Sökning: "tempo-oxidation"

Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet tempo-oxidation.

  1. 1. Absorbent Materials from Kraft Pulp

    Författare :Fredrik Wernersson Brodin; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MFC; retention; foam; TEMPO oxidation.; absorption; Absorbent;

    Sammanfattning : Superabsorbent polymers (SAP) have, since being introduced in the 1980s, become an important constituent in hygiene products, such as disposable diapers. The design of disposable diapers has changed over the years and today thinner products can be produced partly because of the excellent absorption and retention properties of the petrochemical-based SAP. LÄS MER

  3. 2. The effect of wood properties on oxidative isolation of cellulose nanofibrils and characterization of networks

    Författare :Simon Jonasson; Kristiina Oksman; Lars Wågberg; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cellulose nanofibrils; wood; TEMPO-oxidation; nanofibril network; lignin; tension wood; transgenic tree; Trä och bionanokompositer; Wood and Bionanocomposites;

    Sammanfattning : Wood is a natural resource that has been an integral part of society for as long as humans have been on Earth. From serving as fuel for fire and construction material the applications of wood has been developed in modern times and only surged as a consequence of societal strive for sustainability and usage of green resources. LÄS MER

  4. 3. Chemical Modification of Cellulose Fibres and Fibrils for Design of New Materials

    Författare :Verónica López Durán; Lars Wågberg; Per A. Larsson; Akira Isogai; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; borohydride reduction; cellulose-based materials; chemical modification; chlorite oxidation; fibres; fibrils; periodate oxidation; TEMPO oxidation; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : Due to the growing interest in biobased materials in today’s society, where the need for a cyclic economy is obvious, there has been a huge increase in the  interest for using cellulose due to its excellent mechanical and chemical properties. However, the properties of cellulose have to be modified and improved in order to satisfy advanced material applications where the cellulose properties can be tuned to fit the properties of other components in composite mixtures. LÄS MER

  5. 4. Oxidized Cladophora nanocellulose derivatives : Functionalization towards biocompatible materials

    Författare :Igor Rocha; Jonas Lindh; Natalia Ferraz; Albert Mihranyan; Maria Strömme; Eva Malmström Jonsson; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cladophora nanocellulose; TEMPO oxidation; periodate oxidation; sulfonation; cellulose beads; surface properties; biomaterials; cell studies; hemocompatibility;

    Sammanfattning : Nanocellulose is a promising candidate for biomedical applications because of its enhanced mechanical properties, increased surface area and greater porosity compared to bulk cellulose.This thesis investigates the functionalization of Cladophora nanocellulose and evaluates the influence of these modifications on physicochemical properties and biocompatibility of the material. LÄS MER

  7. 5. Chemoenzymatic synthesis of anionic alkyl glycosides

    Författare :NGOC NGO; Bioteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Alkyl glycosides; laccase; TEMPO; oxidation; cyclodextrin glucanotransferases;

    Sammanfattning : Growing concerns for environmental issues and product safety for users have shifted research interests towards the use of renewable resources and climate-neutral processes. The enzymatic approach having high selectivity under mild reaction conditions is promising, and the nature-originating products are well accepted. LÄS MER