Quantitative relationship between electrospinning parameters and starch fiber diameter

Kong, Lingyan; Ziegler, Gregory R.

doi:10.1016/j.carbpol.2012.09.026

Cited by 111 publications

(56 citation statements)

References 8 publications

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“…The applied voltage and the distance between the spinneret and the collector directly determine the strength of the electric field, which pulls the tiny jet out of the Taylor cone. Generally, a higher electric field will drive more fluid in the jet [34] and cause a larger electrostatic force that stretches the nanofibers [56]. However, when the strength of the electric field is too low, the jet is only intermittently drawn from the spinneret.…”

Section: Other System Parametersmentioning

confidence: 99%

“…Besides electric and magnetic fields, alignment of electrospun nanofibers could also be guided by the [54][55][56] relative motion between the spinneret and the collector. Different from the grounded paired electrodes, which align nanofibers over a small area on a 2D substrate, electrospun nanofibers are collected on a grounded rotating cylinder [67][68][69][70][71], as shown in Figure 3a.…”

Section: Alignment Of Nanofibers Guided By the Motion Of Collectormentioning

confidence: 99%

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Functional Nanofibers with Multiscale Structure by Electrospinning

et al. 2018

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diameters, compositions and orientations. In addition, the flexibility of electrospinning allows for controlling the structure (e.g. hollow fibers) and arrangement (e.g. well-ordered fiber arrays) of the fibers so that nanofibers of desired properties can be fabricated depending on the intended applications.The diameters of electrospun fibers can be easily varied from tens of nanometers to microns, and thus the fibers possess extremely high surface-to-volume ratio, making them suitable for activities requiring a high degree of physical contact, such as providing sites for chemical reactions. Membranes consisted of electrospun fibers possess relatively uniform pore size distribution and significantly high porosity and thus are good filter to capture small-sized particulates by physical entrapment [22,23,[27][28][29]. In addition, the nanofibers fabricated by electrospinning possess a relatively defect-free structure at the molecular scale, showing enhanced mechanical properties. Because of these advantages, electrospun fibers have been widely used in various applications. For example, in biomedical applications, by using biocompatible materials, electrospun fibrous scaffold have been considered as suitable substrates for tissue engineering [13][14][15][16] and artificial blood vessels [18], and also used to study the differentiation of stem cell [24]. While in the field of electromechanics, various sensors, such as tactile sensors [8,9], chemical sensors [3,5,6,10,11,17,19] and optical sensors [12], are using electrospun fibers as substrates or sensing elements.In this review, we provide an overview of electrospinning technologies, which have been developed to prepare nanofibers of different materials, ranging from inorganic ceramics to organic polymers, and systematically summarize the techniques to adjust the system parameters and thus tailor the properties of the fibers, including the fiber diameter and its surface morphology. We also highlight the advance of electrospinning techniques in creating complex structures with desired properties, such as well-aligned fiber arrays and specifically patterned fiber structure on the collector. Construction of nanofibers with more complex internal structure, such as corehttps://doi.org/10.1515/nanofab-2018-0002Received December 21, 2017; accepted March 19, 2018 Abstract: Electrospinning can produce nanofibers with extremely high surface-to-volume ratio and well tunable properties. The technique has been widely used in different disciplines. To fabricate fibers with required properties, parameters of fabrication should be well controlled and adjusted according to specific applications. Modification of electrospinning devices to align fibers in highly ordered architectures could improve their functions. Enhanced efficiency have also been obtained through the upscaling modification of spinnerets. With the outstanding efficiency, electrospinning has exhibited huge potentials to construct various nanostructures, such as artificial vessel, membrane for desalination and so on.

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Section: Other System Parametersmentioning

confidence: 99%

Section: Alignment Of Nanofibers Guided By the Motion Of Collectormentioning

confidence: 99%

Functional Nanofibers with Multiscale Structure by Electrospinning

et al. 2018

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“…While starch gelatinization is expected to occur below 100 °C (heating temperature of our starch dispersions) the transition from an helical to random coil conformation of starch molecules, which favors fiber formation, will only occur ~160 °C [12]. For this reason, native starch fibers have only been obtained by electro-wet-spinning technology from DMSO solutions [10,11,12,13] while electrospinning has only been possible using starch derivatives [15,34] or starch blends with synthetic polymers [29,30].…”

Section: Correlation Between Rheology and Fiber Formationmentioning

confidence: 99%

Investigation on Photoluminescence Behaviour of 2, 3-Diphenylquinoxalin-6-Vinyl Benzaldehyde

Padma¹,

Sathiya²,

Guhanathan³

2017

SOJMSE

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Open Access Research Articlesuccess of electrospinning will rely on the proper optimization of several process parameters including flow rate of spinning solution, applied voltage and distance from the needle tip to the fiber collector, as well as relevant solution properties such as viscosity, viscoelasticity, concentration, electrical conductivity and surface tension [6,14,28].Food-grade hydrocolloids of commercial importance include polysaccharides (natural carbohydrate polymers) and proteins. Food-grade hydrocolloids, alone or combined, are widely used by the food industry to improve texture, processing conditions and the overall quality of food products [3,17]. Processing hydrocolloids by electrospinning is often challenging since most of these compounds show inadequate or limited spinnability [28].Starch and guar gum are two cost-attractive hydrocolloids often used together in food formulations [8]. Starch is present in plants as semi crystalline granules which shape, size, morphology and composition (e.g. amylose/amylopectin ratio) will depend on the starch source and cultivation conditions [3,13]. The granules are composed of amylose or (1→4)-linked α-glucopyranose, a linear macromolecule responsible for starch's gelling properties [18], and amylopectin or (1→4)-linked α-glucopyranose with α-(1→6) branch linkages, a highly branched component that may form very weak gels [20]. Guar Gum (GG) is extracted from Cyampsis tetragonolobus seeds [32] and is formed by linear chains of β-(1-4)-D-mannan with side units of α-(1-6) linked galactose [24].Electrospinning of starch and GG have been studied separately in a few papers. Lubambo et al. [16] found that fibers obtained from GG solutions were not uniform and had insoluble aggregates between fibers and within their structure. These authors concluded that sequential filtration steps were needed after GG purification to reduce the aggregates and improve fiber morphology. Pure starch fibers in turn, could only be obtained from Dimethyl Sulfoxide (DMSO) solutions using electro-wetspinning technology due to the non-volatile nature of the organic solvent [12,13]. Starch derivatives have also been electrospun from formic acid solutions [15,34] while composite fibers have been produced from blends of starch with non-food grade polymers such as polyvinyl alcohol [29] and polylactic acid [30]. AbstractIn this study, electrospun nanofibers were prepared for the first time, from aqueous blends of guar gum (GG) and corn starch with amylose contents of 27.8% (CS28) and 50% (CS50). The fiber morphology and fiber diameter sizes (FDS) were correlated with solution rheology. The spinning solutions were prepared with 3 wt% total concentration and mass ratios ranging from 4:1 to 1:4 GG/CS. The GG alone (3 wt%) was highly viscous and predominantly elastic (G'>G'') over the range of tested frequencies. Both CS were effective rheological modifiers that facilitated the electrospinning process. Partial substitution of GG by CS decreased solution viscosity and moved the elastic plateau (...

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“…Kong and Ziegler 13 studied the preparation of pure corn starch bers by electro-wet-spinning. The result showed that starch bers had diameters in the order of microns and crystallinity of the bers was increased aer spinning.…”

Section: 8mentioning

confidence: 99%

Rice flour-based nanostructures via a water-based system: transformation from powder to electrospun nanofibers under hydrogen-bonding induced viscosity, crystallinity and improved mechanical property

et al. 2017

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Rice flour-based nanostructures via a water-based system: transformation from powder to electrospun nanofibers under hydrogen-bonding induced viscosity, crystallinity and improved mechanical property † Sarekha Woranuch, Autchara Pangon, Kantapat Puagsuntia, Nakarin Subjalearndee and Varol Intasanta * Rice flour is a naturally abundant and renewable biodegradable and biocompatible material. Nevertheless, fabrication of rice flour-based functional nanostructures has been challenging due to the difficulties in finetuning solution parameters. The present work shows a successful synthesis of rice-flour based nanofibers containing PVA by simply allowing rice flour and PVA to solubilize in alkaline conditions prior to electrospinning. Rice flour/PVA blend nanofibers at the rice flour weight content of 25% led to an optimal condition with reinforced hydrogen bonding between the two polymers. The interaction induced good processability and fiber formation with well-defined morphology. In addition, rice flour functioning as a nucleating agent promoted the crystallization of small PVA crystals resulting in an improvement of tensile strength and Young's modulus with respect to PVA nanofibers. This is for the first time showing not only the transformation of rice flour via a water-based system into mechanically robust nanofibers, but also the role of rice flour in inducing crystalline phase in semi-crystalline polymers in blends. The finding is important to bring in unprecedented practical applications for rice flour such as disposable nanofilters, tissue engineering scaffolds, wound dressings, etc. IntroductionRice starch is a biopolymer obtained from rice our via an alkaline steeping method.1 Starch represents a unique class of polysaccharides due to its rich variety of amylose-amylopectin combinations. While amylose is a linear chain and amorphous part of starch granule, amylopectin constitutes a branched and crystalline component. The interplay between these two key components in a vast degree of amylose fraction lead to various types of rice showing different physical structure and mechanical performance.2,3 Starches have been of high demand due to their non-toxicity, biodegradability, biocompatibility, and ability to form lms, membranes, gels, and bers. 4-6Recently, nanobers have received much attention due to their applications in many areas such as high-performance lter media, sensors, medicine and medical textile materials. 7,8Various methods have been developed to fabricate nanomaterials, e.g. drawing, phase separation, self-assembly, template synthesis and electrospinning.9-12 Compared with other techniques, electrospinning could be applicable for a wide range of polymers, capable of controlling ber morphology with potential for scaling up production.Only a few works have investigated starch-based bers prepared through electrospinning technology. Kong and Ziegler 13 studied the preparation of pure corn starch bers by electro-wet-spinning. The result showed that starch bers had diameters in the order of mi...

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Quantitative relationship between electrospinning parameters and starch fiber diameter

Cited by 111 publications

References 8 publications

Functional Nanofibers with Multiscale Structure by Electrospinning

Functional Nanofibers with Multiscale Structure by Electrospinning

Investigation on Photoluminescence Behaviour of 2, 3-Diphenylquinoxalin-6-Vinyl Benzaldehyde

Rice flour-based nanostructures via a water-based system: transformation from powder to electrospun nanofibers under hydrogen-bonding induced viscosity, crystallinity and improved mechanical property

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