Author(s):
1. Branka Ružičić, University of Banja Luka, Faculty of Technology, Republic of Srpska, Bosnia and Herzegovina
2. Dragana Grujić, Faculty of Technology Banja Luka, Republic of Srpska, Bosnia and Herzegovina
3. Blanka Škipina, Faculty of Technology Banja Luka, Republic of Srpska, Bosnia and Herzegovina
4. Biljana Pećanin, Univerzitet u Banjoj Luci, Tehnološki fakultet, Republic of Srpska, Bosnia and Herzegovina
5. Ana Velemir, Faculty of Technology, University of Banja Luka, Republic of Srpska, Bosnia and Herzegovina
6. Slavica Maletić, Univerzitet u Beogradu, Fizički fakultet, Studentski trg 12, Beograd, Serbia
7. Sandra Dedijer, Fakultet tehničkih nauka Univerziteta u Novom Sadu, Serbia

Abstract:
In this study, the spectrophotometric characteristics of samples screen-printed with alginate paste (CHT-NV) and modified bentonites on non-woven textiles were examined. Sodium bentonite was modified with CuSO4·5H2O and ZnSO4·7H2O in different percentages. An alcoholic extract of Picea omorika (conc. 100 mg/mL) was added to all printing pastes. Color coordinates and spectral reflectance curves in the visible region were measured. The color difference (ΔE) and color strength (K/S) were analyzed. The sample with added sodium bentonite showed an unnoticable color difference compared to the sample printed with the extract alone. However, this difference became noticeable with the addition of further modified bentonites in the paste. When sodium bentonite modified with ZnSO4·7H2O was used, an increase in ZnSO4·7H2O percentage resulted in a linear decrease in color difference. The most intense coloring was observed in the sample with bentonite modified with copper ions and the lowest percentage of zinc ions. As the percentage of zinc ions increased, the color intensity decreased. Consequently, the sample with sodium bentonite modified only with ZnSO4·7H2O showed the smallest K/S value.

Key words:
Bentonite, plant extracts, spectrophotometric characteristics, color strenght, printed textiles, nonwoven textile,Bentonite,plant extracts,spectrophotometric characteristics,color strenght,printed textiles,nonwoven textile

Thematic field:
SYMPOSIUM B - Biomaterials and nanomedicine

Date of abstract submission:
29.06.2024.

Conference:
Contemporary Materials 2024 - Savremeni Materijali

Applied paper from author