Search
Use the search bar or filters below to find any TAPPI product or publication.
Filters
Content Type
Publications
Level of Knowledge
Committees
Event Type
Collections
Journal articles
Magazine articles
Investigation on the recycling of sulfuric acid from pretreatment of cellulose for nanocellulose preparation, TAPPI JOURNAL February 2020
ABSTRACT: Sulfuric acid is often used to pretreat cellulose prior to homogenization and conversion to nanocellulose. It would be economically significant to reuse the acid to close the overall value chain loop. The target of this work was to investigate the effect of recovery and recycling frequency of sulfuric acid from the pretreatments on the pretreatment yield of water-insoluble cellulose solid residue, and to explore the relationship between the nanocellulose size prepared by recovery of acid and number of cycles. The surface properties of the nanocelluloses were measured, including content of sulfate groups, absolute zeta potential, crystallinity, and thermal stability.
Journal articles
Magazine articles
On increasing wet-web strength with adhesive polymers, TAPPI JOURNAL February 2020
ABSTRACT: Fiber-fiber adhesion, called “bonding” in the old paper physics literature, is a critical component of the overall strength of dry paper. With freshly formed very wet pulp fiber webs, all evidence suggests there are no fiber-fiber crossings with significant adhesive joint strength. With water removal, a point will be reached where fiber-fiber adhesion starts to contribute to the overall wet-web strength.The literature reveals very few examples of polymers that increase fiber-fiber joint strength in freshly formed webs. Here, we summarize the literature and explain why it is so difficult to promote fiber-fiber wet adhesion with polymers. Nevertheless, ongoing research in areas as diverse as tissue engineering scaffolds and biomimetic adhesives gives clues to future developments. Advances in paper machine engineering have lessened the importance of wet-web strength. By contrast, a critical issue in many of the evolving nanocellulose technologies is the strength of objects first formed by aqueous processing, the green strength—the strength of wet bodies before drying. For exam-ple, 3-D printed nanocellulose objects and ultralow density cellulosic aerogels can be destroyed by capillary forces during drying. There is a need for adhesives that strengthen freshly formed, wet lignocellulosic joints.
Identification of Sheet Hole and Defects in Newsprint Mills, 1997 Newsprint Forum Proceedings
Identification of Sheet Hole and Defects in Newsprint Mills, 1997 Newsprint Forum Proceedings
Effect of Corona and Flame Treatments on Extrusion Coating P
Effect of Corona and Flame Treatments on Extrusion Coating Performance Properties, 1993 Polymers, Laminations & Coatings Conference Proceedings
Conference papers
Development and Use of An Improved Steady-State Model for Chlorine Dioxide Brightening that Considers Extraction Washer Carryover, 2015 PEERS Conference
Development and Use of An Improved Steady-State Model for Chlorine Dioxide Brightening that Considers Extraction Washer Carryover, 2015 PEERS Conference
Conference papers
An Update on Consistency Transmitter Measurement Technology
An Update on Consistency Transmitter Measurement Technology & Process Considerations, 2015 PEERS Conference
Conference papers
Materials Compatibility Issues With Biomass-Derived Oils , 2
Materials Compatibility Issues With Biomass-Derived Oils , 2015 PEERS Conference
Conference papers
Improving Recovery Boiler Availability through Understanding
Improving Recovery Boiler Availability through Understanding Fume Behavior, 2015 PEERS Conference
Conference papers
Chemical Additives to Optimize Black Liquor Recovery Through
Chemical Additives to Optimize Black Liquor Recovery Throughput and Increase Campaign Life, 2015 PEERS Conference
Conference papers
Commissioning brown stock washing controls for an evaporator
Commissioning brown stock washing controls for an evaporator limited mill, 2015 PEERS Conference