Constructing 3D bacterial cellulose/graphene/polyaniline nanocomposites by novel layer-by-layer in situ culture toward mechanically robust and highly flexible freestanding electrodes for supercapacitors

Luo, Honglin; Dong, Jiaojiao; Zhang, Yang; Li, Gen; Guo, Ruisong; Zuo, Guifu; Ye, Meidan; Wang, Zheren; Yang, Zhiwei; Wan, Yizao

doi:10.1016/j.cej.2017.11.065

Cited by 146 publications

(83 citation statements)

References 74 publications

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“…Among the most promising developments highlighted in the review were stretchable 3D conductive carbon nanofiber networks based on multi-walled carbon nanotubes (MWCNT) incorporated into BNC pellicles, first described by Yoon et al [170]. One of the latest developments in this very promising field of research are conductive nanocomposite BNC-membranes, which contain polyaniline and highly dispersed graphene (GE) [171]. The authors reported excellent electrochemical performance of the BNC/GE/PANI electrodes and explained their findings with the unique 3D porous structure and the uniform distribution of GE nanosheets and PANI in the BNC matrix, which makes it especially promising for future flexible energy storage devices.…”

Section: Recent Developments In Bnc Materialsmentioning

confidence: 99%

Nanocellulose as a natural source for groundbreaking applications in materials science: Today’s state

et al. 2018

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Nanocelluloses are natural materials with at least one dimension in the nano-scale. They combine important cellulose properties with the features of nanomaterials and open new horizons for materials science and its applications. The field of nanocellulose materials is subdivided into three domains: biotechnologically produced bacterial nanocellulose hydrogels, mechanically delaminated cellulose nanofibers, and hydrolytically extracted cellulose nanocrystals. This review article describes today's state regarding the production, structural details, physicochemical properties, and innovative applications of these nanocelluloses. Promising technical applications including gels/foams, thickeners/stabilizers as well as reinforcing agents have been proposed and research from last five years indicates new potential for groundbreaking innovations in the areas of cosmetic products, wound dressings, drug carriers, medical implants, tissue engineering, food and composites. The current state of worldwide commercialization and the challenge of reducing nanocellulose production costs are also discussed.

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Section: Recent Developments In Bnc Materialsmentioning

confidence: 99%

Nanocellulose as a natural source for groundbreaking applications in materials science: Today’s state

et al. 2018

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“…The N-sM-F BC/CA scaffold was prepared by the MLIC method. The detailed process was reported in our previous studies [16][17][18]. Briefly, a BC pellicle around 1 mm in thickness was first prepared by conventional static culture method.…”

Section: Preparation Of N-sm-f Bc/ca Scaffoldmentioning

confidence: 99%

“…The submicrofibrous CA scaffold was first prepared by electrospinning technique. The BC nanofibers were then totally impregnated into the submicrofibrous template using a modified in situ biosynthesis process, namely a membrane-liquid interface culture (MLIC) method [16][17][18][19]. The asprepared N-sM-F BC/CA scaffold shows interpenetrated nano (42 nm) and submicron (820 nm) fibrous structure.…”

Section: Introductionmentioning

confidence: 99%

Interpenetrated nano- and submicro-fibrous biomimetic scaffolds towards enhanced mechanical and biological performances

Luo

Gan

Gama

et al. 2020

Materials Science and Engineering: C

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Developing fibrous scaffolds with hierarchical structures that closely mimic natural extracellular matrix (ECM) is highly desirable. However, fabricating scaffolds with true nanofibers (< 100 nm) and submicrofibers (< 1 μm) remains a big challenge. In this work, to mimic the fibrillar structure of natural ECM, bacterial cellulose (BC) nanofibers were hybridized with cellulose acetate (CA) submicrofibers for the first time. The interpenetrated nano-submicron fibrous BC/CA scaffold was fabricated using the combined electrospinning and modified in situ biosynthesis method. The BC/CA scaffold has an integrated symmetrical nanostructure in which BC nanofibers (42 nm in diameter) penetrate into the submicrofibrous CA (820 nm in diameter) scaffold. The BC/CA scaffold shows an interconnected porous structure with a high porosity of > 90%. Additionally, the combination of CA submicrofibers with BC nanofibers leads to significantly improved mechanical properties over nanofibrous BC and submicrofibrous CA scaffolds and enlarged pores over nanofibrous BC scaffold. In addition, the biological behaviors of prepared BC/CA on MC3T3-E1 cells were investigated. Results suggested that BC/CA scaffold is beneficial for cell migration and proliferation. Moreover, the BC/CA scaffold shows higher alkaline phosphatase (ALP) activity, and calcium depositions. In addition, the hierarchical structures can effectively improve the expression of osteogenic gene (ALP mRNA and Runx2 mRNA) and protein (ALP). We believe that the methodology might provide biomimetic morphological microenvironments for enhanced tissue regeneration.

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“…These cell residues as well as other impurities such as organic acids, salts as well as residual sugars and other components in the culture medium should be removed. Although many methods are employed such as washing, centrifugation, filtration, and chemical extraction [4], washing BC with hot NaOH solution is the most commonly used [4][5][6][7][8][9][10][11]. The effect of NaOH treatment on structure and mechanical properties of BC has been reported [8,12].…”

Section: Introductionmentioning

confidence: 99%

Biofabrication of a novel bacteria/bacterial cellulose composite for improved adsorption capacity

Wan

Wang

Gama

et al. 2019

Composites Part A: Applied Science and Manufacturing

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A B S T R A C TConventional fabrication of bacterial cellulose (BC) involves treatment with hot NaOH aqueous solutions to remove bacteria (BA). Herein, we report a simpler and cheaper method for the preparation of BA/BC composite without alkalization, which keeps the BA in the nanofibrous BC network. Scanning electron microscopy (SEM) observation showed naturally distributed BA in BC matrix with a tightly entangled structure. Such BA-embedded BA/BC composite exhibited improved mechanical strength and modulus over BC. When used as adsorbent, the BA/BC composite exhibited significantly higher adsorption capacities to Pb(II), Cu(II), Ni(II), and Cr(VI) compared to bare BC. The much higher adsorption capacities of BA/BC are due to the presence of functional groups in the BA, such as amide, which are known to be involved in coordination interaction. This breakthrough strategy not only made the fabrication process simpler and more cost-effective, but also produced a new BCbased adsorbent with improved adsorption capacity to heavy metals.

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Constructing 3D bacterial cellulose/graphene/polyaniline nanocomposites by novel layer-by-layer in situ culture toward mechanically robust and highly flexible freestanding electrodes for supercapacitors

Cited by 146 publications

References 74 publications

Nanocellulose as a natural source for groundbreaking applications in materials science: Today’s state

Nanocellulose as a natural source for groundbreaking applications in materials science: Today’s state

Interpenetrated nano- and submicro-fibrous biomimetic scaffolds towards enhanced mechanical and biological performances

Biofabrication of a novel bacteria/bacterial cellulose composite for improved adsorption capacity

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