Colophony charcoal has good mechanical, electricity and hot physics property, it is the data of structural function unifinication that uses extensively at the domain such as aviation, spaceflight, the sources of energy. Colophony regards the important van of charcoal material as one of body, have superior mechanical performance, corrosion resistance to be able to be mixed can machine complex model the advantage such as component part, apply extensively at heat conduction / electric composite material, flame retardant the engineering field such as material, electromagnetism screen material. According to the maneuverability of the performance demand of material and preparation craft, choose appropriate colophony, even but a variety of colophony answer deserve to use. Catenary of general resinous element longer, compliance is better, make twine each other in catenary of the element below influence of molecular intercrop emphatic. In addition, more C-H key is contained in colophony, bring about colophony to be when char dehydrogenation is more difficult, restricted colophony charcoal to be black lead structure in the recomposition below high temperature, bring about colophony charcoal then hard graphitization. And closely related the degree of graphitization of charcoal material and its function, for example electric, heat conduction, fight oxidation and mechanical function to wait to have very big concern with degree of graphitization, different application has diverse demand to the degree of graphitization of charcoal material. In conductivity respect, with the black lead negative pole at 2 batteries and electric double layer super capacitor all needs taller degree of graphitization, heat conduction material also needs to taller degree of graphitization will finish phonon heat to conduct, fight oxidation charcoal / the degree of graphitization with composite material taller need reduces charcoal blemish of black lead crystal; In mechanical performance side, degree of graphitization is exorbitant the intensity that may reduce material. Accordingly, the graphitization of colophony charcoal is very important foundation sex study a task.
Graph 1 picture summary
Recently, group of Professor Li Tiehu is in northwest industry university " new-style charcoal material (Chinese and English) " on the graphitization that published a problem to be charcoal of “ modified resin and the overview article that use progress ” , the key summed up the research progress that in recent years graphitization of modified resin charcoal reachs application, the system introduced Chinese ink of material of rice of accept of activator, carbon, Yi Shi to change in all char agent modifier of 3 kinds of colophony, the graphitization charcoal content that can raise colophony charcoal drops its graphitization temperature. Activator modifier can make below inferior temperature the degree of graphitization of colophony charcoal is amounted to 74% , and modifier of material of carbolic accept rice needs to be in more apparent land enhances ability of above of 2000 ℃ the degree of graphitization of colophony charcoal. Before be being compared two kinds of modifier, of easy graphitization in all the degree of graphitization that char modifier can raise colophony charcoal not only, still can raise rate of resinous incomplete charcoal. Using a field, the degree of graphitization that raises colophony charcoal can raise charcoal / charcoal the heat conduction of composite material and electric function, the electric performance that also can improve super capacitor material and data of 2 batteries electrode, fold function and power density. Finally, the graphitization that discussed modified resin charcoal reachs the challenge that application faces and development direction.
Graph 2 (A) coal tar pitch is mixed body of drive of the body before colophony is a shape phenolic aldehyde synthesizes craft of poriferous charcoal preparation, (B) the TEM photograph after char of colophony of phenolic aldehyde of modified of coal tar pitch, after the char of colophony of phenolic aldehyde of modified of coal tar pitch of different quality mark (C) XRD and (D)Raman spectrogram
Be aimed at the graphitization of charcoal of activator modified resin, already had to the activator of onefold constituent at present relatively traverse, and cross metal, B and other activator to passing cooperate with catalytic research is less, for instance alloy still remains to study deep further as activator. The problem such as the size control of the dispersive sex in colophony, activator also is worth activator to be discussed deep. In the graphitization mechanism respect of charcoal of modified resin of material of carbolic accept rice, follow-up research can pay close attention to material of carbolic accept rice to disperse in the uniformity in colophony problem, and function of the mechanical, electric conduction of charcoal of modified resin of material of carbolic accept rice, heat conduction. Finally, to in all the graphitization research of modified resin charcoal centers char agent at soft charcoal of different type bitumen more the structural adjusting control of hard to different colophony charcoal. In addition, still need to study different colophony and bitumen deep in all the modified mechanism of char, also can consider to have method of these 3 kinds of modified cooperating with coupling, raise the goal of function of colophony charcoal graphitization integratedly in order to achieve. To the applied research of the graphitization of modified resin charcoal and modified resin charcoal, on the foundation that pays close attention to adjusting control of charcoal material composition, but material mechanical wait for other property and project application to consider integratedly. Be based on the fundamental content sex of raw material, design practical preparation technology, mix according to the composition of material function, focusing the structural adjusting control at material, the unifinication of function of the preparation that realizes material of modified resin charcoal thereby, structure, graphitization and project application optimizes a target.
NeW Carbon MaterialsArticle message
Yang Ping army, li Tiehu, li Hao, dang Alei, yuan Lei. The graphitization of modified resin charcoal and application make progress. New-style charcoal material (Chinese and English) , 2023, 38(1) : 96-110.
YANG Ping-jun, LI Tie-hu, LI Hao, DANG A-lei, YUAN Lei. Progress In The Graphitization And Applications Of Modified Resin Carbons. New Carbon Mater. , 2023, 38(1) : 96-110.
