Počet záznamů: 1  

Influence of UV irradiation and subsequent chemical grafting on the surface properties of cellulose

  1. 1.
    0555933 - FGÚ 2023 RIV NL eng J - Článek v odborném periodiku
    Neubertová, V. - Kasálková-Slepičková, N. - Vokatá, B. - Bačáková, Lucie - Švorčík, V. - Kolská, Z.
    Influence of UV irradiation and subsequent chemical grafting on the surface properties of cellulose.
    Cellulose. Roč. 29, č. 3 (2022), s. 1405-1418. ISSN 0969-0239. E-ISSN 1572-882X
    Grant CEP: GA ČR(CZ) GA20-01641S; GA MZd(CZ) NU20-08-00208
    Výzkumná infrastruktura: NanoEnviCz II - 90124
    Institucionální podpora: RVO:67985823
    Klíčová slova: antibacterial activity * cellulose * chemical grafting * UV irradiation * wettability * zeta potential
    Obor OECD: Bioproducts (products that are manufactured using biological material as feedstock) biomaterials, bioplastics, biofuels, bioderived bulk and fine chemicals, bio-derived novel materials
    Impakt faktor: 5.044, rok: 2020
    https://doi.org/10.1007/s10570-022-04426-8

    This work is devoted to the study of surface properties of cellulose before and after a surface modification. Surface modification of polymeric materials was carried out in two steps: (1) activation by UV irradiation at 254 or 365 nm, followed by (2) chemical grafting with alanine, leucine or curcumin. Two types of cellulose materials, regenerated cellulose and cotton, were studied. The structure of cellulose at different stages of modification was examined by available physical and physico-chemical techniques and antibacterial activity of prepared composites was studied too. Antibacterial assays were performed on selected substrates. The results show that the changes in surface properties depend on the wavelength of UV irradiation as well as on the irradiation time. Smaller molecules of grafted substances (alanine and leucine) are bound not only onto the cellulose surface but also into the cellulose pores in contrast with curcumin. Cellulose substrates modified with alanine, leucine or curcumin show antibacterial activity, especially for S. epidermidis, also slightly against E. coli. The obtained results indicated the strongest antibacterial effect for cellulose grafted with curcumin, where CFU reduced by almost 58% for E. coli and 55% for S. epidermidis in comparison with pristine, alanine and leucine have only smaller effect.
    Trvalý link: http://hdl.handle.net/11104/0330492

     
     
Počet záznamů: 1