Investigation of the rheological response of a bio-liquefied formaldehyde resin-based precursor for electrospinning

Zhang, Qiang; J, Lin; Dong, Yundan; Sun, Fengqiang

doi:10.1016/j.colsurfa.2023.130950

Cited by 13 publications

(6 citation statements)

References 24 publications

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“…It can be seen that the values of η 0 , η ∞ , and p show a direct correlation with increasing CTA concentration in the electrospinnable solutions as they gradually increased. These results are in agreement with those reported by the authors of [31,32], and especially with the work of Han et al [33], who emphasized the importance of studying the rheological properties of solutions to obtain defect-free fibers. To this end, they studied the tunable effects of ε-polysin in improving the electrospinning equipment and obtaining defect-free fibers for ultra-high molecular weight polyacrylamide by characterizing the properties of solutions and mats' electrospun morphologies.…”

Section: Physico-chemical Properties Of Cellulose Triacetate Solutionssupporting

confidence: 93%

Exploring Cellulose Triacetate Nanofibers as Sustainable Structuring Agent for Castor Oil: Formulation Design and Rheological Insights

Martín-Alfonso,

Rubio-Valle,

Estrada-Villegas

et al. 2024

Gels

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Developing gelled environmentally friendly dispersions in oil media is a hot topic for many applications. This study aimed to investigate the production of electrospun cellulose triacetate (CTA) nanofibers and to explore their potential application as a thickening agent for castor oil. The key factors in the electrospinning process, including the intrinsic properties of CTA solutions in methylene chloride (DCM)/ethanol (EtOH), such us the shear viscosity, surface tension, and electrical conductivity, were systematically studied. The impact of the CTA fiber concentration and the ratio of DCM/EtOH on the rheological properties of the gel-like dispersions in castor oil was then investigated. It was found that dispersions with a non-Newtonian response and above a critical concentration (5 wt.%), corresponding to approximately 2–2.5 times the entanglement concentration, are required to produce defect-free nanofibers. The average fiber diameter increased with CTA concentration. Further, the morphology and texture of the electrospun nanofibers are influenced by the ratio of solvents used. The rheological properties of dispersions are strongly influenced by the concentration and surface properties of nanofibers, such as their smooth or porous textures, which allow their modulation. Compared to other commonly used thickeners, such as synthetic polymers and metal soaps, CTA electrospun nanofibers have a much higher oil structuring capacity. This work illustrated the potential of using CTA nanofibers as the foundation for fabricating gel-like dispersions in oil media, and thus exerting hierarchical control of rheological properties through the use of a nanoscale fabrication technique.

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Section: Physico-chemical Properties Of Cellulose Triacetate Solutionssupporting

confidence: 93%

Exploring Cellulose Triacetate Nanofibers as Sustainable Structuring Agent for Castor Oil: Formulation Design and Rheological Insights

Martín-Alfonso,

Rubio-Valle,

Estrada-Villegas

et al. 2024

Gels

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“…The viscosity of a solution plays a crucial role in the determination of the spinnability of a solution during the electrospinning process 64 in exploring this phenomenon to understand how the preparation of the solution influences the spinnability of the resultant membrane. Previous research has indicated that certain biopolymers, like alginate, face challenges in electrospinning.…”

Section: Resultsmentioning

confidence: 99%

Development of hybrid electrospun alginate-pulverized moringa composites

Orisawayi,

Koziol,

Hao

et al. 2024

RSC Adv.

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“…In electrospinning, these interactions directly influence the chain elongation capacity, promoting the deformation of the polymer mass through Coulombic repulsive forces that affect the polymer solution, causing it to break into continuous jets that form fibers. Nonetheless, when these interactions are deficient, their intermolecular forces cannot maintain the stability of the Taylor cone during the electrospinning process 56 …”

Section: Resultsmentioning

confidence: 99%

“…Nonetheless, when these interactions are deficient, their intermolecular forces cannot maintain the stability of the Taylor cone during the electrospinning process. 56 Finally, to evaluate the interaction between viscosity, molar mass, and fiber morphology, spinning parameters were chosen based on the variable study conducted for fiber formation, as recorded in Table 2, using sample code 00.S3 (flow rate: 2.0 mL/h, voltage: 10 kV), with only the storage time varying from 0 to 14 days. Figure 5 shows the viscosity and molar mass at each time point taken for rheological analysis, and subsequently, 5 mL of the polymeric solution was electrospun for approximately 2 h. Finally, a portion of the obtained mats was characterized by GPC to assess molar mass and viscosity.…”

Section: Relationship Between Molar Mass and Morphology Of Fibrous St...mentioning

confidence: 99%

Evaluation of the polycaprolactone hydrolytic degradation in acid solvent and its influence on the electrospinning process

Anaya‐Mancipe,

de Figueiredo,

Rabello

et al. 2024

J of Applied Polymer Sci

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Polycaprolactone (PCL) is a pivotal biopolymer in biomedicine, especially in tissue engineering for scaffolds and biomaterials. Recognized for its effectiveness as a drug carrier with superior controlled release properties, PCL is commonly processed via electrospinning, typically employing chlorinated or fluorinated solvents known for cellular toxicity. As an environmentally conscious alternative, this study explores glacial acetic acid (AA) as a solvent for electrospinning solutions. Investigating PCL's molecular degradation through acid hydrolysis in acidic solvents (AA/formic acid) (FA), the study assesses the impact of storage time on resulting structures. Solutions containing 30% PCL in AA/FA (9:1) were stored at 35°C for up to 14 days, revealing a 50% molar mass reduction during solubilization through gel permeation chromatography, x‐ray diffraction, and Fourier‐transform infrared analyses. This reduction influenced chain packing, raising crystallinity indices from approximately 37% to 49% with prolonged storage. The reduced molar mass resulted in unstable Taylor cones, generating diverse mat morphologies. Intriguingly, this degradation enhanced water adsorption capacity, indicating exposed hydrogen bonds from acid hydrolysis as an advantageous trait for regenerative medicine. This underscores the hydrolyzed materials' potential for cell anchoring in tissue engineering.

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Investigation of the rheological response of a bio-liquefied formaldehyde resin-based precursor for electrospinning

Cited by 13 publications

References 24 publications

Exploring Cellulose Triacetate Nanofibers as Sustainable Structuring Agent for Castor Oil: Formulation Design and Rheological Insights

Exploring Cellulose Triacetate Nanofibers as Sustainable Structuring Agent for Castor Oil: Formulation Design and Rheological Insights

Development of hybrid electrospun alginate-pulverized moringa composites

Evaluation of the polycaprolactone hydrolytic degradation in acid solvent and its influence on the electrospinning process

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