Preparation and Characterization of Biodegradable Cellulose Acetate-Starch Membrane

Zarei, Ali Reza; Ghaffarian, Vahideh

doi:10.1080/03602559.2012.752831

Cited by 45 publications

(13 citation statements)

References 28 publications

(28 reference statements)

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“…An average CA value of 69 ± 2° was measured for as-received substrate indicating a hydrophilic surface. Similar water CA values are reported for cellulose acetate film in the literature 49 . On the other hand, an average CA value of 73.1 ± 1° was recorded for pre-treated substrate.…”

Section: Resultssupporting

confidence: 89%

Vertical Alignment of Liquid Crystals Over a Functionalized Flexible Substrate

Sivaranjini

Mangaiyarkarasi

Ganesh

et al. 2018

Sci Rep

161

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A simple and effective approach for vertical alignment of liquid crystals (LCs) over a functionalized transparent flexible substrate is described. Surface characterization of this commercially available plastic substrate through X-ray photoelectron spectroscopy (XPS) and attenuated total reflection infrared spectroscopy (ATR-IR) indicated that cellulose acetate is main component of the transparent substrate. This substrate was chemically functionalized with a suitable LC compound. A trimethoxysilane terminated new rod-shaped mesogen is synthesized and covalently attached to the pre-treated film through silane condensation reaction. LC functionalization of the polymer film is confirmed through contact angle (CA), atomic force microscopy (AFM), XPS and ATR-IR spectroscopy studies. Versatility of the LC modified flexible substrates for the alignment of bulk LC sample at substrate-LC interface was assessed for nematic (N) and smectic A (SmA) phases. Remarkably, LC functionalized cellulose acetate films were found to be highly efficient in assisting a perfect homeotropic alignment of LCs (for both, a room temperature N and a high temperature SmA phase) over the entire area of the LC sample under observation indicating their superior aligning ability in comparison to their unmodified and octadecyltrimethoxysilane (OTS) modified counterparts. The demonstrated method of surface modification of flexible polymer film is easy, surface modified substrates are stable for several months, retained their aligning ability intact and more importantly they are reusable with maximum delivery.

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Section: Resultssupporting

confidence: 89%

Vertical Alignment of Liquid Crystals Over a Functionalized Flexible Substrate

Sivaranjini

Mangaiyarkarasi

Ganesh

et al. 2018

Sci Rep

161

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“…Recent developments in materials science and technology led to the adoption of a wide range of innovations in the production of new covering materials for greenhouses. Economic and environmental reasons are more and more pushing the industrial producers towards the definition of more thin plastic films, or to the formulation of new materials, that could degrade after their exploitation period [5,14,15,16,25,31,34,35,42,51,54,56,67,85,88,92] .…”

Section: Technical Properties Of Agricultural Plastic Materialsmentioning

confidence: 99%

Innovative Material and Improved Technical Design for a Sustainable Exploitation of Agricultural Plastic Film

Picuno

2014

Polymer-Plastics Technology and Engineering

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The use of plastic material in agriculture has been growing during the last decades thanks to the benefits it provides in agricultural production. The durability of plastic films is related to the meteorological and environmental conditions, as well as to the consequence of stress they are subjected to during their operational life. An improvement in the technical design of the agricultural plastic film is connected with a closer link between its chemical formulation and the engineering performance. The present article presents a general review about innovative material and new techniques for mechanical recycling of agricultural plastic film

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“…The release ratio (RR) was measured to characterize the content of urea release from PVA/U film into liquid water, and is defined by Eq. (5). After PVA/U composite films absorb water, a large number of water molecules are present in the PVA coating.…”

Section: Analysis Of Urea Release From Pva/u Filmmentioning

confidence: 99%

Nanoscaled free volume holes and slow release of urea for poly(vinyl alcohol)/urea composite films

Zhou¹,

Wang²,

Hou³

et al. 2018

3rd China-Japan Joint Workshop on Positron Science (JWPS2017)

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Poly(vinyl alcohol) coated urea films were prepared by simple tape casting. The crystallinity of the films decreased with increasing urea weight content, and hydrogen bonds were formed between PVA and urea. The size of nanoscaled free volume holes in the amorphous region were measured by positron annihilation lifetime spectroscopy, and it was found that the mean size of the free volume increased with increasing urea content. About 80 % of the urea was released from the composite film after 25 h in liquid water. The increased free volume holes supplied diffusion channels for water and urea molecules, ensuring efficient urea release from the PVA coating.

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Preparation and Characterization of Biodegradable Cellulose Acetate-Starch Membrane

Cited by 45 publications

References 28 publications

Vertical Alignment of Liquid Crystals Over a Functionalized Flexible Substrate

Vertical Alignment of Liquid Crystals Over a Functionalized Flexible Substrate

Innovative Material and Improved Technical Design for a Sustainable Exploitation of Agricultural Plastic Film

Nanoscaled free volume holes and slow release of urea for poly(vinyl alcohol)/urea composite films

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