Wet-spinning assembly of continuous and macroscopic graphene oxide/polyacrylonitrile reinforced composite fibers with enhanced mechanical properties and thermal stability

2018 ◽  
Vol 136 (3) ◽  
pp. 46950 ◽  
Author(s):  
Renhai Zhao ◽  
Mingwei Tian ◽  
Lijun Qu ◽  
Yuling Zhao ◽  
Shaojuan Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Graphene Oxide ◽  
Wet Spinning ◽  
Composite Fibers ◽  
Reinforced Composite

scholarly journals Regulation Mechanism of Graphene Oxide on the Structure and Mechanical Properties of Bio-Based Gel-Spun Lignin/Poly (Vinyl Alcohol) Fibers

2021 ◽  
Author(s):  
Yanhong Jin ◽  
Yuanyuan Jing ◽  
Wenxin Hu ◽  
Jiaxian Lin ◽  
Yu Cheng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Graphene Oxide ◽  
Young’S Modulus ◽  
Vinyl Alcohol ◽  
Young's Modulus ◽  
Lignin Content ◽  
Poly Vinyl Alcohol ◽  
Regulation Mechanism ◽  
Composite Fibers

Abstract Lignin has been used as a sustainable and eco-friendly filler in composite fibers. However, lignin aggregation occurred at high lignin content, which significantly hindered the further enhancement of fiber performance. The incorporation of graphene oxide (GO) enhanced the mechanical properties of the lignin/poly(vinyl alcohol) (PVA) fibers and affected their structure. With the GO content increasing from 0 to 0.2%, the tensile strength of 5% lignin/PVA fibers increased from 491 MPa to 631 MPa, and Young's modulus increased from 5.91 GPa to 6.61 GPa. GO reinforced 30% lignin/PVA fibers also showed the same trend. The tensile strength increased from 455 MPa to 553 MPa, and Young's modulus increased from 5.39 GPa to 7 GPa. The best mechanical performance was observed in PVA fibers containing 5% lignin and 0.2% GO, which had an average tensile strength of 631 MPa and a Young’s modulus of 6.61 GPa. The toughness values of these fibers are between 9.9-15.6 J/g, and the fibrillar and ductile fracture microstructure were observed. Structure analysis of fibers showed that GO reinforced 5% lignin/PVA fibers had higher crystallinity, and evidence of hydrogen bonding among GO, lignin, and PVA in the gel fibers was revealed. Further, water resistance and swelling behavior of composite PVA fibers were studied to further evidence the structure change of composite fibers.

scholarly journals Hemocompatible Chitin-Chitosan Composite Fibers

Cosmetics ◽  
2020 ◽  
Vol 7 (2) ◽  
pp. 28 ◽  
Author(s):  
Ekaterina N. Maevskaia ◽  
Oksana P. Kirichuk ◽  
Sergei I. Kuznetzov ◽  
Elena N. Dresvyanina ◽  
Vladimir V. Yudin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Clinical Practice ◽  
Optical Density ◽  
Human Blood ◽  
Wet Spinning ◽  
Composite Fibers ◽  
Prolonged Contact ◽  
The Stability ◽  
Chitosan Composite

Composite chitosan fibers filled with chitin nanofibrils (CNF) were obtained by the wet spinning method. The paper discusses the mechanical properties of such type fibers and their hemocompatibility, as well as the possibility of optimizing these properties by adding chitin nanofibrils. It was shown that low CNF concentration (about 0.5%) leads to an increase in fiber tensile strength due to the additional orientation of chitosan macromolecules. At the same time, with an increase in the content of CNF, the stability of the mechanical properties of composite fibers in a humid medium increases. All chitosan fibers, except 0.5% CNF, showed good hemocompatibility, even on prolonged contact with human blood. The addition of chitin nanofibers leads to decrease in hemoglobin molecules sorption due to the decline in optical density at wavelengths of 414 nm and 540 nm. Nevertheless, the hemolysis of fibers was comparable or even lesser that carbon hemosorbent, which is actively used in clinical practice.

scholarly journals Effect of Compatibilizer on the Interface Bonding of Graphene Oxide/Polypropylene Composite Fibers

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1283 ◽  
Author(s):  
Miao Miao ◽  
Chunyan Wei ◽  
Ying Wang ◽  
Yongfang Qian
Keyword(s):  
Thermal Stability ◽  
Graphene Oxide ◽  
Loss Modulus ◽  
Composite Fiber ◽  
Mechanical Analysis ◽  
Interfacial Bonding ◽  
Composite Fibers ◽  
Scanning Calorimetry ◽  
Blending Method ◽  
Thermal Stability Of

To improve the interfacial bonding and thermal stability of graphene oxide (GO)/polypropylene (PP) composite fibers, a composite fiber with PP as the matrix, GO as reinforcement and maleic anhydride-grafted PP (PP-g-MAH) as a compatibilizer was prepared by a simple and efficient melt-blending method. The GO content was 0.0–5.0 wt %. According to the Fourier Transform Infrared (FT-IR) spectroscopy results, the interfacial bonding in the PP/MAH/GO composite fibers was improved. The Dynamic Mechanical Analysis (DMA) results show that the addition of GO resulted in better interfacial adhesion and higher storage modulus (E′). The loss modulus (E′′) of the PP/MAH/GO-x composite fibers increased with increasing amount of added GO, whereas the loss factor (tan δ) decreased. GO and PP-g-MAH were analyzed by Thermogravimetric Analysis (TGA). The thermal stability of the composite fibers was improved compared to PP. Differential Scanning Calorimetry (DSC) analysis showed that the addition of PP-g-MAH to the composite fiber improved the interfacial bonding of GO in the PP matrix. Thus, compatibility between the two components was obtained. Based on the Scanning Electron Microscopy (SEM) results, the PP fibers exhibited relative orientation due to the strong crystalline morphology. The rough section, PP/GO blend fiber exhibits a very clear phase separation morphology due to the incompatibility between the two and the compatibility of GO and PP in PP/MAH/GO-3 composite fiber is improved, resulting in the interface between the two has improved.

scholarly journals Antimicrobial Polymeric Materials; Cellulose and m-Aramid Composite Fibers

2007 ◽  
Vol 2 (4) ◽  
pp. 155892500700200 ◽  
Author(s):  
Jaewoong Lee ◽  
R. M. Broughton ◽  
S. D. Worley ◽  
T. S. Huang
Keyword(s):  
Mechanical Properties ◽  
Antimicrobial Activity ◽  
Polymeric Materials ◽  
Composite Fiber ◽  
Wet Spinning ◽  
Gram Negative Bacteria ◽  
Composite Fibers ◽  
Aramid Fibers ◽  
Gram Negative ◽  
Chlorine Bleach

Cellulose and m-aramid were dissolved in an ionic liquid, and dry-jet wet spinning was employed to prepare composite fibers which could be rendered antimicrobial through exposure to chlorine bleach. The small domains of the m-aramid allowed a much higher accessibility and degree of chlorination than has been reported even for 100% m-aramid fibers. The mechanical properties including denier, tenacity, and strain at break were evaluated. The chlorinated composite fiber inactivated both Gram-positive and Gram-negative bacteria. The antimicrobial activity was retained after repeated washing and recharging.

Functionalized reduced graphene oxide/epoxy composites with enhanced mechanical properties and thermal stability

2017 ◽  
Vol 63 ◽  
pp. 1-11 ◽  
Author(s):  
Suman Chhetri ◽  
Nitai Chandra Adak ◽  
Pranab Samanta ◽  
Naresh Chandra Murmu ◽  
Tapas Kuila
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Epoxy Composites ◽  
Reduced Graphene

Impact of the wet spinning parameters on the alpaca‐based polyacrylonitrile composite fibers: Morphology and enhanced mechanical properties study

2020 ◽  
Vol 137 (41) ◽  
pp. 49264 ◽  
Author(s):  
Md Abdullah Al Faruque ◽  
Rechana Remadevi ◽  
Joselito M. Razal ◽  
Maryam Naebe
Keyword(s):  
Mechanical Properties ◽  
Wet Spinning ◽  
Composite Fibers

Polyimide foams with outstanding flame resistance and mechanical properties by the incorporation of noncovalent bond modified graphene oxide

2020 ◽  
Vol 44 (28) ◽  
pp. 12068-12078 ◽  
Author(s):  
Hongtao Liu ◽  
Huafeng Tian ◽  
Yuanyuan Yao ◽  
Aiming Xiang ◽  
Haisong Qi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Graphene Oxide ◽  
Flame Resistance ◽  
Noncovalent Bond ◽  
Composite Foams ◽  
Modified Graphene Oxide ◽  
Modified Graphene

PI composite foams were in situ generated by incorporating modified GO to further improve flame resistance, thermal stability and mechanical properties.

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