Cyclodextrin-Based “Green” Wrinkle-Free Finishing of Cotton Fabrics

Patil, Namrata V.; Netravali, Anil N.

doi:10.1021/acs.iecr.9b04092

Cited by 29 publications

(17 citation statements)

References 42 publications

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“…ATR-FTIR was conducted to characterize the functional groups presented on nanosponges, as shown in Figure 5 . The native β-CD spectra revealed specific peaks at 3288 cm −1 , attributed to OH stretching, at 2917 cm −1 , attributed to CH 2 stretching, at 1152 cm −1 , attributed to C–C stretching, and at 1021 cm −1 , attributed to C–O–C stretching of the glycosidic bond, which is in agreement with the data reported in the literature [ 87 ]. The PVOH spectra displayed exclusive peaks at 3267 cm −1 , attributed to OH stretching, at 2939 cm −1 , attributed to CH stretching, at 2907 cm −1 , attributed to CH 2 stretching, at 1417 cm −1 , attributed to CH bending, at 1325 cm −1 , attributed to CH wagging, and at 1087 cm −1 , attributed to C–O–C stretching.…”

Section: Resultssupporting

confidence: 90%

Adsorption of Paraquat by Poly(Vinyl Alcohol)-Cyclodextrin Nanosponges

2021

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The contamination of hydrosoluble pesticides in water could generate a serious problem for biotic and abiotic components. The removal of a hazardous agrochemical (paraquat) from water was achieved by adsorption processes using poly(vinyl alcohol)-cyclodextrin nanosponges, which were prepared with various formulations via the crosslinking between citric acid and β-cyclodextrin in the presence of poly(vinyl alcohol). The physicochemical properties of nanosponges were also characterized by different techniques, such as gravimetry, thermogravimetry, microscopy (SEM and Stereo), spectroscopy (UV-visible, NMR, ATR-FTIR, and Raman), acid-base titration, BET surface area analysis, X-ray diffraction, and ion exchange capacity. The C10D-P2 nanosponges displayed 60.2% yield, 3.14 mmol/g COOH groups, 0.335 mmol/g β-CD content, 96.4% swelling, 94.5% paraquat removal, 0.1766 m2 g−1 specific surface area, and 5.2 × 10−4 cm3 g−1 pore volume. The presence of particular peaks referring to specific functional groups on spectroscopic spectra confirmed the successful polycondensation on the reticulated nanosponges. The pseudo second-order model (with R2 = 0.9998) and Langmuir isotherm (with R2 = 0.9979) was suitable for kinetics and isotherm using 180 min of contact time and a pH of 6.5. The maximum adsorption capacity was calculated at 112.2 mg/g. Finally, the recyclability of these nanosponges was 90.3% of paraquat removal after five regeneration times.

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Section: Resultssupporting

confidence: 90%

Adsorption of Paraquat by Poly(Vinyl Alcohol)-Cyclodextrin Nanosponges

2021

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“…The reduction in mechanical performance might also result from the alkaline degradation of the cellulose during the crosslinking. Moreover, the crosslinking of the cellulose chains restricts their elasticity, which makes the fibres stiffer and more brittle (Patil and Netravali 2019). Despite the loss in the tensile properties, the strength of the fibre was still comparable to the untreated Tencel fibres.…”

Section: Linitest Machinementioning

confidence: 98%

New method for determining the degree of fibrillation of regenerated cellulose fibres

Rissanen

You

et al. 2020

Cellulose

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In this study, we propose a convenient method for testing the fibrillation tendency of man-made cellulosic fibres (MMCFs) and investigate the possibility to apply a commercial crosslinker for Tencel fibres on the ionic liquid-based regenerated cellulosic fibre (Ioncell fibre). The fibrillation tendency of various MMCFs including viscose, Modal, Tencel and Ioncell fibres were examined through wet abrasion by using ball bearing and blending methods. The fibrillation tests using a laboratory blender was found to be a superior method over the ball bearing method in terms of time and energy saving. The fibrillation tendency of the fibres highly depended on their cellulose molecular orientation and the treatment intensity (time, temperature and alkalinity) in the blender. This fibrillation method was also applied to discover the effect of the crosslinking on the fibrillation tendency of the fibres. The Ioncell fibre proved to be suitable for crosslinking treatment to reduce fibrillation using 1,3,5-triacryloyl-hexahydro-1,3,5-triazine (TAHT)—a commercial Tencel crosslinker.

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“…The formation of inclusion complexes by CD has led to its diverse application in food, 6 − 9 cosmetic, 10 − 12 environmental, 13 − 15 agriculture, 16 textile, 17 chemical, and biotech industries. 2 , 4 , 18 For example, CD helps in separating cholesterol from milk 9 and in removing odor from air 15 by trapping the causative organic compound.…”

Section: Introductionmentioning

confidence: 99%

Molecular View into the Cyclodextrin Cavity: Structure and Hydration

2020

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We find, through atomistic molecular dynamics simulation of native cyclodextrins (CDs) in water, that although the outer surface of a CD appears like a truncated cone, the inner cavity resembles a conical hourglass because of the inward protrusion of the glycosidic oxygens. Furthermore, the conformations of the constituent α-glucose molecules are found to differ significantly from a free monomeric α-glucose molecule. This is the first computational study that maps the conformational change to the preferential hydrogen bond donating capacity of one of the secondary hydroxyl groups of CD, in consensus with an NMR experiment. We have developed a simple and novel geometry-based technique to identify water molecules occupying the nonspherical CD cavity, and the computed water occupancies are in close agreement with the experimental and density functional theory studies. Our analysis reveals that a water molecule in CD cavity loses out about two hydrogen bonds and remains energetically frustrated but possesses higher orientational degree of freedom compared to bulk water. In the context of CD-drug complexation, these imply a nonclassical, that is, enthalpically driven hydrophobic association of a drug in CD cavity.

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Cyclodextrin-Based “Green” Wrinkle-Free Finishing of Cotton Fabrics

Cited by 29 publications

References 42 publications

Adsorption of Paraquat by Poly(Vinyl Alcohol)-Cyclodextrin Nanosponges

Adsorption of Paraquat by Poly(Vinyl Alcohol)-Cyclodextrin Nanosponges

New method for determining the degree of fibrillation of regenerated cellulose fibres

Molecular View into the Cyclodextrin Cavity: Structure and Hydration

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