A5051003234- Advanced Cellulose Research Studies
- Material Properties and Processing
- Lignin and Wood Chemistry
- Additive Manufacturing and 3D Printing Technologies
- Textile materials and evaluations
- Viral gastroenteritis research and epidemiology
- Philosophy, Ethics, and Existentialism
- Polysaccharides and Plant Cell Walls
- Nanocomposite Films for Food Packaging
- 3D Printing in Biomedical Research
- Aerosol Filtration and Electrostatic Precipitation
- Escherichia coli research studies
- Materials Engineering and Processing
- Healthcare professionals’ stress and burnout
- Natural Fiber Reinforced Composites
- Hepatitis Viruses Studies and Epidemiology
- Probiotics and Fermented Foods
- Resilience and Mental Health
- Health, psychology, and well-being
- Infant Nutrition and Health
- Social and Educational Sciences
- Advanced machining processes and optimization
- Metallurgical Processes and Thermodynamics
- Biofuel production and bioconversion
- Wood Treatment and Properties
Karlstad University
2015-2025
KTH Royal Institute of Technology
2024
North Carolina State University
2024
BillerudKorsnäs (Sweden)
2019-2024
American University of the Middle East
2022
Södertörn University
2021
Abstract Hornification, a complex phenomenon occurring during drying of lignocellulosic materials because formation irreversible chemical bonds, remains subject scientific interest. This study aims to shed light on the underlying mechanisms hornification by investigating interactions between liquid and solid phases through solvent exchange treatment. The treatment involved replacing water with various solvents in suspensions never-dried cellulose samples, including alcohols (methanol,...
Most manufacturing processes for materials from cellulose-based deal with huge amounts of water, the interactions water within raw material (cellulose) both enable exciting properties as well limit rates production. In production tissue paper materials, content in pulp is high 99.8% when fed into machine, and almost all this must be removed efficiently fast. This work presents Novel, easy-to-use, numerical models predictions dewatering vacuum suction boxes through air drying (TAD) molding....
ABSTRACT Enterotoxigenic Escherichia coli (ETEC) is a leading cause of childhood and travelers’ diarrhea. The vaccine candidate ETVAX encompasses several ETEC colonization factors (CFs) with hybrid LT (heat-labile toxin)/cholera toxin B subunit adjuvanted double-mutant LT. Stool samples from Phase 2b trial were tested by PCR-based customized TaqMan Array Card (TAC), including three genes (LT heat-stable toxins, STh STp) 18 CFs. also the molecular platform Amplidiag culture, followed...
Understanding cellulose hornification provides crucial information regarding drying of pulp, paper, and other cellulosic materials as well recycling them. By measuring drainage, fiber width, water retention value hardwood softwood pulps before after sheet forming different procedures at achieved levels solids, the was evaluated. The also measured for when dried from acetone to observe what happens hydrogen bonds are not available in liquid phase. drainage width decreased with increasing...
Energy use, together with consumption of raw materials, machine clothing, and wet end chemicals, are some the most critical aspects in successful tissue making today. This work was aimed at developing a laboratory-scale method estimating dewatering mechanisms, vacuum efficiency, energy use Through Air Drying (TAD) tissue. When compared to pilot data, results new laboratory for investigating during TAD were same magnitude, around 24 26% dryness after dewatering, 27 29% molding. Sheet...
Hornification is a well-known phenomenon describing what happens during the drying of lignocellulosic materials, often within and between cellulosic pulp fibers. For wood fibers used in papermaking, this decreases fiber wall swelling, internal external fibrillation. It reduces flexibility damp fibers, which leads to diminished ability form effective networks, resulting lower paper strength. This work investigates how temperature affects changes morphology, connects sheet behavior, proposes...
The addition of nano- and micro-fibrillated cellulose to conventional softwood Kraft pulps can enhance the product performance by increasing strength properties enabling use less raw material for a given performance. However, dewatering is major problem when implementing these materials paper grades because their high water retention capacity. This study investigated how vacuum affected different types additives. hypothesis was that pulp additions behave differently during process like...
Enterotoxigenic Escherichia coli (ETEC) is an important cause of moderate to severe diarrhoea in children for which there no licensed vaccine. We evaluated ETVAX®, oral, inactivated ETEC vaccine containing four E. strains over-expressing the major colonization factors CFA/I, CS3, CS5, and CS6, a toxoid (LCTBA) double mutant heat-labile enterotoxin (dmLT) adjuvant safety, tolerability, immunogenicity. A double-blind, placebo-controlled, age-descending, dose-finding trial was undertaken 40...
Abstract This study delves into the dynamic evolution of solids content in a pilot-scale through air drying tissue machine, aiming to enhance comprehension and refine optimization strategies for manufacturing. It focuses on development throughout process. Analyzing interaction between process parameters provides deeper insights water removal dynamics. The research employs solid contents monitoring techniques pilot scale, offering detailed view from wet web’s inception final product....
Grease-proof paper is an energy-demanding product to manufacture, especially during refining and dewatering. Increases in energy efficiency either stage could result major savings. This article investigates the potential gains with addition of a stepwise progression vacuum suction box forming section production. For both lighter, 50 g/m2, heavier grade, 100 pulp-drainability 86 °SR, four steps would increased dryness, simultaneously decreased expenditure. The observed effects were higher for...
Increased energy efficiency is a major concern for all companies today. Not only does the cost follow but also environmental and sustainability aspects motivate more en ...
Abstract Screening of pulp can be expressed as a process where solid contaminants are removed from slurry without an excessive loss fibres acceptable quality. The impurities originate the feedstock, or they generated during transport, handling, storage, pulping process. most typical include bark, fibre bundles shives, knots, plastic, rubber, and sand. Moreover, there also other objectives for screening, such improvement quality, savings in bleaching chemical consumption, protection...
The addition of polyvinylamine (PVAm) in the wet-end papermaking process was investigated. changes pulp drainage, vacuum dewatering, tensile strength, and air permeance were measured with without PVAm. Both chemi-thermomechanical (CTMP) bleached kraft used. dewatering drainage abilities different pulps examined by measuring resistance (°SR), water retention value (g/g), dewatering. strength values tested on paper sheets. results showed that initial faster for PVAm, this effect greater CTMP...
Producing tissue paper is an energy-demanding process; a significant amount of energy expended when removing water by vacuum, mechanical pressing, and thermal drying. Because the most to remove in drying, making preceding step vacuum dewatering more efficient would benefit whole process. This article focuses on developing laboratory-scale method for verifying nature diminishing returns removal investigating efficiency strategies dewatering. The theoretical concept successive suction boxes...
The efficacy of an Oral Whole Cell ETEC Vaccine (OEV) against Travelers' Diarrhea (TD) was reexamined using novel outcome and immunologic measures. More specifically, a recently developed disease severity score alternative clinical endpoints were evaluated as part initial validation effort to access the vaccine intervention for first time in travelers endemic area. A randomized, double-blind, placebo-controlled trial followed Guatemala or Mexico up 28 days after arrival country following...
Dewatering and air flow in high vacuum suction boxes was examined. The work mainly numerical based on, compared with, previously published experimental results of dewatering from laboratory equipment a pilot paper machine. A model for wet pressing is used as the basis this work. aims study were to find new fitting parameters that allows previous be instead pressing, examine two extensions original model. indicate moisture can predict behavior several different data series both machine using...
Abstract Previous paper (Rahman et al. 2017) showed that the yield of softwood kraft pulp increased by addition either polysulfide or sodium borohydride because higher hemicellulose retention. An increase in content can make dewatering more difficult as WRV increases, but instead, an overall could improve a sheet certain weight will contain fewer fibres, giving open structure. It was therefore interest to measure properties low grammage handsheets (20 g/m 2 ) under conditions mimicking...
This investigation used numerical models to describe forming section sheet dewatering at the high vacuum suction boxes. Three different fabric structures were examined with for single-phase flow of air and two-phase water. was done evaluate how structure influences dewatering. The compared an experimental study same fabrics investigated on a laboratory box. small differences in rate could be simulated models, which confirmed validity models. implies that these can new they will respond...
The ability of cationized dialdehyde cellulose to improve the mechanical properties paper was evaluated. majority additives are synthesized by introducing cationic groups through chemical reactions. Here, were produced in a more environmentally friendly manner use non-toxic and readily biodegradable deep eutectic-like solvent mixtures (DESs). modified cellulose’s characterized FTIR, polarized-light optical microscopy, charge titrations, SEM/EDX. investigated as strength for papermaking....
State-of-the-art manufacturing of tissue paper by Through Air Drying provides excellent product performance, although at a high production cost and energy use. In this work, laboratory scale vacuum suction box was used to mimic the initial dewatering molding, together with pilot-scale trial. The purpose investigate both how corresponds pilot testing fabric design, basis weight, beating, fibers affect sheet caliper. This study reevaluates mechanisms during challenging previous hypothesis pure...