Herein,chitosan/pullulan(CS/PL)active films incorporated with quinic acid(QA)and montmorillonite(MMT)were fabricated,and their potential for tofu slice preservation was evaluated.The FTIR analysis confirmed the enhanc...Herein,chitosan/pullulan(CS/PL)active films incorporated with quinic acid(QA)and montmorillonite(MMT)were fabricated,and their potential for tofu slice preservation was evaluated.The FTIR analysis confirmed the enhanced intermolecular interactions between the components of the film matrix.SEM micrographs displayed compact and homogeneous surfaces,ensuring the compatibility of MMT and QA within the CS/PL matrix.These enhancements contributed to a significant improvement in the physicochemical properties of active films.The incorporation of MMT improved the water barrier properties of the film,while QA instilled antimicrobial qualities.Thus,MMT and QA incorporated CS/PL active film presented superior mechanical(tensile strength of~68.51 MPa),UV shielding,water vapor barrier(3.51×10^(-10) gm^(-1)S^(-1)Pa^(-1)),and oxygen barrier features compared to control CS/PL film.It also performed superior antimicrobial and antioxidant functionality,strengthening tofu slice preservation.During preservation,changes in the visual appearance and biochemical constituents of tofu slices have been analyzed.Compared to the unwrapped tofu slice,the tofu slice wrapped in MMT and QA incorporated CS/PL active film displayed greater visual acceptance and retained its biochemical constituents and antioxidant ability.Moreover,the CS/PL active film containing MMT and QA safeguarded the tofu slice more effectively with minimal weight loss(~16.67%)and bacterial count(6.46 log CFU/g)over 72 h of storage at RT than the control CS/PL film.Hence,the fabricated CS/PL active films integrated with MMT and QA can be employed as a functional packaging material for tofu slice preservation.展开更多
The present study reports the fabrication of carboxymethyl cellulose(CMC)/poly(vinyl alcohol)(PVA)blend films(CP)and phenylalanine(PA)incorporated active films(CPPA)by adopting a simple solvent casting method.The infl...The present study reports the fabrication of carboxymethyl cellulose(CMC)/poly(vinyl alcohol)(PVA)blend films(CP)and phenylalanine(PA)incorporated active films(CPPA)by adopting a simple solvent casting method.The influence of PA on the physicochemical and biological properties of the CMC/PVA polymer matrix was studied.The compact SEM micrographs and FTIR spectra reveal effective interaction among PA and CMC/PVA.CPPA active films demonstrated 34.93±1.24 MPa tensile strength,surpassing traditional polyethene(PE)(10-16 MPa)plastics.The CPPA active films exhibited remarkable UV and water barrier properties,as evidenced by enhanced water contact angle results.The moisture adsorption capacity and oxygen permeability of CPPA active films were reduced by 84.54%and 64.27%respectively,compared to CP film.In addition,the CPPA active films portrayed concurring antimicrobial activity against B.subtilis,S.aureus,E.coli,P.aeruginosa and C.albicans food-borne pathogens and exhibited improved DPPH radical scavenging activity,suggesting efficient antioxidant ability to prevent oxidative spoilage of food.These outcomes of CPPA active films comply with the fundamental needs of active packaging materials.展开更多
文摘Herein,chitosan/pullulan(CS/PL)active films incorporated with quinic acid(QA)and montmorillonite(MMT)were fabricated,and their potential for tofu slice preservation was evaluated.The FTIR analysis confirmed the enhanced intermolecular interactions between the components of the film matrix.SEM micrographs displayed compact and homogeneous surfaces,ensuring the compatibility of MMT and QA within the CS/PL matrix.These enhancements contributed to a significant improvement in the physicochemical properties of active films.The incorporation of MMT improved the water barrier properties of the film,while QA instilled antimicrobial qualities.Thus,MMT and QA incorporated CS/PL active film presented superior mechanical(tensile strength of~68.51 MPa),UV shielding,water vapor barrier(3.51×10^(-10) gm^(-1)S^(-1)Pa^(-1)),and oxygen barrier features compared to control CS/PL film.It also performed superior antimicrobial and antioxidant functionality,strengthening tofu slice preservation.During preservation,changes in the visual appearance and biochemical constituents of tofu slices have been analyzed.Compared to the unwrapped tofu slice,the tofu slice wrapped in MMT and QA incorporated CS/PL active film displayed greater visual acceptance and retained its biochemical constituents and antioxidant ability.Moreover,the CS/PL active film containing MMT and QA safeguarded the tofu slice more effectively with minimal weight loss(~16.67%)and bacterial count(6.46 log CFU/g)over 72 h of storage at RT than the control CS/PL film.Hence,the fabricated CS/PL active films integrated with MMT and QA can be employed as a functional packaging material for tofu slice preservation.
文摘The present study reports the fabrication of carboxymethyl cellulose(CMC)/poly(vinyl alcohol)(PVA)blend films(CP)and phenylalanine(PA)incorporated active films(CPPA)by adopting a simple solvent casting method.The influence of PA on the physicochemical and biological properties of the CMC/PVA polymer matrix was studied.The compact SEM micrographs and FTIR spectra reveal effective interaction among PA and CMC/PVA.CPPA active films demonstrated 34.93±1.24 MPa tensile strength,surpassing traditional polyethene(PE)(10-16 MPa)plastics.The CPPA active films exhibited remarkable UV and water barrier properties,as evidenced by enhanced water contact angle results.The moisture adsorption capacity and oxygen permeability of CPPA active films were reduced by 84.54%and 64.27%respectively,compared to CP film.In addition,the CPPA active films portrayed concurring antimicrobial activity against B.subtilis,S.aureus,E.coli,P.aeruginosa and C.albicans food-borne pathogens and exhibited improved DPPH radical scavenging activity,suggesting efficient antioxidant ability to prevent oxidative spoilage of food.These outcomes of CPPA active films comply with the fundamental needs of active packaging materials.
