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Bossa M, Monesterolo NE, Monge MDP, Rhein P, Chulze SN, Alaniz-Zanon MS, Chiotta ML. Fungal Laccases and Fumonisin Decontamination in Co-Products of Bioethanol from Maize. Toxins (Basel) 2024; 16:350. [PMID: 39195760 PMCID: PMC11359460 DOI: 10.3390/toxins16080350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2024] [Revised: 08/02/2024] [Accepted: 08/08/2024] [Indexed: 08/29/2024] Open
Abstract
Maize (Zea mays L.) may be infected by Fusarium verticillioides and F. proliferatum, and consequently contaminated with fumonisins (FBs), as well as the co-products of bioethanol intended for animal feed. Laccase enzymes have a wide industrial application such as mycotoxin degradation. The aims were to isolate and identify fungal laccase-producing strains, to evaluate laccase production, to determine the enzymatic stability under fermentation conditions, and to analyse the effectiveness in vitro of enzymatic extracts (EEs) containing laccases in degrading FB1. Strains belonging to Funalia trogii, Phellinus tuberculosus, Pleurotus ostreatus, Pycnoporus sanguineus and Trametes gallica species showed laccase activity. Different isoforms of laccases were detected depending on the evaluated species. For the FB1 decontamination assays, four enzymatic activities (5, 10, 15 and 20 U/mL) were tested, in the absence and presence of vanillic acid (VA) and 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) as redox mediators (1 and 10 mM). Trametes gallica B4-IMICO-RC EE was the most effective strain in buffer, achieving a 60% of FB1 reduction. Laccases included in EEs remained stable at different alcoholic degrees in maize steep liquor (MSL), but no significant FB1 reduction was observed under the conditions evaluated using MSL. This study demonstrate that although laccases could be good candidates for the development of a strategy to reduce FB1, further studies are necessary to optimise this process in MSL.
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Affiliation(s)
- Marianela Bossa
- Instituto de Investigación en Micología y Micotoxicología (IMICO), CONICET-Universidad Nacional de Río Cuarto (UNRC), Ruta Nacional 36 Km 601, Río Cuarto 5800, Argentina; (M.B.); (M.d.P.M.); (S.N.C.)
| | - Noelia Edith Monesterolo
- Instituto de Biotecnología Ambiental y de la Salud (INBIAS), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-Universidad Nacional de Río Cuarto (UNRC), Ruta Nacional 36 Km 601, Río Cuarto 5800, Argentina;
| | - María del Pilar Monge
- Instituto de Investigación en Micología y Micotoxicología (IMICO), CONICET-Universidad Nacional de Río Cuarto (UNRC), Ruta Nacional 36 Km 601, Río Cuarto 5800, Argentina; (M.B.); (M.d.P.M.); (S.N.C.)
| | - Paloma Rhein
- Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto (UNRC), Ruta Nacional 36 Km 601, Río Cuarto 5800, Argentina;
| | - Sofía Noemí Chulze
- Instituto de Investigación en Micología y Micotoxicología (IMICO), CONICET-Universidad Nacional de Río Cuarto (UNRC), Ruta Nacional 36 Km 601, Río Cuarto 5800, Argentina; (M.B.); (M.d.P.M.); (S.N.C.)
| | - María Silvina Alaniz-Zanon
- Instituto de Investigación en Micología y Micotoxicología (IMICO), CONICET-Universidad Nacional de Río Cuarto (UNRC), Ruta Nacional 36 Km 601, Río Cuarto 5800, Argentina; (M.B.); (M.d.P.M.); (S.N.C.)
| | - María Laura Chiotta
- Instituto de Investigación en Micología y Micotoxicología (IMICO), CONICET-Universidad Nacional de Río Cuarto (UNRC), Ruta Nacional 36 Km 601, Río Cuarto 5800, Argentina; (M.B.); (M.d.P.M.); (S.N.C.)
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Aza P, Camarero S. Fungal Laccases: Fundamentals, Engineering and Classification Update. Biomolecules 2023; 13:1716. [PMID: 38136587 PMCID: PMC10741624 DOI: 10.3390/biom13121716] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 11/17/2023] [Accepted: 11/20/2023] [Indexed: 12/24/2023] Open
Abstract
Multicopper oxidases (MCOs) share a common catalytic mechanism of activation by oxygen and cupredoxin-like folding, along with some common structural determinants. Laccases constitute the largest group of MCOs, with fungal laccases having the greatest biotechnological applicability due to their superior ability to oxidize a wide range of aromatic compounds and lignin, which is enhanced in the presence of redox mediators. The adaptation of these versatile enzymes to specific application processes can be achieved through the directed evolution of the recombinant enzymes. On the other hand, their substrate versatility and the low sequence homology among laccases make their exact classification difficult. Many of the ever-increasing amounts of MCO entries from fungal genomes are automatically (and often wrongly) annotated as laccases. In a recent comparative genomic study of 52 basidiomycete fungi, MCO classification was revised based on their phylogeny. The enzymes clustered according to common structural motifs and theoretical activities, revealing three novel groups of laccase-like enzymes. This review provides an overview of the structure, catalytic activity, and oxidative mechanism of fungal laccases and how their biotechnological potential as biocatalysts in industry can be greatly enhanced by protein engineering. Finally, recent information on newly identified MCOs with laccase-like activity is included.
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Affiliation(s)
| | - Susana Camarero
- Margarita Salas Center for Biological Research, Consejo Superior de Investigaciones Científicas (CSIC), 28040 Madrid, Spain;
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Al Faruque MA, Kiziltas A, Mielewski D, Naebe M. A Facile Approach of Fabricating Electrically Conductive Knitted Fabrics Using Graphene Oxide and Textile-Based Waste Material. Polymers (Basel) 2021; 13:3003. [PMID: 34503044 PMCID: PMC8434548 DOI: 10.3390/polym13173003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 08/31/2021] [Accepted: 09/02/2021] [Indexed: 11/17/2022] Open
Abstract
This research investigated a feasible approach to fabricating electrically conductive knitted fabrics using previously wet-spun wool/polyacrylonitrile (PAN) composite fibre. In the production of the composite fibre, waste wool fibres and PAN were used, whereby both the control PAN (100% PAN) and wool/PAN composite fibres (25% wool) were knitted into fabrics. The knitted fabrics were coated with graphene oxide (GO) using the brushing and drying technique and then chemically reduced using hydrazine to introduce the electrical conductivity. The morphological study showed the presence of GO sheets wrinkles on the coated fabrics and their absence on reduced fabrics, which supports successful coating and a reduction of GO. This was further confirmed by the colour change properties of the fabrics. The colour strength (K/S) of the reduced control PAN and wool/PAN fabrics increased by ~410% and ~270%, and the lightness (L*) decreased ~65% and ~71%, respectively, compared to their pristine fabrics. The Fourier transform infrared spectroscopy showed the presence and absence of the GO functional groups along with the PAN and amide groups in the GO-coated and reduced fabrics. Similarly, the X-ray diffraction analysis exhibited a typical 2θ peak at 10⁰ that represents the existence of GO, which was demolished after the reduction process. Moreover, the wool/PAN/reduced GO knitted fabrics showed higher electrical conductivity (~1.67 S/cm) compared to the control PAN/reduced GO knitted fabrics (~0.35 S/cm). This study shows the potential of fabricating electrically conductive fabrics using waste wool fibres and graphene that can be used in different application fields.
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Affiliation(s)
- Md Abdullah Al Faruque
- Institute for Frontier Materials (IFM), Deakin University, Geelong, VIC 3216, Australia;
| | - Alper Kiziltas
- Research and Innovation Center, Ford Motor Company, Dearborn, MI 48121, USA; (A.K.); (D.M.)
| | - Deborah Mielewski
- Research and Innovation Center, Ford Motor Company, Dearborn, MI 48121, USA; (A.K.); (D.M.)
| | - Maryam Naebe
- Institute for Frontier Materials (IFM), Deakin University, Geelong, VIC 3216, Australia;
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Song Y, Jiang J, Qin W, Li J, Zhou Y, Gao Y. Enhanced transformation of organic pollutants by mild oxidants in the presence of synthetic or natural redox mediators: A review. WATER RESEARCH 2021; 189:116667. [PMID: 33271411 DOI: 10.1016/j.watres.2020.116667] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 11/06/2020] [Accepted: 11/21/2020] [Indexed: 06/12/2023]
Abstract
Synthetic or natural mediators (Med) can enhance the transformation of different types of organic pollutants by mild oxidants, which has been extensively studied in literature. This enhancing effect is attributed to the following two steps: (i) mild oxidants react with Med forming Medox with higher reactivity, and then (ii) these organic pollutants are more readily transformed by Medox. The present work reviews the latest findings on the formation of Medox from the reactions of synthetic (i.e., 2,2'-azino-bis(3-ethylbenzothiazoline)-6-sulfonate (ABTS) and 1-hydroxybenzotriazole (HBT)) or natural mediators (i.e., syringaldehyde (SA), acetosyringone (AS), p-coumaric acid, and catechol) with mild oxidants such as laccase, manganese oxidants including permanganate (Mn(VII)) and MnO2, and ferrate (Fe(VI)), as well as the transformation of organic pollutants including phenols, amines, polycyclic aromatic hydrocarbons (PAHs), organic dyes, pulp, and perfluoroalkyl acids (PFAAs) by Medox. First, reaction kinetics and mechanisms of the oxidation of synthetic or natural mediators by these mild oxidants were summarized. Reactivity and pathways of synthetic Medox including ABTS·+, ABTS2+, HBT· or natural Medox including phenoxy radicals and quinone-type compounds reacting with different organic pollutants were then discussed. Finally, the possibilities of engineering applications and new perspectives were assessed on the combinations of different types of mild oxidants with synthetic or natural mediators for the treatment of various organic pollutants.
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Affiliation(s)
- Yang Song
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China
| | - Jin Jiang
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, Guangdong, China.
| | - Wen Qin
- School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China
| | - Juan Li
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, Guangdong, China
| | - Yang Zhou
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, Guangdong, China
| | - Yuan Gao
- Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, Guangdong, China
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Zhao Z, Song C, Zhou J, Hu R, Xiao H, Liu Y, Lu M. An eco‐friendly method based on the self‐glue effect of keratins for preparing Fe
3
O
4
‐coated wool. J Appl Polym Sci 2020. [DOI: 10.1002/app.49179] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zhenyun Zhao
- College of Textile & GarmentSouthwest University Chongqing China
| | - Chi Song
- Department of Life Science and TechnologyChangshu Institute of Technology Changshu Jiangsu China
| | - Jing Zhou
- College of Textile & GarmentSouthwest University Chongqing China
| | - Ruimin Hu
- College of Textile & GarmentSouthwest University Chongqing China
| | - Hang Xiao
- College of Textile & GarmentSouthwest University Chongqing China
- State Key Laboratory of Silkworm Genome BiologySouthwest University Chongqing China
- Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile Chongqing China
| | - Yiping Liu
- College of Textile & GarmentSouthwest University Chongqing China
- State Key Laboratory of Silkworm Genome BiologySouthwest University Chongqing China
- Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile Chongqing China
| | - Ming Lu
- College of Textile & GarmentSouthwest University Chongqing China
- State Key Laboratory of Silkworm Genome BiologySouthwest University Chongqing China
- Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile Chongqing China
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Su X, Zhu G, Song X, Xu H, Li W, Ning X, Chen Q, Guo W. Genome-wide association analysis reveals loci and candidate genes involved in fiber quality traits in sea island cotton (Gossypium barbadense). BMC PLANT BIOLOGY 2020; 20:289. [PMID: 32571222 PMCID: PMC7310526 DOI: 10.1186/s12870-020-02502-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 06/17/2020] [Indexed: 05/13/2023]
Abstract
BACKGROUND Sea island cotton (Gossypium barbadense) has markedly superior high quality fibers, which plays an important role in the textile industry and acts as a donor for upland cotton (G. hirsutum) fiber quality improvement. The genetic characteristics analysis and the identification of key genes will be helpful to understand the mechanism of fiber development and breeding utilization in sea island cotton. RESULTS In this study, 279 sea island cotton accessions were collected from different origins for genotyping and phenotyping fiber quality traits. A set of 6303 high quality single nucleotide polymorphisms (SNPs) were obtained by high-density CottonSNP80K array. The population characteristics showed that the sea island cotton accessions had wide genetic diversity and were clustered into three groups, with Group1 closely related to Menoufi, an original sea island cotton landrace, and Group2 and Group3 related to widely introduced accessions from Egypt, USA and Former Soviet Union. Further, we used 249 accessions and evaluated five fiber quality traits under normal and salt environments over 2 years. Except for fiber uniformity (FU), fiber length (FL) and fiber elongation (FE) were significantly decreased in salt conditions, while fiber strength (FS) and fiber micronaire (MIC) were increased. Based on 6303 SNPs and genome-wide association study (GWAS) analysis, a total of 34 stable quantitative trait loci (QTLs) were identified for the five fiber quality traits with 25 detected simultaneously under normal and salt environments. Gene Ontology (GO) analysis indicated that candidate genes in the 25 overlapped QTLs were enriched mostly in "cellular and biological process". In addition, "xylem development" and "response to hormone" pathways were also found. Haplotype analyses found that GB_A03G0335 encoding an E3 ubiquitin-protein ligase in QTL TM6004 had SNP variation (A/C) in gene region, was significantly correlated with FL, FS, FU, and FE, implying a crucial role in fiber quality. CONCLUSIONS The present study provides a foundation for genetic diversity of sea island cotton accessions and will contribute to fiber quality improvement in breeding practice.
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Affiliation(s)
- Xiujuan Su
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Engineering Research Center of Hybrid Cotton Development (the Ministry of Education), Nanjing Agricultural University, Nanjing, 210095 China
- Engineering Research Center for Cotton (the Ministry of Education), Xinjiang Agricultural University, Urumqi, 830052 China
| | - Guozhong Zhu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Engineering Research Center of Hybrid Cotton Development (the Ministry of Education), Nanjing Agricultural University, Nanjing, 210095 China
| | - Xiaohui Song
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Engineering Research Center of Hybrid Cotton Development (the Ministry of Education), Nanjing Agricultural University, Nanjing, 210095 China
| | - Haijiang Xu
- Institute of Industrial Crops, Xinjiang Academy of Agricultural Sciences, Urumqi, 830091 China
| | - Weixi Li
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Engineering Research Center of Hybrid Cotton Development (the Ministry of Education), Nanjing Agricultural University, Nanjing, 210095 China
| | - Xinzhu Ning
- Cotton Research Institute, Xinjiang Academy of Agricultural and Reclamation Science, Shihezi, 832000 China
| | - Quanjia Chen
- Engineering Research Center for Cotton (the Ministry of Education), Xinjiang Agricultural University, Urumqi, 830052 China
| | - Wangzhen Guo
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Engineering Research Center of Hybrid Cotton Development (the Ministry of Education), Nanjing Agricultural University, Nanjing, 210095 China
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Shim E, Noro J, Cavaco-Paulo A, Kim HR, Silva C. Carboxymethyl Cellulose (CMC) as a Template for Laccase-Assisted Oxidation of Aniline. Front Bioeng Biotechnol 2020; 8:438. [PMID: 32478056 PMCID: PMC7240045 DOI: 10.3389/fbioe.2020.00438] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 04/16/2020] [Indexed: 11/29/2022] Open
Abstract
Polyaniline (PANi) is a conducting polymer which has been subject of intensive research on the exploitation of new products and applications. The main aim of the work is the development of a conductive bacterial cellulose (BC)-based material by enzymatic-assisted polymerization of aniline. For this, we study the role of carboxymethyl cellulose (CMC) as a template for the in situ polymerization of aniline. Bacterial cellulose was used as the supporting material for the entrapment of CMC and for the in situ oxidation reactions. The amount of CMC entrapped inside BC was optimized as well as the conditions for laccase-assisted oxidation of aniline. The new oligomers were evaluated by spectrometric techniques, namely 1H NMR and MALDI-TOF, and the functionalized BC surfaces were analyzed by thermogravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM), and reflectance spectrophotometry. The conductivity of the developed materials was evaluated using the four-probe methodology. The oligomers obtained after reaction in the presence of CMC as template display a similar structure as when the reaction is conducted only in BC. Though, after oxidation in the presence of this template, the amount of oligomers entrapped inside BC/CMC is considerably higher conferring to the material greater electrical conductivity and coloration. The use of CMC as a template for aniline oxidation on BC seems to be a promising and cheap strategy to improve the yield of functionalization and increment the properties of the materials, namely electrical conductivity and coloration.
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Affiliation(s)
- Euijin Shim
- Department of Clothing and Textiles, Sookmyung Women’s University, Seoul, South Korea
| | - Jennifer Noro
- Centre of Biological Engineering, University of Minho, Campus of Gualtar, Braga, Portugal
| | - Artur Cavaco-Paulo
- Centre of Biological Engineering, University of Minho, Campus of Gualtar, Braga, Portugal
- International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, Wuxi, China
| | - Hye Rim Kim
- Department of Clothing and Textiles, Sookmyung Women’s University, Seoul, South Korea
| | - Carla Silva
- Centre of Biological Engineering, University of Minho, Campus of Gualtar, Braga, Portugal
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Schmidt BVKJ. Trends in Polymers 2017/2018: Polymer Synthesis. Polymers (Basel) 2019; 12:E39. [PMID: 31881763 PMCID: PMC7023566 DOI: 10.3390/polym12010039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 12/22/2019] [Indexed: 12/25/2022] Open
Abstract
Polymer synthesis is a substantial area in polymer science and marks the starting point for all sorts of polymer materials that have a plethora of applications in everyday life but also in academic research [...].
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Shim E, Noro J, Cavaco-Paulo A, Silva C, Kim HR. Effect of Additives on the in situ Laccase-Catalyzed Polymerization of Aniline Onto Bacterial Cellulose. Front Bioeng Biotechnol 2019; 7:264. [PMID: 31681744 PMCID: PMC6812606 DOI: 10.3389/fbioe.2019.00264] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Accepted: 09/26/2019] [Indexed: 11/13/2022] Open
Abstract
Laccase-mediated systems are a green route to accelerate the oxidation of aniline and obtain polyaniline with conductive properties. The synthesis of green polyaniline (emeraldine salt) was herein improved by the inclusion of additives like sodium bis (2-ethyl hexyl) sulfosuccinate (AOT) and potassium hexacyanoferrate (II) (KHCF) in the medium. The aniline polymerization was confirmed by the detection of the absorption band typical of emeraldine salt at 420 nm, typical of the semiquinoid radical cation, and of the polaron absorption band at 700-800 nm, corresponding to the distinctive signal of doped or partial doped aniline. The oligomers and/or polymers obtained were characterized by spectrometry techniques, namely 1H NMR and MALDI-TOF, and the bacterial cellulose (BC) conductivity was assessed by means of a four-point probe electrical conductivity technique. The best polymerization results were obtained with 5 mM AOT, 10 mM KHCF, and 25 U/mL of laccase. The synergistic effect between both additives in the presence of a catalyst leads to obtaining BC samples coated with green polyaniline with promising electric conductive properties.
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Affiliation(s)
- Euijin Shim
- Department of Clothing and Textiles, Sookmyung Women's University, Seoul, South Korea
| | - Jennifer Noro
- International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, Wuxi, China
| | - Artur Cavaco-Paulo
- International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, Wuxi, China.,Centre of Biological Engineering, University of Minho, Campus of Gualtar, Braga, Portugal
| | - Carla Silva
- Centre of Biological Engineering, University of Minho, Campus of Gualtar, Braga, Portugal
| | - Hye Rim Kim
- Department of Clothing and Textiles, Sookmyung Women's University, Seoul, South Korea
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Walde P, Kashima K, Ćirić-Marjanović G. Synthesizing Polyaniline With Laccase/O 2 as Catalyst. Front Bioeng Biotechnol 2019; 7:165. [PMID: 31355193 PMCID: PMC6635843 DOI: 10.3389/fbioe.2019.00165] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 06/24/2019] [Indexed: 11/13/2022] Open
Abstract
The polymerization of aniline to polyaniline (PANI) can be achieved chemically, electrochemically or enzymatically. In all cases, the products obtained are mixtures of molecules which are constituted by aniline units. Depending on the synthesis conditions there are variations (i) in the way the aniline molecules are connected, (ii) in the average number of aniline units per molecule, (iii) in the oxidation state, and (iv) in the degree of protonation. For many possible applications, the synthesis of electroconductive PANI with para-N-C-coupled aniline units in their half-oxidized and protonated state is of interest. This is the emeraldine salt form of PANI, abbreviated as PANI-ES. The enzymatic synthesis of PANI-ES is an environmentally friendly alternative to conventional chemical or electrochemical methods. Although many studies have been devoted to the in vitro synthesis of PANI-ES by using heme peroxidases with added hydrogen peroxide (H2O2) as the oxidant, the application of laccases is of particular interest since the oxidant for these multicopper enzymes is molecular oxygen (O2) from air, which is beneficial from environmental and economic points of view. In vivo, laccases participate in the synthesis and degradation of lignin. Various attempts of synthesizing PANI-ES with laccase/O2 in slightly acidic aqueous media from aniline or the linear aniline dimer PADPA (p-aminodiphenylamine) are summarized. Advances in the understanding of the positive effects of soft dynamic templates, as chemical structure guiding additives (anionic polyelectrolytes, micelles, or vesicles), for obtaining PANI-ES-rich products are highlighted. Conceptually, some of these template effects appear to be related to the effect "dirigent proteins" exert in the biosynthesis of lignin. In both cases intermediate radicals are formed enzymatically which then must react in a controlled way in follow-up reactions for obtaining the desired products. These follow-up reactions are controlled to some extent by the templates or specific proteins.
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Affiliation(s)
- Peter Walde
- Laboratory for Multifunctional Materials, Department of Materials, ETH, Zurich, Switzerland
| | - Keita Kashima
- Laboratory for Multifunctional Materials, Department of Materials, ETH, Zurich, Switzerland
- Department of Chemistry and Bioengineering, National Institute of Technology, Oyama College, Oyama, Japan
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Shim E, Su J, Noro J, Teixeira MA, Cavaco-Paulo A, Silva C, Kim HR. Conductive bacterial cellulose by in situ laccase polymerization of aniline. PLoS One 2019; 14:e0214546. [PMID: 30986238 PMCID: PMC6464183 DOI: 10.1371/journal.pone.0214546] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 03/14/2019] [Indexed: 11/23/2022] Open
Abstract
Conductive and colored bacterial cellulose (BC) was developed by entrapment of polyaniline (PANi) onto dry BC membranes. The polyaniline was produced by in situ green polymerization of aniline by Myceliophthora thermophila laccase at pH = 4, 25°C, in the presence of a mediator, 1-hydroxybenzotriazol (HBT), using two different reactors, a water bath (WB) and an ultrasonic bath (US). MALDI-TOF and 1H NMR characterization of the experiment solutions confirmed the efficient polymerization of aniline by laccase. The dried BC membranes with entrapped polyaniline showed electrical conductive behavior and strong coloration, opening novel routes for the exploitation of functionalized bacterial cellulose as a green material for technical textiles, wearables, and other applications.
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Affiliation(s)
- Euijin Shim
- Department of Clothing and Textiles, Sookmyung Women’s University, Yongsan-gu, Seoul, South Korea
| | - Jing Su
- International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, Wuxi, China
- Centre of Biological Engineering, University of Minho, Campus of Gualtar, Braga, Portugal
| | - Jennifer Noro
- Centre of Biological Engineering, University of Minho, Campus of Gualtar, Braga, Portugal
| | - Marta A. Teixeira
- Department of Textile Engineering, Campus of Azurém, Guimarães, Portugal
| | - Artur Cavaco-Paulo
- International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, Wuxi, China
- Centre of Biological Engineering, University of Minho, Campus of Gualtar, Braga, Portugal
| | - Carla Silva
- Centre of Biological Engineering, University of Minho, Campus of Gualtar, Braga, Portugal
| | - Hye Rim Kim
- Department of Clothing and Textiles, Sookmyung Women’s University, Yongsan-gu, Seoul, South Korea
- Research Institute of ICT Convergence, Sookmyung Women’s University, Seoul, Korea
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