The growing demand for food preservation has driven the development of multifunctional bio-based active packaging materials with reduced environmental impact.Herein,inulin(INL),a readily available polysaccharide from ...The growing demand for food preservation has driven the development of multifunctional bio-based active packaging materials with reduced environmental impact.Herein,inulin(INL),a readily available polysaccharide from chicory roots with limited prior use in packaging,was employed as a reducing and stabilizing agent for the eco-friendly synthesis of silver nanoparticles(AgNPs),which were further used to develop antimicrobial methylcellulose(MC)nanocomposite films.AgNPs formation was confirmed by UV-visible spectroscopy,showing a surface plasmon resonance peak at 410 nm.The AgNPs exhibited an average hydrodynamic diameter of 105 nm and a negative zeta potential(-21.7 mV),indicating good colloidal stability and a predominantly spherical shape of AgNPs with particle size in the range of 15-35 nm,as confirmed by TEM analysis.FTIR,XRD,and SEM analysis confirmed interactions between methylcellulose chains and the formation of uniform MC/INL-AgNPs films.Incorporation of inulin-stabilised AgNPs into MC films enhanced their mechanical strength(peak strength of 32.2 MPa for 20 mM films),thermal stability,UV barrier properties,and water barrier properties,as evidenced by reduced moisture content,solubility,and water vapour transmission rate(WVTR).The MC/INL-AgNPs films exhibited good antioxidant activity(56%)and potent antimicrobial activity against Gram-positive and Gram-negative strains.Silver migration into food simulants remained within permissible safety limits,confirming regulatory compliance.The nanocomposite films showed faster biodegradability,and shelf-life studies on tomatoes revealed reduced weight loss in wrapped fruits.Overall,this study demonstrates a sus-tainable nanocomposite design in which inulin plays a dual role,enabling improved compatibility,performance,and food-contact safety,highlighting its potential for active food packaging applications.展开更多
文摘The growing demand for food preservation has driven the development of multifunctional bio-based active packaging materials with reduced environmental impact.Herein,inulin(INL),a readily available polysaccharide from chicory roots with limited prior use in packaging,was employed as a reducing and stabilizing agent for the eco-friendly synthesis of silver nanoparticles(AgNPs),which were further used to develop antimicrobial methylcellulose(MC)nanocomposite films.AgNPs formation was confirmed by UV-visible spectroscopy,showing a surface plasmon resonance peak at 410 nm.The AgNPs exhibited an average hydrodynamic diameter of 105 nm and a negative zeta potential(-21.7 mV),indicating good colloidal stability and a predominantly spherical shape of AgNPs with particle size in the range of 15-35 nm,as confirmed by TEM analysis.FTIR,XRD,and SEM analysis confirmed interactions between methylcellulose chains and the formation of uniform MC/INL-AgNPs films.Incorporation of inulin-stabilised AgNPs into MC films enhanced their mechanical strength(peak strength of 32.2 MPa for 20 mM films),thermal stability,UV barrier properties,and water barrier properties,as evidenced by reduced moisture content,solubility,and water vapour transmission rate(WVTR).The MC/INL-AgNPs films exhibited good antioxidant activity(56%)and potent antimicrobial activity against Gram-positive and Gram-negative strains.Silver migration into food simulants remained within permissible safety limits,confirming regulatory compliance.The nanocomposite films showed faster biodegradability,and shelf-life studies on tomatoes revealed reduced weight loss in wrapped fruits.Overall,this study demonstrates a sus-tainable nanocomposite design in which inulin plays a dual role,enabling improved compatibility,performance,and food-contact safety,highlighting its potential for active food packaging applications.
