Sökning: "Cellulose nanocrystals"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Cellulose nanocrystals.

  1. 1. Cellulose nanocrystals functionalized cellulose acetate electrospun membranes for adsorption and separation of nanosized particles

    Master-uppsats, Luleå tekniska universitet/Materialvetenskap

    Författare :José Ignacio Del Río De Vicente; [2021]
    Nyckelord :Electrospinning; Cellulose Nanocrystals; Filtration; Adsorption; Cellulose Acetate Fibers;

    Sammanfattning : Filtration and separation technologies remain as one of the biggest challenges humanity currently faces. The separation of different elements such as bacteria, viruses, heavy metals, particles, and chemical agents require the development of multifunctional membranes. LÄS MER

  3. 2. Formulation of nanoemulsions stabilized by cellulose nanocrystals

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Marco Maccagno; [2020]
    Nyckelord :nanocellulose; hydroxypropyl methilcellulose; Pickering emulsions; microfluidization; drug delivery; nanocellulosa; hydroxipropylmetylcellulosa; Pickering emulsioner; microfluidization; drogleverans;

    Sammanfattning : Cellulose nanocrystals (CNCs) are bio-based nanoparticles with the ability to stabilize oil and water emulsions thanks to their intermediate wettability and nanometric size. These and other types of particle-stabilized emulsions, commonly referred to as Pickering emulsions, are of great academic and industrial interest due to their superior stability against drop coalescence compared to classical surfactant-stabilized emulsions. LÄS MER

  4. 3. Evaluation of cellulose nanocrystal alignment in oriented electrospun fibers

    Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Bermet Kerim Kyzy; [2017]
    Nyckelord :Electrospinning; alignment; cellulose nanocrystals;

    Sammanfattning : Electrospinning is a fiber production method that has gained a special attention due to the simple setup and potential for the industry scale up to produce nanoregime polymer fibers. However, electrospun fibers have relatively poor mechanical properties, which could be improved by introducing reinforcing agents. LÄS MER

  5. 4. Production of regenerated nanocomposite fibers based on cellulose and their use in all-cellulose composites

    Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :Andrés García Vogel; [2017]
    Nyckelord :All-cellulose composites; regenerated cellulose nanocomposite fibers; halloysite nanotubes; cellulose nanocrystals; LiCl DMAc; bio based;

    Sammanfattning : Biobased all-cellulose composites (ACCs), in which the matrix and the reinforcement are made out of the same material, have gained a noticeable increased attention in recent years. Their successful application would solve the commonly faced challenges with natural fiber composites regarding their chemical antipathy between the hydrophilic fiber and the usually hydrophobic polymer matrix, while still keeping the advantages of being environmental friendly. LÄS MER

  7. 5. Nanoparticle loaded hydrogels as a pathway for enzyme controlled drug release in ophthalmic applications

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Nanoteknologi och funktionella material

    Författare :Michelle Åhlén; [2017]
    Nyckelord :nanoparticles; ophthalmic drug delivery; chitosan; polyacrylic acid; FITC;

    Sammanfattning : The aim of this study was to develop nanoparticle loaded hydrogel based contact lenses that could be used for ocular drug delivery. Two potential contact lens platforms for controlled ophthalmic drug delivery was thus developed by incorporating chitosan-poly(acrylic acid) nanoparticles into polyvinyl alcohol (PVA) hydrogels and nanoparticles together with cellulose nanocrystals (CNC) in PVA. LÄS MER