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TAPPI Nano Student Committee Coffee Break
Register Now Overview Speaker Virtual Webinar 12PM - 1PM (ET) Dr. Martin A. Hubbe Presentation Title: Why does nanocellulose sometimes seem antisocial? In this coffee break, I will present results
Webinars
Biomaterials and Bioethanol from Lignocelluloses
Biomaterials and Bioethanol from Lignocelluloses An industrial production of biomaterials and bioethanol from lignocelluloses such as corn cob and other cereal straws by a combination of hydrothermal
News
FPInnovation’s Trevor Stuthridge on bringing nanotech to market
As executive vice president at FPInnovations, Trevor Stuthridge oversees the organization’s research, business development, and strategy delivery. He is a board member for the Institute of Forest Biosciences, Innoventures Canada, and holds adjunct professorships at the University of British Columbia and University of Toronto. FPInnovations was created as Canada’s forest sector innovation hub in 2007 through the merger of three leading forest sector research institutes: FERIC, Forintek and Paprican.
News
Nanotech and the Forest-Based Bioeconomy
As a leader in scientific research and policy-making for the Canadian Forest Service, John Kozij has a keen interest in innovation, market growth, and sustainability for forest products. He serves as director general of the Policy, Economics and Industry Branch of the Canadian Forest Service, and holds a degree in economics from Simon Fraser University and a Masters in economics from Dalhousie University in Halifax.
News
Celluforce’s Sebastien Corbeil on commercializing nanotech
As president and CEO of CelluForce—the world leader in the development and production of cellulose nanocrystals (CNC)—Sebastien Corbeil has an expert perspective on commercializing nanotechnology in the pulp and paper industry. Corbeil has more than 20 years of international business experience; he holds an MBA from DePaul University and a M. Eng in Chemical Engineering from McGill University. CelluForce was founded in 2012 with the mission to commercialize cellulose nanocrystals; Corbeil joined in April, 2015. Current company shareholders are Domtar, FPInnovations, Schlumberger and Fibria.
Journal articles
Magazine articles
A novel predictive method for filler coflocculation with cellulose microfibrils, TAPPI Journal November 2019
ABSTRACT: Different strategies aimed at reducing the negative impact of fillers on paper strength have been the objective of many studies during the past few decades. Some new strategies have even been patented or commercialized, yet a complete study on the behavior of the filler flocs and their effect on retention, drainage, and formation has not been found in literature. This type of research on fillers is often limited by difficulties in simulating high levels of shear at laboratory scale similar to those at mill scale. To address this challenge, a combination of techniques was used to compare preflocculation (i.e., filler is flocculated before addition to the pulp) with coflocculation strategies (i.e., filler is mixed with a binder and flocculated before addition to the pulp). The effect on filler and fiber flocs size was studied in a pilot flow loop using focal beam reflectance measurement (FBRM) and image analysis. Flocs obtained with cationic polyacrylamide (CPAM) and benonite were shown to have similar shear resistance with both strategies, whereas cationic starch (CS) was clearly more advantageous when coflocculation strategy was used. The effect of flocculation strategy on drainage rate, STFI formation, ash retention, and standard strength properties was measured. Coflocculation of filler with CPAM plus bentonite or CS showed promising results and produced sheets with high strength but had a negative impact on wire dewatering, opening a door for further optimization.
Journal articles
Magazine articles
Understanding extensibility of paper: Role of fiber elongation and fiber bonding, TAPPI Journal March 2020
ABSTRACT: The tensile tests of individual bleached softwood kraft pulp fibers and sheets, as well as the micro-mechanical simulation of the fiber network, suggest that only a part of the elongation potential of individual fibers is utilized in the elongation of the sheet. The stress-strain curves of two actual individual pulp fibers and one mimicked classic stress-strain behavior of fiber were applied to a micromechanical simulation of random fiber networks. Both the experimental results and the micromechanical simulations indicated that fiber bonding has an important role not only in determining the strength but also the elongation of fiber networks. Additionally, the results indicate that the shape of the stress-strain curve of individual pulp fibers may have a significant influence on the shape of the stress-strain curve of a paper sheet. A large increase in elongation and strength of paper can be reached only by strengthening fiber-fiber bonding, as demonstrated by the experimental handsheets containing starch and cellulose microfibrils and by the micromechanical simulations. The key conclusion related to this investigation was that simulated uniform inter-fiber bond strength does not influence the shape of the stress-strain curve of the fiber network until the bonds fail, whereas the number of bonds has an influence on the activation of the fiber network and on the shape of the whole stress-strain curve.
Journal articles
Magazine articles
Effects of different ammonium lignosulfonate contents on the crystallization, rheological behaviors, and thermal and mechanical properties of ethylene propylene diene monomer/polypropylene/ammonium lignosulfonate composites, TAPPI Journal January 2020
ABSTRACT: Thermoplastic elastomer (TPE), made from ethylene propylene diene monomer (EPDM) and polypropylene (PP) based on reactive blending, has an excellent processing performance and characteristics and a wide range of applications. However, there are currently no reports in the literature regarding the usage of TPE in making composite boards. In this paper, EPDM, PP, and ammonium lignosulfonate (AL) were used as the raw materials, polyethylene wax was used as the plasticizer, and a dicumyl peroxide vulcanization system with dynamic vulcanization was used to make a new kind of composite material. This research studied the influences of the AL contents on the crystallization behaviors, rheological properties, thermal properties, and mechanical properties of the composites. The results showed that the AL content had a noticeable impact on the performance of the composite board. Accordingly, this kind of composite material can be used as an elastomer material for the core layer of laminated flooring.
Webinars
Insight into Lignin-Based Materials Webinar
Insight into Lignin-Based Materials Webinar Lignin has emerged as an important component for the valorization of plant biomass. Interesting approaches for upgrading lignin either by controlled
Webinars
Cellulose Nanocrystals in Cementitious Systems – Pilot and Commercial Scale
The addition of cellulose nanocrystals (CNC) to cementitious systems have made a number of improvements in fresh and hardened properties. Previous work has reported benefits including improved strength, viscosity and barrier properties.