“…In improving and uncovering new functions to paper, a common and simple technique such as coating has been applied to achieve new properties [ 3 , 4 ]. Substances such as bioactive agents, wax, and biopolymers have been used for paper coating to extend its applications [ 5 – 7 ].…”
Section: Introductionmentioning
confidence: 99%
“…Recently, the new trend of using bio-based extracts from agricultural [ 21 , 22 ], food, and beverage wastes [ 23 ] has attracted considerable attention. Ounkaew et al [ 7 ] prepared the paper coated with green-synthesized AgNPs using spent green tea. They found that the coating of AgNPs on paper enhanced water resistance and inhibited the growth of Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ).…”
The use of active packaging has attracted considerable attention over recent years to prevent and decrease the risk of bacterial and viral infection. Thus, this work aims to develop active packaging using a paper coated with green-synthesized silver nanoparticles (AgNPs). Effects of different silver nitrate (AgNO
3
) concentrations, viz. 50, 100, 150, and 200 mM (AgNPs-50, AgNPs-100, AgNPs-150, and AgNPs-200, respectively), on green synthesis of AgNPs and coated paper properties were investigated. A bio-reducing agent from mangosteen peel extract (ex-Garcinia mangostana (GM)) and citric acid as a crosslinking agent for a starch/polyvinyl alcohol matrix were also used in the synthetic process. The presence of AgNPs, ex-GM, and citric acid indicated the required synergistic antibacterial activities for gram-positive and gram-negative bacteria. The paper coated with AgNPs-150 showed complete inactivation of virus within 1 min. Water resistance and tensile strength of paper improved when being coated with AgNPs-150. The tensile strength of the coated paper was found to be in the same range as that of a common packaging paper. Result revealed that the obtained paper coated with AgNPs was proven to be effective in antibacterial and antiviral activities; hence, it could be used as an active packaging material for items that require manual handling by a number of people.
“…In improving and uncovering new functions to paper, a common and simple technique such as coating has been applied to achieve new properties [ 3 , 4 ]. Substances such as bioactive agents, wax, and biopolymers have been used for paper coating to extend its applications [ 5 – 7 ].…”
Section: Introductionmentioning
confidence: 99%
“…Recently, the new trend of using bio-based extracts from agricultural [ 21 , 22 ], food, and beverage wastes [ 23 ] has attracted considerable attention. Ounkaew et al [ 7 ] prepared the paper coated with green-synthesized AgNPs using spent green tea. They found that the coating of AgNPs on paper enhanced water resistance and inhibited the growth of Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ).…”
The use of active packaging has attracted considerable attention over recent years to prevent and decrease the risk of bacterial and viral infection. Thus, this work aims to develop active packaging using a paper coated with green-synthesized silver nanoparticles (AgNPs). Effects of different silver nitrate (AgNO
3
) concentrations, viz. 50, 100, 150, and 200 mM (AgNPs-50, AgNPs-100, AgNPs-150, and AgNPs-200, respectively), on green synthesis of AgNPs and coated paper properties were investigated. A bio-reducing agent from mangosteen peel extract (ex-Garcinia mangostana (GM)) and citric acid as a crosslinking agent for a starch/polyvinyl alcohol matrix were also used in the synthetic process. The presence of AgNPs, ex-GM, and citric acid indicated the required synergistic antibacterial activities for gram-positive and gram-negative bacteria. The paper coated with AgNPs-150 showed complete inactivation of virus within 1 min. Water resistance and tensile strength of paper improved when being coated with AgNPs-150. The tensile strength of the coated paper was found to be in the same range as that of a common packaging paper. Result revealed that the obtained paper coated with AgNPs was proven to be effective in antibacterial and antiviral activities; hence, it could be used as an active packaging material for items that require manual handling by a number of people.
“…This implied that the surface hydrophobicity of paper can be improved by coating with Ag@Fe 3 O 4 . This high WCA of coated paper samples can be explained based on roughness of a surface (Ounkaew et al 2021a , b ). As described in Cassie’ s theory, the grooves between the pyramid shaped structures on the surface will be occupied by air and hinder water to fill in the grooves (Kansal et al 2020 ).…”
Section: Resultsmentioning
confidence: 99%
“…The lowest weight loss was found with the paper coated with 0.15%w/v Ag@Fe 3 O 4 . The increase in hydrophobicity of coated paper decreased moisture and gas permeability, respiration rate and water loss (Ounkaew et al 2021b ; Pagliarulo et al 2016 ). Fig.…”
Section: Resultsmentioning
confidence: 99%
“…The Ag@Fe 3 O 4 can inhibit S.aureus, E.coli as well as Cryptococcus neoformans . Nowadays, the bio-reducing agents for green synthesis of silver nanoparticles (AgNPs) can be obtained from various sources viz., plants (Li et al 2007 ; Awwad and Salem 2012 ), agricultural wastes (Ringwal et al 2021 ), food and beverage wastes (Abdelmigid et al 2021 ; Ounkaew et al 2021b ). Panzella et al ( 2020 ) studied the new trend of green synthesis of AgNPs using hydrolyzed spent coffee grounds (HSCG).…”
To avoid bacterial and viral infections on food products, the use of antibacterial and antiviral packaging offers great benefit to the food industry. In this study, the coating of paper packaging with silver-decorated magnetic particles (Ag@Fe
3
O
4
) was developed. The Ag@Fe
3
O
4
was prepared by a facile and environmentally friendly method using extracted spent coffee grounds (ex-SCG). The effects of Ag@Fe
3
O
4
content on properties of coated paper were investigated. The overall properties of coated paper improved when the Ag@Fe
3
O
4
content increased up to 0.15%w/v. An increase in tensile strength of 154.01% and a decrease in water vapor permeability of 48.50% were found in coated paper with 0.15%w/v Ag@Fe
3
O
4
. Furthermore, the coated paper also exhibited the synergistic effect on antibacterial activities against
Escherichia coli
(
E. coli
) and
Staphylococcus aureus
(
S. aureus
). The release of metal ions in food simulants and kinetic release parameters were also studied. The release of silver ions and ferrous ions in food simulants met the requirement of overall migration limit of the European Standard. The paper coated with 0.15%w/v Ag@Fe
3
O
4
had better capabilities to maintain quality and extend shelf-life of tomatoes. The obtained Ag@Fe
3
O
4
coated paper is promising for bioactive food packaging to retain food freshness.
Supplementary Information
The online version contains supplementary material available at 10.1007/s10570-022-04636-0.
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