A green route to prepare cellulose acetate particle from ramie fiber

Liu, Zhao‐Tie; Fan, Xiushan; Wu, Jin; Zhang, Lili; Song, Liping; Gao, Ziwei; Dong, Wen‐Sheng; Xiong, Huiming; Peng, Yu; Tang, Shouwei

doi:10.1016/j.reactfunctpolym.2006.10.001

Cited by 23 publications

(10 citation statements)

References 9 publications

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“…These FT-IR spectroscopic data indicate that C 10 -C 14 alkyl cellulose ester sulfate surfactants were successfully prepared from cellulose segments. It was similar to reports in the literature [26,27] (Fig. 2).…”

Section: Molecular Structure Characteristic Of C 10 -C 14 Alkyl Cellusupporting

confidence: 92%

Preparation and Characterization of C₁₀–C₁₄Alkyl Cellulose Ester Sulfate Surfactant

Yang

Liu

et al. 2013

J Surfact & Detergents

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The aim of this work is to synthesize surfactants based on cellulose with different molecular weights. Raw cotton cellulose was tailored into cellulose segments with different molecular weights by a hydrothermal process, then the average degree of polymerization (DP) was determined by viscosimetry and the molecular weight distribution was estimated by gel permeation chromatography. The C10–C14 alkyl cellulose ester sulfate surfactants were prepared by hydrophilic sulfonation and hydrophobic esterification. The surface tension of the surfactants solution was obtained by the Wilhelmy plate method. Results showed that the cellulose segments presented a broader distribution compared with the raw material. The critical micelle concentration (CMC) value decreased from 1.08 to 0.86 wt% as the hydrophobic chain length was increased from 10 to 14. The CMC values of cellulose surfactants with C14‐acyl chloride hydrophobization decreased from 1.32 to 0.86 wt% as the DP was decreased from 2,700 to 296.

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Section: Molecular Structure Characteristic Of C 10 -C 14 Alkyl Cellusupporting

confidence: 92%

Preparation and Characterization of C₁₀–C₁₄Alkyl Cellulose Ester Sulfate Surfactant

Yang

Liu

et al. 2013

J Surfact & Detergents

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“…Ramie fiber is applied in increasing fields including clothing fabrics, twines, industrial packaging, cordages, car outfits, canvas etc. due to its excellent properties such as high tensile strength, excellent thermal conductivity, coolness, ventilation function, moisture absorption and antibacterial function, and especially, its higher content of cellulose (65-75 wt%) than the other bast fibers such as hemp, flax and jute (Goda et al 2006;Liu et al 2007a). However, the properties of high degree of crystallinity and orientation restrict further utilization and exploitation of ramie fibers.…”

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confidence: 99%

Grafting from ramie fiber with poly(MMA) or poly(MA) via reversible addition-fragmentation chain transfer polymerization

Chen

Sun

et al. 2009

Cellulose

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Reversible addition-fragmentation chain transfer (RAFT) polymerization was utilized to control the grafting of methyl methacrylate (MMA) and methyl acrylate (MA) from natural ramie fibers substrate. The hydroxyl groups of ramie fibers were first converted to 2-dithiobenzoyl isobutyrate as a RAFT chain transfer agent (CTA), which was further grafted with MMA or MA mediated by the RAFT polymerization in a presence of 2-(ethoxycarbonyl) prop-2-yl dithiobenzoate as a free chain transfer agent. Hydrophobic poly(MMA) or poly(MA) modified ramie fibers with contact angles greater than 130°were obtained. The modified ramie fibers were analyzed by gravimetry, Fourier transform infrared spectroscopy, scanning electron microscopy, differential scanning calorimetry, thermogravimetry and contact angle measurements. The results indicate that the polymer chains had indeed been grafted from the surface of the ramie fibers with an average 33% of the hydroxyl groups in the raw ramie fiber substituted by 2-bromoisobutyryl bromide and an average grafting ratio of 25% poly(MMA) or poly(MA) related to ramie fiber. The homopolymers formed in the copolymerization were also analyzed to estimate molecular weights and polydispersity indices of grafting chains from the surface of ramie fibers by size exclusion chromatography, which showed narrow polydispersity with the PDIs to be \1.32. This study provides a novel and feasible approach to the preparation of functional composite materials for utilizing the abundant natural ramie fiber cellulose resource. Keywords RAFT Á Ramie fiber Á Grafting polymerization Á Modification Á Hydrophilicity/hydrophobicity Abbreviations MMA Methyl methacrylate MA Methyl acrylate BIBB 2-Bromoisobutyryl bromide ECPDB 2-(Ethoxycarbonyl)prop-2-yl dithiobenzoate AIBN 2,2 0 -Azobis(isobutyronitrile) THF Tetrahydrofuran NMP N-methyl-2-pyrrolidone DMAP 2-(Dimethylamino)pyridine CTA Chain transfer agent TMS Tetramethylsilane RAFT Reversible addition-fragmentation chain transfer FT-IR Fourier transform infrared spectroscopy

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“…This reaction condition continues until it is a homogeneous environment in the solution. At the end of the reaction, the small diffraction peaks has been weakened on XRD patterns by decreasing DS value with the increase in hydrolysis time . CTA and CDAs did not display diffraction peaks, which demonstrated that they were formed by the amorphous form of polymerization.…”

Section: Resultsmentioning

confidence: 99%

“…This appearance, however, was entirely changed due to the chemical insertion and attachments (e. g. acetylation reaction) of reacting species with the neat cellulose. A similar morphology changes have been reported by Liu et al who obtained same image of cellulose acetate during acetylation reaction of neat cellulose …”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Cellulose Derivatives from Industrial Towel Waste

et al. 2019

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The paper covers the synthesis and characterization of cellulose derivatives from waste cellulose, namely, towel wastes. For this purpose, the cellulose acetate derivatives were synthesized from towel waste by applying the conventional chemical synthesis process. To clarify the structure of synthesized materials, some spectroscopic methods (FT-IR, XRD, 1 H-NMR, 13 C-NMR) were used. Furthermore, thermal behavior and surface morphology of prepared materials were investigated by DTG-TG and SEM, respectively. It was found that the degree of substitution values decreased as the duration of hydrolysis increased in cellulose diacetate synthesis. It was also understood that cellulose diacetate was dissolved in acetone differently from cellulose triacetate. Degree of substitution values of cellulose diacetate were compared by using 1 H-NMR and titrimetric method. These helped elucidate the expected reaction. The proposed method was easy compared with the conventional method.

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A green route to prepare cellulose acetate particle from ramie fiber

Cited by 23 publications

References 9 publications

Preparation and Characterization of C₁₀–C₁₄Alkyl Cellulose Ester Sulfate Surfactant

Preparation and Characterization of C₁₀–C₁₄Alkyl Cellulose Ester Sulfate Surfactant

Grafting from ramie fiber with poly(MMA) or poly(MA) via reversible addition-fragmentation chain transfer polymerization

Synthesis and Characterization of Cellulose Derivatives from Industrial Towel Waste

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A green route to prepare cellulose acetate particle from ramie fiber

Cited by 23 publications

References 9 publications

Preparation and Characterization of C10–C14Alkyl Cellulose Ester Sulfate Surfactant

Preparation and Characterization of C10–C14Alkyl Cellulose Ester Sulfate Surfactant

Grafting from ramie fiber with poly(MMA) or poly(MA) via reversible addition-fragmentation chain transfer polymerization

Synthesis and Characterization of Cellulose Derivatives from Industrial Towel Waste

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Preparation and Characterization of C₁₀–C₁₄Alkyl Cellulose Ester Sulfate Surfactant

Preparation and Characterization of C₁₀–C₁₄Alkyl Cellulose Ester Sulfate Surfactant