Investigation on dyeing mechanism of modified cotton fiber

Zhai, Xiaolei; Ma, Jun; Wu, Yanxiu; Niu, Tianjie; Sun, Dongfa; Fang, Long; Zhang, Xiaodong

doi:10.1039/d2ra05668b

Cited by 11 publications

(4 citation statements)

References 42 publications

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“…As depicted in Figure 6a,b, the reactive dye successfully penetrated the interior of both the raw and modified cotton fibers. The sulfur content was measured at 10 points along the cross-sectional diameter of the fibers, 47 revealing a gradual decrease in the sulfur content from the outside to the inside of the fibers. However, the sulfur content of the modified cotton fibers was considerably higher than that of the raw cotton fibers, indicating a superior dye permeability in the modified cotton fibers.…”

Section: Zeta Potential Analysismentioning

confidence: 99%

Fabrication of Multifunctional Cotton Fabrics with Antibacterial, Hydrophobic, and Dyeing Performance

Ma,

Niu,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Cotton fibers have received considerable attention owing to their functional properties. Current research endeavors have shifted toward devising straightforward and versatile approaches for modifying cotton fibers. Herein, a simple and feasible method was proposed for preparing multifunctional cotton fibers. This method entailed subjecting cotton fibers to alkaline conditions, prompting the epoxy group in epoxidized soybean oil to engage in a ring-opening reaction with the hydroxyl group in cotton fibers and the amino group in polyhexamethylene guanidine hydrochloride. Epoxidized soybean oil acted as a bridge, forming a covalent bond between polyhexamethylene guanidine hydrochloride and cotton fibers, thereby facilitating the cationization of cotton fibers. Structural changes in the modified cotton fibers were characterized using Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and energy-dispersive X-ray spectroscopy. The modified cotton fibers were also evaluated for their dyeing, antibacterial, and hydrophobic properties. The results demonstrated that the dye exhaustion and total dye utilization of modified cotton in salt-free dyeing were much higher than those of raw cotton in conventional dyeing. The water contact angle of the modified cotton fiber reached 139.5°, and their antibacterial properties were partially improved. Importantly, this chemical modification was performed under mild conditions, highlighting its simplicity and environmentally friendly nature.

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Section: Zeta Potential Analysismentioning

confidence: 99%

Fabrication of Multifunctional Cotton Fabrics with Antibacterial, Hydrophobic, and Dyeing Performance

Ma,

Niu,

Wang

et al. 2023

ACS Appl. Mater. Interfaces

Self Cite

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“…Unlike the ultrafast decays at approximately nanoseconds for fluorescent proteins, traditional dyes, , and quantum dots, Ln 3+ NCs generally exhibit much longer lifetimes (μs–ms) and thus wider tunable range, especially for their NIR emissions. The long fluorescence lifetime of Ln 3+ NCs lowers the difficulty of data acquisition and makes it easier to filter out background signals during the imaging process. , However, the wider tunable range of lifetime is advantageous for encoding information in lifetime imaging, leading to a significant improvement in spatial resolution for fluorescence lifetime imaging. ,, …”

Section: Introductionmentioning

confidence: 99%

“…Especially, NIR photons have lower light absorption and scattering in biological tissues as compared to visible photons and, therefore, can achieve deeper penetration for in vivo applications like bioimaging and phototherapy. 5−7 Unlike the ultrafast decays at approximately nanoseconds for fluorescent proteins, 8 traditional dyes, 9,10 and quantum dots, 11 Ln 3+ NCs generally exhibit much longer lifetimes (μs−ms) and thus wider tunable range, especially for their NIR emissions. The long fluorescence lifetime of Ln 3+ NCs lowers the difficulty of data acquisition and makes it easier to filter out background signals during the imaging process.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Unlike the ultrafast decays at approximately nanoseconds for fluorescent proteins, 8 traditional dyes, 9 , 10 and quantum dots, 11 Ln 3+ NCs generally exhibit much longer lifetimes (μs–ms) and thus wider tunable range, especially for their NIR emissions. The long fluorescence lifetime of Ln 3+ NCs lowers the difficulty of data acquisition and makes it easier to filter out background signals during the imaging process.…”

Section: Introductionmentioning

confidence: 99%

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Bidirectional Lifetime Tuning of Er 1530 nm Emission Induced by Yb

Li,

Wang,

Ehtesham

et al. 2024

ACS Omega

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Wide-range NIR lifetimes of lanthanide ion-doped nanocrystals are highly desired for numerous bioapplications. As one of the most promising NIR emission bands, the lifetime of Er 3+ at 1.5 μm can be as long as ∼10 ms and be greatly shortened by increasing the doping level of either activator Er 3+ or sensitizer Yb 3+ . However, the shortened lifetime is mostly accompanied by the quenching effects, highly restraining the light signal intensity. Alternatively, prolonging the lifetime of Er 3+ NIR lifetime without luminescence quenching is of vital significance as it raises the upper limit of the lifetime range and maintains the effective signal intensity. In this work, we revealed that Yb 3+ can bidirectionally tune the NIR lifetime of Er 3+ . By introducing Yb 3+ , in addition to the substantially improved luminescence intensities, the prolonged NIR lifetime can be generated in low-Er 3+ -doped NaYF 4 nanocrystals, while monotonously decreased lifetime appears in Er 3+ heavily doped nanocrystals. To investigate the mechanisms of this bidirectional lifetime tuning and meanwhile avoid additional structural influences, the size and morphology of nanocrystals with different doping compositions were controlled to be similar. The decay dynamics of Er 3+ NIR emissions of different nanocrystals were simulated to explain the effects of Yb 3+ . This work provides insights into the manipulation of the NIR lifetime in Er 3+ /Yb 3+ -codoped nanocrystals.

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Sustainable dyeing of chemically modified cotton fabric with reactive dyes in acidic condition

Sarwar,

Jabbar,

Riaz

et al. 2024

Cellulose

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Investigation on dyeing mechanism of modified cotton fiber

Abstract: In this investigation, the dyeing mechanism of cotton fibers was investigated through adsorption isotherm, adsorption thermodynamics, adsorption kinetics, activation energy, diffusion coefficient, half-dyeing time and process of fixation.

Cited by 11 publications

References 42 publications

Fabrication of Multifunctional Cotton Fabrics with Antibacterial, Hydrophobic, and Dyeing Performance

Fabrication of Multifunctional Cotton Fabrics with Antibacterial, Hydrophobic, and Dyeing Performance

Bidirectional Lifetime Tuning of Er 1530 nm Emission Induced by Yb

Sustainable dyeing of chemically modified cotton fabric with reactive dyes in acidic condition

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