Dynamical study of the water penetration process into a cellulose acetate film studied by coherent anti-Stokes Raman scattering (CARS) microspectroscopy

Fujisawa, Rie; Ohno, Tomoya; Kaneyasu, Junya F.; Leproux, Philippe; Couderc, Vincent; Kita, Hiroshi; Kano, Hideaki

doi:10.1016/j.cplett.2016.05.038

Cited by 10 publications

(4 citation statements)

References 30 publications

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“…In the 1790–1730 cm −1 region, CO stretching corresponding to acetylation is observed 71 . The presence of the OH bending mode is observed at 1700 cm −1 72 . The OH bending vibration derived from H‐bonded penetrated water and H‐bonded OH groups in pyranose rings are detected at 1660 cm −1 72 .…”

Section: Resultsmentioning

confidence: 96%

“…71 The presence of the OH bending mode is observed at 1700 cm −1 . 72 The OH bending vibration derived from Hbonded penetrated water and H-bonded OH groups in pyranose rings are detected at 1660 cm −1 . 72 Also, HCC and HOC bending at 1445 cm −1 , HCC, HCO and HOC bending at 1383 cm −1 , HCC and HCO bending at 1325 cm −1 , 67 cellulose II at 1260 cm −1 , 73 glycosidic bonds at 700 cm −1 , 67 CCH bending at 600 cm −1 , 74 COC glycosidic of cellulose II at 491 cm −1 , CCC, CCO ring deformation at 430 cm −1 , 73 of type I cellulose, were detected.…”

Section: Resultsmentioning

confidence: 99%

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CNCs extraction from single‐use cups: effects of grafting it onto MMA monomer

Juárez‐Méndez

Palma‐Ramírez

Brachetti-Sibaja

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUND: The difficulty of separating fiber from polyolefin coatings of single-use plastic (SUP) cups for cold (carbonated) or hot (coffee) drinks, has led us to investigate a recycling method to obtain new high-performance materials. The present work relates to valorization of ICEE S.A. de C.V. cups into crystalline nanocellulose (CNC), while studying the effects on the structural, thermal, morphological and particle size properties in dependence of the acid hydrolysis concentration (40 and 64% v/v) employing sulfuric acid to remove amorphous cellulose.RESULTS: On the basis of results, optimal CNC was found at 64% v/v concentration obtaining ribbon-like morphologies rich in cellulose types I⊍ (27%) and II (45.1%) of triclinic and monoclinic structures, respectively, high crystallinity percentage (91%) and nanosize scale (26.70 nm). CNC was successfully grafted through the C 2 in cellulose onto the methyl methacrylate (MMA) monomer to obtain PMMA-g-CNC, considering different concentrations (5, 10, 20 and 30 wt%) of CNC. A reduction of crystallinity % was found when CNC is grafted onto MMA owing to the amorphous nature of the poly(methyl methacrylate) (PMMA). However, this is not a limitation.CONCLUSIONS: PMMA-g-CNC samples displayed high thermal stability (345 °C) and nanometric scale (165-260 nm), which have potential to be studied as reinforcement agents for incompatible polymers such as PMMA and poly(urethane) (PU) through Interpenetrating Polymer Networks. Preliminary mechanical studies indicated that PMMA-g-CNC systems are able to reinforce the tensile properties becoming the PMMA/PU into ductile materials. Specially, the MMA 90 CNC 10 system improved the strain four-fold compared to the pure PMMA/PU IPN.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

CNCs extraction from single‐use cups: effects of grafting it onto MMA monomer

Juárez‐Méndez

Palma‐Ramírez

Brachetti-Sibaja

et al. 2023

J of Chemical Tech & Biotech

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“…The stretch at 1453 cm –1 corresponded to the C–H deformation [ 25 ]. For the paper base spectra, lines 1081 cm –1 and 1121 cm –1 could be attributed to cellulous pyranose ring signal [ 27 , 28 ] and “breathing mode” of the pyranose ring [ 29 ]. Stretches at 1329 cm –1 and 1603 cm –1 could be attributed to lignin aromatic ring motion [ 25 ].…”

Section: Resultsmentioning

confidence: 99%

An Investigative Study on the Effect of Pre-Coating Polymer Solutions on the Fabrication of Low Cost Anti-Adhesive Release Paper

et al. 2020

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This work describes a novel approach to produce high quality release paper at lower cost than traditional methods. The anti-adhesive properties of release paper require the use of expensive machine glazed kraft or “Glassine” paper as the paper base. A series of polymer coatings including polyvinyl alcohol, carboxymethyl cellulose, polyethylene vinyl acetate, and polystyrene were chemically synthesized and coated onto a low cost pulp paper base. Surface roughness (Sa) and smoothness coefficients (k) were determined by atomic force microscopy (AFM), and the interactions between the polymer coating and base paper were investigated by Raman spectroscopy. Studies show the use of polyethylene vinyl acetate (PEVA) as a pre-coating layer on low cost pulp paper exhibits similar anti-adhesive properties as higher cost paper bases. In low margin markets such as the production of release paper, decreases in cost are critical to industry survival.

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“…It is widely used in chemistry, 27‐30 material science, 17,31 biomedicine, 32‐36 heritage identification 37,38 and criminal investigations 39 . Some researchers have focused on surface‐enhanced Raman spectroscopy 40 imaging to study the penetration behaviour of several pesticides in spinach leaves over time 41,42 . In the field of dyeing, Raman spectroscopy and computer programs were used to implement the decomposition of the component spectra of wool fibres dyed with various dyes 43 .…”

Section: Introductionmentioning

confidence: 99%

A study of the diffusion behaviour of reactive dyes in cellulose fibres using confocal Raman microscopy

Yang

Dai

Zhong

et al. 2020

Coloration Technology

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Confocal Raman microscopy was used as a non‐destructive tool for in situ investigation of the diffusion of CI Reactive Blue 194 in viscose fibres. Dyed fibres were analysed by Raman depth imaging along the radius at different dyeing times (30, 60, 90, 120, 150, 180, 240, 300, 600, 900, 1200, 1500, 1800, 2100 and 2400 seconds) and temperatures (30, 40, 50, 60, 70 and 80°C). The dye concentration in the fibre was expressed by normalising the characteristic peak of dyes at 1577 cm−1 to eliminate the interference of the fibre. The Raman depth mapping images showed that dye molecules gradually diffused to the interior of the fibre with an increase in dyeing time, remaining ring‐shaped in the state of diffusion. In addition, the diffusion rate increased with increases in the dyeing temperature. This was understandable because dye molecules with a higher kinetic energy move faster. It was also found that the external structure of fibres played a significant role in the diffusion behaviour of CI Reactive Blue 194 during the initial stage of dyeing. The concentration gradient distribution of CI Reactive Blue 194 in the fibre was reflected by Raman depth mapping. The study demonstrates the potential of confocal Raman microscopy for monitoring the dynamic diffusion of dye molecules in fibres.

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Dynamical study of the water penetration process into a cellulose acetate film studied by coherent anti-Stokes Raman scattering (CARS) microspectroscopy

Cited by 10 publications

References 30 publications

CNCs extraction from single‐use cups: effects of grafting it onto MMA monomer

CNCs extraction from single‐use cups: effects of grafting it onto MMA monomer

An Investigative Study on the Effect of Pre-Coating Polymer Solutions on the Fabrication of Low Cost Anti-Adhesive Release Paper

A study of the diffusion behaviour of reactive dyes in cellulose fibres using confocal Raman microscopy

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