Evaluation of Mechanical Properties of Magnetite/PLA Nanofibers

Tanaka, Kazuto; Okada, Takuya; Katayama, Tsutao

doi:10.2472/jsms.67.917

Cited by 3 publications

(3 citation statements)

References 20 publications

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“…14 shows the stress-displacement curves of the nonwoven fabric. After the linear deformation with high gradient, the gradient changed to the low level, which is close to the reported stress-displacement curve of nonwoven fabric of nanofibers [13]. Fig.…”

Section: Resultssupporting

confidence: 86%

Evaluation of Mechanical Properties of Dimpled PET Fiber Fabricated by Electrospinning Method

Tanaka

Kawasaki

Katayama

et al. 2018

MSF

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Insufficient endothelialization of stent grafts tends to cause a problem of thrombosis formation. Because the structure of nanofibers, generally defined as fibers with a diameter below 1 μm, resembles the structure of an extracellular matrix, nanofibers are applied to scaffolds for regenerative medicine. Using nanofibers as the covering material of the stent graft can be expected to solve the problem of the stent graft. Previous studies have shown that a porous scaffold offers better surfaces to anchor and culture endothelial cells than a nonporous scaffold. Therefore, fibers with nanoorder dimples are expected to promote endothelialization. As a method of forming the dimple shape on the surface of the PET fiber, there is a method utilizing a difference in the volatilization rate of the solvent in the high humidity environment in the electrospinning method. For practical application of the stent graft to artificial blood vessels, the mechanical properties of the dimpled PET fiber should be clarified. In this study, the mechanical properties of single nanofibers and nonwoven fabrics of PET fibers with dimples on their surface were evaluated by tensile test. By forming the dimple shape on the fiber surface, the tensile strength of single PET fibers with dimples was 90 % lower than that of single PET fibers with a smooth surface. In the fabrication process of nonwoven fabric, the addition of EG delayed the volatilization of the PET solution, and the fibers adhered to each other. The bonding between the fibers contributed to the tensile strength of the nonwoven fabric.

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Section: Resultssupporting

confidence: 86%

Evaluation of Mechanical Properties of Dimpled PET Fiber Fabricated by Electrospinning Method

Tanaka

Kawasaki

Katayama

et al. 2018

MSF

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“…From the point of view of shape, the clothing pattern mostly adopts the method of traditional Chinese line drawing or approximate line drawing, using the line as the line to capture the basic characteristics of the characters, exaggerating and deforming on the basis of realism, and using different points and different lengths at the same time. e lines and different shapes make them varied and harmoniously combined in different patterns [15]. In the arrangement of colors, pay attention to strong, dense, and strong contrast, usually using fine and uniform small contrast, so that the color can be harmonious in the change.…”

Section: Design Methods Of Ethnic Costume Patternsmentioning

confidence: 99%

Pattern Design of Ethnic Clothing Based on Stretchable Nanofiber Fabrics

Wen

Shao

2022

Advances in Materials Science and Engineering

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With the rapid development of social economy, people’s material and spiritual living standards have been greatly improved, and the demand for clothing has also increased. Chinese clothing has distinct national characteristics, and it contains rich national culture. Through a lot of research, it will be found that most of the national costume patterns represent some symbols with specific meanings. From the symbols, we can see the status, hobbies, and beliefs of the costume owners. At present, the popularity of traditional ethnic clothing is low, for which stretchable nanofiber fabrics are introduced in this paper. Through the influence of image rotation, scale change, noise interference, and other factors, a method for extracting features of ethnic clothing patterns based on image rotation, scale change, and noise interference is proposed. It uses digital inkjet printing to design patterns on nanofiber fabrics, compares the satisfaction degree of the nanofiber fabric national costumes designed in this paper and traditional national costumes, and divides the satisfaction into four levels: satisfied, relatively satisfied, general, and dissatisfied. The experimental results showed that the satisfaction rate of the ethnic costumes designed in this paper has reached 79.12%, which has been greatly improved compared with the traditional ethnic costumes.

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“…Since magnetic nanoparticles tend to aggregate due to their interaction, and the location of aggregation becomes the starting point of fracture, particle dispersion in nanofibers becomes an important issue [1]. Our previous study revealed that the surface treatment of magnetite with oleic acid can be used to improve the dispersibility and aggregates can be suppressed [2]. When the amount of magnetite is large, the effect of oleic acid is remarkable, but the problem is that sufficient dispersion cannot be realized under the condition of small amount of magnetite.…”

Section: Introductionmentioning

confidence: 99%

Influence of Magnetite Dispersion on Tensile Properties

Tanaka

Ishii

Katayama

2019

KEM

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Nanofibers have high cell affinity due to their fine structure and surface roughness, and are expected to be used as biomaterials. In particular, magnetic nanofibers containing magnetic particles are expected to be used for magnetically induced drug delivery systems and hyperthermia. However, due to the aggregation of the magnetic particles contained in the nanofibers, there is a problem that the aggregation location becomes a starting point of fracture and causes a decrease in tensile strength. In this study, to improve the dispersibility of magnetic particles in Magnetite/PLA nanofiber nonwoven fabrics for suppressing the decrease in tensile strength, magnetite is subjected to surface treatment with oleic acid or stearic acid and ultrasonic agitation. Magnetite/PLA nanofiber nonwoven fabric was prepared by the electrospinning method, and dispersion of magnetite in PLA nanofiber nonwoven fabric and tensile strength were evaluated. Magnetite dispersion was improved by the surface treatment and increasing the ultrasonic agitation time. In particular, by performing the stearic acid treatment and prolonging the ultrasonic agitation time, the magnetite dispersion tended to be improved. This treated Magnetite/PLA nanofiber nonwoven fabric showed higher tensile strength.

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Evaluation of Mechanical Properties of Magnetite/PLA Nanofibers

Cited by 3 publications

References 20 publications

Evaluation of Mechanical Properties of Dimpled PET Fiber Fabricated by Electrospinning Method

Evaluation of Mechanical Properties of Dimpled PET Fiber Fabricated by Electrospinning Method

Pattern Design of Ethnic Clothing Based on Stretchable Nanofiber Fabrics

Influence of Magnetite Dispersion on Tensile Properties

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