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Tang B, Wu X, Liu L, Xu J, Ma J, Zhang H. Preparation of multi-functional active packaging film of Galla chinensis waste CDs/pullulan. Int J Biol Macromol 2024; 275:133221. [PMID: 38942668 DOI: 10.1016/j.ijbiomac.2024.133221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Revised: 06/02/2024] [Accepted: 06/15/2024] [Indexed: 06/30/2024]
Abstract
In this study, multifunctional green carbon dots (CDs) have been synthesized using Galla chinensis waste (GCW) via hydrothermal method for the first time. An active packaging film has been developed in this work by combining CDs and pullulan (PL), using the solution-casting method. The microscopic morphology revealed that the CDs that were prepared using GCW exhibited good compatibility with PL. In addition, it also led to improvement in the toughness of the PL film (14.01 % to 20.26 %), along with its water vapor permeability value [1.31 to 0.53 (g·mm)/(kPa·h·m2)]. The composite films consisting of CDs exhibited good UV blocking rates for the UVA (90.41 %-7.87 %), UVB (87.76 %-0.08 %), and UVC (83.39 %-0 %) spectral ranges. The composite films exhibited strong antioxidant activity, and the clearance of ABTS and DPPH were obtained to be 93.61 % and 86.30 %, respectively. In addition, the composite films showed good antibacterial activity for E. coli and S. aureus, with a high antibacterial rate of up to 99.99 %. Finally, the non-contact preservation of strawberries over a duration of 10 d at room temperature confirmed that the prepared composite film can help preserve the quality of strawberries, as well as extended their shelf-life.
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Affiliation(s)
- Baoshan Tang
- Institute of Highland Forest Science, Chinese Academy of Forestry, Kunming 650223, China; Nanjing Forestry University, Nanjing 210037, China
| | - Xi Wu
- College of Forestry, Southwest Forestry University, Kunming 650224, China
| | - Lanxiang Liu
- Institute of Highland Forest Science, Chinese Academy of Forestry, Kunming 650223, China; Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650223, China
| | - Juan Xu
- Institute of Highland Forest Science, Chinese Academy of Forestry, Kunming 650223, China; Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650223, China
| | - Jinju Ma
- Institute of Highland Forest Science, Chinese Academy of Forestry, Kunming 650223, China; Research Center of Engineering and Technology of Characteristic Forest Resources, Key Laboratory of Breeding and Utilization of Resource Insects, National Forestry and Grassland Administration, Kunming 650223, China
| | - Hong Zhang
- Institute of Highland Forest Science, Chinese Academy of Forestry, Kunming 650223, China.
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Liang F, Liu C, Geng J, Chen N, Lai W, Mo H, Liu K. Chitosan-fucoidan encapsulating cinnamaldehyde composite coating films: Preparation, pH-responsive release, antibacterial activity and preservation for litchi. Carbohydr Polym 2024; 333:121968. [PMID: 38494223 DOI: 10.1016/j.carbpol.2024.121968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 02/16/2024] [Accepted: 02/17/2024] [Indexed: 03/19/2024]
Abstract
In this study, an edible composite film with pH-responsive release was prepared by the formation of Schiff-base imine bonds between chitosan (CS) and oxidized fucoidan (CS-FU) and encapsulating cinnamaldehyde (CA). Fourier-transform infrared, 1H nuclear magnetic resonance, X-ray photoelectron spectroscopy and gel permeation chromatography confirmed the formation of CS-FU. The result showed that, oxidation degree of FU, degrees of substitution, average molecular weight and yield of CS-FU were 25.57 %, 10.48 %, 23.3094 kDa and 45.63 ± 0.64 %, respectively. Scanning electron microscopy revealed that CA was encapsulated within the CS-FU matrix. Increasing the CA content could improve the mechanical properties and ultraviolet and visible-light resistances of the CS-FU coating films but enhance their water vapor permeabilities. The release of CA increased as the pH decreased, and the antibacterial rate at pH 5 was 2.3-fold higher than that at pH 7, indicating good pH-responsive release and antibacterial properties in mildly acidic environments. Owing to their excellent properties, the CA/CS-FU-0.1 coating films maintained the appearance and quality indices of litchis for at least eight days. Hence, multifunctional composite coating films are prospective eco-friendly and intelligently responsive controlled-release packaging materials for fruit preservation.
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Affiliation(s)
- Fengyan Liang
- Life Science and Technology School, Lingnan Normal University, Zhanjiang 524048, China.
| | - Chusi Liu
- Life Science and Technology School, Lingnan Normal University, Zhanjiang 524048, China
| | - Jinwen Geng
- Life Science and Technology School, Lingnan Normal University, Zhanjiang 524048, China; School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Nachuan Chen
- Life Science and Technology School, Lingnan Normal University, Zhanjiang 524048, China
| | - Weida Lai
- Life Science and Technology School, Lingnan Normal University, Zhanjiang 524048, China
| | - Haitong Mo
- Life Science and Technology School, Lingnan Normal University, Zhanjiang 524048, China
| | - Kaidong Liu
- Life Science and Technology School, Lingnan Normal University, Zhanjiang 524048, China.
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Yang X, Niu Y, Fan Y, Zheng T, Fan J. Green synthesis of Poria cocos polysaccharides-silver nanoparticles and their applications in food packaging. Int J Biol Macromol 2024; 269:131928. [PMID: 38688339 DOI: 10.1016/j.ijbiomac.2024.131928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 04/24/2024] [Accepted: 04/26/2024] [Indexed: 05/02/2024]
Abstract
To reduce pollution caused by traditional plastic packaging and preparation of silver nanoparticles (AgNPs), this work aims to develop biological macromolecular packaging films with green synthesized AgNPs. In this study, a novel P. cocos polysaccharide (PCP) with a unique monosaccharide composition was extracted from Poria cocos (Schw.) Wolf. Then, this polysaccharide containing 24.68 % rhamnose was used as a stabilizer for the green synthesis of PCP-AgNPs for the first time. PCP-AgNPs exhibited excellent antibacterial activity against P. aeruginosa, E. coli, and S. aureus, with the highest antibacterial activity against E. coli (inhibition zone diameter = 11.14 ± 0.79 mm). Subsequently, PCP-AgNPs/chitosan (CS) film was successfully prepared by incorporating PCP-AgNPs into the CS film solution. Several experiments demonstrated that the addition of this nanomaterial promoted the formation of noncovalent interactions between CS and PCP-AgNPs, resulting in a more regular and denser film. Compared to the CS film and control group, the PCP-AgNPs/CS film significantly maintained the quality indexes of strawberries. Therefore, this composite film successfully extended the shelf life of strawberries. Regarding safety, these packaging films were not cytotoxic toward RAW264.7 cells. In conclusion, the environmentally friendly PCP-AgNPs/CS film has the potential to replace some traditional food packaging materials.
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Affiliation(s)
- Xiaoqian Yang
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Yun Niu
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Yingrun Fan
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Tingting Zheng
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China
| | - Jiangping Fan
- College of Food Science and Technology, Yunnan Agricultural University, Kunming 650201, China.
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Liao M, Pan Y, Fu X, Wu S, Gan S, Wu Z, Zhao H, Zheng W, Cao Y, Zhou W, Dong X. Electrospun polylactic acid nanofiber film modified by silver oxide deposited on hemp fibers for antibacterial fruit packaging. Int J Biol Macromol 2023; 253:126569. [PMID: 37648140 DOI: 10.1016/j.ijbiomac.2023.126569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 08/24/2023] [Accepted: 08/25/2023] [Indexed: 09/01/2023]
Abstract
Bacterial and fungal contamination have become major factors in fruit spoilage and damage, posing a potential risk to human health. In this work, polylactic acid (PLA) nanofibers combined with Ag2O-hemp fibers for a good antimicrobial effect were developed and applied to antimicrobial fruit fresh-keeping packages. The results of molecular simulation calculations showed that the strength of hydrogen bonds between Ag2O and hemp fibers reached 45.522 kJ·mol-1, which proved that Ag2O and with hemp fibers formed a stable deposition. The Ag2O-hemp fibers modified electrospun polylactic acid nanofibrous composite film exhibited favorable mechanical properties. The tensile strength reached 5.23 ± 0.05 MPa and the elongation at break reached 105.56 ± 3.95 %. The obtained nanofibrous composite film has good antibacterial activity against E. coli, S. aureus, A. niger, and Penicillium, which indicated that they could effectively inhibit the growth of bacteria and fungi. The cell experiments proved that the nanofibrous composite film had good biocompatibility with a cell survival rate of 100 %. The experimental results on the fresh-keeping of red grapes showed that the PLA nanofibrous composite film modified by the Ag2O-hemp fibers could effectively prolong the spoilage time of red grapes at room temperature. Compared with the blank group, the freshness period of PLA nanofiber film modified by Ag2O-hemp fibers could be extended for more than 5 days. The hardness of 15 days (1.94 ± 0.19 × 105 Pa) was basically the same as that of 1 day (2.05 ± 0.06 × 105 Pa). The results were superior to commercially available PE preservation films. The above research results indicated that the Ag2O-hemp fibers modified PLA nanofibrous composite film had potential application prospects in the field of fruit fresh-keeping package.
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Affiliation(s)
- Minjian Liao
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, PR China
| | - Yue Pan
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, PR China
| | - Xuewei Fu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, PR China
| | - Shangjing Wu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, PR China
| | - Shiqi Gan
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, PR China
| | - Ziyang Wu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, PR China
| | - Hui Zhao
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, PR China
| | - Wenxu Zheng
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, PR China.
| | - Yong Cao
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Sciences, South China Agricultural University, Guangzhou, Guangdong 510642, PR China
| | - Wuyi Zhou
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, PR China.
| | - Xianming Dong
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, PR China.
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Li J, Zhang F, Zhong Y, Zhao Y, Gao P, Tian F, Zhang X, Zhou R, Cullen PJ. Emerging Food Packaging Applications of Cellulose Nanocomposites: A Review. Polymers (Basel) 2022; 14:polym14194025. [PMID: 36235973 PMCID: PMC9572456 DOI: 10.3390/polym14194025] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/26/2022] [Accepted: 08/31/2022] [Indexed: 12/04/2022] Open
Abstract
Cellulose is the most abundant biopolymer on Earth, which is synthesized by plants, bacteria, and animals, with source-dependent properties. Cellulose containing β-1,4-linked D-glucoses further assembles into hierarchical structures in microfibrils, which can be processed to nanocellulose with length or width in the nanoscale after a variety of pretreatments including enzymatic hydrolysis, TEMPO-oxidation, and carboxymethylation. Nanocellulose can be mainly categorized into cellulose nanocrystal (CNC) produced by acid hydrolysis, cellulose nanofibrils (CNF) prepared by refining, homogenization, microfluidization, sonification, ball milling, and the aqueous counter collision (ACC) method, and bacterial cellulose (BC) biosynthesized by the Acetobacter species. Due to nontoxicity, good biodegradability and biocompatibility, high aspect ratio, low thermal expansion coefficient, excellent mechanical strength, and unique optical properties, nanocellulose is utilized to develop various cellulose nanocomposites through solution casting, Layer-by-Layer (LBL) assembly, extrusion, coating, gel-forming, spray drying, electrostatic spinning, adsorption, nanoemulsion, and other techniques, and has been widely used as food packaging material with excellent barrier and mechanical properties, antibacterial activity, and stimuli-responsive performance to improve the food quality and shelf life. Under the driving force of the increasing green food packaging market, nanocellulose production has gradually developed from lab-scale to pilot- or even industrial-scale, mainly in Europe, Africa, and Asia, though developing cost-effective preparation techniques and precisely tuning the physicochemical properties are key to the commercialization. We expect this review to summarise the recent literature in the nanocellulose-based food packaging field and provide the readers with the state-of-the-art of this research area.
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Affiliation(s)
- Jingwen Li
- School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, China
| | - Feifan Zhang
- School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, China
| | - Yaqi Zhong
- School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, China
| | - Yadong Zhao
- School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, China
- School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 10044 Stockholm, Sweden
- Correspondence: (Y.Z.); (X.Z.)
| | - Pingping Gao
- School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, China
| | - Fang Tian
- School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, China
| | - Xianhui Zhang
- Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, Institute of Electromagnetics and Acoustics, Xiamen University, Xiamen 361005, China
- Correspondence: (Y.Z.); (X.Z.)
| | - Rusen Zhou
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia
| | - Patrick J. Cullen
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia
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