The effect of drying method on the porosity of regenerated cellulose fibres

Zeng, Beini; Byrne, Nolene

doi:10.1007/s10570-021-04068-2

Cited by 6 publications

(3 citation statements)

References 41 publications

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“…The resultant hydrogels were then subjected to a freeze-drying process at temperatures below − 20℃ for three days, aimed at removing moisture and forming a consistent porous structure. This careful freezedrying process was crucial to prevent pore collapse due to tension, ensuring the material maintained uniform porosity (Mao et al 2008;Zeng et al 2021).…”

Section: Preparation Of Cellulose/fa Porous Materials (C2-fx)mentioning

confidence: 99%

Fly-Ash based Flame-Retardant Cellulose Materials for Strengthening and Value-Added Utilization in Industrial Solid Wastes

He,

Tan,

et al. 2024

Preprint

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Cellulose, a bio-based material, is increasingly researched and valued for its abundant availability and exceptional characteristics. However, Cellulose has a flammable problem. This study addresses this issue by integrating it with industrial waste fly ash (FA) to overcome its natural flammability. By solution compounding, the study successfully developed cellulose/FA films and porous structures, significantly boosting the material's flame-retardant capabilities. This innovation not only enhances the practical application of cellulose but also promotes the high-value reuse of FA, resonating with the principles of sustainable development. The cellulose/FA hydrogel, characterized by a homogeneous and stable blend of FA particles and cellulose, achieves this through effective affinity and hydrogen bonding, ensuring optimal miscibility and encapsulation. In terms of thermal properties, the modified composites (C-F10, C-F20 and C-F30) demonstrate a substantial increase in initial decomposition temperatures, approximately 26℃ higher than pure cellulose, ranging between 282℃ and 302℃. This enhancement is attributed to the formation of an inorganic protective layer on the cellulose matrix, which significantly improves thermal stability while maintaining key mechanical properties. Remarkably, the flame retardancy of these materials shows notable improvement, particularly at a 30wt% FA concentration, with the limiting oxygen index (LOI) of the porous and film structures reaching around 29% and 31%, respectively. This advancement greatly elevates their flame resistance. Overall, this study presents a pioneering approach in developing eco-friendly, flame-retardant materials by repurposing industrial waste, marking a significant stride in sustainable material innovation.

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Section: Preparation Of Cellulose/fa Porous Materials (C2-fx)mentioning

confidence: 99%

Fly-Ash based Flame-Retardant Cellulose Materials for Strengthening and Value-Added Utilization in Industrial Solid Wastes

He,

Tan,

et al. 2024

Preprint

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“…Natural biopolymers such as starch, cellulose, and chitosan are favorable materials for the fabrication of controlled release carriers [2,[6][7][8][9][10] as they are renewable, cost-effective, low toxic, and abundantly available. Cellulose as the most abundantly available polysaccharide on earth has been extensively studied for fabrication of the microspheres, nanoparticles, lms and hydrogels for food and non-food applications [11][12][13][14][15][16][17][18][19]. Spray-dried cellulose microparticles were studied as a vehicle to slow release and enhanced the utilization e ciency of fertilizers [17].…”

Section: Introductionmentioning

confidence: 99%

Cellulose Microspheres As Promising Sustainable Controlled Release Carriers for Fertilizers

Balang

Tay

Chin

et al. 2023

Preprint

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Background: Cellulose fibers extracted from printed paper wastes are utilized to synthesize spherical cellulose microspheres via water-in-oil microemulsion and precipitation methods. Span 80 was used as a surfactant and acetic acid as a precipitating agent in the microemulsion and precipitation process to obtain cellulose microspheres. The effects of synthesis conditions such as cellulose concentrations and drying techniques were observed to have profound effects on the surface morphology, particle sizes, and surface area of cellulose microspheres produced. Results: Spherical cellulose microspheres with particle sizes ranging from 5.2 to 9.3 µm were synthesized. Increasing cellulose concentrations led to larger particle sizes. Among various kinds of drying techniques, freeze-drying is the most preferable method for obtaining better yields of cellulose microspheres. The potential applications of the synthesized cellulose microspheres as controlled-release carriers for fertilizer in various soil types were evaluated. The larger particle sizes of cellulose microspheres have a smaller specific surface area, but with higher loading capacities and slower urea release. Conclusions: Our studies showed that the loading capacity and release profiles of urea could be tailored by modulating the mean particle sizes of the cellulose microspheres. Hence, cellulose microspheres demonstrated great potential to be utilized as sustainable controlled-release carriers for fertilizer.

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“…Natural biopolymers such as starch, cellulose, and chitosan are favorable materials for the fabrication of controlled release carriers [4,[7][8][9][10][11] as they are renewable, cost-effective, low toxic, and abundantly available. Cellulose as the most abundantly available polysaccharide on earth has been extensively studied for fabrication of the microspheres, nanoparticles, lms and hydrogels for food and non-food applications [12][13][14][15][16][17][18][19][20]. Spray-dried cellulose microparticles were studied as a vehicle to slow release and enhanced the utilization e ciency of fertilizers [18].…”

Section: Introductionmentioning

confidence: 99%

Cellulose Microspheres as Controlled Release Carriers for Fertilizer

Balang

Tay

Chin

et al. 2022

Preprint

View full text Add to dashboard Cite

Background Cellulose fibers extracted from printed paper wastes are utilized to synthesize spherical cellulose microspheres via water-in-oil microemulsion and precipitation methods. Span 80 was used as a surfactant and acetic acid as a precipitating agent in the microemulsion and precipitation process to obtain cellulose microspheres. The effects of synthesis conditions such as cellulose concentrations and drying techniques were observed to have profound effects on the surface morphology, particle sizes, and surface area of cellulose microspheres produced. Results Spherical cellulose microspheres with particle sizes ranging from 5.2 to 9.3 µm were synthesized. Increasing cellulose concentrations led to larger particle sizes. Among various kinds of drying techniques, freeze-drying is the most preferable method in obtaining better yields and yet, larger cellulose microspheres. The potential applications of the synthesized cellulose microspheres as controlled-release carriers for fertilizer in various soil types were evaluated. The larger size of cellulose microspheres have a smaller specific surface area, but with higher loading capacities and slower urea release. Conclusions Our studies showed that the loading capacity and release profiles of urea could be tailored by modulating the mean particle sizes of the cellulose microspheres. Hence, cellulose microspheres have the potential to be utilized as fertilizer-controlled release carriers.

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The effect of drying method on the porosity of regenerated cellulose fibres

Cited by 6 publications

References 41 publications

Fly-Ash based Flame-Retardant Cellulose Materials for Strengthening and Value-Added Utilization in Industrial Solid Wastes

Fly-Ash based Flame-Retardant Cellulose Materials for Strengthening and Value-Added Utilization in Industrial Solid Wastes

Cellulose Microspheres As Promising Sustainable Controlled Release Carriers for Fertilizers

Cellulose Microspheres as Controlled Release Carriers for Fertilizer

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