Synthesis of human hair fiber-impregnated chitosan beads functionalized with citric acid for the adsorption of lysozyme

Xu, Xiaohui; Bai, Bo; Wang, Honglun; Suo, Yourui

doi:10.1039/c6ra26542a

Cited by 13 publications

(6 citation statements)

References 58 publications

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“…The characteristic absorption bands of APP at 3400-3000, 1430, 1242, 1072, 1016, and 877 cm −1 are ascribed to -NH 4 + , -NH 4 + , P=O, PO (symmetric stretching), PO 2 , and POP/PO (asymmetric stretching), respectively [12]. The characteristic absorption bands observed at 3500-3300, 1620, 1430, 1378, 1160, 1079, and 1032 cm −1 for CS are ascribed to -OH and -NH 2 , C=O, O-H, (CN, amide), (CO, bridge oxygen), (COC component), and (COC component), respectively [13][14][15]. The FTIR spectrum of APP-CS showed no apparent differences as compared with that of APP.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Thermal Insulation and Flame-Retardant Properties of Polyvinyl Alcohol-Based Aerogels Composited with Ammonium Polyphosphate and Chitosan

Luo

et al. 2021

International Journal of Polymer Science

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Polyvinyl alcohol- (PVA-) based aerogels have attracted widespread attention owing to their low cost, eco-friendliness, and low density. However, the applications of PVA-based aerogels are limited by their flammability. In this study, a flame retardant, ammonium polyphosphate (APP), and a biopolymer, chitosan (CS), were added to polyvinyl alcohol (PVA), and the polymer was further crosslinked using boric acid (H3BO3). In the PVA aerogels, the negatively charged APP and positively charged CS formed a polyelectrolyte complex (PEC) through ionic interaction. Cone calorimetry and vertical burning tests (UL-94) indicated that the PVA composite aerogels have excellent flame retardancy; they could decrease the heat release rate, total heat release rate, and carbon dioxide (CO2) generation. Both PVA/H3BO3 and APP-CS in the composite aerogel could be burned to carbon, and the foamed char layer could act together to impart the PVA composite aerogels with good flame retardancy. Further, the decrease in the temperature at the backside of the aerogels with increasing APP-CS content, as determined by the flame-spraying experiment, indicated that the PVA-based aerogels with APP-CS can also serve as thermal insulation materials. This work provides an effective and promising method for the preparation of PVA-based aerogels with good flame retardancy and thermal insulation property for construction materials.

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Section: Resultsmentioning

confidence: 99%

Enhanced Thermal Insulation and Flame-Retardant Properties of Polyvinyl Alcohol-Based Aerogels Composited with Ammonium Polyphosphate and Chitosan

Luo

et al. 2021

International Journal of Polymer Science

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“…The MB adsorption isotherm was examined using Langmuir, Freundlich, and Dubinin–Radushkevich equilibrium isotherm models, using the following expressions, respectively (Equations 7–9; Tran et al, 2017; Xu et al, 2017):

q_{normale} = \frac{q_{normalm} C_{normale} K_{normalL}}{1 + C_{normale} K_{normalL}}

q_{normale} = K_{normalF} C_{normale}^{\frac{1}{n_{normalF}}}

q_{normale} = q_{DR} e^{- K_{DR} ε^{2}}

where q m (mg g −1 ) is the maximum adsorption capacity, K L (L mg −1 ) is the Langmuir equilibrium constant (Das & Pal, 2016). R L , the separation factor constant, was calculated according to Equation (10) and listed in Table 3 in the range of (0 < R L <1), suggest that the adsorption of CAR‐DTAB and CAR‐KCl on MB is appropriate (Doshi et al, 2018; Hai et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

“…The MB adsorption isotherm was examined using Langmuir, Freundlich, and Dubinin-Radushkevich equilibrium isotherm models, using the following expressions, respectively (Equations 7-9; Tran et al, 2017;Xu et al, 2017):…”

Section: Adsorption Isothermmentioning

confidence: 99%

Preparation and adsorption behavior of dodecyltrimethylammonium bromide modified carrageenan hydrogel beads with remarkable removal efficiency and thermostability in water

Sun¹,

Yang

2023

J Surfact & Detergents

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In this study, water‐soluble polymer carrageenan (CAR) was cross‐linked by dodecyltrimethylammonium bromide (DTAB) in an aqueous solution for the preparation of gel beads, which can be used for removal of methylene blue (MB). The combination of DTAB and CAR was validated by Fourier transform infrared (FTIR) spectroscopy, while the folded surface was characterized by scanning electron microscope. DTAB can be used as a modifier of CAR for promoting the hydrophobicity and stability of hydrogel beads, which even withstood 70°C in water for 24 h without dissociation. The best removal efficiency was achieved 99.6% in 100 mg L−1 MB aqueous solution by CAR‐0.5DTAB, and the maximum adsorption capacity of CAR‐1.5DTAB at 30°C reached 38.6 mg g−1 by wet weight (weight of gel beads in wet condition) in 2000 mg L−1 MB aqueous solution. The CAR‐DTAB adsorption behavior was best fitted with pseudo‐first‐order and Langmuir equations, respectively. The exothermic nature and spontaneity of adsorption process were proved by thermodynamic experiment. Reusability studies revealed that the adsorption performance displayed almost no change after 10 cycles of adsorption/desorption process. The properties of CAR‐DTAB in this research proposed a facile way to prepare stable CAR composite by cross‐linking with quaternary ammonium surfactant.

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“…For instance, Chen and co-workers developed the drug-loaded CA-modified CS hydrogels with application in wound dressing [16]. Xu's study reported the synthesis of CS beads functionalized with CA soaked with human hair fiber with high lysozyme adsorption capacity [17]. In another study, Rajan formu-lated cisplatin-loaded CS-based nanocomposites crosslinked with poly-oxalates and CA as potential carriers for controlled and targeted anticancer therapy [18].…”

Section: Introductionmentioning

confidence: 99%

Electrospun Nanofibrous Membranes Based on Citric Acid-Functionalized Chitosan Containing rGO-TEPA with Potential Application in Wound Dressings

et al. 2022

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The present research work is focused on the design and investigation of electrospun composite membranes based on citric acid-functionalized chitosan (CsA) containing reduced graphene oxide-tetraethylene pentamine (CsA/rGO-TEPA) as materials with opportune bio-properties for applications in wound dressings. The covalent functionalization of chitosan (CS) with citric acid (CA) was achieved through the EDC/NHS coupling system and was checked by 1H-NMR spectroscopy and FTIR spectrometry. The mixtures to be electrospun were formulated by adding three concentrations of rGO-TEPA into the 1/1 (w/w) CsA/poly (ethylene oxide) (PEO) solution. The effect of rGO-TEPA concentration on the morphology, wettability, thermal stability, cytocompatibility, cytotoxicity, and anti-biofilm activity of the nanofibrous membranes was extensively investigated. FTIR and Raman results confirmed the covalent and non-covalent interactions that appeared between the system’s compounds, and the exfoliation of rGO-TEPA sheets within the CsA in the presence of PEO (CsA/P) polymer matrix, respectively. SEM analysis emphasized the nanofibrous architecture of membranes and the presence of rGO-TEPA sheets entrapped into the CsA nanofiber structure. The MTT cellular viability assay showed a good cytocompatibility with the highest level of cell development and proliferation registered for the CsA/P composite nanofibrous membrane with 0.250 wt.% rGO-TEPA. The designed nanofibrous membranes could have potential applications in wound dressings, given that they showed a good anti-biofilm activity against Gram-negative Pseudomonas aeruginosa and Gram-positive Staphylococcus aureus bacterial strains.

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Synthesis of human hair fiber-impregnated chitosan beads functionalized with citric acid for the adsorption of lysozyme

Abstract: Herein, a novel CA-CS/HHF composite was firstly constructed by impregnating human hair fiber into a CS matrix and then functionalized with citric acid.

Cited by 13 publications

References 58 publications

Enhanced Thermal Insulation and Flame-Retardant Properties of Polyvinyl Alcohol-Based Aerogels Composited with Ammonium Polyphosphate and Chitosan

Enhanced Thermal Insulation and Flame-Retardant Properties of Polyvinyl Alcohol-Based Aerogels Composited with Ammonium Polyphosphate and Chitosan

Preparation and adsorption behavior of dodecyltrimethylammonium bromide modified carrageenan hydrogel beads with remarkable removal efficiency and thermostability in water

Electrospun Nanofibrous Membranes Based on Citric Acid-Functionalized Chitosan Containing rGO-TEPA with Potential Application in Wound Dressings

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