We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Revealing pore size distribution in cellulose and lignin-cellulose man-made fibers – effect of draw ratio and lignin content
Summary
Researchers investigated pore size distribution in cellulose and lignin-cellulose man-made fibers using thermoporosimetry in the wet state and nitrogen sorption after critical-point drying, addressing the challenge that conventional pore analysis methods require dry samples but cellulose pores collapse irreversibly upon drying. Results characterized how lignin content and draw ratio during spinning influence pore structure, with implications for fiber performance and microplastic fiber shedding during use.
Abstract There are limited methods available for measurement of the porosity of cellulose fibers, even more so for obtaining a pore size distribution. Conventional pore analysis methods require dry samples, with intact pores. However, pores in cellulose fibers collapse when dried from water and thus present a challenge for sample analysis. Furthermore, the pore collapse is partially irreversible (hornification) which should be accounted for in the analysis. In this study, analysis of pore structure was carried out in the wet state with thermoporosimetry and also for critical point dried samples, analyzed with N2 sorption. This study determines the effect of fiber lignin content and certain spinning parameters on the pore size distribution of spun fibers before and after drying. It could also be concluded that solvent exchange, drying from a non-polar solvent will result in an altered pore size distribution, with a total pore volume greater than if dried from water, however not representative of the never-dried state. It is concluded that thermoporosimetry together with the water retention value (WRV) measurement is a powerful combination to acquire insights to the pore size distribution of spun fiber.
Sign in to start a discussion.
More Papers Like This
Revealing pore size distribution in cellulose and lignin-cellulose man-made fibers – effect of draw ratio and lignin content
Researchers measured the pore structure of cellulose and lignin-cellulose fibers using thermoporometry (a technique that uses freezing point changes to detect tiny pores) and found that drying the fibers causes partial, irreversible pore collapse that changes their internal architecture. The findings have implications for designing cellulose-based materials — a biodegradable alternative to synthetic plastics — where controlling pore structure determines performance.
Wet-Spun Composite Filaments from Lignocellulose Nanofibrils/Alginate and Their Physico-Mechanical Properties
Researchers developed composite fibers from lignocellulose nanofibrils and alginate, examining how varying lignin content affects the fibers' properties and biodegradability. These bio-based materials represent a sustainable alternative to synthetic plastic fibers, which contribute to microplastic pollution through textile washing and degradation.
Spinneret geometry modulates the mechanical properties of man-made cellulose fibers
Researchers found that changing the geometry of the nozzle (spinneret) used to spin cellulose fibers significantly improved the toughness of the resulting textile fibers. Tougher natural fibers are important for making longer-lasting textiles, which reduces the rate at which synthetic garments are replaced and the associated shedding of plastic microfibers during washing. This research supports sustainable textile development as a microplastic reduction strategy.
Drying of the Natural Fibers as A Solvent-Free Way to Improve the Cellulose-Filled Polymer Composite Performance
This materials science paper describes how thermal drying of cellulose fibers improves their performance as fillers in polymer composites. Developing stronger plant-fiber composites is part of the broader effort to create biodegradable plastic alternatives that do not generate persistent microplastic pollution.
Textile Fiber Pollution:Relating Textile Featuresto Fiber Release in Pilling Experiments
Researchers evaluated the contribution of physical, dynamic, and thermomechanical textile properties to microfiber release susceptibility in pilling experiments, finding that fiber nature, dimensional features, and mechanical properties collectively determine a textile's propensity to shed microplastic fibers.