Polylactic acid/multi-wall carbon nanotubes composite fibrous membrane and their applications in oil-water separation

Mo, Jinpeng; Wang, Ying; Lin, Jiahui; Ke, Yuemei; Zhou, Chunhui; Wang, Jingrong; Wen, Junxian; Gan, Feng; Wang, Lihuan; Ma, Chunping

doi:10.1016/j.surfin.2023.102908

Cited by 14 publications

(6 citation statements)

References 38 publications

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“…Furthermore, the observed decrease in surface hydrophilicity with increasing CNT content is consistent with the hydrophobic nature of MWCNTs. It has important implications for the properties and applications of the material 27 . Further investigation is needed to fully understand the effects of CNT loading on the composite material's surface properties and optimize its performance for various applications.…”

Section: Resultsmentioning

confidence: 99%

Pushing the limits of PLA by exploring the power of MWCNTs in enhancing thermal, mechanical properties, and weathering resistance

Younus,

Naguib,

Fekry

et al. 2023

Sci Rep

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The present study focuses on enhancing the mechanical, thermal, and degradation behavior of polylactic acid (PLA) by adding carbon nanotubes (CNTs) with different concentrations of 0.5, 1, 3, and 5%. The CNTs were prepared using catalytic chemical vapor deposition, and the prepared PLA/CNTs nanocomposite films were characterized using techniques such as FT-IR, Raman spectroscopy, TGA, SEM, and XRD. The distinct diffraction patterns of multi-walled carbon nanotubes (MWCNTs) at 2θ angles of 25.7° and 42.7° were no longer observed in the prepared nanocomposites, indicating uniform dispersion of MWCNTs within the PLA matrix. The presence of MWCNTs enhanced the crystallinity of PLA as the CNT loading increased. Mechanical tests demonstrated that incorporating CNTs positively influenced the elongation at the break while decreasing the ultimate tensile strength of PLA. The PLA-3%CNTs composition exhibited the highest elongation at break (51.8%) but the lowest tensile strength (64 MPa). Moreover, thermal gravimetric analysis confirmed that the prepared nanocomposites exhibited greater thermal stability than pure PLA. Among the nanocomposites, PLA-5% CNTs exhibited the highest thermal stability. Furthermore, the nanocomposites demonstrated reduced surface degradation in accelerated weathering tests, with a more pronounced resilience to UV radiation and moisture-induced deterioration observed in PLA-3% CNTs.

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Section: Resultsmentioning

confidence: 99%

Pushing the limits of PLA by exploring the power of MWCNTs in enhancing thermal, mechanical properties, and weathering resistance

Younus,

Naguib,

Fekry

et al. 2023

Sci Rep

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show abstract

“…With the development of industrial processes such as petrochemicals, iron and steel, coking, and mechanical processing, the generation of oily wastewater has also increased substantially, and it has a long-term harmful effect on the ecological environment. Therefore, the separation of oil-water mixtures has received increasing attention [76][77][78][79][80]. The selection of membrane materials with certain surface wettability is the key to the application of membrane separation technology in oil-water separation.…”

Section: Ectfe Membrane For Oil-water Emulsion Separationmentioning

confidence: 99%

Preparation, Modification, and Application of Ethylene-Chlorotrifluoroethylene Copolymer Membranes

Liao,

Wang,

Zhou

et al. 2024

Membranes

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Ethylene-chlorotrifluoroethylene (ECTFE) was first commercialized by DuPont in 1974. Its unique chemical structure gives it high heat resistance, mechanical strength, and corrosion resistance. But also due to these properties, it is difficult to prepare a membrane from it by the nonsolvent-induced phase separation (NIPS) method. However, it can be prepared as a microfiltration membrane using the thermally induced phase separation (TIPS) method at certain temperatures and with the selection of suitable solvents, and the use of green solvents is receiving increasing attention from researchers. The surface wettability of ECTFE membranes usually needs to be modified before use to strengthen its performance to meet the application requirements, usually by graft modification and surface oxidation techniques. This paper provides an overview of the structure of ECTFE and its preparation and modification methods, as well as recent advances in its application areas and prospects for the future methods of preparing high-performance ECTFE membranes.

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“…For example, Mo et al prepared a series of hydrophobic PLA/multiwalled carbon nanotube composite fibrous membranes by electrostatic spinning with high oil absorption capacity. 20 Krasian et al showed good oil−water separation properties by introducing MoS 2 and WS 2 to the formation of PLA fibrous mats. 21 However, upon the introduction of these nanofillers to the fiber membrane, due to their weak bonding energy, they are usually easy to separate from PLA during the separation process and thus enter into the oil and water to cause secondary contamination and impact the stability of the hybrid fiber membrane.…”

Section: Introductionmentioning

confidence: 99%

“…Biobased biodegradable materials, predominantly poly(lactic acid) (PLA), synthesized from biomass raw materials, contribute to reducing dependency on fossil resources and exhibit excellent processability, rendering them an exemplary choice for developing better separation materials. , The main strategy for modifying PLA membranes has been adding inorganic nanofillers to impart hydrophilic and hydrophobic properties. For example, Mo et al prepared a series of hydrophobic PLA/multiwalled carbon nanotube composite fibrous membranes by electrostatic spinning with high oil absorption capacity . Krasian et al showed good oil–water separation properties by introducing MoS 2 and WS 2 to the formation of PLA fibrous mats .…”

Section: Introductionmentioning

confidence: 99%

Polymer PU–PTHF–PU Significantly Enhances the Mechanical Properties of Poly(lactic acid) Matrix Oil–Water Separation Fiber Membranes

Chen,

Zhang,

Song

et al. 2024

ACS Appl. Polym. Mater.

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As the global economy continues to expand, the issue of oily wastewater pollution has garnered significant attention. Consequently, this paper reports a poly(lactic acid)-based coblended fiber membrane for oil− water separation. The synthesis of a polyurethane−poly(tetrahydrofuran)− polyurethane (PU−PTHF−PU) polymer at 25 °C and its incorporation at 20 wt % into fibrous membranes resulted in a water contact angle of 138°. The coblended fibrous membranes exhibited a tensile strength of 8.05 MPa and an elongation at break of 46.53%, simultaneously improving the rigidity and toughness of the fiber membrane, endowing the poly(L-lactic acid) (PLLA) fibrous membranes with good hydrophobicity and mechanical properties. Featuring a maximum permeate flux of 3898 L•m −2 •h −1 , an oil recovery efficiency of 99.4%, and outstanding stability and durability, the PU−PTHF− PU/PCL/PLLA [PCL = poly(ε-caprolactone)] fibrous membrane represents an ideal solution as an all-biobased biodegradable membrane for oil−water separation.

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Polylactic acid/multi-wall carbon nanotubes composite fibrous membrane and their applications in oil-water separation

Cited by 14 publications

References 38 publications

Pushing the limits of PLA by exploring the power of MWCNTs in enhancing thermal, mechanical properties, and weathering resistance

Pushing the limits of PLA by exploring the power of MWCNTs in enhancing thermal, mechanical properties, and weathering resistance

Preparation, Modification, and Application of Ethylene-Chlorotrifluoroethylene Copolymer Membranes

Polymer PU–PTHF–PU Significantly Enhances the Mechanical Properties of Poly(lactic acid) Matrix Oil–Water Separation Fiber Membranes

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