Lu Shun,Xiao Chaohu,Tian Qi,Mu Xiaotong,Yu Jiale,Hasi Qimeige,Zhang Yuhan,Chen Lihua
Although photothermal materials (PMs) are widely utilized in pure water and seawater, there is less research on the design and preparation of multifunctional photothermal materials with organic dye adsorption and oil displacement properties. In this study, biomass carbon aerogel (BC) was prepared through a simple Ca 2+ cross-linking and freeze-drying process. To enhance the antifouling performance of BC, hydrophilic and oleophobic chemical modification was conducted to obtain BC-SP. The contact angle of n-hexadecane can reach to 141.8°, which enable the extensive application of BC-SP in oil-bearing wastewater treatment. Notably, BC-SP exhibited exceptional light absorption efficiency (approximately 95%), excellent heat insulation performance (thermal conductivity 0.0650 W m − 1 K − 1 ), and rapid water transport capability. Under the irradiation of 1 kW m − 2 , the solar energy conversion efficiency can reach to 86.8%. After tested eight cycles, the evaporation efficiency remained relatively stable and can adsorb most organic dyes in dye wastewater. Therefore, the study of BC-SP in this paper may has broad practical application prospects.
Excessive bleeding is the leading cause of death in accidents and operations. Ca 2+ crosslinked carboxyl nanocellulose (CN)/montmorillonite (MMT) composite (CaCNMMT) sponges were prepared by uniform mixing and directional freeze-drying methods which was inspired by the coordination mechanism of blood clot formation and coagulation cascade activation in natural hemostasis process. Carboxyl nanocellulose (CaCN) sponge has instantaneous water absorption capacity, and CaCNMMT sponges could further activate clotting factors. Therefore, CaCNMMT sponges achieved quick hemostasis by efficient concentrating blood, inducing hemocyte aggregation and stimulating coagulation cascade activation based on the synergistic effects of CN and MMT. Blood clotting index of CaCNMMT (15.90 ± 0.52 %) was significantly lower than CaCN (59.3 ± 1.43 %), and APTT time (22 ± 2 s) was almost equivalent to MMT (20 ± 2 s). CaCNMMT sponge showed good quick hemostatic effect on massive hemorrhage in both tail-breaking and liver injury model which provided a new strategy for the application of MMT in hemostatic and trauma treatment fields.
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