Lyocell blend fibers with cationic starch: potential and properties

Nechwatal, Axel; Michels, Christoph; Kosan, Birgit; Nicolai, Monika

doi:10.1023/b:cell.0000025379.34900.df

Cited by 9 publications

(5 citation statements)

References 5 publications

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“…8,9 Therefore, it is essential to find a common solvent for forming stable homogeneous starch or cellulose solutions to improve the processing efficiency for these polysaccharides. For hybridising cellulose and starch, considerable efforts have been devoted to exploring new solvent systems, such as N-methylmorpholine N-oxide monohydrate (NMMO), 10,11 aqueous NaOH solution 12,13 and ionic liquids. 1,14,15 Although these solvents have been successfully used for making composite films or gels, some of these solvents possess several undesired properties.…”

Section: Introductionmentioning

confidence: 99%

Solubility of starch and microcrystalline cellulose in 1-ethyl-3-methylimidazolium acetate ionic liquid and solution rheological properties

Tan

Chen

et al. 2016

Phys. Chem. Chem. Phys.

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This study compared the solubility of starch (G50) and microcrystalline cellulose (MCC) in an ionic liquid (IL), 1-ethyl-3-methylimidazolium acetate ([Emim][OAc]), at different temperatures. From SAXS and WAXS analysis, polysaccharides could be totally dissolved in [Emim][OAc]. Fourier-transform infrared (FTIR) spectra showed a similar dissolution mechanism for starch and MCC, which was related to the formation of hydrogen bonds between polysaccharide hydroxyls and acetic anions, causing the breakage of the hydrogen bonding network of the polysaccharide. The polysaccharide-[Emim][OAc] solutions displayed viscosity in the order of G50-[Emim][OAc] < G50/MCC-[Emim][OAc] < MCC-[Emim][OAc], which led to speculation that the molecular chain of G50 and MCC existed concordantly in [Emim][OAc]. The intrinsic viscosity study showed that G50 was much less temperature-sensitive than MCC, and G50/MCC solutions showed intermediate and tuned behaviors. Steady-shear measurements indicated that for dilute solutions, there was a slightly shear-thinning behavior at low shear rates, and high concentration solutions presented an apparent shear-thinning behavior at high shear rates. These characteristics also reflect the different conformation of polysaccharide chains in the solution, which guides the processing of polysaccharide materials and composites for the desired structure and properties.

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Section: Introductionmentioning

confidence: 99%

Solubility of starch and microcrystalline cellulose in 1-ethyl-3-methylimidazolium acetate ionic liquid and solution rheological properties

Tan

Chen

et al. 2016

Phys. Chem. Chem. Phys.

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“…Further understanding of the handling of starch in such solvent systems will enable preparation of cosolutions of starch and cellulose blends of known properties that could be used to develop new structures, , which may be important for textile, pharmaceutical, personal hygienic, cosmetic, and packaging industries by controlled regeneration/precipitation in suitable nonsolvents. , To develop such a process, it is necessary to develop a practical understanding of the behavior of starch in this solvent and to understand the swelling and solubility difference between different starch types, which in turn may provide further insight into starch granule structure and the mode of dissolution.…”

Section: Introductionmentioning

confidence: 99%

Solvent Effects on Starch Dissolution and Gelatinization

et al. 2011

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The disruption of starch granular structure during dissolution in varying concentrations of N-methyl morpholine N-oxide (NMMO) has been studied using three maize starches with varying ratios of amylose and amylopectin. Behavior in NMMO has been characterized by differential scanning calorimetry (DSC), microscopy, rapid viscosity analysis (RVA), and rheometry. Exothermic transitions were observed for the three starches in both 78 and 70% NMMO; the transition changed to an endotherm at 60 and 50% NMMO. Consistent with DSC, hot stage microscopy showed that starch granules dissolved at NMMO concentrations of 78 and 70%, whereas in 60 and 50% NMMO, gelatinization behavior similar to that found for starch in water was observed. Mechanical spectroscopy revealed the dominant viscous behavior (G″ > G') of starch at NMMO concentrations of 70 and 78% and more elastic behavior (G' > G″) at lower concentrations. Starch solutions in 78% NMMO obey the Cox-Merz rule, suggesting that the solutions are homogeneous on a molecular level.

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“…In addition, there are a significant number of open-pore structures inside the materials, and a large number of fibers are entangled between them. is is mainly due to a large amount of cationic starch adsorbed on the surface of the fiber, making it easier for the fibers to come in contact with each other [21,22]. e presence of cationic starch causes the fibers to bind more closely, forming a layered fiber microstructure and enhancing the stability of the fiber network structure.…”

Section: Measurements Of Porositymentioning

confidence: 99%

Effects of Porosity on the Static Compression of Foam Buffer Materials of Plant Fiber and Their Numerical Model

Huang

Zhang

Liu

2021

Shock and Vibration

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In recent years, researchers have investigated plant fiber foam buffer package materials for their environmental advantages, which include their ability to completely biodegrade and their rich raw materials. The porosity of buffer materials is an important factor that affects a plant’s static compression property. In this study, foam buffer package materials of plant fiber were developed using bleached bagasse pulp as the main raw material. A digital microscope was used to observe the porosity structures of the foam buffer materials, and the porosity was calculated via binary image processing using Matlab software. The effects of porosity on the static compression properties of cushion materials were discussed, and a numerical model was established. The results indicated that the threshold value chosen affected the calculation of the porosities of buffer materials, which in turn have significant effects on their specific static compression properties. The variation trend of the stress-strain curve fits the hyperbolic tangent function, according to which a numerical model was established. The results of this experiment were in accordance with the theoretical values, which will support the theoretical design of foam buffer package materials of plant fiber.

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Lyocell blend fibers with cationic starch: potential and properties

Cited by 9 publications

References 5 publications

Solubility of starch and microcrystalline cellulose in 1-ethyl-3-methylimidazolium acetate ionic liquid and solution rheological properties

Solubility of starch and microcrystalline cellulose in 1-ethyl-3-methylimidazolium acetate ionic liquid and solution rheological properties

Solvent Effects on Starch Dissolution and Gelatinization

Effects of Porosity on the Static Compression of Foam Buffer Materials of Plant Fiber and Their Numerical Model

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