Formation mechanism of zigzag patterned P(NIPAM-<i>co</i>-AA)/CuS composite microspheres by <i>in situ</i> biomimetic mineralization for morphology modulation

Yang, Juxiang; Li, Wei; Jia, Yuan; Li, Pengna

doi:10.1039/d1ra04872d

Cited by 3 publications

(5 citation statements)

References 43 publications

(65 reference statements)

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“…According to reports, the concentration of acetone plays a crucial role in determining the formation of wrinkling patterns on the GMs. 40 3.2. Characterization of Microneedle Patches.…”

Section: Resultsmentioning

confidence: 99%

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Effect of Microsphere Concentration on Catechin Release from Microneedle Arrays

Sabbagh,

Deshmukh,

Choi

et al. 2024

ACS Appl. Mater. Interfaces

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In this work, microspheres were developed by crosslinking glutaraldehyde in an aqueous gelatin solution with a surfactant and solvent. A poly(vinyl alcohol) (PVA) solution was produced and combined with catechin-loaded microspheres. Different microsphere concentrations (0%, 5%, 10%, and 15%) were applied to the PVA microneedles. The moisture content, particle size, swelling, and drug release percentage of microneedles were studied using various microsphere concentrations. Fourier transform infrared and scanning electron microscopy (SEM) investigations validated the structure of gelatin microspheres as well as their decoration in microneedles. The SEM scans revealed that spherical microspheres with a wrinkled and folded morphology were created, with no physical holes visible on the surface. The gelatin microspheres generated had a mean particle size of 20−30 μm. Ex vivo release analysis indicated that microneedles containing 10% microspheres released the most catechin, with 42.9% at 12 h and 84.4% at 24 h.

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“…According to reports, the concentration of acetone plays a crucial role in determining the formation of wrinkling patterns on the GMs. 40 3.2. Characterization of Microneedle Patches.…”

Section: Resultsmentioning

confidence: 99%

“…The enlarged SEM image clearly illustrates that the GM surfaces exhibit a large surface area with a uniform zigzag pattern. According to reports, the concentration of acetone plays a crucial role in determining the formation of wrinkling patterns on the GMs …”

Section: Resultsmentioning

confidence: 99%

Effect of Microsphere Concentration on Catechin Release from Microneedle Arrays

Sabbagh,

Deshmukh,

Choi

et al. 2024

ACS Appl. Mater. Interfaces

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“…Another interesting example was reported by Yang et al [ 59 ], who synthesized poly(N-isopropylacrylamide-co-acrylic acid)/copper sulfide (P(NIPAM-co-AA)/CuS) composite microspheres which presented wrinkled zigzag surfaces formed through the in situ biomimetic mineralization reaction between H 2 S and Cu +2 ( Figure 12 a). The main objective is to generate wrinkled patterns on a hydrogel film by deposition of a sulfide on the surface, where the amount deposited and the distribution of the sulfide affect the surface morphology obtained by forming these patterns.…”

Section: Desing Of Adaptive Wrinkled Patterned Surfaces: Reversible S...mentioning

confidence: 92%

“…Firstly, reversible stimuli-responsive wrinkled patterns were formed using smart polymers that can respond to external stimuli and actively react to environmental changes. In this section, materials that can react to stimuli were reviewed, the most common being light stimuli-responsive materials such as the one reported by Omenneto et al [ 40 ] or Jiang et al [ 43 ]; also, changes in environmental pH were reviewed, as in the case of Yang et al [ 59 ], or temperature stimuli-responsive materials as in the case of Zhang and Sun et al [ 60 ]. Other types of stimuli were also reviewed, such as changes in electric/magnetic fields or changes in environmental humidity and even reactions to mechanical stimuli such as stretching or compression.…”

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

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Smart Polymer Surfaces with Complex Wrinkled Patterns: Reversible, Non-Planar, Gradient, and Hierarchical Structures

et al. 2023

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This review summarizes the relevant developments in preparing wrinkled structures with variable characteristics. These include the formation of smart interfaces with reversible wrinkle formation, the construction of wrinkles in non-planar supports, or, more interestingly, the development of complex hierarchically structured wrinkled patterns. Smart wrinkled surfaces obtained using light-responsive, pH-responsive, temperature-responsive, and electromagnetic-responsive polymers are thoroughly described. These systems control the formation of wrinkles in particular surface positions and the reversible construction of planar-wrinkled surfaces. This know-how of non-planar substrates has been recently extended to other structures, thus forming wrinkled patterns on solid, hollow spheres, cylinders, and cylindrical tubes. Finally, this bibliographic analysis also presents some illustrative examples of the potential of wrinkle formation to create more complex patterns, including gradient structures and hierarchically multiscale-ordered wrinkles. The orientation and the wrinkle characteristics (amplitude and period) can also be modulated according to the requested application.

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Two-Dimensional Nanomaterials in Hydrogels and Their Potential Bio-Applications

Wang,

Guo,

Zhang

et al. 2024

Lubricants

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Hydrogels with high hydrophilicity and excellent biocompatibility have been considered as potential candidates for various applications, including biomimetics, sensors and wearable devices. However, their high water content will lead to poor load-bearing and high friction. Currently, two-dimensional (2D) materials have been widely investigated as promising nanofillers to improve the mechanical and lubrication performances of hydrogels because of their unique physical–chemical properties. On one hand, 2D materials can participate in the cross-linking of hydrogels, leading to enhanced load-bearing capacity and fatigue resistance, etc.; on the other hand, using 2D materials as nanofillers also brings unique biomedical properties. The combination of hydrogels and 2D materials shows bright prospects for bioapplications. This review focusses on the recent development of high-strength and low-friction hydrogels with the addition of 2D nanomaterials. Functional properties and the underlying mechanisms of 2D nanomaterials are firstly overviewed. Subsequently, the mechanical and friction properties of hydrogels with 2D nanomaterials including graphene oxide, black phosphorus, MXenes, boron nitride, and others are summarized in detail. Finally, the current challenges and potential applications of using 2D nanomaterials in hydrogel, as well as future research, are also discussed.

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Formation mechanism of zigzag patterned P(NIPAM-co-AA)/CuS composite microspheres by in situ biomimetic mineralization for morphology modulation

Abstract: P(NIPAM-co-AA)/CuS composite microspheres with zigzag patterned surfaces were synthesized, and a mechanism for “the deformed shrinkage of the surface texture” was proposed. The surface morphology is sensitive to factors such as Ksp, pH, temperature, deposition amount, etc.

Cited by 3 publications

References 43 publications

Effect of Microsphere Concentration on Catechin Release from Microneedle Arrays

Effect of Microsphere Concentration on Catechin Release from Microneedle Arrays

Smart Polymer Surfaces with Complex Wrinkled Patterns: Reversible, Non-Planar, Gradient, and Hierarchical Structures

Two-Dimensional Nanomaterials in Hydrogels and Their Potential Bio-Applications

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