Vol.3, No 1, 2004 pp. 87 - 94
UDC 621.385.833 : 677.027.4
THE APPLICATION OF SCANNING ELECTRONIC
MICROSCOPY-THE STUDY OF THE SURFACE STRUCTURES OF THE UPPER LAYERS OF DYED
POLYESTER FIBRE SAMPLES IN THE OSTACET YELLOW E-L5R
Milena N. Miljković, Milovan M. Purenović, Aleksandra R. Zarubica
Faculty of Mathematics and Natural Sciences, Department of Chemistry,
University of Niš, 18000 Niš, Serbia and Montenegro
Abstract. Scanning electronic microscope JSM-5300 (JEOL, Japan)
has been used to investigate the structure of the PES fibres upper layers.
Preparation of samples was performed by placing them on an aluminium support,
with a glue or double-sided adhesive tape. The tool for spreading the conductive
layer on the sample' s surface, used in this work, was JFC-1100E ION SPUTTER
(JEOL Co., Japan). Potential difference of electron acceleration was 30
kV, and multiplication of the samples was 3500 times. ORWO NP 20 DIN films
were used for taking the photos. The samples were dyed with C.I.D. Yellow
23, in concentration of 1%, at pH = 4.5, with the following acids added:
acetic, formic and oxalic. The results show absence of any internal damage
in fiber structure. On the surface however, groups of particles have been
observed, varying in shape, magnitude and spacing density. Organic (acetic,
formic and oxalic) acids used in the experiments caused differences in
upper layers structures of dyed PES fibres. This is the main reason to
induce differences in colour (DE), chromaticity (DH) and lightness (DL),
among the samples (with the all acids included) and a standard (addition
of acetic acid only).
Key words: octacet yellow E-L5R, polyester fibre, scanning electronic
microscopy, surface structure, upper layers
PRIMENA SKENIRAJUĆE ELEKTRONSKE
MIKROSKOPIJE-PROUČAVANJE POVRŠINSKIH STRUKTURA GORNJIH SLOJEVA OBOJENIH
POLIESTARSKIH VLAKANA U BOJI OCTATET ŽUTOJ E-5LR
Skenirajući elektronski mikroskop JSM-5300 (JEOL, Japan) je korišćen za
ispitivanje strukture gornjih slojeva poliestarskih vlakana. Priprema uzoraka
je izvršena postavljanjem istih na osnovu od aluminijuma, pomoću lepka
ili obostrano lepljive trake. Sredstvo za širenje provodnog sloja na površini
uzorka, korišćeno u ovom radu je JFC-1100E ION SPUTTER (JEOL Co., Japan).
Razlika potencijala elektronske akceleracije bila je 30 kV, a uvećanje
uzoraka 3500 puta. ORWO NP 20 DIN filmovi su korišćeni za izradu fotografija.
Uzorci su obojeni žutom bojom C.I.D. Yellow 23, koncentracije 1%, pri pH
= 4.5 uz dodatak sledećih kiselina: acetatne, formijatne i oksalatne. Rezultati
pokazuju odsustvo bilo kojeg unutrašnjeg oštećenja u strukturi vlakna.
Medjutim, na površini su uočene grupe čestica, koje varijaju po obliku,
magnitudi i prostornoj zastupljenosti. Organske kiseline (acetatna, formijatna
i oksalna), koje su korišćene u eksperimentima, izazvale su razlike u gornjim
slojevima struktura obojenih poliestarskih vlakana. Ovo je glavni razlog
za indukciju razlika u boji (DE), hromatičnosti (DH) i svetline (DL), izmedju
uzoraka (uključujući sve dodate kiseline) i standarda (gde je dodata samo
acetatna kiselina).
