arranges the heat that is research with its, graph 2 collect relevant relatively typical research achievement. Solved the tall viscosity problem that liquid technology middling sees BusteroI through supporting methodological part of film oneself, through be in epoxy resin and carbolic accept rice provide Buck paper (CNT-BP) in built-in the Xi of independent type black lead that differs 2 kinds is filmy, when discovery should introduce the black lead Xi of 30% , the coefficient of thermal conductivity of epoxy resin polymer raises 20W·m-1·K-1 from 0.20W·m-1·K-1. It is filmy configuration of black lead Xi together, the research such as Zhang discovers, directional arrange can form medicinal powder hot passageway, the quantity is added to be in black lead Xi 44% when, the coefficient of thermal conductivity of composite material is as high as 384.9 W·m-1·K-1, rose than pure epoxy resin about 3570% .
To it similar, conduct Hao H in different thermal current black lead Xi is formed to heat up a passageway between direction, the micromechanism that confirmed measure is relevant can transform further from anisotropy for isotropy, in introduce the black lead Xi of 5.5% to add a quantity to fall, the thermal conductance of composite material is 10W·m-1·K-1, achieve 55 times of pure epoxy resin, above proved black lead Xi adds what form to come loose the main effect that heats up a passageway to raise thermal conductivity to its.
Graph Xi of 2 different black lead adds Xi of the black lead below configuration / the electrical conductivity of epoxy resin, thermal conductance
Black lead Xi / the aviation application of epoxy resin composite material
Composite material with its intensity tall, weight is light wait for good performance, applied limits is extended ceaselessly, replace metallic stuff stage by stage on actual application, showed huge application potential in aviation domain especially. Researcher discovery, xi of Fu black lead is wrapped on plane wing / the coating of epoxy resin composite material but the glacial ala on effective purify wing, the experiment shows in 0 the ambient conditions of 20 ℃ falls, coating still can melt on wing leaf coming back several centimeters of thick ice layers. This method is belonged to in deice system active anti-icing law, can avoid chemistry not only anti-icing the environment that the method produces pollutes a problem, also have more wide suitable scope and latent capacity.
Be in anti-icing applied respect of the system, raji through preparation rice of ultrathin accept of black lead Xi takes film, film of Xi of this black lead can realize radio frequency to transmit, although be below temperature low-down condition, also can maintain extremely tall optical diaphaneity, through undertaking adjustment to filmy resistor, if plan institute shows an experiment to prove, the rice of accept of black lead Xi that passes chemistry and supersonic processing takes film to be able to be in deice heats below cold condition, revealed aviation Fu to put tremendous potential of application on the ice.
Graph compound film of Xi of 3 black lead and deice experiment
Graph Xi of 4 black lead / the joule with compound and filmy epoxy resin heats Fu of the air defence that reach boat puts application on the ice
