Effect of hydrothermal pretreatment on solubility and formation of kenaf cellulose membrane and hydrogel

Gan, Sinyee; Zakaria, Sarani; Chia, Chin Hua; Padzil, Farah Nadia Mohammad; Ng, Peivun

doi:10.1016/j.carbpol.2014.08.093

Cited by 44 publications

(29 citation statements)

References 19 publications

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“…1) and Huggins equation (Eq. 2) were used to calculate the [ŋ] value obtained by extrapolating the graph to zero concentration (c) (Gan et al 2015). By using Eqs.…”

Section: Viscosity Measurement and Molecular Weight Calculation For Lclmentioning

confidence: 99%

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Synthesis of Liquid Hot Water Cotton Linter to Prepare Cellulose Membrane using NaOH/Urea or LiOH/Urea

Gan¹,

Padzil²,

Zakaria³

et al. 2015

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The liquid hot water (LHW) pretreatment on cotton linter (CL) was carried out using an autoclave heated in a hot oil bath. The LHW pretreated CL (LCL) was dissolved in NaOH/urea and LiOH/urea aqueous solutions and subsequently used to produce cellulose membrane. The effects of LHW pretreatment, amount of cellulose, and type of alkaline solvent on properties of cellulose solution and cellulose membrane were studied.The formation of cellulose II and crystallinity index (CrI) on the cellulose membranes were confirmed by X-ray diffraction (XRD). The morphology of cellulose membranes were observed by field emission scanning electron microscopy (FESEM). The LHW pretreatment resulted in higher cellulose solubility, higher cellulose solution viscosity, and improved properties of regenerated cellulose products compared to non-treated cellulose. Results also revealed that the amount of cellulose used affected the solubility and viscosity of the cellulose solution and the higher dissolving power of the LiOH/urea system as compared to the NaOH/urea system. In fact, higher solubility and viscosity properties are key factors in many cellulose applications such as membranes, fibers, hydrogels, and other regenerated cellulose products.

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“…1) and Huggins equation (Eq. 2) were used to calculate the [ŋ] value obtained by extrapolating the graph to zero concentration (c) (Gan et al 2015). By using Eqs.…”

Section: Viscosity Measurement and Molecular Weight Calculation For Lclmentioning

confidence: 99%

“…The morphology and pore size of cellulose membranes were measured using a Zeiss/Supra 55VP field emission scanning electron microscope (FESEM, Germany). 5), and the degree of polymerization (DP) can be found (Gan et al 2015):…”

Section: Characterizationsmentioning

confidence: 99%

Synthesis of Liquid Hot Water Cotton Linter to Prepare Cellulose Membrane using NaOH/Urea or LiOH/Urea

Gan¹,

Padzil²,

Zakaria³

et al. 2015

BioResources

Self Cite

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“…Bagi mengatasi masalah persekitaran ini, banyak larutan akues yang tidak mencemarkan dan sistem larutan organik seperti kombinasi larutan NaOH-bahan tambahan-air (Mohd Said et al 2016), N-metilmorfolin-N-oksida (Rosenau et al 2002) dan cecair ionik (Ils) telah digunakan sebagai pelarut selulosa. Selulosa yang terlarut perlu dijana semula di dalam larutan penggumpal tertentu bagi menyediakan produk selulosa terjana semula daripada larutan selulosa (Gan et al 2015a(Gan et al , 2015b. Ciri-ciri membran terjana semula amat berkait rapat dengan struktur dan morfologinya dan ia dikawal oleh keadaan penggumpal, sifat penggumpal dan mekanisma penggumpalan.…”

Section: Pendahuluanunclassified

“…Ini menunjukkan telah berlaku transformasi yang jelas daripada selulosa I (selulosa asli) kepada selulosa II dalam proses pelarutan. Fakta ini disokong oleh Gan et al (2015b) dan Padzil et al (2015). Jadual 2 menunjukkan nilai indeks kehabluran (IK) bagi membran terjana semula.…”

Section: Bahanunclassified