Self-evolving materials based on metastable-to-stable crystal transition of a polymorphic polyolefin

Yuan, Wenhua; Yu, Chengtao; Xu, Shanshan; Ni, Lingling; Xu, Wen‐Qing; Shan, Guorong; Bao, Yongzhong; Pan, Pengju

doi:10.1039/d1mh01691a

Cited by 7 publications

(8 citation statements)

References 25 publications

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“…Consequently, one can readily detect the transparency difference by naked eyes (Figure S4, Supporting Information), which is indispensable to code information based on the programming of crystal phases. [ 29 ]…”

Section: Resultsmentioning

confidence: 99%

Multi‐Level Information Encryption/Decryption of Fluorescent Hydrogels Based on Spatially Programmed Crystal Phases

Lan

Sun

et al. 2022

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The growing urgence of information protection promotes continuously the development of information‐encryption technique. To date, hydrogels have become an emerging candidate for advanced information‐encryption materials, because of their unique stimulus responsiveness. However, current methods to design multi‐level information‐encrypted hydrogels usually need sophisticated chemistry or experimental setup. Herein, a novel strategy is reported to fabricate hydrogels with multi‐level information encryption/decryption functions through spatially programming the polymorphic crystal phases. As homocrystalline and stereocomplex crystal phases in fluorescent hydrogels have different solvent stabilities, the transparency and fluorescence of the hydrogels can be regulated, thereby enabling the multi‐level encryption/decryption processes. Moreover, the structural origins behind these processes are discussed. It is believe that this work will inspire future research on developing advanced information‐encryption materials upon programming the polymer crystal structure.

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Section: Resultsmentioning

confidence: 99%

Multi‐Level Information Encryption/Decryption of Fluorescent Hydrogels Based on Spatially Programmed Crystal Phases

Lan

Sun

et al. 2022

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“…Due to the popularity of energy storage, [1][2][3] flexible electronics, [4][5][6][7][8] bionics, [9][10][11][12][13] and other fields, [14][15][16][17][18][19] the research on polymer dielectric elastomers has gradually become a trend in recent years. The two typical characteristics of polymer dielectric elastomers includes flexibility [20,21] and ultra-high dielectric constant to be driven by an electric field necessarily.…”

Section: Introductionmentioning

confidence: 99%

Phase‐Separated Dielectric Gels Based on Christiansen Effect

Gao

Chen

Zhang

et al. 2023

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Phase separation is a trivial phenomenon but a mature strategy in materials science. The flexible materials are provided toughness and strength by phase separation, yet there are few applications in optics and electronics industry. A novel phase‐separated dielectric gel (PSDG) with a strong Christiansen effect is prepared via radical polymerization using hydroxyethyl methacrylate as a monomer, 4‐cyano‐4′‐pentylbiphenyl and tributyl citrate as mixed solvents, and polyethylene glycol as a softener. The solvent ratios and ambient conditions can efficiently change the color of PSDG which makes it strongly selective for the wavelength of transmitted light. Besides, it has a high dielectric constant (10 at 1 kHz), sensitively responding to the electric field. The phase separation degree of PSDG varies with applied electric field, which will induce its transmittance alteration accordingly. The current field sensitive PSDG provides a novel idea for “smart windows”. Additionally, varying the size and shape of the electrodes can precisely control the phase separation in PSDG and also enables the function of free writing on flexible materials. Therefore, the designed PSDG has great application potential for flexible touch and interesting interactions.

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“…As one of the deformable materials, [ 14–16 ] shape memory hydrogels could provide programmable deformations because any pre‐coded shape could be fixed via hydrogen bonds, metal‐ligand coordination, host‐guest interactions, and boronate ester bonds, and provide corresponding deformation under the external stimuli such as pH, heat, and light. [ 17–19 ] Although, a few explorations of morphological information storage materials have been implemented, [ 20,21 ] the capacity of the encrypted information is still limited for the following reasons: Traditional shape memory hydrogels usually fix the preprogrammed shape which is encoded by external force and generate the shape deformation from a complex temporary shape to a simple original shape (Figure S1, Supporting Information). [ 22,23 ] Besides, the key mechanism of shape memory is the generation and breaking of dynamic temporary crosslinking points.…”

Section: Introductionmentioning

confidence: 99%

Programming Shape Memory Hydrogel to a Pre‐Encoded Static Deformation toward Hierarchical Morphological Information Encryption

et al. 2022

Adv Funct Materials

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Morphological information encryption such as gesture and sign language is a traditional but efficient way of information storage and communication. However, due to the limited deformability, almost all of the existing information encryption materials store and deliver information via the pattern or color changes on the 2D plane. Herein, a thermo and ion dual-responsive shape memory hydrogel containing short alkyl chains modified polyvinyl alcohol (PVA-C6) and polyacrylamide-co-polyacrylic acid [P(AAm-co-AAc)], is prepared. In this system, the ion-responsive shape memory process of P(AAm-co-AAc) provides the preprogrammed morphological information and actuating force while the thermo-responsive hydrophobic clusters of PVA-C6 are utilized as a molecular switch to control the deformed posture within the deformation process. Incorporated with a photothermal particle, Fe 3 O 4 , the photothermal PVA-C6 hydrogel is capable of generating diverse configurations that can be encoded as the corresponding information. With the assistance of the programmable NIR, the hydrogel can transfer to the encoded configuration and decrypt the information. Besides, the obtained morphological information can also be erased by immersing the hydrogel in hot water, in order to avoid the leakage of information. This study motivates the design and fabrication of deformable materials and provides a new insight into the information encrypt materials.

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Self-evolving materials based on metastable-to-stable crystal transition of a polymorphic polyolefin

Abstract: Living organisms can self-evolve with time in order to adapt to natural environment. Analogically, self-evolving materials also show similar properties based on a non-equilibrium structural transformation. The common design of...

Cited by 7 publications

References 25 publications

Multi‐Level Information Encryption/Decryption of Fluorescent Hydrogels Based on Spatially Programmed Crystal Phases

Multi‐Level Information Encryption/Decryption of Fluorescent Hydrogels Based on Spatially Programmed Crystal Phases

Phase‐Separated Dielectric Gels Based on Christiansen Effect

Programming Shape Memory Hydrogel to a Pre‐Encoded Static Deformation toward Hierarchical Morphological Information Encryption

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