Effect of dyeing parameters on dyeing of cotton fabrics with fluoro chloro pyrimidene reactive dyes

IJRET: International Journal of Research in Engineering and Technology eISSN: 2319-1163 | pISSN: 2321-7308
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Volume: 03 Issue: 04 | Apr-2014, Available @ http://www.ijret.org 125
EFFECT OF DYEING PARAMETERS ON DYEING OF COTTON
FABRICS WITH FLUORO CHLORO PYRIMIDENE REACTIVE DYES
Abu Naser Md. Ahsanul Haque
Lecturer, Department of Textile Engineering, BGMEA University of Fashion & Technology, Dhaka, Bangladesh
Abstract
Effects of electrolyte, alkali, liquor ratio and temperature were observed on dyeing of cotton fabric with Fluoro Chloro Pyrimidene
(FCP) Dyes. For this experiment single joursey knitted fabrics were taken. The selected dyestuffs were Drimarene Yellow K2R (DYK),
Drimarene Red K8B (DRK) and Drimarene Blue K2RL (DBK). 1% on the weight of fabric (owf) of each dye was considered for
producing 9 combined shades on 9 fabric samples. Isothermal exhaust method was followed for dyeing. To observe the effect of a
particular parameter, that one was varied while other parameters kept constant. The dyed samples were tested in a reflectance
spectrophotometer (datacolor 650) to get the CIELAB coordinates (L*, a* and b*). The color values (K/S) of the samples were
calculated by Kubelka-Munk equation and from that value the strength% were determined. The results show that DRK and DBK were
positively influenced by the increase of electrolyte and temperature though DYK was negatively influenced. All over depth of shade
was increasing with the increase of electrolyte, alkali and temperature and 1:20 liquor ratio was found more suitable than 1:10 and
1:30.
Keywords: Electrolyte, Alkali, Shade, Liquor ratio, Temperature.
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1. INTRODUCTION
Bi-functional reactive dyes are known for better exhaustion
and fixation properties as they have higher probability to be
attracted to the fiber due to double reactive group. They also
double their chance to react with fiber and stay in it as an
integral part. FCP dyes contain two different halogen groups-
fluorine and chlorine. Among the halogens from fluorine to
iodine, the chlorine group is favored commercially as its
reactivity is moderate among those four. Fluoride group has
least reactivity as its bond energy is far higher than chloride
(F=102 kcal/g, Cl= 77 kcal/g) [6]. But in combination of
those, a highly reactive dye can be obtained which reactivity
lies between MFT and DCT dyes [7].
Dyeing of reactive dyes depends upon different parameters
like electrolyte, alkali, liquor ratio and temperature. Generally
exhaustion of a reactive dye depends upon electrolyte
concentration and reactivity of a dye increases with alkali and
dyeing temperature. A highly reactive dye has higher
probability to react with fiber but also possess strong chances
to get hydrolyzed. That is why the behavior of any dyestuff in
different parameters should be studied for getting the optimum
results from the process.
Several researchers worked on the influence of dyeing
parameters on dyeing with reactive dye. Miljkovic, N. M. et al
[1] studied on the effect of dyeing parameter on dyeing with
vinyl sulphone dyes. They measured the CIELAB coordinates
of the dyed samples and in conclusion suggested that
shortening of dyeing time with a reduction of salt can give a
better output. On the other hand Saeed, Q. et al [2] worked
with four monoazo reactive dyes and observed their effect in
different parameters. Exhaustion percentages were found in a
range of 65%-85% for those monoazo dyes and they also had
good fastness properties.
Another researcher Arzu, H. F. M. et. al [5] analyzed the
effect of process parameters on cotton dyeing with
reactive dye and got a wide range of application for
different reactive dyes. Dalal, M. M. et. al. [3] studied on
some bi-functional reactive dyes. They calculated dye bath
exhaustion and fixation by absorbance spectroscopy. Those bi-
functional dyes showed medium to good substantivity in dye
bath. Sultana, R. et.al. [4] performed some laboratory trials
with Drimarine Yellow CL2R, Drimarine Red CL5B and
Drimarine Blue CL2RL dyes and found almost similar dye
extinction coefficient and also good fixation yields for all.
This experimental work has tried to describe the influence of
electrolyte, alkali, liquor ratio and temperature on a
trichromatic shade matching with FCP dyes. For that reason
the CIELAB coordinates were analyzed here to understand the
relation of those parameters with the tone of a target shade.
2. MATERIALS & METHODS
2.1 Materials & Sample Preparation
Single jersey scoured and bleached cotton fabric was taken for
this experiment. The specifications of the fabric are listed in
Table 1.

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Table 1: Specification of the fabric
Parameters Scoured-Bleached Cotton fabric
Structure Single joursey
WPI 50
CPI 44
Yarn count 26 Ne
Stitch length 2.54 mm
GSM (g/m2
) 166
9 pieces of fabric samples were taken for dyeing, each one
weights 10 gram. They were named as S1, S2, S3, S4, S5, S6,
S7, S8 and S9 respectively. All the samples were dyed with
1% owf Drimarene Yellow K2R (DYK), 1% owf Drimarene
Red K8B (DRK) and 1% owf Drimarene Blue K2RL (DBK).
The sample S1 was dyed with 75 g/L glauber salt (electrolyte)
and 7.5 g/L soda ash (Alkali) in 1:10 liquor ratio at 60°C
temperature. For sample S2 and S3 salt amount was raised to
150 g/L and 225 g/L respectively keeping the other parameters
unchanged. For S4 and S5 soda ash amounts were 15 g/L and
22.5 g/L and other parameters were same as S1. For S6 and
S7, liquor ratios were 1:20 and 1:30 and other parameters were
same as S1. For the dyeing of S8 and S9 also the parameters
were like S1, only dye bath temperatures were different- 40°C
and 80°C respectively. Isothermal exhaust method was
followed for dyeing.
Fig 1: Dyeing curve
The laboratory dyeing machine had the programmed
temperature maintaining system and has specially designed
dye vessels with a septum by which chemicals were added
during the dyeing process. The dyeing process was continued
for 45 minutes after the addition of alkali. The temperature
versus time curve of dyeing is shown in Figure 1. Only for S8
and S9, the dyeing temperatures were different. After
treatment of those dyed samples were done according to the
flow chart-
Hot wash (80°C, 10 minutes)
↓
Neutralization (0.5 g/L acetic acid)
↓
Soap wash (1 g/L Sandopur SN, 95°C, 15 minutes)
↓
Squeezing
↓
Drying (60°C, 30 minutes)
2.2 Sample Analysis Procedure
The dried samples were tested in a reflectance
spectrophotometer (datacolor 650) with D65 light. The color
measurement readings in terms of opponent colors, red-green
(a*), yellow-blue (b*) and lightness (L*) were measured from
the instrument. The color strength (%) of the samples was
determined by taking S1 as the reference (100% color
strength). Following formula was used for the calculation:
% Strength =
𝑲/𝑺(𝒔𝒂𝒎𝒑𝒍𝒆)
𝑲/𝑺(𝒔𝒕𝒂𝒏𝒅𝒂𝒓𝒅)
× 100
Here K/S is the color value which is calculated from Kubelka-
Munk equation:
% Reflectance =
(𝟏−𝑹) 𝟐
𝟐𝑹
× 100
Where R is the spectral reflectance of a colored sample at a
wavelength of maximum absorption (where the reflection is
minimum).
The results obtained for different electrolyte amount are put in
Table 2. Results for different amount of alkali are put in Table
3. Results found for applying different liquor ratios are put in
Table 4 and for different temperatures are put in Table 5.
Table 2: CIELAB coordinates for different salt amount
Amount of electrolyte L* a* b* % Strength
75 g/L 33.01 8.09 1.95 100
150 g/L 32.28 8.40 1.68 105.1
225 g/L 30.96 9.37 1.64 115.7
Table 3: CIELAB coordinates for different alkali amount
Amount of alkali L* a* b* % Strength
7.50 g/L 33.01 8.09 1.95 100
15.00 g/L 32.23 7.93 1.81 105.6
22.50 g/L 31.55 8.59 1.72 110.8
Table 4: CIELAB coordinates for different liquor ratios
M(gm) : L (ml) L* a* b* % Strength
1:10 33.01 8.09 1.95 100
1:20 32.41 7.72 1.89 104.4
1:30 34.23 8.02 1.31 90.7
Table 5: CIELAB coordinates for different temperatures
Temperature L* a* b* % Strength
40°C 35.05 7.61 2.69 95.6
60°C 33.01 8.09 1.95 100
80°C 32.25 8.66 1.44 114.0

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The effects of electrolyte, alkali, liquor ratio and temperature
on 9 trichromatic shades of FCP dyed cotton fabric were than
analyzed. S1, S2, S3 were considered for electrolytes, S1, S4,
S5 were considered for alkali, S1, S6, S7 were considered for
liquor ratio and S1, S8, S9 were considered for temperature.
3. RESULTS & DISCUSSION
3.1.1 Effect of Electrolyte
Figure 2 represents the effect of electrolyte concentration on
FCP dye fabric. L* decreases with the increase of salt which
indicates that the darkness of color also increasing. Positive a*
value means the redness of a shade which is actually the
opposite of green. And green is actually the combination of
blue and yellow. Again positive b* is the yellowness of the
shade which is actually the opposite of blue.
Figure 2 shows that bigger amount of electrolyte made effects
on the uptake of DRK significantly. Electrolyte had the least
effect on DYK as b* was decreasing with the increase of
electrolyte. Alternately it can be said that tone of DBK was
increasing with the increase of electrolyte.
All over color strength of the shade was increasing which has
shown in Table 2.
Fig 2: Effect of electrolyte (glauber salt) concentration
3.1.2 Effect of Alkali
Figure 3 represents the effect of alkali concentration on FCP
dye fabric. Here almost similar kind of result was found. L*
decreases with the increase of alkali which indicates that dyes
had got opportunity to react with fiber due to presence of more
alkali. So the shade became darker. The strength% values in
Table 3 are also supporting this decision. Increase of a* was
not fluent with the increase of alkali amount. But b* was
always decreasing with the increase of alkali. But changes in
yellow were not so much significant. So alkali had a very little
effect on these FCP dyes though higher amount of alkali
influenced on overall color strength.
Fig 3: Effect of alkali (Soda ash) concentration
3.1.3 Effect of Liquor Ratio
Figure 4 represents the effect of liquor ratio on cotton dyeing
with FCP dyes. For 1:20 liquor ratio the lightness (L*) of the
fabric was least. And Table 4 shows that it had the highest
color strength at that liquor ratio. It is due to the distribution of
dyestuffs which may have occurred properly in 1:20. A small
liquor ratio (1:10) was insufficient for proper distribution of
total 3% owf FCP dyes. And the bigger one (1:30) was more
than sufficient. So dyes were spread out in large liquor and a
low uptake was the result. The value a* was less in 1:20 and
b* was decreasing with the increase of liquor ratio.
Fig 4: Effect of liquor ratio (M: L)
3.1.4 Effect of Temperature
Temperature had almost same type of effect like electrolyte.
Figure 4 represents that a higher temperature increases the L*
value and also the strength% (Table 5). Redness (a*) of the
shade was increasing with temperature and yellowness was
decreasing. Or in other words blueness was increasing. DRK
and DBK fixation was clearly increased in higher temperature,
though DYK fixation was decreasing.
0
5
10
15
20
25
30
35
L* a* b*
S1 (75 g/L)
S2 (150 g/L)
S3 (225 g/L)
0
5
10
15
20
25
30
35
L* a* b*
S1 (7.5 g/L)
S4 (15.0 g/L)
S5 (22.5 g/L)
0
5
10
15
20
25
30
35
40
L* a* b*
S1 (1:10)
S6 (1:20)
S7 (1:30)

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Fig 5: Effect of temperature (°C)
May be it is because of the reactivity of the dyes which
increases with temperature. The data from all tables and
graphs indicates that DYK has a greater tendency of
hydrolysis among these three.
4. CONCLUSIONS
In conclusion following observations can be pointed out-
1. Electrolyte, alkali and temperature positively
influence on the depth of the shade. 1:20 liquor ratio
was found suitable to gain better color value.
2. Among the three dyes DRK was positively
influenced by the parameters. DYK may have greater
tendency to be hydrolyzed.
3. Allover dye uptake order due to the increase of
parameter values: DRK˃ DBK> DYK.
4. For matching a reddish shade, increasing temperature
or electrolyte amount can help in matching the shade
easily. But in case of a greenish shade, increase of
those will not be fruitful.
5. Increase of bluish tone can be possible by increasing
electrolyte, alkali or temperature.
ACKNOWLEDGEMENTS
The author gratefully acknowledges the support from Clariant
(Bangladesh) Ltd. and Impress-Newtex Composite Textile
Ltd, Mirzapur, Tangail, Bangladesh.
REFERENCES
[1]. M. N. Miljkovic, V. B. Ignjatovic, A. R. Zarubica,
“Influence of Different Parameters on Dyeing of Knitting
Material with Reactive Dyes” Facta Universitatis; Physics,
Chemistry and Technology; Volume: 5, No: 1, 2007, PP: 69-
84.
[2]. Saeed Q., Bhatti, I.A., Zuber, M., Nosheen, S., Zia, M.A. ,
Abbas M., “Study of Application of Mono azo Reactive Dyes
on Cotton by Exhaust method and Printing Properties”
International Journal of Basic & Applied Sciences; Volume: 2,
No: 6, 2012; PP:191-197.
[3]. Dalal, M. M., Desai, R. K. “Dyeing Effects of
Bifunctional Reactive Dyes on Knitted Cotton Fabrics”
American Dyestuff Reporter; Volume: April,1996, PP: 22-25.
[4]. Sultana, R., Uddin, Z. M. “Compatibility Testing of
Reactive Dyes” Journal of Mechanical Engineering; Volume:
ME38, 2007, Page: 61-64.
[5]. Arzu, H. F. M., Rahman, M. M. “Effect of process
parameters on cotton fabric dyeing with
reactive dye especially on Green Color” Pakistan Textile
Journal, Volume: April, 2009.
[6]. Shenai, A. V. “Technology of Textile Processing Volume
II” Chemistry of Dyes and Principles of Dyeing; Sevak
Publications, 1993, PP: 527.
[7]. J. R. Aspland, “Textile dyeing and coloration” American
Association of Textile Chemists and Colorist, 1997, PP: 132.
BIOGRAPHIES
The author had completed his graduation from
College of Textile Technology, University of
Dhaka. His area of interest is textile wet
process. He has about five years of teaching
experiences.
0
5
10
15
20
25
30
35
40
L* a* b*
S8 (40°C)
S1 (60°C)
S9 (80°C)

Effect of dyeing parameters on dyeing of cotton fabrics with fluoro chloro pyrimidene reactive dyes

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