1
|
Hernández-Guerrero M, Gomez-Maldonado D, Gutiérrez-Castañeda J, Revah S, Campos-Terán J, Vigueras-Ramírez G. Assessment of Culture Systems to Produce Bacterial Cellulose with a Kombucha Consortium. Appl Biochem Biotechnol 2024:10.1007/s12010-024-04929-z. [PMID: 38558275 DOI: 10.1007/s12010-024-04929-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/18/2024] [Indexed: 04/04/2024]
Abstract
Bacterial cellulose (BC) is an emerging material for high-end applications due to its biocompatibility and physicochemical characteristics. However, the scale-up production of this material is still expensive, with the culture medium constituting one-third of the total cost. Herein, four different media (yeast nitrogen base, YNB; Murashige and Skoog, MSO; black tea; and NPK fertilizer solution) were compared while using sucrose as an additional carbon source. The yields of BC were best for YNB and fertilizer with 0.37 and 0.34 gBC/gC respectively. These two were then compared using glucose as a carbon source, with improvements in the production of 29% for the fertilizer, while only an 8% increase for YNB was seen; however, as the carbon concentration increased with a fixed N concentration, the yield was lower but the rate of production of BC increased. The obtained BC films were sanitized and showed low molecular weight and all the expected cellulose characteristic FT-IR bands while SEM showed nanofibers around 0.1 μm. Compared to traditional methods for lab-scale production, the use of the fertilizer and the consortium represent benefits compared to traditional lab-scale BC culture methods such as a competitive cost (two times lower) while posing resilience and tolerance to stress conditions given that it is produced by microbial communities and not with a single strain. Additionally, the low molecular weight of the films could be of interest for certain coating formulations.
Collapse
Affiliation(s)
- Maribel Hernández-Guerrero
- Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana-Cuajimalpa, Vasco de Quiroga 4871, Cuajimalpa, 05348, Mexico City, Mexico
| | - Diego Gomez-Maldonado
- Department of Chemical Engineering, Northeastern University, 360 Huntington Ave, Boston, MA, 02115, USA
| | - Jorge Gutiérrez-Castañeda
- Ingeniería Biológica, Universidad Autónoma Metropolitana-Cuajimalpa, Vasco de Quiroga 4871, Cuajimalpa, 05348, Mexico City, Mexico
| | - Sergio Revah
- Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana-Cuajimalpa, Vasco de Quiroga 4871, Cuajimalpa, 05348, Mexico City, Mexico
| | - José Campos-Terán
- Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana-Cuajimalpa, Vasco de Quiroga 4871, Cuajimalpa, 05348, Mexico City, Mexico
| | - Gabriel Vigueras-Ramírez
- Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana-Cuajimalpa, Vasco de Quiroga 4871, Cuajimalpa, 05348, Mexico City, Mexico.
| |
Collapse
|
2
|
Bacterial Cellulose-Based Biofilm Forming Agent Extracted from Vietnamese Nata-de-Coco Tree by Ultrasonic Vibration Method: Structure and Properties. J CHEM-NY 2022. [DOI: 10.1155/2022/7502796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Bacterial cellulose has recently received more attention in several fields including biology and biomedical applications due to its outstanding physicochemical properties such as thermal stability, biodegradability, good water holding capacity, and high tensile. Cellulose, the most abundant biomolecule on Earth, is available in large amounts in plants. However, cellulose in plants is accompanied by other polymers such as hemicellulose, lignin, and pectin. On the other hand, highly purified bacterial cellulose without impurities is produced by several microorganisms. In which, the most active producer is Acetobacter xylinum. A. This study developed a new process using sonication to isolate bacterial cellulose from nata-de-coco Vietnam. Sonicating time and temperature, two important engineering factors, were considered and discussed (Temperature: 55, 60, 65, 70°C; Time: 15, 30, 60, 90 min). Research results have established that the ultrasonic vibration time of 60 minutes at 65 degrees Celsius gives the best structural properties of BC. The morphology, structural, and thermal properties of the obtained films were investigated by SEM, FTIR, and TGA. Besides, tensile strength was also evaluated. The results show that sonication is not only a favorable technique to isolate cellulose nanofibers but it also enhances their crystallinity.
Collapse
|
3
|
Li S, Hu N, Zhu J, Zheng M, Liu H, Liu J. Influence of modification methods on physicochemical and structural properties of soluble dietary fiber from corn bran. Food Chem X 2022; 14:100298. [PMID: 35399582 PMCID: PMC8989766 DOI: 10.1016/j.fochx.2022.100298] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 03/24/2022] [Accepted: 03/30/2022] [Indexed: 11/24/2022] Open
Abstract
Soluble dietary fiber (SDF), which is a component of dietary fibers exhibit many physiological functions, biological activity, and good gel forming ability. In this study, extraction of SDF from corn bran was evaluated using twin-screw extrusion and ultrasonic treatment and the combinations of the respective methods with dual enzyme hydrolysis. The monosaccharide compositions, molecular weight, physicochemical properties, and structural and functional characteristics were determined. The results showed that ultrasonic and twin-extrusion treatments significantly increased the SDF content from 2.42 to 4.58 and 6.54%, respectively. Dual enzyme hydrolysis further increased the SDF content. Modification treatment changed the monosaccharide composition, improved physicochemical and functional properties, such as water and oil holding capacity, nitrite adsorption, and antioxidative ability. In conclusion, physical modification combined with enzyme treatment distinctly improved the extraction yield, physicochemical and functional properties of SDF. Therefore, the modified SDF is suitable as a functional food additive.
Collapse
Affiliation(s)
- Sheng Li
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, PR China
- National Engineering Laboratory of Wheat and Corn Deep Processing, Jilin Agricultural University, Changchun 130118, PR China
| | - Nannan Hu
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, PR China
- National Engineering Laboratory of Wheat and Corn Deep Processing, Jilin Agricultural University, Changchun 130118, PR China
| | - Jinying Zhu
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, PR China
- National Engineering Laboratory of Wheat and Corn Deep Processing, Jilin Agricultural University, Changchun 130118, PR China
| | - Mingzhu Zheng
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, PR China
- National Engineering Laboratory of Wheat and Corn Deep Processing, Jilin Agricultural University, Changchun 130118, PR China
| | - Huimin Liu
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, PR China
- National Engineering Laboratory of Wheat and Corn Deep Processing, Jilin Agricultural University, Changchun 130118, PR China
| | - Jingsheng Liu
- College of Food Science and Engineering, Jilin Agricultural University, Changchun 130118, PR China
- National Engineering Laboratory of Wheat and Corn Deep Processing, Jilin Agricultural University, Changchun 130118, PR China
| |
Collapse
|
4
|
Nascimento ES, Barros MO, Cerqueira MA, Lima HL, Borges MDF, Pastrana LM, Gama FM, Rosa MF, Azeredo HM, Gonçalves C. All-cellulose nanocomposite films based on bacterial cellulose nanofibrils and nanocrystals. Food Packag Shelf Life 2021. [DOI: 10.1016/j.fpsl.2021.100715] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
5
|
Li Z, Zhang Y, Anankanbil S, Guo Z. Applications of nanocellulosic products in food: Manufacturing processes, structural features and multifaceted functionalities. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2021.03.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
6
|
Tanis SN, Ilhan H, Guven B, Tayyarcan EK, Ciftci H, Saglam N, Hakki Boyaci I, Tamer U. A disposable gold-cellulose nanofibril platform for SERS mapping. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2020; 12:3164-3172. [PMID: 32930178 DOI: 10.1039/d0ay00662a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this study, we present a disposable and inexpensive paper-like gold nanoparticle-embedded cellulose nanofibril substrate for the rapid enumeration of Escherichia coli (E. coli) using surface-enhanced Raman scattering (SERS) mapping. A disposable SERS substrate was simply constructed by mixing CNF and gold chloride solution at 120 °C in a water bath. The application of the resulting substrate was carried out by enrichment and SERS detection of E. coli. To this end, the spherical gold nanoparticle-embedded cellulose nanofibril substrate was used as a scavenger for E. coli. After the target bacteria E. coli were separated from the matrix via oriented antibodies, the sandwich assay procedure was carried out using 5,5-dithiobis-(2-nitrobenzoic acid) (DTNB)-coated Au nanorod particles that acted as SERS mapping probes. The distribution density of DTNB was demonstrated visually using SERS mapping, and the assay was completed in one hour. The correlation between the E. coli and SERS mapping signals was found to be linear within the range of 15 cfu mL-1 to 1.5 × 105 cfu mL-1. The limit of detection for the SERS mapping assay was determined to be 2 cfu mL-1. The selectivity of the developed method was examined with Micrococcus luteus (M. luteus), Bacillus subtilis (B. subtilis), and Enterobacter aerogenes (E. aerogenes), which did not produce any significant response. Furthermore, the developed method was evaluated for detecting E. coli in artificially contaminated samples, and the results were compared with those of the plate-counting method.
Collapse
Affiliation(s)
- Saliha Nur Tanis
- Department of Nanotechnology, Faculty of Science, Hacettepe University, Beytepe, 06800, Ankara, Turkey
| | - Hasan Ilhan
- Faculty of Art and Science, Ordu University, Altınordu, 52200, Ordu, Turkey
| | - Burcu Guven
- Department of Food Engineering, Faculty of Engineering, Hacettepe University, Beytepe, 06800, Ankara, Turkey
| | - Emine Kubra Tayyarcan
- Department of Food Engineering, Faculty of Engineering, Hacettepe University, Beytepe, 06800, Ankara, Turkey
| | - Hakan Ciftci
- Department of Chemistry and Chemical Processing Technologies, Kirikkale Vocational High School, Kirikkale University, Yahsihan, 71450, Kirikkale, Turkey
| | - Necdet Saglam
- Department of Nanotechnology, Faculty of Science, Hacettepe University, Beytepe, 06800, Ankara, Turkey
| | - Ismail Hakki Boyaci
- Department of Food Engineering, Faculty of Engineering, Hacettepe University, Beytepe, 06800, Ankara, Turkey
| | - Ugur Tamer
- Department of Analytical Chemistry, Faculty of Pharmacy, Gazi University, Etiler, 06330, Ankara, Turkey.
| |
Collapse
|
7
|
Xu H, Li Y, Hua D, Zhao Y, Mu H, Chen H, Chen G. Enhancing the anaerobic digestion of corn stover by chemical pretreatment with the black liquor from the paper industry. BIORESOURCE TECHNOLOGY 2020; 306:123090. [PMID: 32169512 DOI: 10.1016/j.biortech.2020.123090] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/25/2020] [Accepted: 02/28/2020] [Indexed: 06/10/2023]
Abstract
In this work, black liquor as a waste from paper industry was used to pretreat corn stover before anaerobic digestion. The batch mode anaerobic digestion achieved a methane production up to 260.5 mL/g VS when the corn stover was pretreated the black liquor of 12 g NaOH/L alkalinity for 24 h, which was 59.1% higher than the control. In the semi-continuous mode anaerobic digestion, black liquor pretreatment increased the buffering capacity of the digestate to maintain suitable pH and total VFA/alkalinity ratio with no adverse effect resulted from the presence of ions. The structural and chemical changes of corn stover after the pretreatment were investigated to rationalize the enhanced performance of anaerobic digestion.
Collapse
Affiliation(s)
- Haipeng Xu
- School of Environment Science and Engineering, Tianjin University, Tianjin 300072, China; Energy Institute, Qilu University of Technology(Shandong Academy of Sciences), Shandong Key Laboratory of Biomass Gasification Technology, Jinan 250014,China)
| | - Yan Li
- Energy Institute, Qilu University of Technology(Shandong Academy of Sciences), Shandong Key Laboratory of Biomass Gasification Technology, Jinan 250014,China)
| | - Dongliang Hua
- Energy Institute, Qilu University of Technology(Shandong Academy of Sciences), Shandong Key Laboratory of Biomass Gasification Technology, Jinan 250014,China)
| | - Yuxiao Zhao
- Energy Institute, Qilu University of Technology(Shandong Academy of Sciences), Shandong Key Laboratory of Biomass Gasification Technology, Jinan 250014,China)
| | - Hui Mu
- Energy Institute, Qilu University of Technology(Shandong Academy of Sciences), Shandong Key Laboratory of Biomass Gasification Technology, Jinan 250014,China)
| | - Honglei Chen
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Guanyi Chen
- School of Environment Science and Engineering, Tianjin University, Tianjin 300072, China.
| |
Collapse
|
8
|
Xu H, Li Y, Hua D, Mu H, Zhao Y, Chen G. Methane production from the anaerobic digestion of substrates from corn stover: Differences between the stem bark, stem pith, and leaves. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 694:133641. [PMID: 31756805 DOI: 10.1016/j.scitotenv.2019.133641] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 07/12/2019] [Accepted: 07/26/2019] [Indexed: 06/10/2023]
Abstract
This work evaluated the methane potential and methane production rate of the stem bark (SB), stem pith (SP), and leaves (LV) of corn stover from batch anaerobic digestion. The obtained cumulative methane potential and the hydrolysis kinetics constant were 0.201, 0.214, and 0.199 L g-1 VS (volatile solids) and 0.090, 0.149, and 0.227 d-1 for SB, SP, and LV, respectively. The chemical composition and the crystalline structure of the substrates as well as their changes during the anaerobic digestion were inspected, and their impacts on the characteristics of methane production were assessed. The methane production rate correlated positively with the hemicellulose and soluble compounds content and negatively with the cellulose and lignin content, but the degradation rates of hemicellulose and cellulose in the specific substrate were complex and comparable. The methane production has limit correlation with the crystalline structure of the substrates. Microbial community structure was analyzed to elucidate functional microorganism contributing to methane production of different substrate. The abundance of Bacteroidetes and Firmicutes was most affected by the substrate, and positively related to methane yields.
Collapse
Affiliation(s)
- Haipeng Xu
- School of Environment Science and Engineering, Tianjin University, Tianjin 300072, China; Energy Institute, Qilu University of Technology (Shandong Academy of Sciences), Shandong Key Laboratory of Biomass Gasification Technology, Jinan 250014, China
| | - Yan Li
- Energy Institute, Qilu University of Technology (Shandong Academy of Sciences), Shandong Key Laboratory of Biomass Gasification Technology, Jinan 250014, China
| | - Dongliang Hua
- Energy Institute, Qilu University of Technology (Shandong Academy of Sciences), Shandong Key Laboratory of Biomass Gasification Technology, Jinan 250014, China
| | - Hui Mu
- Energy Institute, Qilu University of Technology (Shandong Academy of Sciences), Shandong Key Laboratory of Biomass Gasification Technology, Jinan 250014, China
| | - Yuxiao Zhao
- Energy Institute, Qilu University of Technology (Shandong Academy of Sciences), Shandong Key Laboratory of Biomass Gasification Technology, Jinan 250014, China
| | - Guanyi Chen
- School of Environment Science and Engineering, Tianjin University, Tianjin 300072, China.
| |
Collapse
|
9
|
Structural and rheological characterization of bacterial cellulose gels obtained from Gluconacetobacter genus. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2019.01.060] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
10
|
Suryanto H, Muhajir M, Sutrisno TA, Mudjiono, Zakia N, Yanuhar U. The Mechanical Strength and Morphology of Bacterial Cellulose Films: The Effect of NaOH Concentration. ACTA ACUST UNITED AC 2019. [DOI: 10.1088/1757-899x/515/1/012053] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
11
|
Biliuta G, Coseri S. Cellulose: A ubiquitous platform for ecofriendly metal nanoparticles preparation. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.01.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
12
|
Younas M, Noreen A, Sharif A, Majeed A, Hassan A, Tabasum S, Mohammadi A, Zia KM. A review on versatile applications of blends and composites of CNC with natural and synthetic polymers with mathematical modeling. Int J Biol Macromol 2019; 124:591-626. [PMID: 30447361 DOI: 10.1016/j.ijbiomac.2018.11.064] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 11/04/2018] [Accepted: 11/12/2018] [Indexed: 12/20/2022]
Abstract
Cellulose is world's most abundant, renewable and recyclable polysaccharide on earth. Cellulose is composed of both amorphous and crystalline regions. Cellulose nanocrystals (CNCs) are extracted from crystalline region of cellulose. The most attractive feature of CNC is that it can be used as nanofiller to reinforce several synthetic and natural polymers. In this article, a comprehensive overview of modification of several natural and synthetic polymers using CNCs as reinforcer in respective polymer matrix is given. The immense activities of CNCs are successfully utilized to enhance the mechanical properties and to broaden the field of application of respective polymer. All the technical scientific issues have been discussed highlighting the recent advancement in biomedical and packaging field.
Collapse
Affiliation(s)
- Muhammad Younas
- Department of Mathematics, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
| | - Aqdas Noreen
- Institute of Chemistry, Government College University, Faisalabad 38030, Pakistan
| | - Aqsa Sharif
- Institute of Chemistry, Government College University, Faisalabad 38030, Pakistan
| | - Ayesha Majeed
- Institute of Chemistry, Government College University, Faisalabad 38030, Pakistan
| | - Abida Hassan
- Institute of Chemistry, Government College University, Faisalabad 38030, Pakistan
| | - Shazia Tabasum
- Institute of Chemistry, Government College University, Faisalabad 38030, Pakistan
| | - Abbas Mohammadi
- Department of Polymer Chemistry, University of Isfahan, Isfahan, Islamic Republic of Iran
| | - Khalid Mahmood Zia
- Institute of Chemistry, Government College University, Faisalabad 38030, Pakistan.
| |
Collapse
|
13
|
Xu Y, Guo Y, Duan S, Wei H, Liu Y, Wang L, Huo X, Yang Y. Effects of ultrasound irradiation on the characterization and bioactivities of the polysaccharide from blackcurrant fruits. ULTRASONICS SONOCHEMISTRY 2018; 49:206-214. [PMID: 30181026 DOI: 10.1016/j.ultsonch.2018.08.005] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 08/09/2018] [Accepted: 08/09/2018] [Indexed: 06/08/2023]
Abstract
In this study, the influence of ultrasound irradiation on the characterization and bioactivities of the polysaccharide from blackcurrant fruits (BCP, molecular weight: Mw = 3.26 × 104 kDa) was investigated. Two degraded polysaccharides (U-400, Mw = 1.89 × 104 kDa, and U-600, Mw = 1.32 × 104 kDa) were obtained by different ultrasound powers of 400 W and 600 W, respectively. Compared with BCP, U-400 and U-600 showed 63.52% and 68.85% reductions in the particle size (Zavg), respectively; moreover, the dynamic viscosity of BCP was reduced by 27.88%, and 33.63%, separately. The reducing sugar content and thermal stability increased with the increase of ultrasound intensity. The degraded polysaccharides contained the same monosaccharide species as those of BCP but at different molar ratios. Fourier transform infrared (FT-IR) and nuclear magnetic resonance (NMR) spectroscopic analysis confirmed that the degraded polysaccharides and BCP exhibited the similar structural features, which were mainly composed of six glycosidic bonds. A reduction in surface area of the flake-like structure was observed in the degraded polysaccharides compared to that of BCP, and they had no triple helix structure. Furthermore, the precise structural characteristics of U-600 were identified by 2D NMR analysis. The results of the bioactivity assays indicated that the ultrasound irradiation could evidently enhance the antioxidant (hydroxyl and superoxide radicals scavenging, lipid peroxidation inhibition, and DNA damage protection activities), α-amylase and α-glucosidase inhibition activities of BCP. These activities increased in the order of U-600 > U-400 > BCP. In particular, the DNA protection and α-amylase inhibition activities for U-600 were 52.19 ± 1.34% and 75.98 ± 0.77%, respectively, which were 2 times higher than those of BCP. U-600 prepared with the higher-intensity ultrasound exhibited the best physicochemical properties and bioactivities among the three polysaccharides. These results suggested that ultrasound irradiation was an efficient, green method to produce value-added polysaccharide for use in functional food or medicine.
Collapse
Affiliation(s)
- Yaqin Xu
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Yingying Guo
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Suyang Duan
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Hong Wei
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Yusong Liu
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Libo Wang
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Xin Huo
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Yu Yang
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China.
| |
Collapse
|
14
|
Shao X, Sun H, Jiang R, Qin T, Ma Z. Mechanical and moisture barrier properties of corn distarch phosphate film influenced by modified microcry stalline corn straw cellulose. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:5639-5646. [PMID: 29707794 DOI: 10.1002/jsfa.9109] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 04/25/2018] [Accepted: 04/29/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND In this paper, a novel modified microcrystalline corn straw cellulose (MMCSC) was prepared by ultrasonic/microwave-assisted treatment. Effective incorporation of MMCSC into corn distarch phosphate (CDP)-based composite films was investigated. RESULTS As the proportion of MMCSC was increased, tensile strength increased initially before decreasing, and the elongation at break always decreased. The composite film of MMCSC20 showed the lowest water vapor permeability (2.917 × 10-7 g m-1 h-1 Pa-1 ). The measurement of surface color showed that by the increasing of the MMCSC proportion in composite films, the L* and b* values and the total color difference (ΔE* ) increased, while a* values decreased. Fourier transform infrared spectroscopy and X-ray diffraction analysis indicated that, with the incorporation of MMCSC, the stable structure of the films was enhanced through cross-linking and the crystallinity was increased. A scanning electron microscopy study revealed the surface microstructure of films (MMCSC0-MMCSC30) was smooth and homogeneous, and there was no distinct separation in the matrix of composite films. CONCLUSION The incorporation of suitable MMCSC could improve the properties of composite films. The CDP-MMCSC films, which are completely biodegradable and environmental friendly, have a high potential to be used for food packaging. © 2018 Society of Chemical Industry.
Collapse
Affiliation(s)
- Xinru Shao
- Tonghua Normal University, College of Food Science and Engineering, Tonghua, PR China
| | - Haitao Sun
- Tonghua Normal University, College of Food Science and Engineering, Tonghua, PR China
| | - Ruiping Jiang
- Tonghua Normal University, College of Food Science and Engineering, Tonghua, PR China
| | - Ting Qin
- Tonghua Normal University, College of Food Science and Engineering, Tonghua, PR China
| | - Zhongsu Ma
- Jilin University, College of Food Science and Engineering, Changchun, PR China
| |
Collapse
|
15
|
Agarwal C, Máthé K, Hofmann T, Csóka L. Ultrasound-Assisted Extraction of Cannabinoids from Cannabis Sativa L. Optimized by Response Surface Methodology. J Food Sci 2018; 83:700-710. [PMID: 29437231 DOI: 10.1111/1750-3841.14075] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Revised: 01/08/2018] [Accepted: 01/14/2018] [Indexed: 01/20/2023]
Abstract
Ultrasonication was used to extract bioactive compounds from Cannabis sativa L. such as polyphenols, flavonoids, and cannabinoids. The influence of 3 independent factors (time, input power, and methanol concentration) was evaluated on the extraction of total phenols (TPC), flavonoids (TF), ferric reducing ability of plasma (FRAP) and the overall yield. A face-centered central composite design was used for statistical modelling of the response data, followed by regression and analysis of variance in order to determine the significance of the model and factors. Both the solvent composition and the time significantly affected the extraction while the sonication power had no significant impact on the responses. The response predictions obtained at optimum extraction conditions of 15 min time, 130 W power, and 80% methanol were 314.822 mg GAE/g DW of TPC, 28.173 mg QE/g DW of TF, 18.79 mM AAE/g DW of FRAP, and 10.86% of yield. A good correlation was observed between the predicted and experimental values of the responses, which validated the mathematical model. On comparing the ultrasonic process with the control extraction, noticeably higher values were obtained for each of the responses. Additionally, ultrasound considerably improved the extraction of cannabinoids present in Cannabis. PRACTICAL APPLICATION Low frequency ultrasound was employed to extract bioactive compounds from the inflorescence part of Cannabis. The responses evaluated were-total phenols, flavonoids, ferric reducing assay and yield. The solvent composition and time significantly influenced the extraction process. Appreciably higher extraction of cannabinoids was achieved on sonication against control.
Collapse
Affiliation(s)
- Charu Agarwal
- Inst. of Wood Based Products and Technologies, Univ. of Sopron, Bajcsy-Zsilinszky u. 4, Sopron 9400, Hungary
| | - Katalin Máthé
- Inst. of Applied Arts, Univ. of Sopron, Bajcsy-Zsilinszky u. 4, Sopron 9400, Hungary
| | - Tamás Hofmann
- Inst. of Chemistry, Univ. of Sopron, Bajcsy-Zsilinszky u. 4, Sopron 9400, Hungary
| | - Levente Csóka
- Inst. of Wood Based Products and Technologies, Univ. of Sopron, Bajcsy-Zsilinszky u. 4, Sopron 9400, Hungary
| |
Collapse
|
16
|
Ran G, Li D, Zheng T, Liu X, Chen L, Cao Q, Yan Z. Hydrothermal pretreatment on the anaerobic digestion of washed vinegar residue. BIORESOURCE TECHNOLOGY 2018; 248:265-271. [PMID: 28651869 DOI: 10.1016/j.biortech.2017.06.068] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 06/09/2017] [Accepted: 06/12/2017] [Indexed: 06/07/2023]
Abstract
The aim of this work was to study the acetate separation from fresh vinegar residue (FVR) to avoid inhibition of methanogenesis and hydrothermal treatment on washed vinegar residue (WVR) to enhance methane production. The optimal liquid-solid ratio was 10:1mL/g for the washing of FVR. The methane yields of the FVR, WVR, and washed leachate (WL) were 273L/kgVS, 199L/kgVS, and 306.9L/kgCOD, respectively. The optimal hydrothermal temperature was 160°C for WVR, with maximum methane yield of 258.38L/kgVS. Hydrothermal pretreatment destroyed the structure of lignocellulose and improved the hydrolysis of hemicellulose. Compared with thermophilic digestion of FVR, thermophilic digestion of 160°C treated FVR, and thermophilic digestion of WVR with mesophilic digestion of WL, the thermophilic digestion of 160°C treated WVR with mesophilic digestion of WL obtained the maximum total methane yield of 102.5L/kgFVR.
Collapse
Affiliation(s)
- Genzhu Ran
- Institute of Urban and Rural Mines, Changzhou University, Changzhou 213164, China
| | - Dong Li
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China; Jiangsu Key Laboratory for Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China.
| | - Tao Zheng
- Institute of Urban and Rural Mines, Changzhou University, Changzhou 213164, China
| | - Xiaofeng Liu
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China
| | - Lin Chen
- Institute of Urban and Rural Mines, Changzhou University, Changzhou 213164, China
| | - Qin Cao
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China
| | - Zhiying Yan
- Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China
| |
Collapse
|
17
|
Zhang W, Zeng G, Pan Y, Chen W, Huang W, Chen H, Li Y. Properties of soluble dietary fiber-polysaccharide from papaya peel obtained through alkaline or ultrasound-assisted alkaline extraction. Carbohydr Polym 2017; 172:102-112. [DOI: 10.1016/j.carbpol.2017.05.030] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 04/23/2017] [Accepted: 05/08/2017] [Indexed: 10/19/2022]
|
18
|
Ahmed F, Ayoub Arbab A, Jatoi AW, Khatri M, Memon N, Khatri Z, Kim IS. Ultrasonic-assisted deacetylation of cellulose acetate nanofibers: A rapid method to produce cellulose nanofibers. ULTRASONICS SONOCHEMISTRY 2017; 36:319-325. [PMID: 28069216 DOI: 10.1016/j.ultsonch.2016.12.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 12/08/2016] [Accepted: 12/09/2016] [Indexed: 06/06/2023]
Abstract
Herein we report a rapid method for deacetylation of cellulose acetate (CA) nanofibers in order to produce cellulose nanofibers using ultrasonic energy. The CA nanofibers were fabricated via electrospinning thereby treated with NaOH and NaOH/EtOH solutions at various pH levels for 30, 60 and 90min assisted by ultrasonic energy. The nanofiber webs were optimized by degree of deacetylation (DD%) and wicking behavior. The resultant nanofibers were further characterized by FTIR, SEM, WAXD, DSC analysis. The DD% and FTIR results confirmed a complete conversion of CA nanofibers to cellulose nanofibers within 1h with substantial increase of wicking height. Nanofibers morphology under SEM showed slightly swelling and no damage of nanofibers observed by use of ultrasonic energy. The results of ultrasonic-assisted deacetylation are comparable with the conventional deacetylation. Our rapid method offers substantially reduced deacetylation time from 30h to just 1h, thanks to the ultrasonic energy.
Collapse
Affiliation(s)
- Farooq Ahmed
- Nanomaterials Research Lab, Department of Textile Engineering, Mehran University of Engineering and Technology, Jamshoro 76062, Pakistan
| | - Alvira Ayoub Arbab
- Nanomaterials Research Lab, Department of Textile Engineering, Mehran University of Engineering and Technology, Jamshoro 76062, Pakistan
| | - Abdul Wahab Jatoi
- Nanomaterials Research Lab, Department of Textile Engineering, Mehran University of Engineering and Technology, Jamshoro 76062, Pakistan; Nano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Tokida 3-15-1, Ueda, Nagano Prefecture 386-8567, Japan
| | - Muzamil Khatri
- Nano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Tokida 3-15-1, Ueda, Nagano Prefecture 386-8567, Japan
| | - Najma Memon
- National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan
| | - Zeeshan Khatri
- Nanomaterials Research Lab, Department of Textile Engineering, Mehran University of Engineering and Technology, Jamshoro 76062, Pakistan; Nano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Tokida 3-15-1, Ueda, Nagano Prefecture 386-8567, Japan.
| | - Ick Soo Kim
- Nano Fusion Technology Research Group, Division of Frontier Fibers, Institute for Fiber Engineering (IFES), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Tokida 3-15-1, Ueda, Nagano Prefecture 386-8567, Japan.
| |
Collapse
|
19
|
He Z, Wang Z, Zhao Z, Yi S, Mu J, Wang X. Influence of ultrasound pretreatment on wood physiochemical structure. ULTRASONICS SONOCHEMISTRY 2017; 34:136-141. [PMID: 27773229 DOI: 10.1016/j.ultsonch.2016.05.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 05/19/2016] [Accepted: 05/20/2016] [Indexed: 06/06/2023]
Abstract
As an initial step to increase the use of renewable biomass resources, this study was aimed at investigating the effects of ultrasound pretreatment on structural changes of wood. Samples were pretreated by ultrasound with the power of 300W and frequency of 28kHz in aqueous soda solution, aqueous acetic acid, or distilled water, then pretreated and control samples were characterized via X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The results shown that ultrasound pretreatment is indeed effective in modifying the physiochemical structure of eucalyptus wood; the pretreatment decreased the quantity of alkali metals (e.g., potassium, calcium and magnesium) in the resulting material. Compared to the control group, the residual char content of samples pretreated in aqueous soda solution increased by 10.08%-20.12% and the reaction temperature decreased from 361°C to 341°C, however, in samples pretreated by ultrasound in acetic solution or distilled water, the residual char content decreased by 12.40%-21.45% and there were no significant differences in reactivity apart from a slightly higher maximum reaction rate. Ultrasound pretreatment increased the samples' crystallinity up to 35.5% and successfully removed cellulose, hemicellulose, and lignin from the samples; the pretreatment also increased the exposure of the sample to the treatment solutions, broke down sample pits, and generated collapses and microchannels on sample pits, and removed attachments in the samples.
Collapse
Affiliation(s)
- Zhengbin He
- Beijing Key Laboratory of Wood Science and Engineering, College of Material Science and Technology, Beijing Forestry University, Beijing, PR China.
| | - Zhenyu Wang
- Beijing Key Laboratory of Wood Science and Engineering, College of Material Science and Technology, Beijing Forestry University, Beijing, PR China
| | - Zijian Zhao
- Beijing Key Laboratory of Wood Science and Engineering, College of Material Science and Technology, Beijing Forestry University, Beijing, PR China
| | - Songlin Yi
- Beijing Key Laboratory of Wood Science and Engineering, College of Material Science and Technology, Beijing Forestry University, Beijing, PR China.
| | - Jun Mu
- Beijing Key Laboratory of Wood Science and Engineering, College of Material Science and Technology, Beijing Forestry University, Beijing, PR China
| | - Xiaoxu Wang
- Beijing Key Laboratory of Wood Science and Engineering, College of Material Science and Technology, Beijing Forestry University, Beijing, PR China
| |
Collapse
|
20
|
Wang W, Ma X, Jiang P, Hu L, Zhi Z, Chen J, Ding T, Ye X, Liu D. Characterization of pectin from grapefruit peel: A comparison of ultrasound-assisted and conventional heating extractions. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2016.06.019] [Citation(s) in RCA: 279] [Impact Index Per Article: 34.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
21
|
Stumpf TR, Yang X, Zhang J, Cao X. In situ and ex situ modifications of bacterial cellulose for applications in tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 82:372-383. [PMID: 29025671 DOI: 10.1016/j.msec.2016.11.121] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 10/04/2016] [Accepted: 11/27/2016] [Indexed: 12/20/2022]
Abstract
Bacterial cellulose (BC) is secreted by a few strains of bacteria and consists of a cellulose nanofiber network with unique characteristics. Because of its excellent mechanical properties, outstanding biocompatibilities, and abilities to form porous structures, BC has been studied for a variety of applications in different fields, including the use as a biomaterial for scaffolds in tissue engineering. To extend its applications in tissue engineering, native BC is normally modified to enhance its properties. Generally, BC modifications can be made by either in situ modification during cell culture or ex situ modification of existing BC microfibers. In this review we will first provide a brief introduction of BC and its attributes; this will set the stage for in-depth and up-to-date discussions on modified BC. Finally, the review will focus on in situ and ex situ modifications of BC and its applications in tissue engineering, particularly in bone regeneration and wound dressing.
Collapse
Affiliation(s)
- Taisa Regina Stumpf
- Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada
| | - Xiuying Yang
- Hainan Institute of Science and Technology, 571126 Haikou, China
| | - Jingchang Zhang
- Hainan Institute of Science and Technology, 571126 Haikou, China.
| | - Xudong Cao
- Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, Ontario, K1N 6N5, Canada.
| |
Collapse
|
22
|
Sheykhnazari S, Tabarsa T, Ashori A, Ghanbari A. Bacterial cellulose composites loaded with SiO 2 nanoparticles: Dynamic-mechanical and thermal properties. Int J Biol Macromol 2016; 93:672-677. [PMID: 27637448 DOI: 10.1016/j.ijbiomac.2016.09.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Revised: 09/02/2016] [Accepted: 09/11/2016] [Indexed: 11/18/2022]
Abstract
The aim of this paper was to prepare composites of bacterial cellulose (BC) filled with silica (SiO2) nanoparticles to evaluate the influence of the SiO2 contents (3, 5 and 7wt%) on the thermo-mechanical properties of the composites. BC hydro-gel was immersed in an aqueous solution of silanol derived from tetraethoxysilane (TEOS), the silanol was then converted into SiO2 in the BC matrix by pressing at 120°C and 2MPa. The BC/SiO2 translucent sheets were examined by dynamic-mechanical analysis (DMA), thermo gravimetric analysis (TGA), and scanning electron microscopy (SEM). The temperature dependence of the storage modulus, loss modulus and tan delta was determined by DMA. In general, the results revealed that the increment of storage modulus and thermal stability increased concomitantly with the augmentation of SiO2 content. Therefore, it could be concluded that the mechanical properties of the composites were improved by using high amounts of nano silica. This would be a high aspect ratio of BC capable of connecting the BC matrix and SiO2, thereby enhancing a large contact surface and resulting in excellent coherence. A decrease of the storage modulus was consistent with increasing temperature, resulting from softening of the composites. The storage modulus of the composites increased in the order: BC/S7>BC/S5>BC/S3, while the loss modulus and tan delta decreased. On the other hand, the thermal stabilities of all BC/SiO2 composites were remarkably enhanced as compared to the pristine BC. TGA curves showed that the temperature of decomposition of the pure BC gradually shifted from about 260°C to about 370°C as silica content increased. SEM observations illustrated that the nano-scale SiO2 was embedded between the voids and nano-fibrils of the BC matrix. Overall, the results indicated that the successful synthesis and superior properties of BC/SiO2 advocate its effectiveness for various applications.
Collapse
Affiliation(s)
- Somayeh Sheykhnazari
- Department of Wood and Paper Technology, Gorgan University of Agricultural Sciences & Natural Resources, Gorgan, Iran
| | - Taghi Tabarsa
- Department of Wood and Paper Technology, Gorgan University of Agricultural Sciences & Natural Resources, Gorgan, Iran
| | - Alireza Ashori
- Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), P.O. Box 33535111, Tehran, Iran.
| | - Abbas Ghanbari
- Department of Wood and Paper Technology, Gorgan University of Agricultural Sciences & Natural Resources, Gorgan, Iran
| |
Collapse
|
23
|
Sun H, Shao X, Ma Z. Effect of Incorporation Nanocrystalline Corn Straw Cellulose and Polyethylene Glycol on Properties of Biodegradable Films. J Food Sci 2016; 81:E2529-E2537. [PMID: 27561131 DOI: 10.1111/1750-3841.13427] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 06/18/2016] [Accepted: 07/21/2016] [Indexed: 02/01/2023]
Abstract
This work aimed to study the effect of nanocrystalline corn straw cellulose (NCSC) and polyethylene glycol (PEG) on the properties of biodegradable corn distarch phosphate (CDP) films. The mechanical properties and barrier properties were investigated. Meanwhile, the compatibility, crystallization, thermal stability, and morphological structure of the films were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (X-RD), thermogravimetric (TGA), and scanning electron microscopy (SEM). In contrast with the CDP films, incorporation of NCSC in the films improved their tensile strength (TS) significantly, and incorporation of PEG improved their elongation at break (EAB) significantly else. PEG, CDP, and NCSC (P-CDP/NCSC) blend films had the best barrier properties. The thermal stability of the films was increased by the incorporation of NCSC. X-RD showed that CDP and NCSC (CDP/NCSC) films had higher crystallinity. SEM revealed that all films had smooth surface, while the films presented a uniform network structure through the incorporation of NCSC.
Collapse
Affiliation(s)
- Haitao Sun
- College of Food Science and Engineering, Jilin Univ, No. 5333 Xi'an Road, Changchun, 130062, Jilin, PR China. .,College of Pharmaceutical and Food Science, Tonghua Normal Univ, No. 950 Yucai Road, Tonghua, 134000, Jilin, PR China.
| | - Xinru Shao
- College of Pharmaceutical and Food Science, Tonghua Normal Univ, No. 950 Yucai Road, Tonghua, 134000, Jilin, PR China
| | - Zhongsu Ma
- College of Food Science and Engineering, Jilin Univ, No. 5333 Xi'an Road, Changchun, 130062, Jilin, PR China
| |
Collapse
|
24
|
Csiszar E, Kalic P, Kobol A, Ferreira EDP. The effect of low frequency ultrasound on the production and properties of nanocrystalline cellulose suspensions and films. ULTRASONICS SONOCHEMISTRY 2016; 31:473-480. [PMID: 26964974 DOI: 10.1016/j.ultsonch.2016.01.028] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 01/14/2016] [Accepted: 01/26/2016] [Indexed: 06/05/2023]
Abstract
Suspension of nanocrystalline cellulose (NCC) produced from bleached cotton by controlled sulphuric acid hydrolysis was treated with low frequency ultrasound at 20 kHz and 60% amplitude for 0, 1, 2, 5 and 10 min and the effects of sonication on the properties of both the cellulose nanocrystals and their aqueous suspensions were investigated. Furthermore, a series of nanocellulose films were manufactured from the suspensions that were sonicated for different periods of time and tested. Laser diffraction analysis and transmission electron microscopy proved that sonication not only disintegrated the large NCC aggregates (Dv50 14.7 μm) to individual nanowhiskers with an average length and width of 171 ± 57 and 17 ± 4 nm, respectively, but also degraded the nanocrystals and yielded shorter and thinner particles (118 ± 45 and 13 ± 3 nm, respectively) at 10-min sonication. The ultrasound-assisted disintegration to nano-sized cellulose whiskers decreased the optical haze of suspensions from 98.4% to 52.8% with increasing time from 0 to 10 min, respectively. Sonication of the suspensions significantly contributed to the preparation of films with low haze (high transparency) and excellent tensile properties. With the increasing duration of sonication, the haze decreased and the tensile strength rose gradually. Irrespectively of sonication, however, all films had an outstanding oxygen transmission rate in a range of 5.5-6.9 cm(3)/m(2)day, and a poor thermal stability.
Collapse
Affiliation(s)
- Emilia Csiszar
- Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, P.O. Box 91, Hungary.
| | - Petra Kalic
- Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, P.O. Box 91, Hungary
| | - Akos Kobol
- Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, P.O. Box 91, Hungary
| | - Eduardo de Paulo Ferreira
- Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, P.O. Box 91, Hungary
| |
Collapse
|
25
|
Santos FAD, Iulianelli GCV, Tavares MIB. The Use of Cellulose Nanofillers in Obtaining Polymer Nanocomposites: Properties, Processing, and Applications. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/msa.2016.75026] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|