Surface chemical modification of natural cellulose fibers

Baiardo, Massimo; Frisoni, Giovanna; Scandola, Mariastella; Licciardello, Antonino

doi:10.1002/app.2229

Cited by 200 publications

(129 citation statements)

References 42 publications

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“…The weak intensity of this peak is expected from the surface nature and the overall low extent of this reaction. In other surface esterified cellulose, similarly low carbonyl peak intensities were reported (Baiardo et al 2002). The scoured cotton showed a decomposition endotherm at 364 8C which was preceded by a small endotherm at 324 8C.…”

Section: Surface Modification With Soybean Oil On Bleached Cotton: Hesupporting

confidence: 53%

Surface modification of cellulose with plant triglycerides for hydrophobicity

2007

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Hydrophobic cotton was achieved by surface modification of the cellulose with triglycerides from several plant oils including soybean, rapeseed, olive and coconut oils. These oils were delivered to the cellulose substrates in homogeneous solutions of ethanol or acetone as well as aqueous emulsions. Surface modification was facilitated by solvent evaporation followed by heating between 110 and 120 8C for 60 min. All oils, except for coconut, produced hydrophobic and less water-absorbing cotton, supporting the desirable role of higher unsaturation in the fatty acids to achieve crosslinked network. The most hydrophobic surfaces were obtained by the reaction with 1% soybean oil in acetone. On both bleached and scoured cotton, a water contact angle of 808 and water absorption value of 0.82 mL/mg were achieved. The acquired hydrophobicity was not only retained after water washing but also improved with subsequent exposures to elevated temperatures. The surface tension of scoured cotton cellulose was lowered from 63.81 mJ/m 2 to 25.74 mJ/m 2 when modified by soybean oil delivered in acetone, which is lower than that of poly(ethylene terephthalate). An aqueous emulsion of soybean oil also rendered the scoured cotton hydrophobic, which shows promise for a green chemistry and bio-based approach to achieve water repellency on cellulosic materials.

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Section: Surface Modification With Soybean Oil On Bleached Cotton: Hesupporting

confidence: 53%

Surface modification of cellulose with plant triglycerides for hydrophobicity

2007

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“…The polarity of wood-based fillers adversely affects the dispersion of such polar materials in the nonpolar matrix. 2 A number of attempts had been made to improve the adhesion of cellulosic fillers to the polymer matrix. These attempts include both physical and chemical modification of the wood flour.…”

Section: Introductionmentioning

confidence: 99%

Effect of chemical treatment of wood flour on the properties of styrene butadiene rubber/polystyrene composites

Mansour

El‐Nashar

Abd‐El‐Messieh

2006

J of Applied Polymer Sci

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ABSTRACT:Composites from SBR/PS blend and the chemically treated wood flour have been prepared. The materials used for such treatment are NaOH, MAN, MANglycidyl methacrylate, and silane coupling agent, used to improve the dispersion of wood flour in the SBR/PS blend. The effects of chemical treatment on curing characteristics, and physicomechanical and electrical properties of SBR/PS composites were studied. The rheological as well as the mechanical parameters were improved by using the modified wood flour with MAN-glycidyl methacrylate (SMG), followed by SM obtained at 15 phr, while the other treatments slightly affect these parameters. The permittivity e 0 and dielectric loss e 00 were measured in the frequency range from 100 Hz up to 100 kHz and at temperatures ranging from 30 up to 908C. The dielectric investigations indicate that the samples containing wood flour treated with both SMG and SM increase the values of e 0 and decrease those of e 00 , which allow such samples to be used in insulation purposes. The increase in the relaxation time and the crosslinking density n for such composites indicate the increase in filler-polymer interaction rather than filler-filler interaction.

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“…These processes are presented in Scheme 4b. Steam treated flax fiber were also found to become less hydrophilic after etherification with alkaline ethyl iodide at reduced pressure [36]. Efficacy and limitations of these processes are summarized in Table 8.…”

Section: Etherificationmentioning

confidence: 97%

A brief review on the chemical modifications of lignocellulosic fibers for durable engineering composites

et al. 2015

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A brief review has been presented on the existing methods to enhance the durability of lignocellulosic fibers (LCFs) for manufacturing composites for engineering applications. The free hydroxyl groups of the cellulose chains within LCFs tend to attract water molecules in moist environment, which may cause the fibers to swell and the cellulose chains to lose their integrity due to hydrolysis and oxidation imparted by the actions of biogenic enzymes or chemical factors, such as acidity, alkalinity, and salinity or UV irradiation. This study mainly highlights those technologies that present the modifications of cellulose main chain within the LCFs to improve the degradation resistance and mechanical strength. Detailed pros and cons of those chemical modifications have also been presented in this study with possible applications of the composites with special reference to durability.

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Surface chemical modification of natural cellulose fibers

Cited by 200 publications

References 42 publications

Surface modification of cellulose with plant triglycerides for hydrophobicity

Surface modification of cellulose with plant triglycerides for hydrophobicity

Effect of chemical treatment of wood flour on the properties of styrene butadiene rubber/polystyrene composites

A brief review on the chemical modifications of lignocellulosic fibers for durable engineering composites

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