图1、 (a) Schematic diagram of the increase in the interlayer distance of the HOGF caused by expansion in acidic solution and (b) schematic diagram of the preparation process; (c) molecular synthesis reaction of polyimide.
图2、The thickness of the GP (a) before and (b) after expansion; (c) comparison of GP before and after expansion; (d)–(f) the morphology of the fracture surface of the HOGF with different expansion rates; (g) TEM image and (h) HR-TEM image of the HOGF, where the lattice plane corresponds to the (002) plane; (i) the corresponding diffraction spectrum of the graphite sheets; (j) XRD patterns and (k) Raman results of GP and the HOGF.
图3、 (a) SEM image of the HOGF/PI/CNTs-1 aerogel; (b)–(d) SEM images of OHPC-x; (e) and (f) XRD patterns of the composite aerogel before and after imination; (g)–(i) FT-IR spectra of the composite aerogel before and after imination and OHPC.
图4、For OD and OHPC, (a) DSC heating curves, (b) DSC cooling curves, (c) enthalpy values, and (d) loading rates; (e) DSC diagram of 100 heating and cooling cycles of OHPC-1; and (f) FT-IR spectra before and after cycling.
图5、(a) Melting points of OD and CPCMs; (b) leakage test images of OD and CPCMs; (c) TG and (d) DTG of OHPC.
图6、(a) In-plane and (b) through-plane thermal conductivity of OHPC; (c) finite element analysis of heat transfer in the (i) horizontal and (ii) vertical directions.