Infrared spectra of alkali treated jute stick

Reddy, S. S.; Bhaduri, S. K.; Sen, S. K.

doi:10.1002/app.1990.070410125

Cited by 16 publications

(11 citation statements)

References 5 publications

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“…The increased intensity of this band after alkaline modi®cation has already been reported by Reddy et al (1990).…”

Section: Particle Characterizationsupporting

confidence: 49%

“…After treatment with NaOH, the band splits into two, one at 1240±1265 cm A1 and the other at 1225 cm A1 . The ®rst band is caused by vibrations in the structure of the guaiacyl structure of the lignin and the second one is due to vibrations of the syringyl structure (Roy, 1991).This band split is characteristic of the alkaline treatment of lignocellulosic materials, as has been reported previously (Roy, 1991;Reddy, 1990).…”

Section: Particle Characterizationmentioning

confidence: 55%

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Oak sawdust and hazelnut shells as fillers for a polyester thermoset

Aranguren

Reboredo

Demma

et al. 1999

Holz als Roh- und Werkstoff

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Composites made from a styrene cross linked unsaturated polyester resin and vegetable particles (oak sawdust and milled hazelnut shells) were prepared. The in¯uence of the particle's chemical treatment on the ®nal properties of the materials was investigated. The ®llers were modi®ed by a simple alkaline treatment or by further addition of acrylic acid to the hydroxyl groups of the lignocellulosic materials. The modi®cation changed the chemistry of the particles as determined by infrared spectroscopy. Three-point bending tests were performed on the composites ®lled with the different sawdust batches and with untreated milled hazelnut shells. The modulus was maximum for the composite made with alkaline treated sawdust. However, the ultimate strength as well as the displacement were best if the ®bers were acrylic acid treated. Composites made with milled shells showed the lowest ultimate properties. Sa Ègespa Ène von Eichenholz und Haselnuûschalen als Fu Èller fu Èr Polyester-Thermoplasten Diese Arbeit beschreibt die Herstellung von Kompositmaterialen aus ungesa Èttigtem Polyesterharz, quervernetzt mit Styrol, und p¯anzlichen Abfallprodukten (Sa Ègespa Ène von Eichenholz und Haselnuûschalen). Der Ein¯uû einer chemischen Vorbehandlung der Fu Èller wurde untersucht. Die chemische Modi®zierung erfolgte durch Alkalibehandlung oder Ankoppelung von Acrylsa Èure an die OHGruppen der Lignocellulosen. Die chemischen Vera Ènde-rungen wurden mittels Infrarotspektroskopie (FTIR) verfolgt. Die Festigkeit der Werkstoffe mit unterschiedlichem Fu Èlleranteil wurde mit einer Drei-Punkt-Biegepru Èfung bestimmt. Maximale MOE-Werte wiesen die Werkstoffe mit alkalibehandelten Sa Ègespa Ènen auf. Die besten Werte in Bezug auf Festigkeit und Verformung erzielten die mit Acrylsa Èure modi®zierten Materialien. Die Werkstoffe mit gemahlenen Haselnuûschalen als Fu Èller zeigten die niedrigsten Eigenschaftswerte.

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“…The increased intensity of this band after alkaline modi®cation has already been reported by Reddy et al (1990).…”

Section: Particle Characterizationsupporting

confidence: 49%

Section: Particle Characterizationmentioning

confidence: 55%

Oak sawdust and hazelnut shells as fillers for a polyester thermoset

Aranguren

Reboredo

Demma

et al. 1999

Holz als Roh- und Werkstoff

View full text Add to dashboard Cite

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“…The intensity of the band at 1,158 cm -1 increased after extraction; this could be due to the Table 3 Position and assignment of IR bands measured by ATR-FTIR (Tsuboi 1957;Chua and Wayman 1979;Kuo et al 1988;Owen and Thomas 1989;Reddy et al 1990;Faix et al 1991;Roy et al 1991;Faix and Bottcher 1992;Pandey and Theagarajan 1997;Pandey and Pitman 2003) Band position (cm -1 ) change in the structure of the cellulose or because of aromatic C-H in plane deformation of the lignin as reported by Roy et al (1991). The bands at 1,105, 1,048, and 898 cm -1 mainly relate to cellulose and hemicellulose, and have lower intensity after extraction.…”

Section: Resultsmentioning

confidence: 97%

“…This strong band is due to the presence of methyl and methylene groups in lignin, cellulose, and hemicellulose (Roy et al 1991). The extracted sample's C-H band has a shoulder at 2,845 cm -1 , which contribute to CH 2 symmetrical stretching (Reddy et al 1990;Tsuboi 1957).…”

Section: Resultsmentioning

confidence: 97%

Effects of decreasing carbohydrate content on properties of wood strands

et al. 2011

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Hot-water pretreatment was performed on wood strands to investigate effects of the extraction of hemicellulose under different temperature (140, 155, and 170°C) and time durations (30 and 60 min) conditions. Hydrolysate was analyzed by means of high-performance liquid chromatography. Chemical changes in the surface of wood strands were studied by infrared spectroscopy. The effects of hemicellulose extraction on the wettability of wood strands were studied by measuring the contact angle and surface free energy. The mechanical properties of wood cell walls before and after treatment were studied by nanoindentation. Among the extracted monosaccharides, mannose was found in the highest concentration. The mechanical properties of cell walls showed little decrease after extraction. The chemical changes in the surface of the wood strands reduced wettability of wood surface by water and produced hydrophobic characteristics after extraction.

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“…All these components are active ion exchangers and based on their electron-donating nature and the electron-accepting nature which can be used to adsorb dye and other components of the effluent (Suemitsu et al 1986;Shukla et al 2002). In the contrary, JSP without pretreatment have smooth and hard surface indicating the presence of complex cellulose, hemicellulose and lignin framework (Reddy et al 1990). That is why various chemical and physical treatments have been applied to break down the complex structure of JSP to improve the adsorption performance of many lignocellulosic materials (Robinson et al 2002;Chun et al 2004).…”

Section: Adsorption Capacity Of Differently Pretreated Jute Stick Powdermentioning

confidence: 99%

Gamma irradiation and steam pretreatment of jute stick powder for the enhancement of dye adsorption efficiency

et al. 2017

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The aim of this study is to find out the facile and effective pretreatment technique to enhance the capacity of jute stick powder (JSP) in adsorbing dye from raw textile effluent. Hence, different pretreatment techniques, i.e., radiation treatment, alkali treatment, ammonia treatment, steam treatment and CaCl 2 treatment were applied to JSP and the adsorbing performance were examined for synthetic dye solutions (Blue FCL and Red RL dye). Different gamma radiation doses were applied on JSP and optimum dye removal efficiency was found at 500 krad in removing these two dyes (50 ppm) from solutions. Among the different pretreatment techniques, gamma irradiated JSP (500 Krad) exhibits highest dye uptake capacity for RED RL dye, whereas steam-treated JSP shows highest performance in adsorbing blue FCL dye. Subsequently, we applied the gamma irradiated and steam-treated JSP on real textile effluent (RTE) and these two techniques shows potentiality in adsorbing dye from raw textile effluent and in reducing BOD 5 , COD load and TOC to some extent as well. Fourier transform infrared spectroscopy (FTIR) analysis also proved that dye has been adsorbed on pretreated JSP.

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Infrared spectra of alkali treated jute stick

Cited by 16 publications

References 5 publications

Oak sawdust and hazelnut shells as fillers for a polyester thermoset

Oak sawdust and hazelnut shells as fillers for a polyester thermoset

Effects of decreasing carbohydrate content on properties of wood strands

Gamma irradiation and steam pretreatment of jute stick powder for the enhancement of dye adsorption efficiency

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