Agricultural & Biosystems Engineering Department, South Dakota State University, 1400 North Campus Drive, Brookings, SD 57007, United States.
Agricultural & Biosystems Engineering Department, South Dakota State University, 1400 North Campus Drive, Brookings, SD 57007, United States.
Carbohydr Polym. 2019 Dec 1;225:115189. doi: 10.1016/j.carbpol.2019.115189. Epub 2019 Aug 12.
The goal of this research is to develop a functional nanocellulose and activated carbon (NAC) film and characterize its biosensing properties for smart packaging applications. The NAC film was prepared from activated carbon powder and nanocellulose gel using the casting method. The nanocellulose contents in the films were varied from 15% to 50% (w/w). Physicochemical properties of the produced films such as electrical conductivity, water absorption capacity, solubility in water and mechanical properties were measured. The electrical conductivity of the NAC film decreased when nanocellulose content increased. The tensile strength (TS), strain and Young's modulus of films increased significantly from 0.03 to 4.78 MPa, 0.13 to 1.94% and 97.64 to 247.3 MPa, respectively, when the nanocellulose contents increased. Thermal stability was also determined using thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC). The results showed that thermal decomposition was occurred in a temperature range of 300-400 °C.
本研究的目的是开发一种功能性纳米纤维素和活性炭（NAC）薄膜，并对其用于智能包装应用的生物传感特性进行表征。NAC 薄膜是通过浇铸法由活性炭粉末和纳米纤维素凝胶制备的。薄膜中的纳米纤维素含量从 15%变化到 50%（w/w）。测量了所制备的薄膜的物理化学性质，如电导率、吸水性、在水中的溶解度和机械性能。随着纳米纤维素含量的增加，NAC 薄膜的电导率降低。当纳米纤维素含量从 0.03 增加到 4.78 MPa、从 0.13 增加到 1.94%和从 97.64 增加到 247.3 MPa 时，薄膜的拉伸强度（TS）、应变和杨氏模量显著增加。使用热重分析（TGA）和差示扫描量热法（DSC）也确定了热稳定性。结果表明，热分解发生在 300-400°C 的温度范围内。
