Improving nanoparticle dispersion and polymer crystallinity in polyvinylidene fluoride/POSS coatings using tetrahydrofuran as co-solvent

Khodaie, Mehrdad; Saeidi, Ardeshir; Khonakdar, Hossein Ali; Seyfi, Javad; Hejazi, Iman; Davachi, Seyed Mohammad; Bahmanpour, Hooman

doi:10.1016/j.porgcoat.2019.105534

Cited by 13 publications

(9 citation statements)

References 31 publications

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“…Having the high thermostability, the larger specific surface area of POSS nano powder has a strong binding force with the composite matrix. Furthermore, the well dispersed POSS provides additional heat capacity in the composite matrix, which acts as a barrier for heat transfer 31,32 . However, the continuous addition of POSS has obvious agglomeration in the matrix, which causes the surface effect of the POSS to be difficult to exert effectively.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, the well dispersed POSS provides additional heat capacity in the composite matrix, which acts as a barrier for heat transfer. 31,32 However, the continuous addition of POSS has obvious agglomeration in the matrix, which causes the surface effect of the POSS to be difficult to exert effectively. As the size of POSS aggregate increases, the stability and continuity of the composite matrix are damaged.…”

Section: Thermal and Ionic Conductivity Properties Of Cpecsmentioning

confidence: 99%

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Flexible anodic bonding for the bonding between elastomer and metal

Zhao¹,

Liu

et al. 2022

J of Applied Polymer Sci

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Considering the inadaptability of traditional anodic bonding to polymer materials, the flexible anodic bonding process is developed. The bonding characteristics of the dynamic intelligent electric fields with the low-temperature plasma surface treatment to polymer and ultrasonic-assisted preconnection before bonding are very suitable for the anodic bonding of polymer elastomer to aluminum (Al) sheet. A series of composite polyurethane elastomer cathode materials (CPECs) with good bonding properties are prepared and characterized. The highest ionic conductivity of CPECs can reach to 2.7 Â 10 À3 S/cm (CPEC2) at 75 C. After bonded, it is determined that a uniform and dense intermediate bonding layer showed by SEM is formed between CPECs and Al. In addition, different elements including C, O, F, S, and Al are clearly iden-

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Section: Resultsmentioning

confidence: 99%

Section: Thermal and Ionic Conductivity Properties Of Cpecsmentioning

confidence: 99%

Flexible anodic bonding for the bonding between elastomer and metal

Zhao¹,

Liu

et al. 2022

J of Applied Polymer Sci

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“…In addition to all these properties, the nanoscale size of POSS makes it an effective filler that increases the crystallinity of the polymers as a nucleating agent for semi‐crystalline polymers. [ 10,11 ]…”

Section: Introductionmentioning

confidence: 99%

“…In addition to all these properties, the nanoscale size of POSS makes it an effective filler that increases the crystallinity of the polymers as a nucleating agent for semi-crystalline polymers. [10,11] There are many studies in which POSS-PEG hybrid materials are prepared to improve the mechanical properties of composite materials. [12,13] Poly (ethylene glycol) (PEG) is a polyether with important applications ranging from industrial production to medicine due to its superior hydrophilicity, high biocompatibility, and so forth.…”

Section: Introductionmentioning

confidence: 99%

Thermal and morphological investigation of the effect of POSS‐(PEG₂₀₀₀)₈ addition to UV curable PEGMEA/PEGDA formulation and simultaneously in situ formed silver nanoparticles

Kazancioglu

Batibay

Uner

et al. 2021

Journal of Polymer Science

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In this study, hybrid nanocomposites were synthesized by photo‐crosslinking of poly (ethylene glycol) methyl ether acrylate/poly (ethylene glycol) diacrylate monomer system using 2‐ (carboxymethoxy) thioxanthone and POSS‐(PEG2000)8. Additionally, AgNO3 was added to this formulation and in situ formation of silver nanoparticles onto hybrid nanocomposites were achieved in one‐step. UV–Vis spectroscopy technique was used as a very useful tool for surface plasmon resonance band detection of silver nanoparticles. In addition to thermogravimetric analyses which were performed in nitrogen atmosphere to determine the thermal stability of the nanocomposites, dynamic light scattering, and scanning electron microscopy techniques were also used for size and morphology of silver nanoparticles in a hybrid network. TGA analyses proved that even the addition of a very low amount of POSS‐(PEG2000)8 made noteworthy contribution to thermal stability especially in the presence of silver nanoparticles in the hybrid network. The swelling capacities of the prepared films were examined at 1, 3 and 24 h in phosphate buffer solution (pH = 7.4). It was found that film containing only POSS‐(PEG2000)8 had the highest swelling ratio in the shortest time.

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“…In past decades, PVDF has been widely employed as a suitable membrane material because of its exceptional features such as high processability with superior mechanical, chemical, and thermal resistance. , It has also been reported that the PVDF’s crystalline phase has a considerable effect on the resulting membrane performance . For example, PVDF membranes with high β-phase contents show improved performance for conventional ultrafiltration and microfiltration water treatment applications.…”

Section: Introductionmentioning

confidence: 99%

Origin of Fluoropolymer Affinity toward Water and Its Impact on Membrane Performance

Shah

Heo

Park

et al. 2020

ACS Appl. Polym. Mater.

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Fluoropolymers exhibit very high hydrophobicity because of the presence of fluorine groups. However, they sometimes exhibit peculiar polarityreferred to as "polar hydrophobicity"depending on their crystal polymorphs. This intriguing phenomenon is not yet clearly understood, and it remains a challenge to tailor this rare property for desired applications. Particularly, water desalination via membrane distillation (MD) is an emerging process, which requires hydrophobic membranes with extremely low affinity toward water molecules. In this study, we investigated the water affinity of fluoropolymers, namely, vinylidene fluoride (VDF) and hexafluoropropylene (HFP) groups, and their correlation with membrane performance. The molecular origin of fluoropolymer polarity was examined via density functional theory analysis, which unveiled that β-phase VDF crystals have twice as many water-favorable sites as the α-phase, whereas HFP groups exhibit lowest interaction energy with water. To maximize membrane hydrophobicity, we synthesized P(VDFco-HFP) polymers with varying VDF-to-HFP ratios and fabricated porous membranes with similar pore sizes using the electrospinning technique. Upon thorough characterization, a clear inverse correlation was observed between the β-phase VDF crystals and the observed hydrophobicity and performance, confirming the source of fluoropolymer polarity. The polymorphcontrolled membranes exhibited a unique optimum at 8% HFP content with 35-fold enhancement in MD long-term stability compared to that of pristine polyvinylidene fluoride membranes. It is highlighted in this work that the polymer mechanical properties cannot be compromised over the desired hydrophobic properties in membrane contactor processes.

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Improving nanoparticle dispersion and polymer crystallinity in polyvinylidene fluoride/POSS coatings using tetrahydrofuran as co-solvent

Cited by 13 publications

References 31 publications

Flexible anodic bonding for the bonding between elastomer and metal

Flexible anodic bonding for the bonding between elastomer and metal

Thermal and morphological investigation of the effect of POSS‐(PEG₂₀₀₀)₈ addition to UV curable PEGMEA/PEGDA formulation and simultaneously in situ formed silver nanoparticles

Origin of Fluoropolymer Affinity toward Water and Its Impact on Membrane Performance

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Improving nanoparticle dispersion and polymer crystallinity in polyvinylidene fluoride/POSS coatings using tetrahydrofuran as co-solvent

Cited by 13 publications

References 31 publications

Flexible anodic bonding for the bonding between elastomer and metal

Flexible anodic bonding for the bonding between elastomer and metal

Thermal and morphological investigation of the effect of POSS‐(PEG2000)8 addition to UV curable PEGMEA/PEGDA formulation and simultaneously in situ formed silver nanoparticles

Origin of Fluoropolymer Affinity toward Water and Its Impact on Membrane Performance

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Product

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Thermal and morphological investigation of the effect of POSS‐(PEG₂₀₀₀)₈ addition to UV curable PEGMEA/PEGDA formulation and simultaneously in situ formed silver nanoparticles