Feasibility of bionanocomposite films fabricated using capsicum leaf protein and cellulose nanofibers. (1st September 2022)

• Record Type: Journal Article
• Authors: Qin, Qingyu; Li, Wenhu; Zhang, Xinyan; Gao, Bing; Han, Lujia; Liu, Xian
• Is Part Of: Food chemistry. Volume 387(2022)
• Publication Date: 2022-09-01
• Subjects: Capsicum leaf -- Leaf protein -- Cellulose nanofiber -- Protein-based bionanocomposites -- Feasibility analysis; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2022.132769
• Languages: English
• ISSNs: 0308-8146

Abstract

Graphical abstract: Highlights: Cellulose nanofiber (CNF) can improve the hydrophobicity of protein film. The effect of CNF content on the material properties of film was investigated. CNF improved the strength properties of the capsicum leaf protein films. The CNF and capsicum leaf protein can interact by hydrogen bonding. The feasibility of preparing bio-based materials from capsicum leaf was proven. Abstract: In this study, the feasibility of fabricating protein-based bionanocomposite films (PBBFs) was analysed by applying capsicum leaf protein (CLP) and cellulose nanofiber (CNF) as raw materials. The effects of different amounts of CNF (solid content 2%) on physicochemical and material properties of PBBFs were investigated. The results showed nanoscale CNFs exhibited good interfacial compatibility with CLP. The hydroxyl groups on the CNF surface promoted the association of hydrogen bonds between CLP, glycerol and CNF, which improved the crystal structure and thermal stability of PBBFs. Concurrently, the mechanical properties and hydrophobicity of PBBFs are also enhanced. PBBFs with 60% CNF content have maximum flexibility and hydrophobicity. All PBBFs exhibited ultraviolet barrier performance, indicating that PBBFs had potential application prospects in the development of degradable food packaging materials. The results of the present study can provide a theoretical basis for the efficient utilisation of capsicum planting waste while improving the ecosystem.