Thermal stability of polyvinyl alcohol/nanocrystalline cellulose composites

Воронова, М. И.; Суров, О. В.; Guseinov, S. S.; Barannikov, V. P.; Захаров, А. Г.

doi:10.1016/j.carbpol.2015.05.032

Cited by 151 publications

(103 citation statements)

References 35 publications

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“…TGA thermograms of nPVA, XPVA, and CNCs are presented in Figure (a). The nPVA thermogram shows three main thermal degradation transition stages, similar to other observations . The initial transition region is found up to 100 °C and is due to water evaporation.…”

Section: Resultssupporting

confidence: 87%

“…Moreover, no significant effect of CNCs on T m of the XPVA films could be found. Similar results for T m have been reported for PVA composites with CNCs . It is worth mentioning that the broadened melting peaks of the crosslinked PVA films with CNCs were observed compared to the sharp peak of the nPVA because the ordered association of the PVA molecules was changed by the presence of CNCs and crosslinking .…”

Section: Resultssupporting

confidence: 84%

“…When the temperature is higher than 400 °C, the third weight loss occurs because of the decomposition of carbonaceous residues. A high amount of the char residue (∼25% at 850 °C) from CNCs could be measured because of the sulfate groups on CNC surface acting as a flame retardant . The effects of CNCs on thermal stabilities of the XPVA films are shown in Figure (b).…”

Section: Resultsmentioning

confidence: 99%

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Crosslinked poly(vinyl alcohol) composite films with cellulose nanocrystals: Mechanical and thermal properties

Tanpichai

Oksman

2017

J of Applied Polymer Sci

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In this work, poly(vinyl alcohol) (PVA) and cellulose nanocrystals (CNCs) were crosslinked using sodium tetraborate decahydrate (borax) to improve the mechanical and thermal properties of the neat PVA. The results showed that the CNCs affected the crystallization behavior of the crosslinked PVA. The crystallization temperature of the crosslinked PVA with CNCs increased considerably from ∼152 to ∼187 °C. The continuous improvement of the thermal stability was observed with the increasing content of CNCs in the crosslinked PVA films. Additionally, the strong interaction between the CNCs and PVA was theoretically estimated from the Young's modulus values of the composites. Thermodynamic mechanical testing revealed that the crosslinked PVA composite films with CNCs could bear higher loads at high temperature compared to the films without the CNCs. At 60 °C, 2.7 GPa was reported for the storage modulus of the crosslinked composites with 3 wt % of CNCs, twice as high as that for the crosslinked films without CNCs. Moreover, creep results were improved when CNCs were added in the crosslinked nanocomposites. The materials prepared in this work could broaden the opportunities for applications in a wide range of temperatures. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45710.

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Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 84%

Section: Resultsmentioning

confidence: 99%

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Crosslinked poly(vinyl alcohol) composite films with cellulose nanocrystals: Mechanical and thermal properties

Tanpichai

Oksman

2017

J of Applied Polymer Sci

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“…5b) showed two steps of decomposition, one between 150 and 3008C with a maximum peak of 1868C and other between 300 and 5008C with a maximum peak of 3838C. A similar behavior was reported for NCC prepared from commercial microcrystalline cellulose (MCC) in the literature [24]. Compared with the thermal decomposition of cotton, the first step of the decomposition of NCC (T d1 ) at 1868C may be a result from the lower thermal stability of the smallest nanosized population of crystalline cellulose (whiskers); while the second step (T d2 ) at 3838C belongs to the larger microsized population of the NCC (fibers).…”

Section: Phema Nanocomposite Hydrogelssupporting

confidence: 78%

Hydrogels of poly(2‐hydroxyethyl methacrylate) reinforced with nanocrystalline cellulose as candidates for biomaterials

2016

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Nanocomposite hydrogels were prepared based on crosslinked poly(2‐hydroxyethyl methacrylate) (PHEMA) as polymer matrix and nanocrystalline cellulose fibers (NCC) as nanomaterial filler. NCC fibers were obtained by acid hydrolysis of cotton and pristine PHEMA and PHEMA nanocomposite hydrogels were synthesized by photopolymerization. Physicochemical, thermal, and mechanical properties of pristine and nanocomposite hydrogels were evaluated by differential scanning calorimetry, thermogravimetric analysis, mechanical tests by submersion compression, and measurements of swelling at equilibrium. Results showed that the compressive modulus of PHEMA hydrogels increased significantly with addition of only 1wt% of NCC fibers. Furthermore, PHEMA nanocomposite hydrogels exhibit higher water swelling degree and are thermally more stable than pristine PHEMA hydrogels. POLYM. COMPOS., 39:E278–E285, 2018. © 2016 Society of Plastics Engineers

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“…6. A strong broad band at 3491 cm À 1 that can be assigned to -OH stretching vibration of pure PVA is shifted to 3436 cm À 1 in both nanocomposites confirming the presence of the PVA in the nanocomposites [50]. Vibration peaks at 2986 and 2926 cm À 1 correlate with the C-H asymmetric stretching of the vinyl acetate group of the PVA and shifted to 2932 and 2905 cm À 1 and 2927, 2911 cm À 1 in ZnS and CdS/PVA composites.…”

Section: Ft-ir Spectroscopic Study Of Nanocompositessupporting

confidence: 62%

Morphology and thermal studies of zinc sulfide and cadmium sulfide nanoparticles in polyvinyl alcohol matrix

Osuntokun

Ajibade

2016

Physica B: Condensed Matter

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Thermal stability of polyvinyl alcohol/nanocrystalline cellulose composites

Cited by 151 publications

References 35 publications

Crosslinked poly(vinyl alcohol) composite films with cellulose nanocrystals: Mechanical and thermal properties

Crosslinked poly(vinyl alcohol) composite films with cellulose nanocrystals: Mechanical and thermal properties

Hydrogels of poly(2‐hydroxyethyl methacrylate) reinforced with nanocrystalline cellulose as candidates for biomaterials

Morphology and thermal studies of zinc sulfide and cadmium sulfide nanoparticles in polyvinyl alcohol matrix

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