文献类型：期刊文献

英文题名：Bioinspired chiral cellulose nanocrystal photonic films for rapid visual ethanol adulteration detection

作者：Dai, Miaoqi[1,2];Chen, Qing[1,2];Zhou, Ruizi[1,2];Simal-Gandara, Jesus[3];Teng, Hui[1,2];Chen, Lei[1,2]

机构：[1]Guangdong Ocean Univ, Key Lab Adv Proc Aquat Prod Guangdong Higher Educ, Coll Food Sci & Technol,Guangdong Prov Key Lab Aqu, Guangdong Prov Engn Technol Res Ctr Seafood, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Shenzhen Inst, Shenzhen 518108, Peoples R China;[3]Univ Vigo, Fac Sci, Analyt Chem & Food Sci Dept, Nutr & Bromatol Grp, Orense 32004, Spain

年份：2026

卷号：529

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：SCI-EXPANDED(收录号：WOS:001677972000001)、、EI(收录号：20260519976411)、Scopus(收录号：2-s2.0-105028359812)、WOS

基金：This work is supported by the National Natural Science Foundation of China (32372335) , Guangdong Basic and Applied Basic Research Foundation (2024B1515020110) , the Shenzhen (JCYJ20240813111713018) and Key Field Project Supported by Educational Commission of Guangdong Province (Biological Medicine and Health) (2022ZDZX2028) .

语种：英文

外文关键词：Chiral nematic cellulose nanocrystal; Ethanol adulteration detection; Maltodextrin; Humidity-responsive photonic film; Rapid visual detection

外文摘要：Tackling the challenge of detecting aqueous adulteration in ethanol beverages, flexible cellulose nanocrystalmaltodextrin (CNC-MD) photonic films were engineered via evaporation-induced self-assembly (EISA). MD (0-25 wt%) selectively occupies non-crystalline regions in CNC matrices, as confirmed by FTIR, XRD and SAXS analyses. This structural integration expands the chiral nematic helical pitch from 269 nm (pure CNC) to 357 nm (25% MD), inducing a 104 nm redshift in Bragg reflection peak (from 419 nm to 523 nm) with chromatic transitions from violet-blue to green. Mechanically, tensile strength increased by 111% (39.02 MPa at 10% MD) and elongation by 125% (0.54% at 25% MD), overcoming the brittleness of pristine CNC films. The 25% MD composite demonstrated humidity-triggered reversibility over 7 hydration-dehydration cycles between 30% and 100% RH, along with aqueous adulteration detection in ethanol exhibiting 11.8 nm/% sensitivity (Delta lambda t = 202 nm at 20% water; R2 = 0.98), outperforming pure CNC films that structurally collapsed above 4% water exposure. Nonlinear CIE chromaticity shifts to russet at coordinates 0.55, 0.45 provided complementary visual verification. This MD-mediated restructuring concurrently enhances optical and mechanical properties, enabling fielddeployable photonic sensors for counterfeit alcohol authentication.