In order to solve the problems of low energy utilization rate and poor structural stability of photothermal conversion materials,a tightly arranged upper layer of nanotube array was constructed on the basis of graphene film by means of micro imprinting technology.Meanwhile,a porous aerogel base was formed by fixed-point dropping and multiple foaming.Thus,a graphene-based photothermal conversion material with integrated structure of light absorbing upper layer and heat insulating base was prepared.The results indicated that the light trap constructed from graphene hollow nanotubes could not only significantly increase the number of light reflections,but also reduce the light reflectivity.The length of the nanotubes was directly proportional to the light absorption ability of the material,which could increase the absorbance to over 98% under the imprinting conditions of 85kN and 8h.Besides,the combination of porous insulation base could effectively improve the photothermal conversion behavior and water evaporation effect of the material,and achieve 87% photothermal conversion efficiency and 1.3kg/(m2·h) water evaporation rate at the base thickness of 6mm.
Wang Suwei
,
Wang Chongyang
,
Qing Jiahao
,
Zong Huceng
,
Hao Gazi
,
Jiang Wei
. Heat transfer behavior of graphene-based photothermal conversion materials with tube array-porous network composite structure[J]. New Chemical Materials, 2025
, 53(5)
: 150
-154
.
DOI: 10.19817/j.cnki.issn1006-3536.2025.05.019
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