Properties of biodegradable PVA/sepiolite‐based nanocomposite fiber mats

Can, Muhammed Fatih; Avdan, L.; Bedeloğlu, Ayşe Çelik

doi:10.1002/pc.23147

Cited by 19 publications

(11 citation statements)

References 30 publications

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“…Sepiolite is another type of clay that is known as reinforcing nanoparticle in various polymer matrixes and is currently receiving immense research interest [3][4][5] . Sepiolite is another type of clay that is known as reinforcing nanoparticle in various polymer matrixes and is currently receiving immense research interest [3][4][5] .…”

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confidence: 99%

Chlorinated polyethylene (CPE)/ethylene methacrylate copolymer (EMA)/sepiolite nanocomposite via a facile one-step covalent modification technique

2015

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Graphical Abstract for the article "Chlorinated polyethylene (CPE)/ethylene methacrylate copolymer (EMA)/Sepiolite nanocomposite via a facile one-step covalent modification technique" TOC Facile one-step organo-modification of sepiolite improves polymer-filler interfacial adhesion, thereby advances mechanical property and thermal stability of CPE/EMA/sepiolite nanocomposite. ABSTRACT The work reports a facile one step covalent modification technique of sepiolite needles by in-situ polymerization of ε-caprolactone. The effective modification of sepiolite was confirmed by Fourier transform infrared (FTIR), X-Ray Diffraction (XRD), High Resolution-Transmission Electron Microscopy (HR-TEM) and water contact angle measurement. Nanocomposites of chlorinated polyethylene (CPE)/ethylene methacrylate copolymer (EMA) blend (60/40 ratio) were prepared by melt mixing the polymer blend with the pristine and poly(ε-caprolactone) modified sepiolite (PCL-g-SP). For the ease of comparison, equal filler content in both the nanocomposites was maintained (5 wt%). The effect of modified sepiolite on the mechanical and thermal properties of CPE/EMA blend of 60/40 ratio was precisely studied by ultimate tensile testing, dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA). The modified sepiolite based nanocomposite considerably showed a 47.77% improvement in ultimate tensile strength over the neat blend. Besides, a high char yield content of both the nanocomposites and 38.4% and 39.6% increment in the initial degradation temperature (T i ) values of pristine 2 and modified sepiolite based nanocomposites were observed respectively compared to the neat blend system. 3 the silica sheets in sepiolite gives rise to the characteristic structural tunnels and blocks of sepiolite along the fiber axis with a cross section 8 . These tunnels of sepiolite exhibit a sufficient quantity of H 2 O molecules along with certain exchangeable cations such as Na + , K + , and Ca 2+ 9, 10 . Unlike platelet-like clays such as MMT, the needle-like sepiolite is comparatively focused to the lesser extent in the literature. As reported by Mittal et al., the unique needle-like morphology offers an added advantage in terms of mechanical reinforcement over other clays 11 . Also, sepiolite needles proclaimed to display lower needle-to-needle contact area when it is compared to other layered phyllosilicates 12 . In addition to the needle-like morphology, the high surface area (BET 374±7 m 2 .g -1 ) of sepiolite, were demonstrated to act as a reinforcing nano-filler in some polymers 13-17 . As reported by García-López et al., an efficient organic modification of sepiolite is necessary that can drastically reduce filler-filler interaction and improve the polymer-filler interface adhesion 18, 19 . Because of the discontinuity of the external silica sheet of sepiolite, a significant number of silanol (Si-OH) groups are present on its surface 20 . The presence of such silanol groups at the edges of the tunnels increases the likelihood of effective organic...

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Chlorinated polyethylene (CPE)/ethylene methacrylate copolymer (EMA)/sepiolite nanocomposite via a facile one-step covalent modification technique

2015

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“…Poly(vinyl alcohol) (PVA) is a superabsorbent, biodegradable and biocompatible semicrystalline polymer that is generally known as a safe substance because of its nontoxic properties . Recently, PVA nanofibers have been widely studied for biomedical applications such as tissue engineering and wound dressing .…”

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confidence: 99%

Nanofiber films of chloroacetated natural rubber/poly(vinyl alcohol) by electrospinning technique: Silica effects on biodegradation

Azarian

Boochathum

2018

J of Applied Polymer Sci

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Green electrospinning technique was employed to prepare chloroacetated natural rubber (CNR)/poly(vinyl alcohol) (PVA) nanofiber films by varying the addition of PVA in the range 2.5–55 wt % followed by encapsulation of 2.5 wt % fumed silica (FS). In this study, the risk of using organic solvents was eliminated using CNR in latex. The encapsulated electrospun fiber mats showed a fairly homogenous composition with enhanced water absorption ability of 703.54% ± 33.95%. The FS improved the interfacial adhesion and contributed to enhancing the intermolecular interaction between the two polymers. The mean diameter of the nanofibers decreased from 64.0 ± 19.0 to 41.0 ± 13.0 nm and significant improvement in the hydrolytic and enzymatic degradation rate was observed implying that FS can facilitate the degradation rate. Furthermore, loading of PVA and encapsulation of FS resulted in an improved stiffness of CNR at room temperature and storage modulus increased to 2.48 and 2.12 MPa, respectively. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46432.

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“…Superabsorbent polymers have the characteristic of absorbing large amounts of water and make it available to the plants by gradually release their load into soil over a long period. PVA is a superabsorbent biodegradable polymer hydrogel that is generally known as a safe substance due to its nontoxic properties and its ability to absorb and retain large volumes of water . PVA nanofiber will be used to improve water availability and also act as a host matrix of MMT‐urea fertilizer.…”

Section: Introductionmentioning

confidence: 99%

“…PVA is a superabsorbent biodegradable polymer hydrogel that is generally known as a safe substance due to its nontoxic properties and its ability to absorb and retain large volumes of water. 5,6 PVA nanofiber will be used to improve water availability and also act as a host matrix of MMT-urea fertilizer. Lee et al 7 have prepared PVA/MMT clay nanofiber mats by the electrospinning technique with an average diameter of 250 nm containing different amount of MMT contents (1-10 wt %) which results in improvement in tensile strength and thermal stability of the nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Nanoencapsulation of intercalated montmorillonite‐urea within PVA nanofibers: Hydrogel fertilizer nanocomposite

Azarian

Mahmood

Kwok

et al. 2017

J of Applied Polymer Sci

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This study describes the preparation and characterization of nanofibers with poly(vinyl alcohol) (PVA) as the wall matrix to encapsulate montmorillonite (MMT) clay and intercalated MMT‐urea nanocomposite using an electrospinning technique. Nanofibers encapsulated with (1–5%, w/w) MMT clay were successfully produced and characterized in relation to morphological, spectroscopic, structural, surface, and thermal properties. The electrospinning conditions for voltage, flow‐rate, and emitter to collector distance were 20 kV, 0.5, and 0.25 mL/h, and 10 cm, respectively. The surface roughness increased from 43.5 (empty fibers) to 56 nm in the PVA/MMT‐3% and bead‐less nanofibers were formed with the maximum diameter distribution and mean diameter value of 45–80 and 62 nm, respectively. The d‐spacing was increased significantly from 1.004 in MMT to 1.684 nm in MMT‐urea, indicating the intercalation of urea occurred successfully. Furthermore, elemental analysis results showed that the intercalated MMT‐urea contained 30.4% nitrogen. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45957.

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Properties of biodegradable PVA/sepiolite‐based nanocomposite fiber mats

Cited by 19 publications

References 30 publications

Chlorinated polyethylene (CPE)/ethylene methacrylate copolymer (EMA)/sepiolite nanocomposite via a facile one-step covalent modification technique

Chlorinated polyethylene (CPE)/ethylene methacrylate copolymer (EMA)/sepiolite nanocomposite via a facile one-step covalent modification technique

Nanofiber films of chloroacetated natural rubber/poly(vinyl alcohol) by electrospinning technique: Silica effects on biodegradation

Nanoencapsulation of intercalated montmorillonite‐urea within PVA nanofibers: Hydrogel fertilizer nanocomposite

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