Fabrication of sandwich-structured cellulose composite membranes for switchable infrared radiation
- 93 Downloads
Developing a feasible and efficient biomass-based membrane for energy-saving applications is critical for addressing greenhouse effect and energy crises. Herein, a sandwich-structured cellulose composite membrane with controllable thermal management properties was fabricated via the assembly of Ag nanoparticles/cellulose (ANPs/C), ultralong MnO2 nanowires (UMNWs), and MnO2 nanosheets/cellulose (MNSs/C). In this strategy, the UMNWs as building blocks were prepared by hydrothermal method. Then, the ANPs/C and MNSs/C were fabricated via magnetron sputtering and in situ growth method, respectively. Finally, the cellulose composite membrane (CCM) was fabricated via vacuum-filtration of cotton cellulose (CC), UMNWs and MNSs/C suspension, and subsequently the CC surfaces were covered with the ANPs by magnetron sputtering. The sandwich-structured CCM exhibits Janus infrared radiation properties due the asymmetrical surface structure and chemical compositions. The ANPs layer has high infrared reflectivity of 91.6%, however, the MNSs/C layer shows the low infrared reflectivity with 62.7%. The results indicate that the Janus sandwich CCM not only can efficiently reflect infrared heat back toward the body, in order to achieve highly thermal insulating under low temperature environment, but also can achieve highly passive cooling under high temperature environment. In addition, the CCM exhibits excellent antibacterial properties due to presence of ANPs, which is beneficial to enhance the lifespan of the personal thermal management membrane. The present work may give some insight to prepare sandwich-structured membranes with controllable thermal management properties for application in wearable textiles.
KeywordsCellulose membrane Thermal management Thermal insulating Passive cooling Antibacterial properties
This work was financially supported by National Natural Science Foundation of China (21706100 and 21878132), Natural Science Foundation of Jiangsu Province (BK20160500, BK20161362 and BK20160491), State Key Laboratory of Pollution Control and Resource Reuse Foundation (No. PCRRF18003), Scientific Research Foundation for Advanced Talents, Jiangsu University (15JDG142), Youth Talent Cultivation Program of Jiangsu University, High-Level Personnel Training Project of Jiangsu Province (BRA2016142), Natural Science Foundation of Hebei Province (B2019108017) and Society Development Fund of Zhenjiang (SH2018009).
- Chen C, Ma T, Shang Y, Gao B, Jin B, Dan H, Li Q, Yue Q, Li Y, Wang Y, Xu X (2019) In-situ pyrolysis of Enteromorpha as carbocatalyst for catalytic removal of organic contaminants: considering the intrinsic N/Fe in Enteromorpha and non-radical reaction. Appl. Catal B 250:382–395CrossRefGoogle Scholar
- Percec V, Wilson DA, Leowanawat P, Wilson CJ, Hughes AD, Kaucher MS, Hammer DA, Levine DH, Kim AJ, Bates FS, Davis KP, Lodge TP, Klein ML, DeVane RH, Aqad E, Rosen BM, Argintaru AO, Sienkowska MJ, Rissanen K, Nummelin S, Ropponen J (2010) Self-assembly of Janus dendrimers into uniform dendrimersomes and other complex architectures. Science 328:1009–1014CrossRefGoogle Scholar