4.7 Review

Recent advancements in wound management: Tailoring superwettable bio-interfaces

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Summary: In this study, skin-inspired multilayer Janus composite nanofibrous membranes were designed and prepared as wound dressings with superhydrophilicity and superhydrophobicity. The membranes were investigated for their wettability, morphology, in-vitro release, cytotoxicity, antimicrobial activity, and healing effect. Results from animal experiments and histological analysis demonstrated that the composite membranes were more effective in improving the healing of full-thickness defect wounds and promoting the growth of collagen fibers and collagen deposition. The composite membranes consisted of a drug-loading layer with a superhydrophilic surface for self-pumping and drugs backflow, a hydrophobic polyvinylidene fluoride layer for delaying exudates loss, and a superhydrophobic coating with self-cleaning properties for avoiding the adhesion of foreign microorganisms.

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Bio-inspired, bio-degradable adenosine 5'′-diphosphate-modified hyaluronic acid coordinated hydrophobic undecanal-modified chitosan for hemostasis and wound healing

Yihao Liu et al.

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Laser Ablated Janus Hydrogel Composite Membrane for Draining Excessive Blood and Biofluid around Wounds

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Summary: In this study, a hydrophobic/hydrophilic Janus hydrogel composite membrane (JHCM) is combined with a commercial band-aid to achieve efficient cleaning of biofluids on the wound surface. The JHCM can pump biofluids to the hydrophilic layer through the hydrophilic inner wall of conical micropores and hydrogel layer, while weakening undesired wet adhesion and heat loss. Compared to the commercial band-aid, the JHCM@ band-aid shows significantly better in vivo wound healing effects.

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Chenhui He et al.

Summary: The surface structure and topography of biomaterials are crucial for cell behaviors and wound healing. Inspired by the skin structure and super-hydrophobicity of lotus leaf, an asymmetric composite dressing was developed. It effectively prevents bacterial colonization and infection, promotes cell adhesion and migration, reduces inflammation, and accelerates wound healing.

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Yuan Li et al.

Summary: This study presents a novel biodegradable tissue adhesive composite that can effectively close wounds in fluid-rich and dynamic environments, preventing tear and infection. The composite consists of a gradient modulus micro-mesh and an oil-infused anti-adhesion surface, allowing rapid adhesion to wet tissue and gradual degradation without the need for patch retrieval.

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Superhydrophobic and superhydrophilic polyurethane sponge for wound healing

Shangliang Chen et al.

Summary: We successfully constructed an asymmetric superhydrophobic/superhydrophilic polyurethane sponge for wound healing. The sponge combines functions of preventing bacterial invasion and anti-fouling, moisture management and biocompatibility, while maintaining excellent breathability and comfort. It also showed superior bacterial barrier properties and promotion in wound healing.

CHEMICAL ENGINEERING JOURNAL (2022)

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Fabrication of antibacterial Janus bandages with high wound healing performances by facile single-side electrospray PDMS coating

Zhicheng Zhang et al.

Summary: In this study, an antibacterial bandage was developed using a facile electrospray method. The bandage exhibited excellent liquid moisture transport ability, air permeability, and sustained release of antibacterial substances, leading to enhanced wound healing.

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Yanyan Li et al.

Summary: The study introduces a nanozyme composite cryogel with interconnected macroporous structures to enhance antibacterial and biocompatible performance for biofluid management and wound infection therapy. The innovative design of CSG-M-x allows for intelligently adaptive trapping and killing of bacteria, making it a potential next-generation wound dressing for bacterial infection treatment in clinical settings.

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Multifunctional Photoactive Hydrogels for Wound Healing Acceleration

Aziz Maleki et al.

Summary: Light-based photothermal therapy (PTT) and photo-dynamic therapy (PDT) have great potential in wound healing and infection prevention. Multifunctional photoresponsive hydrogels (MPRHs) combining light and hydrogel advantages are increasingly used in biomedicine, particularly in wound repair. The modulation of bacterial microenvironments to inhibit infection through PTT, PDT, and photothermal/photodynamic synergistic therapy has been discussed.

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Microfluidic droplet templates derived porous patch with anisotropic wettability

Junjie Chi et al.

Summary: A novel Janus porous patch with anisotropic surface wettability was created from microfluidic droplet templates for wound healing, demonstrating efficient drainage of exudate and prevention of undesired tissue adhesion in a rat skin defect model. This study offers a promising strategy for the clinical treatment of skin wound diseases.

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Engineered Janus amphipathic polymeric fiber films with unidirectional drainage and anti-adhesion abilities to accelerate wound healing

Zheng Luo et al.

Summary: The rational design of new wound dressing materials aims to accelerate wound healing. The novel amphiphilic wound dressing nanofibrous materials with superhydrophilic/superhydrophobic features can effectively isolate wound exudate and prevent bacterial infection, thus promoting faster wound healing.

CHEMICAL ENGINEERING JOURNAL (2021)

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Asymmetric composite wound nanodressing with superhydrophilic/superhydrophobic alternate pattern for reducing blood loss and adhesion

Cai Long et al.

Summary: The asymmetric composite wound nanodressing (ACWN) with unique structure demonstrates significant hemostatic and anti-adhesion effects, showing promising potential for successful clinical application.

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Summary: Wound management is a major challenge globally, and smart wound dressings offer potential solutions for promoting wound healing. By employing built-in sensors and smart materials, smart wound dressings can interact with wounds, sense and respond to changes in wound conditions or environment.

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Functional Hydrogels as Wound Dressing to Enhance Wound Healing

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