Sichuan university Wu Kai's deputy researcher / Professor Fu JiangInAdvanced Materials(IF:32.086) research paper “ was published on periodicalTropocollagen Inspired Hierarchical Spiral Structure Of Organic Fibers In Epoxy Bulk For Three-dimensioNal High Thermal Conductivity” , The “ epoxy resin that reported one kind suffers structure of collagen albumen helix to inspire / get together to maintain benzene to benzene and fiber of 2 evil Zun (PBO) piece material ” , first time of this kind of completely organic material realized the tall coefficient of thermal conductivity of above of 7 W/m K at the same time in the direction inside the knead dough outside the face, came true in domain of composite material of three-dimensional heat conduction new span, used theoretical model to discuss interior of heat conduction material to guide heat engine manages further. InstituteChen Xin of Master graduate student is a paper the first author; Wu Kai's deputy researcher and Professor Fu Jiang are paper newsletter writer; Unit of the first writer is Sichuan university.
Polymer because the undesirable conductor that the random structure of interior was considered as to heat up in the past. But consider to discover in recent years, the film of a few orientaton and fiber can realize extremely tall heat conduction; At present the hot carriage mechanism to polymer of tall heat conduction pays close attention to a dot to be centered at crystal mostly / the orientaton of the part that be not brilliant, viewpoint relatively not perfect, need to farther experiment is propped up and add up to manage explanation. In addition, the treatment that adopts a convention / preparation method, people is returned not the heat conduction property of direction of this kind of low dimension extends completely will organic polymer effectively to whole three dimensional space, the treatment with urgent in applying actually new need / preparation method realizes three-dimensional direction tall heat conduction.
Be aimed at afore-mentioned problems, groupBe inspired by structure of collagen albumen helix, the kind that carries from bottom to top got a kind of epoxy resin / get together to maintain benzene to benzene and fiber of 2 evil Zun (PBO) piece material, special helix structure offerred the heat conduction heft of length direction and radial direction for individual fasciculus unit, and braid a structure to succeed further the property of tall heat conduction of low dimension direction extended ground general macromolecule whole three dimensional space.
At the same time imitate of kinetic, phonon mixes article union member classical nonlinear heat conduction model, respectively from molecular catenary structure, collect state structure, and the many sides such as microcosmic and complex structure are right the heat conduction mechanism of material undertook an analysis, put forward: PBO brilliant area and mode of vibration of amorphous area phonon are adjacent, because this is amorphous,the successive compose elephant of catenary resembles area macromolecule hot bridge is same the brilliant area series connection photograph adjacent rises, the phonon scattering that is in in brilliant area and amorphous area interface is almost negligible. This explained possibly also why the phonon inside polymer is average and free Cheng Yuan is big size of Yu Jijing area, why the PBO that computation of classical one dimension model gets is not brilliant area is high heat conduction.
Besides, material of this completely organic heat conduction still was shown light qualitative, excel in, insulation is appeared wave, can curve fold arbitrarily, do not light wait for character. In future, this kind of material and its preparation method will be organic polymer to manage applied respect to create brand-new implementation method in high-powered heat likely, also can guide to edify a few electric conduction further the preparation of material of screen of electromagnetism of hot, heat conduction is offerred draw lessons from (if use successive carbon base fiber) .