Function transformation of polymeric films through morphing of surface shapes

Lee, Hyemin; Seo, Yoon Ji; Kim, Jaekyoung; Bae, Myung Jun; Hwang, Seokhoon; Bae, Jung Gun; Lee, Won Bo; Yoon, Hyunsik

doi:10.1016/j.cej.2022.134665

Cited by 6 publications

(10 citation statements)

References 48 publications

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“…This preparation method avoids the use of toxic chemical reagents and allows the preparation of COS/SA/nM 2+ PDF with a controlled size and thickness. The pore sizes of nIon 2+ -COS/SA gel films were all small, and all films showed interconnected, uniform, fine pore structures with a certain degree of roughness [17]. Such a structure on the one hand gives COS/SA/nM 2+ PDF a higher specific surface area and water content.…”

Section: Preparation Mechanism Of Cos/sa/nm 2+ Pdfmentioning

confidence: 96%

Multifunctional Gel Films of Marine Polysaccharides Cross-Linked with Poly-Metal Ions for Wound Healing

et al. 2022

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The development of an efficient and convenient material to improve skin tissue regeneration is a major challenge in healthcare. Inspired by the theory of moist wound healing, portable chitooligosaccharide (COS)/sodium alginate (SA) dual-net gel films containing multiple metal ions were prepared by a casting and in -situ spray method, which can be used to significantly promote wound healing without the use of therapeutic drugs. A variety of divalent cations was introduced in this experiment to improve the advantages of each metal ion by forming metal ion chelates with COS. Moreover, the physicochemical properties and antioxidant properties of nIon2+-COS/SA gel films were systematically characterized and evaluated by in vitro experiments. The gel films showed good antibacterial activity against Gram-negative and Gram-positive bacteria. In addition, the gel films showed good cytocompatibility in cellular experiments, and the gel films with Zn2+ and Sr2+ addition significantly accelerated wound healing in whole skin defect model experiments. Therefore, this nIon2+-COS/SA gel film is an ideal candidate material for wound dressing.

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Section: Preparation Mechanism Of Cos/sa/nm 2+ Pdfmentioning

confidence: 96%

Multifunctional Gel Films of Marine Polysaccharides Cross-Linked with Poly-Metal Ions for Wound Healing

et al. 2022

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“…In this case, the angle between the substrate and liquid becomes a receding contact angle. Therefore, the boundary conditions are given by using eqn (8) and…”

Section: Architected Microfabrication Via Controlled Stretching Of Th...mentioning

confidence: 99%

“…For example, liquid droplets 2,3 or jets 4 that are partially constrained or completely unbounded from the substrate have been actively studied through a combination of liquid and substrate compositions; the resulting structures are extensively utilized in optical coding, 5 exible electronics, 6 and surface engineering. 7 On the other hand, template-based liquid morphing methods utilizing so templating, 8 transfer printing, 9 and particle replication in non-wetting templates (PRINT) 10 have been developed as derivatives of traditional so lithography for multifunctional materials. These methods can utilize the conning effect of the template to fabricate complex three-dimensional microstructures for anisotropic wetting 11,12 or shape-tunable functional microparticles for microswimmers, 13 biomedical delivery, 14 and diagnostic applications.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic wettability manipulation via capturing architected liquid bridge shapes

Kim

et al. 2023

J. Mater. Chem. A

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“…During UV crosslinking, the water molecules within the swollen hydrogels can be maintained because the water did not diffuse into the fluoro-prepolymer. [21] The detailed experimental procedure can be found in the Supporting Information (Figure S2, Supporting Information) and previous literature. [21] After double replication with polyurethane acrylate (PUA), we replicated the swollen shapes of hydrogel structures.…”

Section: Fabrication Of Prism Arrays With Laterally Buckled Edgesmentioning

confidence: 99%

“…Buckling phenomena have been used to fabricate micro-and nanoscale structures. [13][14][15][16][17][18][19][20][21][22] Bilayer systems, which have two layers with different moduli, have been well studied to produce periodic buckled structures by minimizing the total energy, such as the bending energy of thin-deposited films and the deformation energy of substrates. [13][14][15][16] Their applications include optical devices, microfluidic systems, and stretchable electronics.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of the Moiré Effect in Overlapped Optical Films by Lateral Buckling of Sharp Edges of Prism Arrays

Lee,

Heo,

et al. 2023

Advanced Optical Materials

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The moiré effect arises from the superposition of periodic structures with differences in periods or angles. Although the moiré effect can be exploited as an intriguing tool to fabricate complex metastructures, reduction of the moiré effect can be an important issue in display technology that uses many optical films with periodic patterns. Because of the superposition, dark and bright regions can be seen by the naked eye, which is a reason for the degradation of the visual quality. In this work, the lateral deformation of shape edges of prism films is harnessed to reduce the moiré effect. After the preparation of a microprism array with hydrogel materials, the hydrogel microprism array is swelled via penetration of water molecules into the hydrogel networks. Due to the compressive stress applied by volume expansion with confinement, only the sharp edges laterally buckle randomly. The swollen hydrogel prism array is replicated by photopolymerization, and prism arrays with laterally buckled edges are obtained. The randomized edges help reduce the moiré effect of the optical film when the prism array is overlapped with other periodic devices, such as other prism arrays or display devices consisting of microscale pixels, without a significant decrease in the optical performance.

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Function transformation of polymeric films through morphing of surface shapes

Cited by 6 publications

References 48 publications

Multifunctional Gel Films of Marine Polysaccharides Cross-Linked with Poly-Metal Ions for Wound Healing

Multifunctional Gel Films of Marine Polysaccharides Cross-Linked with Poly-Metal Ions for Wound Healing

Anisotropic wettability manipulation via capturing architected liquid bridge shapes

Mitigation of the Moiré Effect in Overlapped Optical Films by Lateral Buckling of Sharp Edges of Prism Arrays

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