Experimental study on the preparation and stability of water-based carbon black-collagen nanofluids
Due to their excellent photothermal conversion performance,nanofluids have become the research focus of new solar collector media.However,due to its poor stability and complex preparation process,it has not been promoted in practical applications.In this paper,carbon black-collagen nanofluids were prepared by a two-step method using deionized water as the base solution.The effects of material addition order,collagen type,ultrasound time,material ratio and solution pH on the stability of nanofluids were explored.The results showed that the stability could be improved by dispersing carbon black and then adding collagen when preparing water-based carbon black-collagen nanofluids.Porcine skin collagen was more suitable for the preparation of carbon black-collagen nanofluids.The nanofluids prepared by ultrasound for 45min,the carbon black collagen mass ratio of 1/20 and the pH of suspension of 6.5-7.5 had good stability.This research would contribute to the industrial application of water-based carbon black-collagen nanofluids in the field of solar photothermal conversion in the future.
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