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<p>Nanocellulose (NC) derived from sustainable and eco-friendly sources, has garnered significant attention for its exceptional mechanical strength, UV-shielding capabilities, and antibacterial properties, making it a promising material for biomedical applications. Cow dung, a plentiful waste high in lignocellulosic fibers, offers an inexpensive, renewable, and under-utilized resource for the synthesis of nanocellulose. In line with the tenets of the circular economy, using cow dung increases waste valorization and enhances environmental sustainability while reducing dependency on traditional cellulose sources. This study explores the extraction and utilization of nanocellulose from cow dung to develop a novel 3D-printed biomaterial. The advanced 3D-printed composites were synthesized using a hybrid paste of cow dung-derived nanocellulose, sodium alginate, and chitosan. The developed composites exhibited outstanding performance in several key areas. The NB sample demonstrated superior UV shielding properties, with band gaps of NA = 4.51 eV and NB = 4.68 eV, as well as high mechanical strength (up to 35 MPa). The enhanced UV-blocking capability of NB was attributed to its higher nanocellulose content, which increased optical absorption in the 200–300 nm range, making it an excellent candidate for protective coatings in biomedical applications. Mechanical testing revealed that the NB sample exhibited the highest tensile strength, linked to improved interfacial bonding and the hierarchical nanostructure of the nanocellulose. Antibacterial properties, assessed through inhibition zones, showed NB (3 mm) &gt; NA(2 mm) &gt; pure nanocellulose (1 mm), indicating that the surface modifications and nanocellulose interactions contributed to enhanced bacterial resistance. This high mechanical strength, combined with inherent antibacterial properties, ensures both structural integrity and infection prevention. These promising characteristics position cow dung-derived nanocellulose as a potential material for advanced biomedical applications, including wound dressings, antimicrobial coatings, and tissue engineering.</p> Graphical Abstract <p></p>

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Advanced 3D-Printed Nanocellulose Composites from Cow Dung for UV Shielding and Antibacterial Applications in the Biomedical Sector

  • 期刊论文

  • 发表日期：

    2025年10月7日

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  • Kajal Yadav,
  • Amisha Sharma,
  • Naved Siraj,
  • Sarika Verma

摘要

Nanocellulose (NC) derived from sustainable and eco-friendly sources, has garnered significant attention for its exceptional mechanical strength, UV-shielding capabilities, and antibacterial properties, making it a promising material for biomedical applications. Cow dung, a plentiful waste high in lignocellulosic fibers, offers an inexpensive, renewable, and under-utilized resource for the synthesis of nanocellulose. In line with the tenets of the circular economy, using cow dung increases waste valorization and enhances environmental sustainability while reducing dependency on traditional cellulose sources. This study explores the extraction and utilization of nanocellulose from cow dung to develop a novel 3D-printed biomaterial. The advanced 3D-printed composites were synthesized using a hybrid paste of cow dung-derived nanocellulose, sodium alginate, and chitosan. The developed composites exhibited outstanding performance in several key areas. The NB sample demonstrated superior UV shielding properties, with band gaps of NA = 4.51 eV and NB = 4.68 eV, as well as high mechanical strength (up to 35 MPa). The enhanced UV-blocking capability of NB was attributed to its higher nanocellulose content, which increased optical absorption in the 200–300 nm range, making it an excellent candidate for protective coatings in biomedical applications. Mechanical testing revealed that the NB sample exhibited the highest tensile strength, linked to improved interfacial bonding and the hierarchical nanostructure of the nanocellulose. Antibacterial properties, assessed through inhibition zones, showed NB (3 mm) > NA(2 mm) > pure nanocellulose (1 mm), indicating that the surface modifications and nanocellulose interactions contributed to enhanced bacterial resistance. This high mechanical strength, combined with inherent antibacterial properties, ensures both structural integrity and infection prevention. These promising characteristics position cow dung-derived nanocellulose as a potential material for advanced biomedical applications, including wound dressings, antimicrobial coatings, and tissue engineering.

Graphical Abstract