File Name : fig. s1.tif

Caption : fig. s1 photo images of the self-assembly of dac-go with different concentration of go (0.01 wt%, 0.03 wt%, 0.05 wt%, 0.07 wt%, 0.1 wt%) before and after periodate oxidation.

File Name : fig. s2.tif

Caption : fig. s2 photo images of the cnf aerogel and dac aerogel when hydrated again after freeze-drying: (a) hydrated samples at the beginning; (b) hydrated samples after shaking.

File Name : fig. s3.tif

Caption : fig. s3 photo images of water solution with different concentration of go before (a) and after (b) periodate oxidation: a: 0.05 wt% go; b: 0.6 wt% go.

File Name : fig. s4.tif

Caption : fig. s4 stress–strain curves during 100 cycles of compression-releasing at a constant strain of 30%, showing the stress–strain curves of selected cycles (0th, 30th, 60th, 100th).

File Name : fig. s5.tif

Caption : fig. s5 xps spectra of dac-0.05go after amination: (a) n1s spectrum of dac-0.05go-cpei; (b) n1s spectrum of dac-0.05go@pei.

File Name : fig. s6.tif

Caption : fig. s6. the n<sub>2</sub> adsorption–desorption isotherms (a) and pore size distributions (b) of dac, dac-0.05go, dac-0.05go-cpei and dac-0.05go@pei. 

File Name : fig. s7.tif

Caption : fig. s7 co<sub>2</sub> amount adsorbed on dac-0.05go-cpei at 25 ℃ before conducting desorption test at 70 ℃ (a), 80 ℃ (b) and 90 ℃ (c).

File Name : fig. s8.tif

Caption : fig. s8 photo images of dac-cpei: (a) fresh sample; (b) regenerated sample after co<sub>2</sub> desorption at 70 °c.

File Name : fig. s9.tif

Caption : fig. s9 sem images of dac-0.05go-cpei: (a) fresh sample; (b) regenerated sample.