Exposure of red calico leaf powder and cotton fabrics to
different doses of gamma radiations (5, 10, 15, 20 and 25 kGy)
had varying effects on colour strength of cotton fabrics (Fig. 1).
Gamma ray treatment of 15 kGy proved to be most effective in
improving colour strength of cotton fabrics dyed with red calico
leaf extract compared with other doses. Gamma ray treatment of
15 kGy produced significant modifications on surface of fabric
where hydroxyl group of cellulose units were converted into
carboxylic group that upon dyeing showed firm interaction with
dye molecules. This interaction was confirmed by investigation of
fabric in CIE Lab system [24]. It seemed that below 15 kGy, the
surface of fabric cellulose units were not properly activated for
dyeing, while at higher doses of gamma radiations, fabric might
be either degraded or its fibres might face dislocation [25]. Due
to this degradation of actual colourant, molecules might showed
less absorbance on fabric and upon investigation showed low
colour depth. During extraction process gamma ray caused more
interaction with colourant in alkaline media as compared to
aqueous or alcoholic [26,27]. Previously, it was found that
gamma ray treatment of dye powder improved colour extraction
without harming its physiological characteristics [28,29]. The
same effects of gamma radiations were observed in our studies.
The values given in Figs. 1e3 showed that an absorbed dose of
15 kGy produced darker shades. At this dose, the fabric surface
might be evenly modified and sorbed dye molecules. Hence,
15 kGy was the optimum absorbed dose for extraction of the
colourant and surface modification of fabrics.
Exposure of red calico leaf powder and cotton fabrics to
different doses of gamma radiations (5, 10, 15, 20 and 25 kGy)
had varying effects on colour strength of cotton fabrics (Fig. 1).
Gamma ray treatment of 15 kGy proved to be most effective in
improving colour strength of cotton fabrics dyed with red calico
leaf extract compared with other doses. Gamma ray treatment of
15 kGy produced significant modifications on surface of fabric
where hydroxyl group of cellulose units were converted into
carboxylic group that upon dyeing showed firm interaction with
dye molecules. This interaction was confirmed by investigation of
fabric in CIE Lab system [24]. It seemed that below 15 kGy, the
surface of fabric cellulose units were not properly activated for
dyeing, while at higher doses of gamma radiations, fabric might
be either degraded or its fibres might face dislocation [25]. Due
to this degradation of actual colourant, molecules might showed
less absorbance on fabric and upon investigation showed low
colour depth. During extraction process gamma ray caused more
interaction with colourant in alkaline media as compared to
aqueous or alcoholic [26,27]. Previously, it was found that
gamma ray treatment of dye powder improved colour extraction
without harming its physiological characteristics [28,29]. The
same effects of gamma radiations were observed in our studies.
The values given in Figs. 1e3 showed that an absorbed dose of
15 kGy produced darker shades. At this dose, the fabric surface
might be evenly modified and sorbed dye molecules. Hence,
15 kGy was the optimum absorbed dose for extraction of the
colourant and surface modification of fabrics.
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Exposure of red calico leaf powder and cotton fabrics to
different doses of gamma radiations (5, 10, 15, 20 and 25 kGy)
had varying effects on colour strength of cotton fabrics (Fig. 1).
Gamma ray treatment of 15 kGy proved to be most effective in
improving colour strength of cotton fabrics dyed with red calico
leaf extract compared with other doses. Gamma ray treatment of
15 kGy produced significant modifications on surface of fabric
where hydroxyl group of cellulose units were converted into
carboxylic group that upon dyeing showed firm interaction with
dye molecules. This interaction was confirmed by investigation of
fabric in CIE Lab system [24]. It seemed that below 15 kGy, the
surface of fabric cellulose units were not properly activated for
dyeing, while at higher doses of gamma radiations, fabric might
be either degraded or its fibres might face dislocation [25]. Due
to this degradation of actual colourant, molecules might showed
less absorbance on fabric and upon investigation showed low
colour depth. During extraction process gamma ray caused more
interaction with colourant in alkaline media as compared to
aqueous or alcoholic [26,27].ก่อนหน้านี้ พบว่า รังสีรักษาผงสี
การสกัดสีที่ดีขึ้น โดยไม่ทำร้าย 28,29 ลักษณะ [ สรีรวิทยา ]
ผลเดียวกันปริมาณรังสีที่พบในการศึกษาของเรา
ค่าให้ลูกมะเดื่อ . 1e3 พบว่าดูดซึมยา
15 kGy ผลิตเฉดเข้ม ขนาดนี้ พื้นผิวผ้า
อาจจะทั่วถึงการแก้ไขและดูดซับโมเลกุลสี . Hence,
15 kGy was the optimum absorbed dose for extraction of the
colourant and surface modification of fabrics.
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