A facile method to prepare CdS/polymer nanocomposite fibers for the photodegradation of methylene blue under sunlight

Abstract Nanosized CdS/polymer composite fiber mats were fabricated via a facile electrospinning processing, and the as-prepared composite fiber mats showed excellent photodegradation ability to methylene blue (MB). Polymers bearing N and S atoms with affinity to Cd2+ ions were first synthesized and then used to prepare CdS/polymer composite fibers. In this work, coaxial electrospinning was employed to achieve the preparation of the desired composite fibers using special polymers as core and cadmium acetate [Cd(CH3COO)2] as shell. Then, fiber mats were immersed in thioacetamide (TAA) solution for several minutes, and CdS/polymer composite mats were obtained eventually. The photodegradation catalytic ability was tested using MB as a model dye under sunlight. The photocatalytic efficiency of the CdS/polymer composite fiber mat was recorded and studied by UV-visible spectra, and it showed high efficiency. Nanofiber mats will find real applications in the treatment of wastewater.

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Ultrahigh energy fiber-shaped supercapacitors based on porous hollow conductive polymer composite fiber electrodes

Journal of Materials Chemistry A ◽

10.1039/c8ta03903h ◽

2018 ◽

Vol 6 (26) ◽

pp. 12250-12258 ◽

Cited By ~ 13

Author(s):

Yangfan Zhang ◽

Xiyue Zhang ◽

Kang Yang ◽

Xuliang Fan ◽

Yexiang Tong ◽

...

Keyword(s):

Energy Density ◽

Polymer Composite ◽

Conductive Polymer ◽

Composite Fiber ◽

Ultrahigh Energy ◽

Composite Fibers ◽

Conductive Composite ◽

Conductive Polymer Composite

Porous, hollow, and conductive composite fibers are developed for fiber-shaped supercapacitors with unprecedented cycling durability and an ultrahigh energy density of 1.55 mW h cm−3.

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Preparation and Characterization of Spidroin and PLLA Blended Nanofiber Mats

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.175-176.127 ◽

2011 ◽

Vol 175-176 ◽

pp. 127-131 ◽

Cited By ~ 1

Author(s):

Min Zhang ◽

Ye Mei Zhang ◽

Wei Wu ◽

Ai Li Zhang ◽

Zhi Juan Pan

Keyword(s):

Spider Silk ◽

Molecular Conformation ◽

Random Coil ◽

Composite Fibers ◽

Fiber Mats ◽

Initial Modulus ◽

Plla Fiber ◽

Α Helix ◽

Nanofiber Mats

Due to the exceptional biocompatibility of spider silk and poly-L-lactic acid (PLLA), electrospun PLLA or spidroin fiber mat is one of the best biomaterials. The diameter of electropun PLLA fiber decreased and mechanical property of such fiber mats was improved once some spidroin was added into PLLA/Hexaflorisopropanol (HFIP) solution. The influence of electrospinning voltage and distance on the shape and mechanical properties of spidroin/PLLA composite fibers was investigated as well as the molecular conformation and crystalline structure of the electrospun fibers. The results revealed that the diameter of spidroin/PLLA fiber was non-uniform, which varied from 300nm to 1000nm. The content of random coil or α-helix structure was about 45%, and spidroin presented a crystal structure separated with PLLA in their composite fibers. With the raise of voltage, the proportion of nano-sized fibers in an electrospun spidroin/PLLA fiber mat increased and tended to be unchanged. The breaking strength of the mat was improved following the increase of voltage. Meanwhile, the ratio of nano-sized fibers and initial modulus of the spidroin/PLLA fiber mat underwent the convex change against the electrospinning distance between the needle and collector.

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Development of fast and high-efficiency sponge-gourd fibers (Luffa cylindrica)/hydroxyapatite composites for removal of lead and methylene blue

Arabian Journal of Chemistry ◽

10.1016/j.arabjc.2021.103281 ◽

2021 ◽

pp. 103281

Author(s):

Ahmed A. Oun ◽

Kholod H. Kamal ◽

Khaled Farroh ◽

Esmat F. Ali ◽

Mohamed A. Hassan

Keyword(s):

Methylene Blue ◽

High Efficiency ◽

Luffa Cylindrica ◽

Sponge Gourd

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Preparation and Characrization of Tic/C Composite Fiber by Chemical Vapor Deposition

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.455-456.935 ◽

2012 ◽

Vol 455-456 ◽

pp. 935-938

Author(s):

Hai Quan Wang

Keyword(s):

Chemical Vapor Deposition ◽

Carbon Fibers ◽

Vapor Deposition ◽

Chemical Vapor ◽

Composite Fiber ◽

Composite Fibers ◽

X Ray Diffraction ◽

Reaction Conditions ◽

Tic Particle ◽

Higher Temperature

- TiC/C composite fibers were prepared by vapor phase titanizing of the regular carbon fibers via chemical vapor deposition (CVD). The carbon fibers were titanized from the surface of the fiber to the core. Scanning electron microscope (SEM) and X-ray diffraction (XRD) were applied to characterize the morphology and structure of the TiC/C composite fibers. The influences of CVD reaction conditions such as temperature and reaction time on the TiC particle size and the thickness of the deposited layer were investigated. Higher temperature and longer time resulted in the growth of bigger size of the TiC crystal particles, and the particle uniformity was also decreased.

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Starch-Based Fishing Composite Fiber and Its Degradation Behavior

International Journal of Polymer Science ◽

10.1155/2020/9209108 ◽

2020 ◽

Vol 2020 ◽

pp. 1-10

Author(s):

Wenwen Yu ◽

Fei Yang ◽

Lei Wang ◽

Yongli Liu ◽

Jiangao Shi

Keyword(s):

Melt Spinning ◽

Starch Content ◽

Reactive Extrusion ◽

Composite Fiber ◽

Mechanical Analysis ◽

Composite Fibers ◽

Reactive Blending ◽

Dynamic Mechanical ◽

One Step ◽

Β Relaxation

The starch-based fishing composite fibers were prepared by one-step reactive extrusion and melt spinning. The effects of starch contents on the microstructural, thermal, dynamic mechanical, and mechanical properties of starch-based composite fibers were studied. And the degradation behaviors in soil of the fibers were also investigated. The compatibility between starch and HDPE is improved significantly by grafting maleic anhydride (MA) using one-step reactive blending extrusion. As the starch content increased, the melting temperature and the crystallinity of the fibers gradually decreased due to fluffy internal structures. Dynamic mechanical analysis showed that the transition peak α in the high-temperature region was gradually weakened and narrowed with increasing starch content; moreover, a shoulder appeared on the low-temperature side of the α peak was assigned to the β-relaxation related to starch phase. In addition, the mechanical results showed the significant decrease in the breaking strength and increase in the elongation at break of the starch-based composite fibers as the starch content increased. After degradation in soil for 5 months, the surface of the composite fibers had been deteriorated, while flocculent layers were observed and a large number of microfibers appeared. And the weight loss rate of the starch-based composite fibers (5.2~34.8%) significantly increased with increasing starch content (50~90 wt%).

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Fabrication and Characterization of Lignin/Dendrimer Electrospun Blended Fiber Mats

Molecules ◽

10.3390/molecules26030518 ◽

2021 ◽

Vol 26 (3) ◽

pp. 518

Author(s):

Somaye Akbari ◽

Addie Bahi ◽

Ali Farahani ◽

Abbas S. Milani ◽

Frank Ko

Keyword(s):

Thermal Characteristics ◽

Dendritic Polymers ◽

Amino Groups ◽

Fiber Mats ◽

Potential Applications ◽

Solution Electrospinning ◽

Nanofiber Mats ◽

Softwood Kraft Lignin ◽

First Time

Blending lignin as the second most abundant polymer in Nature with nanostructured compounds such as dendritic polymers can not only add value to lignin, but also increase its application in various fields. In this study, softwood Kraft lignin/polyamidoamine dendritic polymer (PAMAM) blends were fabricated by the solution electrospinning to produce bead-free nanofiber mats for the first time. The mats were characterized through scanning electron microscopy, Fourier transform infrared (FTIR) spectroscopy, zeta potential, and thermogravimetry analyses. The chemical intermolecular interactions between the lignin functional groups and abundant amino groups in the PAMAM were verified by FTIR and viscosity measurements. These interactions proved to enhance the mechanical and thermal characteristics of the lignin/PAMAM mats, suggesting their potential applications e.g. in membranes, filtration, controlled release drug delivery, among others.

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Alignment of carbon nanotubes and reinforcing effects in nylon-6 polymer composite fibers

Nanotechnology ◽

10.1088/0957-4484/19/24/245703 ◽

2008 ◽

Vol 19 (24) ◽

pp. 245703 ◽

Cited By ~ 45

Author(s):

Vijaya K Rangari ◽

Mohammed Yousuf ◽

Shaik Jeelani ◽

Merlyn X Pulikkathara ◽

Valery N Khabashesku

Keyword(s):

Carbon Nanotubes ◽

Polymer Composite ◽

Nylon 6 ◽

Composite Fibers ◽

Reinforcing Effects

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Proof-Of-Concept of a Thermal Barrier Coated Titanium Cooling Layer for an Inside-Out Ceramic Turbine

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.4052021 ◽

2021 ◽

Author(s):

Antoine Gauvin-Verville ◽

Patrick K. Dubois ◽

Benoit Picard ◽

Alexandre Landry-Blais ◽

Jean-Sébastien Plante ◽

...

Keyword(s):

Polymer Composite ◽

Safety Factor ◽

Gas Turbines ◽

High Efficiency ◽

Cooling Power ◽

Thermal Barrier ◽

Inlet Temperature ◽

Turbine Stage ◽

Minimum Safety Factor ◽

Inside Out

Abstract Increasing turbine inlet temperature (TIT) of recuperated gas turbines would lead to simultaneously high efficiency and power density, making them prime candidates for low-emission aeronautics applications, such as hybrid-electric aircraft. The Inside-out Ceramic Turbine (ICT) architecture achieves high TIT by using compression-loaded monolithic ceramics. To resist inertial forces due to blade tip speed exceeding 450 m/s, the shroud of the ICT is made of carbon-polymer composite, wound around a metallic cooling ring. This paper demonstrates that it is beneficial to use a titanium alloy cooling ring with a thermal barrier coating (TBC), rather than nickel superalloys, for the interstitial cooling ring protecting the carbon-polymer from the hot combustion gases. A numerical Design of Experiments (DOE) analysis shows the design trade-offs between the minimum safety factor and the required cooling power for multiple geometries. An optimized high-pressure first turbine stage of a 500 kW microturbine concept using ceramic blades and a titanium cooling ring in an ICT configuration is presented. Its structural performance (minimum safety factor of 1.4) as well as its cooling losses (2% of turbine stage power) are evaluated. Finally, a 20 kW-scale prototype is tested at 300 m/s and a TIT of 1375 K during 4hrs to demonstrate the viability of the concept. Experiments show that the polymer composite was kept below its maximum safe operating temperature and components show no early signs of degradation.

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