Essays about: "cellulose nanofibrils"

Found 5 essays containing the words cellulose nanofibrils.

  1. 1. Investigation of graphene and nanocellulose hybrid films as a barrier material in packages

    University essay from Lunds universitet/Centrum för analys och syntes

    Author : Jens Bodelsson; [2019]
    Keywords : Nanocellulose; CNF; Graphene; Barrier; Dispersion; graphene nanosheets; coating; sonication; carboxymethylated; polymer technology; polymerteknologi; Technology and Engineering;

    Abstract : In this report, hybrid films of carboxymethylated cellulose nanofibrils (CNF) and graphene nanosheets (GNs) have been prepared to evaluate if the GNs can enhance the barrier properties of the CNF films. CNF already possess great barrier properties at low relative humidity (RH) but it is drastically lowered when the RH reaches above 50% due to its strong hydrophilicity of CNF. READ MORE

  2. 2. Preparation and characterization of nanocellulose-based carbon dioxide adsorbing aerogels

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Jiayuan Wei; [2017]
    Keywords : CO2 adsorption; freeze-casting; cellulose nanofibrils; acetylation; breakthrough;

    Abstract : CO2 adsorption is considered as a promising strategy to decrease the amount of CO2 in the atmosphere and stop global warming. The goal of this project is to prepare a cellulose-based CO2 adsorbent with a good mass transfer. Monolithic adsorbent based on cellulose nanofibrils (CNF) was fabricated via freeze-casting. 0. READ MORE

  3. 3. Dewatering Cellulose Nanofibril Suspensions through Centrifugation

    University essay from KTH/Skolan för kemivetenskap (CHE)

    Author : Jennifer Astorsdotter; [2017]
    Keywords : Cellulose nanofibrils; Microfibrilated cellulose; Centrifugation; Dewatering; Fiber suspension; Cellulosa nanofibriller; CNF; Microfibrilerad cellulosa; MFC; Centrifugering; Avvattning; Fibersuspension.;

    Abstract : Cellulose nanofibrils (CNF) is a renewable material with unique strength properties. A difficulty in CNF production is that CNF suspensions contain large amounts of water. If CNF suspension volume can be decreased by dewatering facilitated by centrifugation, then transportation costs and storage costs can be reduced. READ MORE

  4. 4. Towards stimuli-reformable paperboard and flipped classroom in chemistry education : A study of how to create a paper with controllable mechanical properties and a study in how the flipped classroom is used in chemistry education

    University essay from KTH/Skolan för teknikvetenskaplig kommunikation och lärande (ECE)

    Author : David Pettersson; [2017]
    Keywords : Alginate; Cationic cellulose nanofibrils; Cross-linking; Dialcohol cellulose;

    Abstract : Today, paper and paperboard is an important part of the packaging industry, as well as natural part of our daily lives. The alternatives to paper and paperboard is often produced from nonrenewable sources such as petroleum and as demands on sustainability increase in the packaging sector, it gives paper a desirable advantage over plastics. READ MORE

  5. 5. Rotational Diffusion of Cellulose Nanofibrils.

    University essay from KTH/Mekanik; KTH/Mekanik

    Author : Johan Wärnegård; William Hedén; [2014]
    Keywords : ;

    Abstract : Cellulose nanofibrils, CNF, is a technical term for the smallest crystalline constituentsof wood. Namely particles of cylindrical shape measuring 20-40 nm indiameter and 1-2 um in length. These fibrils display high ultimate tensile strengthand a Young's modulus comparable to Kevlar. READ MORE