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Journal articles
A bench scale aerated lagoon for studying the removal of chl
A bench scale aerated lagoon for studying the removal of chlorinated organics, TAPPI JOURNAL, April 1991, Vol. 74(4)
Journal articles
The effect of fillers on paper friction properties, TAPPI JOURNAL, April 1991, Vol. 74(4)
The effect of fillers on paper friction properties, TAPPI JOURNAL, April 1991, Vol. 74(4)
Journal articles
Vapor-phase chemimechanical pulping of aspen - explosion vs.
Vapor-phase chemimechanical pulping of aspen - explosion vs. no explosion, TAPPI JOURNAL, April 1991, Vol. 74(4)
Journal articles
Metered size presses: starch runnability and paper propertie
Metered size presses: starch runnability and paper properties, TAPPI JOURNAL, August 1991, Vol. 74(8)
Journal articles
A review of the technology and applications for microdenier
A review of the technology and applications for microdenier polyester, TAPPI JOURNAL, August 1991, Vol. 74(8)
Journal articles
Practical aspects of alkaline sizing: alkyl ketene dimer in mill furnishes, TAPPI JOURNAL, August 1991, Vol. 74(8)
Practical aspects of alkaline sizing: alkyl ketene dimer in mill furnishes, TAPPI JOURNAL, August 1991, Vol. 74(8)
Journal articles
Application of Information Theory to Characterize Print Quality, TAPPI JOURNAL, August 1991, Vol. 74(8)
Application of Information Theory to Characterize Print Quality, TAPPI JOURNAL, August 1991, Vol. 74(8)
Journal articles
Superabsorbent polymers and rewet performance of the interna
Superabsorbent polymers and rewet performance of the internal layers of absorbent disposable products, TAPPI JOURNAL, August 1991, Vol. 74(8)
Journal articles
Controllable conversion of cellulose nanocrystals to cellulose microspheres: Insight on the effect of parameters during spray drying, TAPPI Journal February 2025
ABSTRACT: Cellulose microspheres, which have mainly been produced via the sol-gel method up until now, exhibit a promising potential for broad applications due to their regular microstructure and renewability. However, some issues with production of cellulose microspheres, such as the recycling of involved organic solvents and the removal of the residual solvents, should be solved. In this study, a cellulose nanocrystals (CNCs) suspension was used to produce cellulose microspheres via spray drying in order to avoid the use of organic solvents. The effects of CNCs particle size, CNCs concentration, and inlet temperature of spray drying on microstructure and particle size of cellulose microspheres were investigated. The results indicated that the optimal average particle size and concentration of CNCs used for obtaining cellulose microspheres were 106 nm and 0.1 wt%, respectively. Under the optimal conditions, cellulose microspheres with a regular spherical morphology and an average particle size of ca. 3 ìm were obtained. The sulfuric acid hydrolysis and spray drying process barely affected the crystalline structure of cellulose. However, the introduced sulfhydryl groups, which were confirmed by Fourier transform infrared spectroscopy results, degraded the thermostability of cellulose. Generally speaking, converting CNCs to cellulose microspheres via spray drying is beneficial for promoting the controllable and continuous production of cellulose microspheres.
Journal articles
Data-efficient determination of machine-specific process windows in thermoforming using the example of PCR materials, TAPPI Journal July 2025
ABSTRACT: In an industrial context, process windows for thermoplastics in thermoforming processes are still often determined through time-consuming trial-and-error approaches. This results in increased effort when commissioning new machines, implementing new technologies, or substituting sheet materials. One key reason is the lack of methods that allow for efficient, process-related assessment of material behavior and a quantitative definition of a “target state” of the heated sheet in relation to geometry and process conditions. In this study, we present the In-Situ Thermoforming Characterization (ITC) method as an application-oriented approach that enables format-independent evaluation of material behavior directly within the forming station of a thermoforming system. The method was successfully applied to a material substitution case, replacing conventional virgin polypropylene (PP) with post-consumer recyclate (PCR) — in this case, recycled PP (rPP) — in the production of a defined cup geometry. The results enabled the transfer of existing process knowledge from the virgin material to the recyclate, thereby accelerating material qualification. Based on the collected data, material behavior under process conditions could be mapped within the design space, making it possible to identify machine settings that deliver equivalent forming results in our test setup. Overall, the method shows strong potential for efficient and precise determination of machine-specific process windows.