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Open research questions in Collagen: Extraction and Characterization

142 gap statements mined from Collagen: Extraction and Characterization papers in our 4.5M-paper local library, which holds 676 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • The conventional leather manufacturing process has a high environmental impact. There is a need for a sustainable materials approach for leather production. The effects of various vegetable tannin combinations on the physical and color properties of sole leathers are not well understood.

    Balancing Color Stability and Mechanical Performance in Sole Leather: A Sustainable Materials Approach Using Vegetable Tannin Formulations · 2026 · DOI

  • The paper identifies the need for a biomaterial that addresses the limitations of animal-derived collagens, such as immunogenicity and the risk of zoonotic diseases. There is a gap in the development of biomaterials for various medical applications, including wound healing, tissue repair, and regenerative therapies.

    Advancements in Clinical Utilization of Recombinant Human Collagen: An Extensive Review · 2025 · DOI

  • The study did not investigate the long-term effects of the hydrogels. The study only tested the hydrogels against a limited number of microorganisms. The study used a specific type of grape skin extract, which may not be representative of all grape skin extracts.

    Development and Optimization of Grape Skin Extract-Loaded Gelatin–Alginate Hydrogels: Assessment of Antioxidant and Antimicrobial Properties · 2025 · DOI

  • The lack of advanced biomaterials that surpass the limitations of conventional dressings for wound care. The need for hydrogels with tailored mechanical integrity, degradation kinetics, and precise drug release profiles. The potential of grape skin extract as a sustainable and eco-friendly ingredient for wound healing applications.

    Development and Optimization of Grape Skin Extract-Loaded Gelatin–Alginate Hydrogels: Assessment of Antioxidant and Antimicrobial Properties · 2025 · DOI

  • Lack of understanding of the inhibitory effect of collagen peptides on melanogenesis. Limited research on the use of collagen peptides in dermatology and skincare products.

    The Inhibitory Effect of Peptide Hydrolysate of Type I Collagen Derived from Pig Skin on Melanogenesis in B16F10 Melanoma Cells · 2025 · DOI

  • One challenge is the poor gelling ability of fish gelatin, which limits its applications. Another challenge is the need to understand the effects of furcellaran on the structural and physicochemical properties of fish gelatin gels. The study also faced the challenge of optimizing the substitution level of furcellaran to achieve improved gelling properties.

    Modulating Fish Gelatin Gelling Properties Through Furcellaran Addition: A Structural and Physicochemical Analysis · 2025 · DOI

  • It also mentions the need to understand the interactions between chitosan and squid gelatin. The study notes the importance of evaluating the antioxidant activity of the resulting hydrogels.

    Physical and Structural Properties of Chitosan–Squid Gelatin Hydrogels · 2025 · DOI

  • The lack of a comparative study between the porous matrices obtained from collagen extracted from different sources. The need to develop a method for producing collagen matrices from various sources for biomedical applications.

    Comparative Study of Collagen Gels Extracted from Different Sources · 2025 · DOI

  • The lack of a biocompatible and structurally robust scaffold for osteochondral tissue repair. The need for a cross-linking strategy that enhances the mechanical integrity of collagen hydrogels without compromising their biological functionality.

    Dialdehyde Starch Cross-Linked Collagen with Heparin Conjugation: Characterization and Feasibility Study for Osteochondral Tissue Repair · 2025 · DOI

  • The study highlights the need to balance the concentration of transglutaminase and epigallocatechin gallate to achieve the desired modifications.

    Effects of Transglutaminase and Epigallocatechin Gallate on the Structural and Physicochemical Properties of Fish Skin Gelatin from Takifugu rubripes · 2025 · DOI

  • The need for biopolymeric formulations that can overcome the limitations of vaginal drug delivery. The lack of understanding of the effects of gellan gum on the properties of collagen-HPMC hydrogels. The need for a comprehensive evaluation of the physicochemical and biocompatibility properties of biopolymeric formulations for intravaginal application.

    Effect of Gellan Gum on the Properties of Collagen-HPMC Freeze-Dried Hydrogels for Mucosal Administration · 2025 · DOI

  • Collagen composite aerogels lack competitive mechanical properties. Collagen composite aerogels lack sustained drug-release capability. Synthetic polymeric aerogels and inorganic aerogels have poor biodegradability.

    Collagen/Glutamate Composite Aerogels with Supramolecular Network Structures Fabricated by Regulating Self-Assembly Behavior for Drug Delivery System · 2025 · DOI

  • The interdependence of certain physiological phenomena occurring during pregnancy and parturition is not well understood. The process of placental attachment during placentation is poorly elucidated.

    The Significance of Selected Collagens and Their Connection with Relevant Extracellular Matrix Proteins in Bovine Early-Mid-Pregnancy and Parturition with and Without Retained Foetal Membranes · 2025 · DOI

  • Despite being the second most abundant collagen in human tissues after type I, its biological functions on various skin properties have not been thoroughly studied.

    Development of a highly effective recombinant protein from human collagen type III Alpha 1 (COL3A1) to enhance human skin cell functionality · 2024 · DOI

  • But high-throughput methods for the quantification of these biomarkers are still lacking.

    Using targeted proteomics-based detection of collagen propeptides to quantify fibrillar collagen biogenesis in vitro · 2024 · DOI

  • The lack of cost-effective methods for extracting biomaterials from pork bones. The need for alternative enzymes for extracting biomaterials from pork bones.

    Extraction and characterization of biomaterials from pork bones: a potential alternative of pineapple by-product extract for commercial proteases · 2026 · DOI

  • FG has limited applications due to poor gelling properties, low gel strength, and gelling temperature, - The study only evaluated the effects of FUR on the structural and physicochemical properties of FG gels, - The study did not investigate the effects of FUR on other types…

    Modulating Fish Gelatin Gelling Properties Through Furcellaran Addition: A Structural and Physicochemical Analysis · 2025 · DOI

  • Insufficient mechanical properties of gel-based materials - Limited long-term stability of gel-based materials - Challenges in scaling up gel-based materials for industrial production - Batch-to-batch variation and less durability of plant-based…

    Gel-Based Approaches to Vegan Leather: Opportunities and Challenges in Mimicking Leather Properties · 2025 · DOI

  • Extensive research is required to reinforce gel networks through incorporating high-strength fillers and nanoparticles - Research is needed to address the technical challenges and limitations of gel-based materials for leather production - Strategies for enhancing mechanical properties and developing sustainable, eco-friendly production processes need to be…

    Gel-Based Approaches to Vegan Leather: Opportunities and Challenges in Mimicking Leather Properties · 2025 · DOI

  • Different mixture proportions, as well as the search for further mechanical and antimicrobial properties, among others, are important and could be the basis for future…

    Physical and Structural Properties of Chitosan–Squid Gelatin Hydrogels · 2025 · DOI

  • Investigating the effects of other factors on collagen gel properties. Comparing the properties of collagen gels from different fish species. Examining the potential applications of fish collagen in biomedical research.

    Comparative Study of the Gel-Forming Ability of Type I Collagens Extracted from Different Organs and Fish Species · 2025 · DOI

  • Further research is needed to investigate the effects of vegetable tannin combinations on other types of leathers, - The economic and environmental impacts of the vegetable tannin combinations should be analyzed in detail, - The study of the long-term effects of the vegetable tannin combinations on the leathers…

    Balancing Color Stability and Mechanical Performance in Sole Leather: A Sustainable Materials Approach Using Vegetable Tannin Formulations · 2026 · DOI

  • Optimizing production processes, - Enhancing stability and bioactivity of formulations, - Conducting extensive research on recombinant human…

    Advancements in Clinical Utilization of Recombinant Human Collagen: An Extensive Review · 2025 · DOI

  • The optimization of the extraction conditions for pineapple by-product extract. The evaluation of the efficacy of pineapple by-product extract-extracted collagen and chondroitin sulfate in skin health and osteoarthritis treatment.

    Extraction and characterization of biomaterials from pork bones: a potential alternative of pineapple by-product extract for commercial proteases · 2026 · DOI

  • Investigating the effects of stiffness and integrin ligation on other cell types. Developing materials with tailored mechanical properties for tissue engineering applications. Studying the long-term effects of stiffness and integrin ligation on cell behavior.

    Impact of stiffness and cell-binding motif availability on the cell-specific response to collagen-based macromolecular materials. · 2026 · DOI

Most-cited papers in Collagen: Extraction and Characterization

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Open questions raised by papers listed on this page include: (1) There is a need for a sustainable materials approach for leather production (“Balancing Color Stability and Mechanical Performance in Sole Leather: A…”, 2026); (2) The lack of cost-effective methods for extracting biomaterials from pork bones (“Extraction and characterization of biomaterials from pork bones: a potential…”, 2026); (3) The lack of advanced biomaterials that surpass the limitations of conventional dressings for wound care (“Development and Optimization of Grape Skin Extract-Loaded Gelatin–Alginate…”, 2025); (4) Lack of understanding of the inhibitory effect of collagen peptides on melanogenesis (“The Inhibitory Effect of Peptide Hydrolysate of Type I Collagen Derived from…”, 2025); (5) The lack of a comparative study between the porous matrices obtained from collagen extracted from different sources (“Comparative Study of Collagen Gels Extracted from Different Sources”, 2025). 142 gap statements have been mined from Collagen: Extraction and Characterization papers in our 4.5M-paper local library, which holds 676 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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