Dissolving of Ultra-high Molecular Weight Polyethylene Assisted Through Supercritical Carbon Dioxide to Enhance the Mechanical Properties of Fibers

Wang, Yi; Fu, Jiabin; Yu, Junrong; Song, Qingquan; Zhu, Jing; Wang, Yan; Hu, Zuming

doi:10.1007/s42765-021-00107-6

Cited by 16 publications

(11 citation statements)

References 38 publications

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“…In our previous work, 25 we introduced the supercritical carbon dioxide (SC‐CO 2 ) to swell UHMWPE with the concentration of 8% in paraffin oil and obtained swollen UHMWPE with high swelling ratio under optimal conditions. The tensile properties of obtained fibers by gel‐spinning and hot‐drawing were enhanced.…”

Section: Introductionmentioning

confidence: 99%

Enhanced tensile properties of ultra‐high molecular weight polyethylene fibers by solubility improvement with mixed solvents

Wang

et al. 2023

J of Applied Polymer Sci

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The tensile properties of ultra‐high molecular weight polyethylene (UHMWPE) fibers obtained from mixed solvents are addressed by virtue of improved solubility. In this work, olive oil (OO) was introduced as a poor solvent for the pre‐swelling of UHMWPE in decalin, and its mass percentage was intended to be 10, 20, 30, and 40 wt% of UHMWPE. Then UHMWPE fibers with high molecular weight retention and low entanglement were prepared with paraffin oil as spinning solvent by gel‐spinning and hot‐drawing. Unlike other samples, there is a more significant molecular chain disentanglement and higher molecular weight retention for UHMWPE fibers as OO addition is 20 wt%. Surprisingly, obtained UHMWPE fibers exhibit tensile strength up to 33.85 cN/dtex and tensile modulus of 1673.27 cN/dtex, with an increase of 24.0% and 32.3%, respectively, compared with that of UHMWPE fibers without decalin/OO pre‐swelling. Furthermore, the obtained UHMWPE fibers are accompanied by a marked improvement in melting temperature, crystallization and orientation.

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Section: Introductionmentioning

confidence: 99%

Enhanced tensile properties of ultra‐high molecular weight polyethylene fibers by solubility improvement with mixed solvents

Wang

et al. 2023

J of Applied Polymer Sci

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“…To address these issues, the conversion of CO2 using different processes-such as photochemical, biochemical, thermochemical, electrochemical reduction, and photoelectrochemical reactions-has been proposed [8][9][10][11][12][13][14]. To convert CO2 into carbonaceous fuels, various methods have been adopted such as chemical absorption, chemical transformation via mineralization, biological transformation using photobioreactors, dry reforming, hydrogenation, photosynthesis, and electrosynthesis [15,18]. Among the aforementioned processes, thermochemical reduction of CO2 requires high temperatures, high pressures, high energy inputs, or an active reagent-such as hydrogen (H2)-as a reducing agent to overcome for the CO2 reduction, which are unsuitable for large-scale industrial applications [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Copper as a single metal atom based photo-, electro- and photoelectrochemical catalyst decorated on carbon nitride surface for efficient CO ₂ reduction: A review

Qiao¹,

Niazi²,

Zhang³

et al. 2022

Nano Research Energy

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The processes of photocatalytic CO 2 reduction (pCO 2 R) and electrochemical CO 2 reduction (ECO 2 R) have attracted considerable interest owing to their high potential to address many environmental and energy-related issues. In this aspect, a single Cu atom decorated on a carbon nitride (CN) surface (Cu-CN) has gained increasing popularity because of its unique advantages, such as excellent atom utilization and ultrahigh catalytic activity. CN-particularly graphitic CN (g-C 3 N 4 )-is a photo-and electrocatalyst and used as an important support material for single Cu atom-based catalysts. These key functions of Cu-CN-based catalysts can improve the catalytic performance and stability in the pCO 2 R and ECO 2 R during the application process. In this review, we focus on Cu as a single metal atom decorated on CN for efficient photoelectrochemical CO 2 reduction (pECO 2 R), where ECO 2 R increases the electrocatalytic active area and promotes electron transfer, while pCO 2 R enhances the surface redox reaction by efficiently using photogenerated charges and offering integral activity as well as an active interface between Cu and CN. Interactions of single Cu atom-based photo-, electro-, and photoelectrochemical catalysts with g-C 3 N 4 are discussed. Moreover, for a deeper understanding of the history of the development of pCO 2 R and ECO 2 R, the basics of CO 2 reduction, including pCO 2 R and ECO 2 R over g-C 3 N 4 , as well as the structural composition, characterization, unique design, and mechanism of a single atom site are reviewed in detail. Finally, some future prospects and key challenges are discussed.

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“…Paraffin oil was used as a solvent to help disperse nanotubes, dissolve UHMWPE and nylon, and facilitate melt extrusion. In this investigation paraffin oil was not treated with any other chemical compound like CO 2 or Decalin as carried out by other researchers 24–26 . The ratio of paraffin oil to solid (i.e., UHMWPE + nylon + SWCNT's) was optimized by several iterations of spinning and testing the fiber.…”

Section: Methodsmentioning

confidence: 99%

Structural modification of UHMWPE fiber through hybridization and CNT reinforcement for ballistic applications

Mahfuz

Carlsson

Masory

et al. 2023

J of Applied Polymer Sci

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In the construction of an armor for ballistic protection, fibers are used in the form of a laminated composite bonded to the back of the frontal ceramic layer.The composite layer dissipates energy transmitted through the ceramic layer and controls the spall. To absorb energy locally and to spread it out fast, fibers in the composite layer must have high toughness and tensile wave speed as quantified by a primary performance index called normalizing velocity. The goal of this investigation is to increase the normalizing velocity of ultra-high molecular weight (UHMWPE) fiber that is widely used in ballistic protection. The structure of UHMWPE is modified by hybridizing with nylon and reinforcing with carbon nanotubes. Fibers are extruded by melt-spinning. The concentration of nylon and nanotubes is 18 and 2 wt%, respectively. After extrusion, fibers are strain-hardened by cyclic loading to align UHMWPE molecules and nanotubes along the fiber axis. Tensile properties are determined to calculate normalizing velocity. Normalizing velocities up to 1270 m/s were obtained for the modified fiber which outperforms Spectra-2000 and Dyneema-SK75 by 44%-57%. Materials chemistry and structure of the fiber are investigated through differential scanning calorimetry (DSC), Raman Spectroscopy, and scanning electron microscope (SEM). It was observed that microdroplet formation by the nylon phase during hybridization promotes interface sliding of UHMWPE ligaments and elevates the fracture strain. Raman and SEM examination demonstrates that embedded nanotubes get aligned along the fiber axis due to strain hardening and co-continuously deform with UHMWPE sharing the load.

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Dissolving of Ultra-high Molecular Weight Polyethylene Assisted Through Supercritical Carbon Dioxide to Enhance the Mechanical Properties of Fibers

Cited by 16 publications

References 38 publications

Enhanced tensile properties of ultra‐high molecular weight polyethylene fibers by solubility improvement with mixed solvents

Enhanced tensile properties of ultra‐high molecular weight polyethylene fibers by solubility improvement with mixed solvents

Copper as a single metal atom based photo-, electro- and photoelectrochemical catalyst decorated on carbon nitride surface for efficient CO ₂ reduction: A review

Structural modification of UHMWPE fiber through hybridization and CNT reinforcement for ballistic applications

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Dissolving of Ultra-high Molecular Weight Polyethylene Assisted Through Supercritical Carbon Dioxide to Enhance the Mechanical Properties of Fibers

Cited by 16 publications

References 38 publications

Enhanced tensile properties of ultra‐high molecular weight polyethylene fibers by solubility improvement with mixed solvents

Enhanced tensile properties of ultra‐high molecular weight polyethylene fibers by solubility improvement with mixed solvents

Copper as a single metal atom based photo-, electro- and photoelectrochemical catalyst decorated on carbon nitride surface for efficient CO 2 reduction: A review

Structural modification of UHMWPE fiber through hybridization and CNT reinforcement for ballistic applications

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Copper as a single metal atom based photo-, electro- and photoelectrochemical catalyst decorated on carbon nitride surface for efficient CO ₂ reduction: A review