{"title":"Dynamic borate ester bonds mediated patterned anisotropic hydrogels for information encryption","authors":"Zengbin Song, Zhaodi Yi, Mingrui Wu, Ming He","doi":"10.1016/j.polymer.2024.127952","DOIUrl":null,"url":null,"abstract":"Hydrogels with oriented structures exhibit birefringence and display different interference colors between crossed polarizers, which has attracted increasing attention in the fields of information encryption. However, it remains a challenge to introduce complex anisotropic microstructures into hydrogels and enabling them to display high-resolution interference patterns with erasable and rewritable properties. In this study, we report a uniaxially oriented anisotropic polyvinyl alcohol (PVA) hydrogel mediated by dynamic borate ester bonds. Different high-resolution interference patterns can be written or transfer-printed quickly by disrupting the localized PVA-B(OH)<sub>4</sub><sup>−</sup>complex structures with HCl solution. The reversible formation and dissociation of the PVA-B(OH)<sub>4</sub><sup>−</sup> complex structures allow the interference pattern to be repeatedly erased and rewritten. The excellent stability of the crystalline domains of PVA confers the ability for reversible transformation between hydrogel and dry film states without compromising the accuracy and reliability of the pattern information. The created dry film with a fingerprint pattern can be used to assemble an unforgeable card, which can instantly display a fingerprint pattern in front of a cell phone screen. Double encryption of the patterned information was achieved by drying the patterned hydrogel into a curly shape and utilizing its three-dimensional structure to increase the security of the information.","PeriodicalId":405,"journal":{"name":"Polymer","volume":"28 1","pages":""},"PeriodicalIF":4.1000,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1016/j.polymer.2024.127952","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
Hydrogels with oriented structures exhibit birefringence and display different interference colors between crossed polarizers, which has attracted increasing attention in the fields of information encryption. However, it remains a challenge to introduce complex anisotropic microstructures into hydrogels and enabling them to display high-resolution interference patterns with erasable and rewritable properties. In this study, we report a uniaxially oriented anisotropic polyvinyl alcohol (PVA) hydrogel mediated by dynamic borate ester bonds. Different high-resolution interference patterns can be written or transfer-printed quickly by disrupting the localized PVA-B(OH)4−complex structures with HCl solution. The reversible formation and dissociation of the PVA-B(OH)4− complex structures allow the interference pattern to be repeatedly erased and rewritten. The excellent stability of the crystalline domains of PVA confers the ability for reversible transformation between hydrogel and dry film states without compromising the accuracy and reliability of the pattern information. The created dry film with a fingerprint pattern can be used to assemble an unforgeable card, which can instantly display a fingerprint pattern in front of a cell phone screen. Double encryption of the patterned information was achieved by drying the patterned hydrogel into a curly shape and utilizing its three-dimensional structure to increase the security of the information.
期刊介绍:
Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics.
The main scope is covered but not limited to the following core areas:
Polymer Materials
Nanocomposites and hybrid nanomaterials
Polymer blends, films, fibres, networks and porous materials
Physical Characterization
Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films
Polymer Engineering
Advanced multiscale processing methods
Polymer Synthesis, Modification and Self-assembly
Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization
Technological Applications
Polymers for energy generation and storage
Polymer membranes for separation technology
Polymers for opto- and microelectronics.