Antistatic Structural Color and Photoluminescent Membranes from Co-assembling Cellulose Nanocrystals and Carbon Nanomaterials for Anti-counterfeiting  

作　　者：Si-Yuan Liu Yan-Bin Gong Shan Ma Yu-Huan Wang Lin Gan Jin Huang 

机构地区：[1]School of Chemistry and Chemical Engineering,Chongqing Key Laboratory of Soft:Matter Material Chemistry and Function Manufacturing,and"the Belt and Road(B&R)"International Joint Research Laboratory of Sustainable Materials,Southwest Universily,Chongqing 400715,China [2]Cllege ofChemistryand Molecular Science,Wuhan University,Wuhan 430072 China

出　　处：《Chinese Journal of Polymer Science》2020年第10期1061-1071,I0005,共12页高分子科学（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.51973175 and 51603171);the Project for Chongqing University Innovation Research Group(No.CXQT19008);the Chongqing Talent Plan for Innovation and Entrepreneurship Demonstration Team(No.CQYC201903243);the Key Laboratory of Polymeric Composite&Functional Materials of Ministry of Education(No.PCFM201605).

摘　　要：Static charges on optical ant-counterfeiting membranes may lead to materials structural changes,dust stain aggravation,and misreading of optical information.Incorporating conductive particles is a common way to transfer accumulative charges,but the key issue is how to achieve high dispersion and effective distribution of particles.According to the strategy of assembly-induced structural colors,cellulose nanocrystals(CNCS)were employed as a solid emulsifier to stabilize hydrophobic carbon nanoparticles(CNPs)in aqueous media;subsequently.by solvent evaporation-modulated co-assembly under a condition of 30°C and 20 RH%,the binary suspensions containing 2wt% CNC and CNPs with the equivalent concentration relative to CNC ranged from 1:40 to 1:10 were used to prepare antistatic composite membranes.Surface chemistry regulation of CNCs was applied to optimize the dispersiblity of CNPs and the orientation of assembled CNC arrays,and the hydrophilic CNCS were more favorable for dispersion and assembly of binary suspension systems.Meanwhile,one dimension carbon nanotube(CNT)and zero-dimension carbon black(CB)were found to show better dispersibility than two dimension graphene,which was verified by a semi-quantitative theoretical study.Moreover,the stable binary systems of CNT/CNC and CB/CNC were chosen for co-assembly as membranes,and the uniaxial orientation could be optimized as the fll-width of 9.8°at half maximum deviation angle while the surface resistivity could also drop down to 3.42 × 102 Qcmcm-1.The structural color character of such paper homology and antistatic integrated membranes contributes to optical information hiding and-reading,and shows great potential as optical mark recognition materials for electrostatic discharge protective packaging and anti.counterfeiting applications.

关 键 词：Cellulose nanocrystal Solid-state photoluminescent Carbon nanoparticles ANTISTATIC 

分 类 号：TB383.2[一般工业技术—材料科学与工程]