Different rheological behaviours of cellulose/tetrabutylammonium acetate/dimethyl sulfoxide/water mixtures

Zhang, Lei; Jiang, Zeming; Yang, Shujuan; Zeng, Zhinong; Zhang, Wentao; Zhang, Liping

doi:10.1007/s10570-020-03363-8

Cited by 9 publications

(6 citation statements)

References 62 publications

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“…The τ–γ̇ curves and lg τ–lg γ̇ curves of spinning solutions with different glucose contents are shown in Figure S6. The higher the degrees of deviation between n and 1 are, the stronger the non-Newtonian property of the solution . When n > 1, the structure of the spinning solution is weakened; when n < 1, the structure is continuously strengthened; only when n = 1, it is in line with Newtonian fluid, and the solution structure does not change during flow, so the processing of polymers including fibers can be carried out easily .…”

Section: Resultsmentioning

confidence: 99%

“…The higher the degrees of deviation between n and 1 are, the stronger the non-Newtonian property of the solution. 25 When n > 1, the structure of the spinning solution is weakened; when n < 1, the structure is continuously strengthened; only when n = 1, it is in line with Newtonian fluid, and the solution structure does not change during flow, so the processing of polymers including fibers can be carried out easily. 26 The n of the cellulose solutions with various glucose concentrations at 40 °C is exhibited in Figure 1b.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Effects of Glucose and Coagulant on the Structure and Properties of Regenerated Cellulose Fibers

et al. 2023

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Regenerated cellulose fiber (RCF) is an environmentally friendly material with outstanding mechanical properties and recyclability, which has been used in a large number of applications. However, during the spinning process using ionic liquids (ILs) as solvents, the dissolved cellulose continues to degrade and even produces degradation products such as glucose, which can enter the recycled solvent and coagulation bath. The presence of glucose can seriously affect the performance of the produced RCFs and hinder their applications, so it has become critical to clarify the regulation and mechanism of this process. In this study, 1-ethyl-3-methylimidazolium diethyl phosphate ([Emim]DEP) with different glucose contents was selected to dissolve wood pulp cellulose (WPC) and obtained RCFs in different coagulation baths. The effect of glucose content in spinning solution on fiber spinnability was investigated by rheological analysis, and the influence of coagulation bath composition and glucose content on the morphological characteristics and mechanical properties of the RCFs was also studied in depth. The results indicated that the morphology, crystallinity, and orientation factor of RCFs were influenced by the presence of glucose in the spinning solution or coagulation bath, resulting in corresponding changes in mechanical properties, which can provide practical reference and guidance for the industrial production of new type fiber.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Effects of Glucose and Coagulant on the Structure and Properties of Regenerated Cellulose Fibers

et al. 2023

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“…Due to its high fraction of intra- and intermolecular hydrogen bonding, cellulose is hard to treat in solution or as a melt. The solvent quaternary ammonium ionic liquids (ILs) that were developed in the present authors’ laboratory can dissolve cellulose at low temperatures; a series of regenerated cellulose functional fibers have exhibited good properties in previous reports [ 18 , 19 ]. Using blend modification and adding additional fillers enhances the performance of the RC film, rendering the film more widely useful.…”

Section: Introductionmentioning

confidence: 88%

“…To eliminate moisture, the cellulose pulp was dried at 60 °C for 12 h. The nano-SiO 2 was mixed with the laboratory-made IL in a round-bottomed flask and sonicated for 1 h to obtain a homogeneous mixture [ 18 ]. Then, the cellulose pulp was added to the nano-SiO 2 /IL solution via mechanical stirring at 55 °C for 4 h, in order to prepare the nano-SiO 2 /cellulose solutions with a cellulose concentration of 8% and nano-SiO 2 contents of 0, 2, 4, 6, 8, and 10 wt% of cellulose content.…”

Section: Methodsmentioning

confidence: 99%

Surface Engineering of Regenerated Cellulose Nanocomposite Films with High Strength, Ultraviolet Resistance, and a Hydrophobic Surface

et al. 2023

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Regenerated cellulose packaging materials can alleviate the environmental pollution and carbon emissions caused by conventional plastics and other chemicals. They require regenerated cellulose films with good barrier properties, such as strong water resistance. Herein, using an environmentally friendly solvent at room temperature, a straightforward procedure for synthesizing these regenerated cellulose (RC) films, with excellent barrier properties and doping with nano-SiO2, is presented. After the surface silanization modification, the obtained nanocomposite films exhibited a hydrophobic surface (HRC), in which the nano-SiO2 provided a high mechanical strength, whereas octadecyltrichlorosilane (OTS) provided hydrophobic long-chain alkanes. The contents of the nano-SiO2 and the concentrations of the OTS/n-hexane in regenerated cellulose composite films are crucial, as they define its morphological structure, tensile strength, UV-shielding ability, and the other performance of these composite films. When the nano-SiO2 content was 6%, the tensile stress of the composite film (RC6) increased by 41.2%, the maximum tensile stress was 77.22 MPa, and the strain-at-break was 14%. Meanwhile, the HRC films had more superior multifunctional integrations of tensile strength (73.91 MPa), hydrophobicity (HRC WCA = 143.8°), UV resistance (>95%), and oxygen barrier properties (5.41 × 10−11 mL·cm/m2·s·Pa) than the previously reported regenerated cellulose films in packaging materials. Moreover, the modified regenerated cellulose films could biodegrade entirely in soil. These results provide an experimental basis for preparing regenerated-cellulose-based nanocomposite films that exhibit a high performance in packaging applications.

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“…23 Currently, some solvents were utilized in the cellulose dissolution process, such as ionic liquids, 24 N-methylmorpholine-N-oxide (NMMO), 25 and lithium chloride-dimethylacetamide. 26 These methods commonly suffer from high cost, recycling difficulties, or environmental pollution, while the low-temperature alkali solvent system makes it difficult to dissolve cellulose with high molecular weight and high crystallinity. 27 Thus, the search for alternative green solvents is still a hot spot and a difficult area for cellulose development.…”

Section: ■ Introductionmentioning

confidence: 99%

Bioinspired Thermochromic Textile Based on Robust Cellulose Aerogel Fiber for Self-Adaptive Thermal Management and Dynamic Labels

Jiang,

Yan,

Cui

et al. 2023

ACS Appl. Mater. Interfaces

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Aerogel fiber has emerged recently for incorporation in personal thermal management textiles due to its flexibility, scalability, and ultrahigh porosity, which allows the body to keep warm via thermal isolation without energy consumption. However, the functionalization and intellectualization of cellulose-based aerogel fibers have not yet been fully developed. Herein, we propose a biomimicking design inspired by polar bear and Siamese cat hair that combines porous cellulose aerogel fiber (CAF) with reversible thermochromic microcapsules to mimic biological sensory and adaptive thermoregulation functions. The produced CAF has a controllable pore structure, a large specific surface area (230 m 2 /g), and excellent mechanical strength (∼15 MPa). Low-temperature darkening microcapsules have been incorporated into the robust CAF to spontaneously adjust color by perceiving the ambient temperature. The functional aerogel fiber fabric achieves high thermal insulation and photothermal modulation simultaneously at temperatures below 18 °C. The temperature of the thermochromic fabric was higher by 6 °C than that of the sample without the microcapsules at a light intensity of 0.2 W/cm 2 . In addition, the aerogel fibers mixed with two types of thermochromic microcapsules exhibit three color switches with fast response, a color-control precision of 0.2 °C, and good cycling performance. This smart aerogel fibers hold great promise for self-adaptive thermal management, temperature indication, information transfer, and anticounterfeiting in textiles.

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Different rheological behaviours of cellulose/tetrabutylammonium acetate/dimethyl sulfoxide/water mixtures

Cited by 9 publications

References 62 publications

Effects of Glucose and Coagulant on the Structure and Properties of Regenerated Cellulose Fibers

Effects of Glucose and Coagulant on the Structure and Properties of Regenerated Cellulose Fibers

Surface Engineering of Regenerated Cellulose Nanocomposite Films with High Strength, Ultraviolet Resistance, and a Hydrophobic Surface

Bioinspired Thermochromic Textile Based on Robust Cellulose Aerogel Fiber for Self-Adaptive Thermal Management and Dynamic Labels

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