Scholarlink

<p>The chitosan/bacterial cellulose hydrogel film filled with nano-TiO<sub>2</sub> (denoted as TiO<sub>2</sub>/BC/CS) exhibiting intensive mechanical strength and sustained antibacterial performance was developed by blending a CS/TiO<sub>2</sub> dispersion with BC dissolved in a sodium hydroxide/urea solution. Results from FTIR, XRD, and SEM confirmed the establishment of robust interfacial interactions and good compatibility among BC, TiO<sub>2</sub>, and CS, confirming the successful fabrication of the ternary composite hydrogel film. Compared to the BC/CS film, the tensile strength (TS) of TiO<sub>2</sub>/BC/CS increased from 36.53&#xa0;MPa to 53.66&#xa0;MPa, and swelling capacity elevated from 68.43% to 85.24%. Conversely, the water solubility (WS) of the TiO<sub>2</sub>/BC/CS reduced from 19.57% to 16.56%, the water vapor permeability (WVP) declined from 1.27 to 0.81 (× 10<sup>⁻10</sup> g·cm·cm<sup>−2</sup>·h<sup>−1</sup>·Pa<sup>−1</sup>), and the oxygen transmission rate (OTR) dropped from 0.92 to 0.51 (× 10<sup>−4</sup>&#xa0;g/h·cm<sup>2</sup>·Pa). In addition, the TiO<sub>2</sub>/BC/CS film demonstrated enhanced thermal stability, good UV-blocking capability, excellent cytocompatibility, and prolonged antibacterial activity against <i>Escherichia coli</i> (<i>E. coli</i>) and <i>Staphylococcus aureus</i> (<i>S. aureus</i>) bacteria over a 24-h period. What is more, the TiO<sub>2</sub>/BC/CS film showed outstanding preservation effect on fresh-cut apples. The TiO<sub>2</sub>/BC/CS film may have significant applications in food active packaging systems.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Fabrication and characterization of high-performance TiO2/chitosan/bacterial cellulose composite hydrogel film

  • 期刊论文

  • 发表日期：

    2025年10月24日

查看全文
  • Xia Chen,
  • Xinyi Hu,
  • Juan Guo,
  • Yun Chen,
  • Chao Huang,
  • Yong Hu

摘要

The chitosan/bacterial cellulose hydrogel film filled with nano-TiO2 (denoted as TiO2/BC/CS) exhibiting intensive mechanical strength and sustained antibacterial performance was developed by blending a CS/TiO2 dispersion with BC dissolved in a sodium hydroxide/urea solution. Results from FTIR, XRD, and SEM confirmed the establishment of robust interfacial interactions and good compatibility among BC, TiO2, and CS, confirming the successful fabrication of the ternary composite hydrogel film. Compared to the BC/CS film, the tensile strength (TS) of TiO2/BC/CS increased from 36.53 MPa to 53.66 MPa, and swelling capacity elevated from 68.43% to 85.24%. Conversely, the water solubility (WS) of the TiO2/BC/CS reduced from 19.57% to 16.56%, the water vapor permeability (WVP) declined from 1.27 to 0.81 (× 10⁻10 g·cm·cm−2·h−1·Pa−1), and the oxygen transmission rate (OTR) dropped from 0.92 to 0.51 (× 10−4 g/h·cm2·Pa). In addition, the TiO2/BC/CS film demonstrated enhanced thermal stability, good UV-blocking capability, excellent cytocompatibility, and prolonged antibacterial activity against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) bacteria over a 24-h period. What is more, the TiO2/BC/CS film showed outstanding preservation effect on fresh-cut apples. The TiO2/BC/CS film may have significant applications in food active packaging systems.

Graphical Abstract