Pore structure design of NFES PTFE membrane for membrane emulsification

Cheng, Jinxue; Huang, Qinglin; Huang, Yan; Yu, Shiwen; Xiao, Changfa; Hu, Quan

doi:10.1016/j.memsci.2020.118365

Cited by 34 publications

(10 citation statements)

References 25 publications

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“…With the addition of 5 wt.% h-BN in the POB/PTFE or PI/PTFE composite, it is clearly observed that two evident peaks at 26.9 • and 41.6 • corresponded to the (002) and (100) lattice planes of h-BN, respectively. The intensity ratio of the (002) and (100) peaks elucidated the orientation degree of h-BN filler in the POB/PTFE or PI/PTFE composite [32,33,45]. With the increase in POB and PI content, the (002) peak of h-BN fillers gradually increased, and the (100) peak of PTFE relatively decreased.…”

Section: Effect Of Crystallization Orientation On Thermal-mechanical mentioning

confidence: 99%

“…The similar feature of the solubility and surface tension of materials should be considered when adding various polymers to the PTFE matrix [25]. Currently, the widely used blended materials are polyimide (PI) [26], polyphenylene ester (POB) [27], polyetheretherketone (PEEK) [28,29], and other polymers [30][31][32][33]. POB and PI can be blended with PTFE in any proportion due to the excellent combination, and the rigid molecular structure of POB and PI further plays a role in inhibiting the softening of PTFE-based composites [26,27,[34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

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Design of Novel POB/h-BN Co-Filled PTFE Composites with Enhanced Thermal–Mechanical Properties

et al. 2021

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Polytetrafluoroethylene (PTFE) is provided with excellent self-lubricating properties and corrosion resistance. However, the lower thermal resistance greatly limits its high-temperature applications. In the present work, two types of fillers with rigid organic polymers and submicron-sized inorganic hexagonal boron nitride (h-BN) were added to the PTFE matrix. The microstructure and thermal–mechanical properties of PTFE-based composites with different filler types or ratios were comparatively investigated. The results suggested that the polyphenyl ester (POB)/h-BN co-filled PTFE composites exhibited excellent thermal–mechanical properties compared with the polyimide (PI)/h-BN/PTFE materials at high temperature. The optimal ratios of POB and h-BN were 25 wt.% and 5 wt.%, respectively. The Vicat softening temperature of 25 wt.% POB/5 wt.% PI/PTFE composite increased by 41.3% compared to that of pure PTFE, which was due to the cross-linked reticulation structure with regularly distributed pores and higher crystallization degree. The storage modulus increased from 51.99 MPa to 685.76 MPa at 260 °C and reached 187.82 MPa at 320 °C. The uniform distribution of anisotropic orientation of the h-BN flakes showed an obvious pinning effect, and further improved the thermal–mechanical stability of POB/h-BN/PTFE composites.

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Section: Effect Of Crystallization Orientation On Thermal-mechanical mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of Novel POB/h-BN Co-Filled PTFE Composites with Enhanced Thermal–Mechanical Properties

et al. 2021

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“…Another example of PVA blends was in 2020, Cheng et al NFES manufactured a 10 wt % PVA in water solution emulsified with polytetrafluoroethylene (PTFE) with an unreported amount of boric acid for the creation of tailorable scaffolds [ 52 , 53 ]. PTFE/PVA ratios (4:1–10:1), sintering temperatures (280–430 °C), and scaffold geometries were explored while holding air gap (4 cm), applied voltage (2.85 kV), and polymer flow rate (4.2 µL/min) constant (nozzle dimensions not reported).…”

Section: Fiber Writing Of Biomedical Polymersmentioning

confidence: 99%

Near-Field Electrospinning and Melt Electrowriting of Biomedical Polymers—Progress and Limitations

King

Bowlin

2021

Polymers

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Near-field electrospinning (NFES) and melt electrowriting (MEW) are the process of extruding a fiber due to the force exerted by an electric field and collecting the fiber before bending instabilities occur. When paired with precise relative motion between the polymer source and the collector, a fiber can be directly written as dictated by preprogrammed geometry. As a result, this precise fiber control results in another dimension of scaffold tailorability for biomedical applications. In this review, biomedically relevant polymers that to date have manufactured fibers by NFES/MEW are explored and the present limitations in direct fiber writing of standardization in published setup details, fiber write throughput, and increased ease in the creation of complex scaffold geometries are discussed.

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“…[55,56]. Based on the fabrication material and procedure, the resulting membranes may have different structures (symmetric or asymmetric), pore geometry (cylindrical straight-through, spongy, branched cylindrical or rectangular pores [57]), pore size, wettability, strength, etc.…”

Section: Polymeric Membranesmentioning

confidence: 99%

Droplet breakup mechanisms in premix membrane emulsification and related microfluidic channels

Nazir

Vladisavljević

2021

Advances in Colloid and Interface Science

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Pore structure design of NFES PTFE membrane for membrane emulsification

Cited by 34 publications

References 25 publications

Design of Novel POB/h-BN Co-Filled PTFE Composites with Enhanced Thermal–Mechanical Properties

Design of Novel POB/h-BN Co-Filled PTFE Composites with Enhanced Thermal–Mechanical Properties

Near-Field Electrospinning and Melt Electrowriting of Biomedical Polymers—Progress and Limitations

Droplet breakup mechanisms in premix membrane emulsification and related microfluidic channels

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