Fabrication of micro and sub-micrometer wrinkled hydrogel surfaces through thermal and photocrosslinking processes

González‐Henríquez, Carmen M.; Sagredo-Oyarce, Dallits H.; Sarabia-Vallejos, Mauricio A.; Rodríguez‐Hernández, Juan

doi:10.1016/j.polymer.2016.08.051

Cited by 18 publications

(13 citation statements)

References 30 publications

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“…14 Alternatively, wrinkles have been obtained using rigid substrates. In this case, a thin material layer able to undergo a volume contraction 17,18 or to swell 19 produced outof-plane deformations as a result of the surface instabilities and finally produced a myriad of structures ranging from labyrinth surface patterns to peanuts. 20 Although it is true that few examples succeeded in the formation of wrinkled surfaces with variable chemical composition, the immobilization of hydrogels on solid inorganic surfaces but also on polymers (mainly thermoplastic) are rare.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Swelling and taking advantage of the inhibition of the radical polymerization due to the presence of oxygen occurring at the surface of the resin permitted the fabrication of a cross-linking gradient with depth. Another example was reported by Gonzalez-Henri ́quez et al 18 who designed a strategy that permitted the spontaneous formation of hydrogel wrinkled patterns on solid supports using a procedure that involves two separate steps, i.e., first a thermal prepolymerization and later an UV−vis exposure step. By spin coating homogeneous topographies were formed in which the wrinkle patterns were modulated through the variation of the molecular weight of the cross-linking agent.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Alternatively, wrinkles have been obtained using rigid substrates. In this case, a thin material layer able to undergo a volume contraction , or to swell produced out-of-plane deformations as a result of the surface instabilities and finally produced a myriad of structures ranging from labyrinth surface patterns to peanuts …”

Section: Introductionmentioning

confidence: 99%

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Wrinkled Hydrogel Surfaces with Modulated Surface Chemistry and Topography: Evaluation As Supports for Cell Growth and Transplant

Martínez-Campos

Gallardo

Luján

et al. 2019

ACS Appl. Bio Mater.

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We report a straightforward procedure to simultaneously functionalize hydrophobic PC supports with vinylpyrrolidone (VP)-based hydrogels with both variable ionic load as well as surface topography, forming wrinkles. The strategy involves three consecutive steps: first, a contact of the polymeric support (PC) with a photopolymerizable solution comprising vinylic monomers is established. Second, UV-light exposure curing of the solution and finally, the third step involes the swelling of the hydrogel network that finally provokes its surface detachment. Interestingly, a wrinkled hybrid PC/hydrogel interface remains after this detachment. Several experimental parameters permitted us to finely control the wrinkle characteristics such as amplitude and period. The experimental parameters that can be varied, herein we will focus on the variation of the elapsed time (i.e., time of contact between the support and the photosensitive monomer mixture, or the solvent (type and amount) included in the monomer mixture. Equally, the nature of the additional ionic methacrylate monomers (M) employed plays a key role on the final topography. According to confocal raman microscopy results, we evidenced that a monomer diffusion into the PC substrate before the UV irradiation step modifies the interfacial (hydrogel/substrate) chemical composition and leads upon UV irradiation to the formation of a thin hydrogel surface layer. The surface chemical composition and structural characteristics were demonstrated to significantly change the surface interaction with different cell lines, affecting cell adhesion, proliferation, or transplantation.

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Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Wrinkled Hydrogel Surfaces with Modulated Surface Chemistry and Topography: Evaluation As Supports for Cell Growth and Transplant

Martínez-Campos

Gallardo

Luján

et al. 2019

ACS Appl. Bio Mater.

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“…Additionally, the results suggest an aspect similar to ‘cracked mud’ in some samples, such as PALA‐Cu, PALV‐Cu, PALV‐Ag, PALPHA‐Ag and PALPHA‐Au. This morphology can be explained by spontaneous generation of surface instabilities that are related to the residual stress in the interface of the materials, producing either compressive or tensile behaviors leading to the formation of surface wrinkling, and subsequently surface cracking …”

Section: Resultsmentioning

confidence: 99%

“…Additionally, the results suggest an aspect similar to 'cracked mud' in some samples, such as PALA-Cu, PALV-Cu, PALV-Ag, PALPHA-Ag and PALPHA-Au. This morphology can be explained by spontaneous generation of surface instabilities that are related to the residual stress in the interface of the materials, producing either compressive or tensile behaviors leading to the formation of surface wrinkling, 43 and subsequently surface cracking. 44 To elucidate the effect of the particle diameter in relation to specific characteristics of the oligomer and to the atomic radius of each metal, it was necessary to generate histograms of the particle size ( Fig.…”

Section: Sem and Elemental Analysis Of Hybrid Materialsmentioning

confidence: 99%

A simple method to generate spontaneous chemisorption of metallic particles mediated by carboxylate groups from silylated oligomeric poly(amide‐imide)s

González‐Henríquez

Terraza

Cabrera

et al. 2017

Polymer International

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The present work describes oligomeric poly(amide‐imide)s (PAIs) containing several l‐amino acidic residues and two silicon atoms in their repeat unit, whose carboxylate terminal group was chemisorbed onto metallic particles (Cu, Ag or Au) previously deposited in controlled conditions via physical vapor deposition. Thus, for each prepared polymer–metallic hybrid, the surface morphology, particle size distribution, and percentage of organic material, silicon and metal were studied using scanning electron microscopy and energy‐dispersive X‐ray spectroscopy. The results show that the hybrids are formed probably via electrostatic interaction between the carboxylate anions of the PAIs and nanoparticle cations. This bridging ligand was visualized using Raman spectroscopy and corroborated with X‐ray diffraction. Optical studies and resistivity measurements (conductivity) of each hybrid were developed using UV‐visible and the four‐point probe method, respectively. X‐ray photoelectron spectroscopy was used to study the oxidation states of the metallic particles at surface level. Thus, a simple and spontaneous protocol is proposed for the preparation of metallic particles stabilized in situ by an oligomer, a procedure that takes place from seconds to a few minutes. Finally, particle diameters were measured using atomic force microscopy in order to study possible agglomeration of the metallic particles with time. © 2017 Society of Chemical Industry

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Polymerization‐Induced Wrinkled Surfaces with Controlled Topography as Slippery Surfaces for Colorado Potato Beetles

Bergmann

Moatsou

Surapaneni

et al. 2020

Adv Materials Inter

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Controlling the interaction of insect populations with their host plants has recently received renewed attention in the light of pest control. One way to modify the interaction of insects with their host plants in a non‐chemical way is through influence of their de/attachment. Insect detachment has been observed for textured biological and structured artificial surfaces with morphologies ranging from nano‐ to micrometers (0.3–1.5 µm). Here, the formation of design surfaces is investigated through plasma‐induced polymerization of acrylates. This produces pronounced surface wrinkles that are tunable by the manufacturing process. For certain parameters, the wrinkles resemble those of the adaxial side of rubber tree (Hevea brasiliensis) leaves, a natural example of particularly low friction. Traction force measurements on the bio‐inspired surfaces show significantly impacted insect attachment compared to flat surfaces of silica and polymeric materials, opening a pathway to the controlled manufacture of bio‐inspired slippery surfaces for insects that could potentially find use in advanced materials such as wall coatings.

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Fabrication of micro and sub-micrometer wrinkled hydrogel surfaces through thermal and photocrosslinking processes

Cited by 18 publications

References 30 publications

Wrinkled Hydrogel Surfaces with Modulated Surface Chemistry and Topography: Evaluation As Supports for Cell Growth and Transplant

Wrinkled Hydrogel Surfaces with Modulated Surface Chemistry and Topography: Evaluation As Supports for Cell Growth and Transplant

A simple method to generate spontaneous chemisorption of metallic particles mediated by carboxylate groups from silylated oligomeric poly(amide‐imide)s

Polymerization‐Induced Wrinkled Surfaces with Controlled Topography as Slippery Surfaces for Colorado Potato Beetles

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