Bionanocomposites from electrospun PVA/pineapple nanofibers/Stryphnodendron adstringens bark extract for medical applications

Costa, Lígia Maria Manzine; Olyveira, Gabriel Molina de; Cherian, Bibin Mathew; Leão, Alcides Lopes; Souza, Sivoney Ferreira de; Ferreira, M.

doi:10.1016/j.indcrop.2012.04.025

Cited by 75 publications

(22 citation statements)

References 20 publications

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“…Such nanocomposites may react to match the natural environment moisture of a wound surface and eventually lead to accelerated wound healing. The electrospun PVA/nanocellulose containing stryphnodendron adstringens bark extract with improved biological properties might be suitable for medical implants [73]. Highly porous scaffolds with good pore-interconnectivity were produced based on ovalbumin/PVA reinforced with unmodified and -NH 2 modified nanocellulose cross-linked with glutaraldehyde via freeze-drying process [74].…”

Section: Applicationsmentioning

confidence: 99%

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A Review of Natural Fiber Reinforced Poly(Vinyl Alcohol) Based Composites: Application and Opportunity

et al. 2015

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Natural fibers are fine examples of renewable resources that play an important role in the composites industry, which produces superior strength comparable to synthetic fibers. Poly(vinyl alcohol) (PVA) composites in particular have attracted enormous interest in view of their satisfactory performance, properties and biodegradability. Their performance in many applications such as consumer, biomedical, and agriculture is well defined and promising. This paper reviews the utilization of natural fibers from macro to nanoscale as reinforcement in PVA composites. An overview on the properties, processing methods, biodegradability, and applications of these composites is presented. The advantages arising from chemical and physical modifications of fibers or composites are discussed in terms of improved properties and performance. In addition, proper arrangement of nanocellulose in composites helps to prevent agglomeration and results in a better dispersion. The limitations and challenges of the composites and future works of these bio-composites are also discussed. This review concludes that PVA composites have potential for use in numerous applications. However, issues on technological feasibility, environmental effectiveness, and economic affordability should be considered.

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Section: Applicationsmentioning

confidence: 99%

“…Previous literature has shown the reinforcement of micro-and nanocellulose in PVA composites for consumer and medical applications [26,42,72,73,86]. However, the agglomeration of nanocellulose could be a limitation to their wider applications.…”

Section: Challenges and Future Aspectsmentioning

confidence: 99%

A Review of Natural Fiber Reinforced Poly(Vinyl Alcohol) Based Composites: Application and Opportunity

et al. 2015

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“…The thermal depolymerization of hemicellulose and the cleavage of the glycosidic linkages of cellulose polymers occurred at a low temperature region ranging from 220 °C to 300 °C (Costa et al 2013). The complete degradation of cellulose took place between 275 °C and 400 °C (Deepa et al 2011;Costa et al 2013). The increase in the onset temperature corresponded to the removal of hemicellulose, which could occur at a low temperature, before the degradation of cellulose (Mohtar et al 2015).…”

Section: Thermal Propertiesmentioning

confidence: 99%

Section: Thermal Propertiesmentioning

confidence: 99%

Microscopic Structural Features and Properties of Single Fibers from Different Morphological Parts of the Windmill Palm

Chen¹,

Sun²,

Chen³

et al. 2017

BioResources

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The chemical, morphological, physical, and thermal properties of raw materials and single fibers extracted from different morphological parts of windmill palm were examined and comprehensively characterized after an alkali treatment. Leaf sheathes (LS) with the highest cellulose content (52.26%) achieved the most efficient extraction of fibers. Single fibers extracted from the vascular bundles of the windmill palm raw material had a slender shape with a tapering and sealing terminus, with each single fiber possessing a lumen in its cross-section. These windmill palm fibers displayed similar chemical compositions, but they exhibited significant differences in morphological parameters. Leaf blade fibers (LBFs) had the longest length (1240 μm ± 470 μm) and highest aspect ratio (121.39), which presented excellent potential as a reinforced fiber. After the alkali treatment, almost all of the hemicelluloses and lignin were removed, which resulted in increased crystallinity of extracted fibers. Thermogravimetric analysis confirmed LS stability up to 319 °C, which was higher than that of other materials from windmill palm.

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“…不仅可将多种合成和天然聚合物电纺成单一纳米纤维 [2,3] , 还可以得到复合纳米纤维材料, 例如同轴纺丝 [4] 、三轴纺丝 [5,6] 、多层交叉纺丝等 [7～9] 技术的应用, 推动了该技术的快速发展. 由于纳米纤维材料性能的优良特性, 在膜过滤器 [10,11] 、组织工程支架 [12,13] 、生物工程 [14] 、临床医学 [15,16] 、超敏传感器 [17,18] 、锂电池材料 [19] 和超级电容器 [20] 等方面具有巨大的研究价值. 然而, 目前能进行静电纺丝的常用聚合物种类还相对较少, 主要集中在聚乙烯醇(PVA) [21,22] 、聚丙烯腈(PAN) [23,24] 、聚乙烯吡咯烷酮 (PVP) [5,6,25] 等, 而对多糖类物质和天然聚合物的静电纺丝研究一直是该领域的难点 [26～28] , 极度限制了静电纺丝研究的进一步发展.…”

Section: 引言unclassified

Study on Synthesis, Rheological and Electrospinning Functional Materials of Carboxymethyl Cellulose Lithium (CMC-Li)

邱磊¹,

邵自强²,

王建全³

et al. 2013

Acta Chim. Sinica

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The study on electrospinning of natural polysaccharide polymer to be nano-crystallized is still difficult in the current time. Carboxymethyl cellulose sodium (CMC-Na) was successfully synthesized and acidized to obtain carboxymethyl cellulose hydrogen (CMC-H), and new ionic cellulose ether CMC-Li was synthesized by alkalization, and then we analyzed the difference of structure between the three products. By comparing the rheological measurement and analysis of CMC-Na and CMC-Li, which have different mass fractions, it is found that they both show the characteristics of non-Newtonian fluid. The non-Newtonian index of CMC-Li is lower than that of CMC-Na when the degree of substitution (DS) and viscosity of both is similar. For the same material, the ionic cellulose ether solution of lower DS and higher concentration shows the lower non-Newtonian index. For the structure and property characteristic of polymers, it was easy to combine them with water-soluble hydroxyl terminated high molecular weight polyethylene oxide (PEO) to allocate the excellent electrospinning solution. Processing conditions were adjusted to a flow rate of 4 mL/h, an applied voltage of 25 kV, the spinning distance of 12 cm, the better appearance of nanofibers whose average diameter is about 70 nm can be obtained. In the process of electrospinning, hydroxyl lithium ester enolates was obtained by reductive reaction of the ionized Li ＋ with active hydroxyl, which caused the molecular structure to be destroyed. CMC-Li showed the exceptional Non-Newtonian fluid properties and had the better spinning performance than CMC-Na. When the surface tension of liquid was damaged by external electric force of spinning voltage to balance each other, the obtained morphology of the fiber was better. Nano-aluminum powder is coated with CMC-Li to form composite nanofibers, and carbonized at the high temperatures. Al/CNF/Li composite fiber was obtained in which nano particles were uniformly distributed. We preliminarily studied the obtained composite material that remained morphology and structure of fiber, which lays the foundation for the later research that the material is applied to soluble membrane, tissue engineering scaffolds, biological medicine, lithium battery and super capacitor, etc. The satisfactory effects have been achieved through analysis of IR, Rheology and SEM. The paper expands the type of polysaccharide polymer that can be electrospun and filled the void of related research, and it also lays the foundation for the study on nano functional materials of new ionic cellulose ether.

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Bionanocomposites from electrospun PVA/pineapple nanofibers/Stryphnodendron adstringens bark extract for medical applications

Cited by 75 publications

References 20 publications

A Review of Natural Fiber Reinforced Poly(Vinyl Alcohol) Based Composites: Application and Opportunity

A Review of Natural Fiber Reinforced Poly(Vinyl Alcohol) Based Composites: Application and Opportunity

Microscopic Structural Features and Properties of Single Fibers from Different Morphological Parts of the Windmill Palm

Study on Synthesis, Rheological and Electrospinning Functional Materials of Carboxymethyl Cellulose Lithium (CMC-Li)

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