Oyekanmi Adeleke A, Saharudin N I, Hazwan Che Mohamad, H P S Abdul Khalil, Olaiya Niyi G, Abdullah Che K, Alfatah Tata, Gopakumar Deepu A, Pasquini Daniel
School of Industrial Technology, University Sains Malaysia, Penang 11800, Malaysia.
Chemistry Institute, Federal University of Uberlandia-UFU, Uberlândia 38400-902, Brazil.
Molecules. 2021 Apr 13;26(8):2254. doi: 10.3390/molecules26082254.
Hydrophilic behaviour of carrageenan macroalgae biopolymer, due to hydroxyl groups, has limited its applications, especially for packaging. In this study, macroalgae were reinforced with cellulose nanofibrils (CNFs) isolated from kenaf bast fibres. The macroalgae CNF film was after that treated with silane for hydrophobicity enhancement. The wettability and functional properties of unmodified macroalgae CNF films were compared with silane-modified macroalgae CNF films. Characterisation of the unmodified and modified biopolymers films was investigated. The atomic force microscope (AFM), SEM morphology, tensile properties, water contact angle, and thermal behaviour of the biofilms showed that the incorporation of Kenaf bast CNF remarkably increased the strength, moisture resistance, and thermal stability of the macroalgae biopolymer films. Moreover, the films' modification using a silane coupling agent further enhanced the strength and thermal stability of the films apart from improved water-resistance of the biopolymer films compared to unmodified films. The morphology and AFM showed good interfacial interaction of the components of the biopolymer films. The modified biopolymer films exhibited significantly improved hydrophobic properties compared to the unmodified films due to the enhanced dispersion resulting from the silane treatment. The improved biopolymer films can potentially be utilised as packaging materials.
由于具有羟基，角叉菜大型海藻生物聚合物的亲水性限制了其应用，尤其是在包装方面。在本研究中，采用从红麻韧皮纤维中分离出的纤维素纳米纤维（CNF）对大型海藻进行增强。之后，对大型海藻CNF薄膜进行硅烷处理以增强疏水性。将未改性的大型海藻CNF薄膜与硅烷改性的大型海藻CNF薄膜的润湿性和功能特性进行了比较。对未改性和改性生物聚合物薄膜进行了表征研究。生物薄膜的原子力显微镜（AFM）、扫描电子显微镜（SEM）形态、拉伸性能、水接触角和热行为表明，加入红麻韧皮CNF显著提高了大型海藻生物聚合物薄膜的强度、耐湿性和热稳定性。此外，与未改性薄膜相比，使用硅烷偶联剂对薄膜进行改性除了提高了生物聚合物薄膜的耐水性外，还进一步增强了薄膜的强度和热稳定性。形态和AFM显示生物聚合物薄膜各组分之间具有良好的界面相互作用。由于硅烷处理增强了分散性，改性生物聚合物薄膜与未改性薄膜相比，疏水性显著提高。改进后的生物聚合物薄膜有望用作包装材料。
