Chitosan functionalization to prolong stable hydrophilicity of cotton thread for thread-based analytical device application

Li, Ya Dan; Li, Wan Yun; Chai, Hui; Fang, Can; Kang, Yue Jun; Li, Chang Ming; Yu, Ling

doi:10.1007/s10570-018-1891-3

Cited by 26 publications

(19 citation statements)

References 28 publications

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“…The cotton thread textile is an attractive substrate for wearable electrode fabrication since it has high flexibility with 3D structure providing a high specific surface area and it has self‐microfluidic properties. [ 3a,14 ] Inherently, the cotton thread textile is nonconductive, the incorporation of conductive materials is crucial for thread based electrode fabrication. Conductive ink coating is the most simple technique for creation of a conductive layer on the thread [ 15 ] and carbon nanotube (CNT) is a promising additive for conductive ink due to its high conductivity and high surface area.…”

Section: Introductionmentioning

confidence: 99%

“…[ 16 ] For enzyme‐based sensor, preservation of enzymatic activity is also critical; thus, chitosan is selected for enzyme preservation on the electrode using hydroxyl (OH) and amine (NH 2 ) groups for binding with enzymes via covalent bonding, electrostatic interaction, or physical entrapment. [ 14,17 ] Furthermore, the liquid absorption efficiency is also essential for sweat biomarker absorption, thus cellulose nanofibers (CNFs) was chosen for thread surface coating owing to its high water absorption property and high surface area. [ 18 ]…”

Section: Introductionmentioning

confidence: 99%

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Thread‐Based Wristwatch Sensing Device for Noninvasive and Simultaneous Detection of Glucose and Lactate

Promphet

Thanawattano

Buekban

et al. 2022

Adv Materials Technologies

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Glucose is a key biomarker for both type 1 and type 2 diabetes [2] and an effective approach for glucose monitoring is essential for diabetes management. Commonly, glucose levels have been measured by blood drawing requiring a painful sample collection. Alternatively, glucose can be detected in other biofluids such as tears, saliva, and sweat. [3] To avoid pain and infection risk arising from traditional invasive diagnosis, noninvasive methods have been explored. Sweat can be collected continuously and may be less prone to contamination than other biofluids. [4] Glucose level in sweat has been reported to be in a range of 0.01-1.11 × 10 −3 m and it is correlated well with blood glucose levels. [5] Likewise, lactate is an important biomarker for pressure ischemia, and hypoxia. [6] It has been reported that the increase of lactate level is directly related with DKA which is a serious complication of diabetes. [7] Wearable sensors play an important role for self-health monitoring. [8] However, the commercial wearable sensors such as Fitbit, Garmin, and Apple watch provide only physical information, such as heart rate without chemical information of the wearer. Since the electrochemistry is a simple, rapid, and portable analytical technique, the researchers have attempted to develop noninvasive wearable chemical sensors based on electrochemical An electrochemical sensing device based on a cotton-thread electrode for real-time and simultaneous detection of sweat glucose and sweat lactate is reported. The cotton thread surfaces are simply modified by cellulose nanofibers/carbon nanotube ink-Prussian blue/chitosan to enhance liquid adsorption, bioreceptor immobilization, and sensor performance in addition to minimize potential irritation and allergies on the wearer's skin. The modified thread surfaces are characterized by laser scanning confocal microscopy, scanning electron microscopy, and Fourier transform Raman spectroscopy. Amperometry is carried out via hydrogen peroxide detection for electrochemical characterization of the modified thread electrodes. A circuit and digital readout of this wearable sensor are customized designed to be integrated with thread electrodes for real-time and simultaneous detection of sweat glucose and sweat lactate. The wristwatch sensing device provides a linear range of 0.025-3 × 10 −3 m with a detection limit of 0.025 × 10 −3 m for glucose and a linear range of 0.25-35 × 10 −3 m with a detection limit of 0.25 × 10 −3 m for lactate. This device can effectively determine the cut-off levels of both glucose and lactate, which can distinguish between a normal individual and one with a diabetic condition. This platform opens a new avenue for noninvasive and real-time detection of other sweat biomarkers.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thread‐Based Wristwatch Sensing Device for Noninvasive and Simultaneous Detection of Glucose and Lactate

Promphet

Thanawattano

Buekban

et al. 2022

Adv Materials Technologies

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show abstract

“…In the biomedical field, cotton fiber has been modified to have antimicrobial properties [ 1 ], water repellency [ 2 ], and other enhancements of mechanical properties to work efficiently as a wound dressing. Cotton threads have a high specific area, are adjustable in shape, and have high absorption capability, which is good to absorb exudate, reduce blood loss, and keep the wound area free from other debris [ 3 , 4 ]. A minor setback is when a cotton thread wound dressing dries up, it tends to stick to the wound area during the removal process [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Drying Regimes and Different Coating Layers on Carboxymethyl Cellulose Cross-Linked with Citric Acid on Cotton Thread Fibers for Wound Dressing Modification

et al. 2022

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The oldest preservation techniques used are drying techniques, which are employed to remove moisture and prevent microorganisms’ growths, prolonging a material’s shelf life. This study evaluates the effects of drying methods on carboxymethyl cellulose (CMC) + citric acid (CA) coating layers on cotton threads. For this reason, cotton threads were washed and then coated with different layers of CMC cross-linked with CA, followed by drying using an oven (OD), infrared (IR), and a combination of oven + IR (OIR) drying methods at 65 °C. Our investigations revealed that CMC + CA yields a pliable biopolymer. The differences in drying regimes and coating layers of CMC + CA have a significant effect on the coated cotton thread strength and absorption capability. The study concluded that the IR drying regime is more effective to dry a single-layered cotton thread with a single layer of CMC + CA coating to enhance desirable properties for wound dressing modification.

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“…It is a structural polysaccharide with a similar structure to cellulose, although it has better mechanical properties and binding affinities with proteins than cellulose. Hence, it is often used to modify FP or cotton thread (both consisting of cellulose) to enhance the wet strength of substrate, the stability of the hydrophilicity, and the ability to immobilize proteins (Li et al, 2018;Ma et al, 2018). In this work, we used CS to modify the test and control lines on FP so that the protein could be firmly bonded to the cellulose surface by electrostatic force, hydrogen bonds, and hydrophobic interactions (Li and Peng, 2015;Lim et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

A simple and rapid immunochromatography test based on readily available filter paper modified with chitosan to screen for 13 sulfonamides in milk

Zeng¹,

Liang²,

Zheng³

et al. 2021

Journal of Dairy Science

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In this study, we developed a novel, simple, rapid, and low-cost colloidal gold-based immunochromatography method, with filter paper replacing nitrocellulose membrane as the substrate. To obtain adequately immobilized protein, chitosan was used to functionalize the filter paper. After conditions and parameters were optimized, the novel immunochromatography method was applied for detection of sulfonamide residues in milk. Quantitative detection was accomplished using a smartphone and Photoshop software (Adobe Inc., San Jose, CA), allowing us to screen 13 sulfonamides with a limit of detection ranging from 0.42 to 8.64 μg/L and recovery ranging from 88.2 to 116.9% in milk. The proposed novel method performed similarly to the conventional method that uses a nitrocellulose membrane as the transport medium, and it had lower cost and better usability because of the inexpensive and easily available filter paper.

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Chitosan functionalization to prolong stable hydrophilicity of cotton thread for thread-based analytical device application

Cited by 26 publications

References 28 publications

Thread‐Based Wristwatch Sensing Device for Noninvasive and Simultaneous Detection of Glucose and Lactate

Thread‐Based Wristwatch Sensing Device for Noninvasive and Simultaneous Detection of Glucose and Lactate

Impact of Drying Regimes and Different Coating Layers on Carboxymethyl Cellulose Cross-Linked with Citric Acid on Cotton Thread Fibers for Wound Dressing Modification

A simple and rapid immunochromatography test based on readily available filter paper modified with chitosan to screen for 13 sulfonamides in milk

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