Surface modification by carboxymethy chitosan via pad-dry-cure method for binding Ag NPs onto cotton fabric

Xu, Qingbo; Ke, Xiating; Shen, Liwen; Ge, Naiqin; Zhang, Yanyan; Fu, Feiya; Liu, Xiangdong

doi:10.1016/j.ijbiomac.2018.01.091

Cited by 100 publications

(33 citation statements)

References 52 publications

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“…There is also observed Ag3d spectra of these samples that display peaks at 374.2-374.7 eV and 368.0-368.7 eV, which correspond to photoelectrons emitted from 3d 3/2 and 3d 5/2 states, respectively. The difference between the binding energies of such emissions is 6 eV for all cases, confirming that silver in samples is only Ag 0 [34][35][36]. Moreover, this experimental evidence is congruent with that obtained from UV-vis spectra regarding the full reduction of Ag + into Ag 0 (see Figure 5).…”

Section: Spectroscopic Characterizationsupporting

confidence: 86%

“…Herein, C1s and O1s spectra depict shifts in the binding energies related to C and O in C = O and O-C = O bonds that reach up 0.9 eV, with respect to those observed in Figure 8; as well as peaks around 374 and 368 eV in their Ag3d spectra, related to core emissions from 3d 3/2 and 3d 5/2 , respectively. Thus, considering that the energy of photoelectrons emitted from discrete states as 1s is quite susceptible to change depending on the bonds that elements form, the fact that peaks related to C-C, C-O, O-C = O, and C = O display shifts on their binding energies indicates that AgNPs are immobilized in CMC by coordination bonds [36,37]. Moreover, taking into account the results obtained from Raman spectra, the coordination bonds can be attributed to those Ag-O among AgNPs and COO − moieties of CMC.…”

Section: Spectroscopic Characterizationmentioning

confidence: 99%

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Influence of Polysaccharides’ Molecular Structure on the Antibacterial Activity and Cytotoxicity of Green Synthesized Composites Based on Silver Nanoparticles and Carboxymethyl-Cellulose

et al. 2020

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In this paper we report on the influence of polysaccharides’ molecular structure on the antibacterial activity and cytotoxicity of composites based on silver nanoparticles (AgNPs) immobilized into carboxymethyl-cellulose (CMC). These composites were green synthesized from the reduction of silver ions into aqueous solutions of the polysaccharide, using CMC with different degree of substitution (DS) and molecular weight (Mw). The composites were characterized by transmission electron microscopy (TEM), as well as infrared (ATR-FTIR), ultraviolet (UV-Vis), Raman, and X-ray photo-electron (XPS) spectroscopic techniques. The antibacterial activity was evaluated with minimum inhibitory concentration against Enterococcus faecalis. The cytotoxicity of composites was assessed against human gingival fibroblast. Experimental evidence suggests that particle size distribution and morphology of AgNPs change according to the quantity of silver precursor added to the reaction, as well as the DS and Mw of CMC used for composites preparation. This is related to the dispersion of silver precursor into aqueous solutions of the polysaccharide and the formation of Ag-O coordination bonds among AgNPs and COO− moieties of CMC. Moreover, these coordination bonds modify the ability of nanoparticles to produce and release Ag+ into aqueous dispersion, adjusting their antibacterial activity and the induction of cytotoxicity into the tested biological environments.

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Section: Spectroscopic Characterizationsupporting

confidence: 86%

Section: Spectroscopic Characterizationmentioning

confidence: 99%

Influence of Polysaccharides’ Molecular Structure on the Antibacterial Activity and Cytotoxicity of Green Synthesized Composites Based on Silver Nanoparticles and Carboxymethyl-Cellulose

et al. 2020

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“…Given their hydrophilic exterior and hydrophobic interior, polymeric NPs have been used to encapsulate lipid soluble drug molecules for targeted nanodelivery to improve stability, bioavailability and controlled release of the encapsulated drugs (Xin et al 2018). Covalent binding of Ag NPs onto cotton fabric through carboxymethyl chitosan was reported as an effective method for obtaining antimicrobial functions and outstanding laundering durability (Xu et al 2018a). Active molecules may also be entrapped inside NPs to protect host molecules from unexpected degradation.…”

Section: Mechanisms Of Nano-delivery Systems Loadingmentioning

confidence: 99%

Nano-enabled agriculture: from nanoparticles to smart nanodelivery systems

Xin¹,

Judy²,

Sumerlin³

et al. 2020

Environ. Chem.

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Environmental contextNano-enabled agriculture holds the promise of enhancing crop production while reducing the environmental impacts of agrochemicals. We review recent developments in the use of nano-fertilisers, nano-additives, nano-pesticides, nano-sensors, nano-cleansers and nano-delivery systems in agriculture. The review highlights the need for systematic studies on nanotoxicity and the development of cost-effective and eco-friendly nanomaterials for future applications. AbstractTo keep pace with the ever-increasing demand of world population (nearly 9.8 billion), worldwide food production will need to increase by 50% by 2050. Nanotechnology innovations show great promise for combating this challenge by delivering a more sustainable, efficient and resilient agricultural system, while promoting food security. Further exploration of nanotechnology applications in agriculture is necessary to realise its potential in manufacturing innovative agrochemicals and novel delivery platforms to enhance crop production and quality. Here, we review the fundamentals of nanotechnology and focus on its potential in agricultural applications. Progress has been made in the development of nano-fertilisers, nano-additives, nano-pesticides, nano-herbicides, nano-bactericides, nano-cleansers and nano-sensors to improve agrochemical efficiency, reduce runoff, enhance plant growth, and diagnose plant nutrition deficiencies and diseases. In addition, nano-delivery systems have been designed to deliver effective components to targeted sites within a plant to provide potential solutions to some devastating crop diseases which cannot be effectively managed with conventional methods. However, nano-enabled agriculture is still in its infancy and its applications are mostly theoretical. Therefore, more research is needed to develop biodegradable, cost-effective and safe nanomaterials for future application. Moreover, systematic studies are crucial to safeguard our food production system, while making efforts to raise public awareness of nanotechnology.

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“…The presence of Ag NPs or clay with chitosan may be decrease the positive cationic charge occupied surface and decrease the attractive forces between acid dye and cotton fabric surfaces decreasing the dye exhaustion (%) and the color strength (K/S) for cotton sample. [32][33][34][35][36] The CIE (L * , a * , b * ) system was used to investigate and evaluate the color coordinates where, L * refers to lightness/darkness values from 100 to 0 representing white to black, a * is the values run from negative (green) to positive (red) and, b * values run from negative (blue) to positive (yellow). The colorimetric data of blank and treated fabrics were provided in Table 3.…”

Section: Dyeing Of Raw and Treated Cotton Fabrics With Acid Dyementioning

confidence: 99%

Enhancement of dyeing cotton fabrics using nanocomposite

El‐Naggar

Mashaly²,

Fawzy³

2019

J.Text.color. pol. sci.

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A CTUALLY, the present current work addresses an innovative approach for benign enhancement of dyeing of cotton fabrics assisted with nanocomposite based on chitosan (Cs), silver nanoparticles (Ag NPs) and clay. The Cs/Ag NPs and Cs/Ag NPs/clay nanocomposites were prepared using UV irradiation and applied on the cotton fabrics by paddry-curing method. The blank and treated cotton fabrics were dyed with C.I. Acid Orange 74. The Dye exhaustion, colorimetric analysis as well as fastness properties of the treated fabrics was evaluated. The obtained data proves that the nanocomposite of Cs/Ag NPs/clay is a promising mixture for durable dyeing for cotton fabrics.

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Surface modification by carboxymethy chitosan via pad-dry-cure method for binding Ag NPs onto cotton fabric

Cited by 100 publications

References 52 publications

Influence of Polysaccharides’ Molecular Structure on the Antibacterial Activity and Cytotoxicity of Green Synthesized Composites Based on Silver Nanoparticles and Carboxymethyl-Cellulose

Influence of Polysaccharides’ Molecular Structure on the Antibacterial Activity and Cytotoxicity of Green Synthesized Composites Based on Silver Nanoparticles and Carboxymethyl-Cellulose

Nano-enabled agriculture: from nanoparticles to smart nanodelivery systems

Enhancement of dyeing cotton fabrics using nanocomposite

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