writer：Somia Yassin Hussain Abdalkarim,Yanyan Wang, Hou-Yong Yu,Zhaofeng Ouyang, Rabie A.M.Asad,Mengya Mu,
keywords：Cellulose nanocrystals; Smart materials; Nanocomposite; Packaging; Sensor
source：期刊
specific source：Industrial Crops and Products
Issue time：2020年

In this work, cellulose nanocrystals (CNCs) incorporated with supermagnetic iron oxide

nanoparticles (Fe3O4 NPs) as (MCNC) hybrids by the co-precipitation method have developed. High-performance nanocomposite films consisting of poly(3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV) and MCNC hybrids have prepared through a simple solution casting method. The addition of CNCs in MCNC-5% hybrids improved the surface hydrophilicity of PHBV,and displayed a reduction in water vapor permeability by 68.1%,

compared with pristine PHBV. The results prove that the addition of MCNC hybrids can be acted like a sensor to detect voltage change of the nanocomposites as functions of water vapor. The existence of CNCs in the MCNC-5% hybrids caused an increase in tensile strength and Young''s modulus by 74.6% and 120.2%, respectively. The addition of CNCs could

enhance cell-matrix interactions and thus cytocompatibility of PHBV nanocomposites. The PHBV/MCNC-5% exhibited saturation magnetization (Ms)values of 1.5 emu g-1 and displayed almost a regular and operative voltage response signal with real-time monitoring of water vapor. This work provides sustainable smart packaging materials with high sensitivity for water vapor and excellent biocompatibility.