Study setting and meaning
Epoxy resin (EP) has very superior integral performance, it is one of colophony of hot solid sex that show level to apply extensively. However, the brittleness of EP is big, appear piece not the defect of wear-resisting, make its are being sufferred chafe and wear away state, slide especially when dry attrition, incidental material invalidation and cause product loss.
Use accept rice material to undertake modified, can improve the tribology performance of EP significantly, but the effect of the accept rice material of different form appearance and structure is endless also and same, if material of rice of strong record offer can have certain ball effect, and material of rice of offer of state of 2 dimension layer basically promotes what transfer a layer to improve data in the attrition with attrition surface compact function to fight attrition and abrasiveness can. For this, this research design synthesized nickel of layer shape silicon acid (Ni-PS) rice of accept of wrap up carbon is in charge of (CNT) preparation the accept rice that has heterogeneous structure is miscellaneous the CNT@Ni-PS that change system, introduce rice of EP preparation accept composite material, the high-powered modified of the product that it is EP offerred new thinking.
Study content and main conclusion
Use Stöber craft preparation above all CNT surface load is many of ball of SiO2 accept rice miscellaneous change system (CNT@SiO2) , make below hydro-thermal condition CNT@SiO2 and Ni(II) ion react then, in CNT surface former form rice of many Ni-PS accept piece, get CNT@Ni-PS accept rice miscellaneous change system, introduce earning product EP matrix with different quality per cent then, preparation EP/CNT@Ni-PS composite material (graph 1) . On the foundation of detailed token CNT@Ni-PS, the compose effect that discussed complex system concerns, the influence rule of character of the introduces pair of EP/CNT@Ni-PS composite material attrition performance that basically studied CNT@Ni-PS, solidify and thermal stability. Basically got the following verdict:
(1) XRD, SEM, TEM and analyse of XPS divide into equal parts confirmed CNT surface formed many Ni-PS accept rice piece, got CNT@Ni-PS accept rice miscellaneous change system (graph 2) . FT-IR confirmed synthetic result further, TGA showed CNT@Ni-PS has good thermal stability in air (graph 3) ;
(2) CNT@Ni-PS can disperse in complex system good (graph 4) , can improve the tribology performance of EP/CNT@Ni-PS composite material apparently. In add a quantity to be 3% when, its are average coefficient of friction and wear extent lowest, it is respectively 0.361 with 3.68*10-5mm3/N·m, the look is simpler EP dropped respectively 21.4% and 47.6% (graph 5) ;
(3) DSC test shows, of CNT@Ni-PS introduce the solidify that promoted EP (graph 6) , reduced annulus oxygen - the solidify activation energy of amine system (graph 7) . TGA/DTG analysis makes clear, in air atmosphere, the thermal stability that CNT@Ni-PS can increase EP/CNT@Ni-PS composite material on certain level (graph 8) .
The preparation process sketch map of composite material of graph 1 EP
The XRD a collection of illustrative plates of graph 2 CNT, Ni-PS and CNT@Ni-PS (A) , the SEM photograph of CNT(b) , CNT@SiO2(c) and CNT@Ni-PS(d) , the TEM photograph of CNT@Ni-PS (E) and XPS chart pursue (F)
The FT-IR of graph 3CNT, CNT@SiO2 and CNT@Ni-PS pursues (A) and chart of TGA hot table (B)
Graph 4CNT@Ni-PS distributings mediumly in EP matrix and dispersive state: (A)0% , (B) 1% , (C) 3% , (D) 5% and (E) 7%
The function of slip dry tribology of graph 5EP/CNT@Ni-PS composite material (annulus piece type, 12kg, 1h)
The solidify of graph 6EP/CNT@Ni-PS composite material is characteristic
The solidify activation energy of graph 7EP/CNT@Ni-PS composite material plans to close (Kissinger law)
Graph 8EP/CNT@Ni-PS composite material is in the thermal stability in air atmosphere
Study window
Use classical Stöber method and preparation of union of hydro-thermal law photograph CNT@Ni-PS accept rice is miscellaneous change system, use long way to compare big CNT and 2 dimension piece the Ni-PS photograph of layer structure is united in wedlock, improved the attrition performance of EP/CNT@Ni-PS composite material apparently, realized material while anti-friction and wear-resisting modified; Still can promote annulus oxygen at the same time - the solidify of amine system, reduce solidify reaction activation energy, increased hear resistance.
Relevant achievement with “Synthesis Of Hierarchical Nanohybrid CNT@Ni-PS And Its Applications In Enhancing The Tribological, curing And Thermal Properties Of Epoxy Nanocomposites” is a problem, already published in FroOn Ntiers Of Chemical Science And Engineering (DOI:10.1007/s11705-020-2007-9) .
Author and group introduce
Yang Jinian (newsletter writer) , anhui manage is versed in university material institute is taught, basically pursue the applied basic research of material of rice of layer state offer and polymer attrition material, aim the structure of dug composite material and property concern, develop modifier of fill of low cost, high additional cost; Publishing SCI/EI domestic and internationally to collect a paper with the first author and newsletter writer more than 30, hold the position of ACS Appl. Mater. Interfaces, Cellulose, J.Polym. Environ. , Polym. Compost. Wait for reader of periodical of more than kinds of 10 learning.
