INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Qingdi Kong,Xiaojie Zhang,Kangrui Ma,Yuefa Gong,Hong Peng,Wei Qi
It is a challenging task to remove heavy metal ions efficiently from the wastewater containing high concentrations of complexants. In this work, a novel PEI-modified chitosan/activated carbon composite adsorbent (PCA) was prepared and applied to the removal of Cu(II) from pyrophosphate plating rinsing wastewater. The main species of Cu(II) in the pyrophosphate wastewater was [Cu(HP 2 O 7 ) 2 ] 4− or [Cu(P 2 O 7 ) 2 ] 6− , which were denoted as [Cu(II)-PP] anions. The maximum adsorption capacity of PCA for Cu(II) reached 1.41 mmol g −1 under the condition of pH = 8 and molar ratio of pyrophosphate to Cu(II) = 4:1. The adsorption kinetic behavior of Cu(II) on PCA followed the Elovich model best and PCA attained adsorption equilibrium within 36 h. The thermodynamic studies showed that the adsorption process of Cu(II) by PCA was endothermic and spontaneous. The PCA fixed bed column was used to remove Cu(II) from simulated pyrophosphate plating rinsing wastewater. After three consecutive adsorption-desorption cycles, the adsorption performance, hydraulic conductivity , and mechanical stability of PCA column did not decrease. The FTIR and XPS analysis results indicated that [Cu(II)-PP] anions can be adsorbed on PCA by electrostatic attraction with protonated amine groups or coordination with the amine groups of PCA via ligand substitution.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Shan Wang,Yingxin Xu,Shufen Chen,Baoyou Shi,Haoming Xu,Wande Ding,Xin Huang,Kefeng Zhang
Due to seasonal algal outbreaks in source water, the sand filtration (SF) suffering high load exhibited poor performance in turbidity and organic matter (OM) removal. However, the filtration performance is highly dependent on the state of contaminants. This study aims to improve removal efficiency of turbidity, algae and DOM by coupling a novel green titanium sulfate-chitosan (TS-CTS) compound filter aids with/without ferrate (VI) pre-oxidation. The results indicated that the turbidity decreased to 0.25 NTU and chlorophyll a removal up to 73.5% with TS/CTS (0.8/0.3 mg/L) filter aids were utilized, while the filtration cycle was not significantly shortened. The introduced Fe(VI) (5 mg/L, 10 min) before micro-flocculation realized moderate pre-oxidation and formed in-situ Fe(III), improved algae cells removal and effectively controlled of 2-methylisoborneol (＜10 ng/L) as well as the disinfection by-product precursors as polysaccharides and amino acid-like proteins. Positively charged in-situ Fe(III) as a dual-coagulant facilitated Ti hydrolysis and promoted the clustering, cross-linking, formed Ti-AOM/NOM-Fe complexes. Under the adsorption bridging and adsorption electro-neutralization of TS-CTS and in-situ Fe(III), the microflocs were formed, migrated, adhered and ultimately retained in filter layer media. This study can provide guidance for technological and agent selection in algae-laden surface water treatment.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Ke Wang,Fayong Li,Xiaoyan Sun,Feiyan Wang,Dong Xie,Yen Wei
It is of great significance to develop natural renewable polymer materials for different applications. Herein, the nano-sized hexagonal boron nitride nanosheets (hBNNSs) were facilely exfoliated through liquid-nitrogen, microwave, and ultrasonication treatments, and novel chitosan/hBNNSs (CS/hBNNSs) films were fabricated via solution casting. The obtained transparent CS/hBNNSs films demonstrated outstanding UV shielding ability with 98.51 % UV-A and 96.40 % UV-B lights being resisted. Compared to those properties of CS film, the oxygen permeability (OP) and carbon dioxide permeability (CO 2 P) of CS/hBNNSs films are significantly lowered by 96.35 % and 94.06 %, respectively, which are much better than CS/graphene oxide or other CS nanocomposite films. Moreover, the addition of hBNNSs in CS films also obviously improves their water vapor barrier ability, thermostability , mechanical properties, and antibacterial activity . The CS/hBNNSs films and the strategy developed in this work prove their great prospect in producing high-performance packaging films with desirable excellent UV shielding and oxygen barrier qualities.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2023
·Vol. 140
·期 38
·e54440
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IF 3
Quan Xuan Duong,Nguyen Hanh Do,Hien Thanh Pham,Thu Hong Anh Ngo
This study endeavors to augment the antibacterial and anti-biofouling properties of thin-film composite polyamide membranes by subjecting them to modification with antibacterial chitosan and silver nanoparticle materials through the UV-induced graft polymerization technique. Various surface assessment methods were employed, and the efficiency of the membrane performance was demonstrated through the flux and the retention of the filtration process, which used calcium chloride as the foulant. Antibacterial, antifouling, and anti-biofouling capabilities were assessed through several tests. The findings revealed that the chitosan/silver nanoparticles-grafted membranes exhibited superior antibacterial and anti-biofouling abilities with consistent flux and enhanced retention, underscoring the prospective implementation of this approach in filtration systems to curtail biofouling and bolster overall efficacy.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Jie Yu,Hongping Quan,Zhiyu Huang,Junbang Shi,Shihao Chang,Lilong Zhang,Xuewen Chen,Yuling Hu
The high viscosity of heavy oil made it difficult to exploit and transport heavy oil in pipeline. In this research, N -[(2-hydroxy-3-trimethylammonium) propyl] O -stearoyl chitosan tetraphenylboride (sc-CTS-st) was synthesized from chitosan, 2, 3-epoxy-propyl trimethyl ammonium chloride, sodium tetraphenylboron and stearyl chloride. sc-CTS-st contains long chain saturated aliphatic hydrocarbon, hydroxyl group and benzene ring, which could be dissolved in heavy oil fully and interacted with asphaltene. At 50 °C, the viscosity of heavy oil could be reduced to 13,800 mPa·s at most, with a viscosity reduction rate of 57.54 %. SEM and XRD showed that sc-CTS-st could affect the supramolecular accumulation structure of asphaltenes. Using FT-IR, sc-CTS-st could interact with asphaltene in the form of hydrogen bonds using the polar parts of the molecule, thereby weakening the self-association between asphaltene molecules. Molecular simulation was used to demonstrate the interaction mechanism between chitosan derivatives and asphaltenes. sc-CTS-st interacted with asphaltene through chemical bonding and influenced the self-association of asphaltene molecules. In addition, the non-polar portion of sc-CTS-st molecules could form a coating on the outside of the asphaltenes stacking structure, thus shielding or reducing the polarity of the stacking structure surface.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Mi Wu,Shun Mao,Xu Liu,Yunen Liu,Peifang Cong,Jianhua Lv,Huaqin Tian,Yan Zhao
Self-gelling and bioadhesive powders offered promising effective hemostats to suit irregularly shaped, complex and non-compressible wounds for clinical applications. In the current study, chitosan based polyelectrolyte complex coacervate were simply prepared by mixing high concentrations (10 %) of low molecular weight chitosan (CS) and polyacrylic acid (PAA) solutions. Obtained by lyophilization, the physical cross-linked polyelectrolyte complex powders would form a gel within 5 s upon hydration, which demonstrated excellent mechanical properties, significant antibacterial activities, strong and lasting adhesion on wet tissues in physiological environment. In vitro blood clotting assays showed that the CS/PAA powders could remarkably aggregate blood cells and accelerate blood clotting process. As studied by diverse hemorrhage models, including rat tail, liver and heart injuries and dog incision, CS/PAA powders significantly facilitated the decrease of blood loss as well as hemostatic time by creating robust physical barriers and promoting blood clot formation on the bleeding sites. These outstanding properties in terms of easy preparation, rapid self-gelling, strong wet adhesion, effective hemostasis and shape-adaptability endowed CS/PAA polyelectrolyte complex powders with great potential in managing acute hemorrhage of non-compressible trauma.
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Advanced Healthcare Materials
·
2023
·Vol. 12
·期 30
·2300746
·
IF 10
Jianwen Zhang,Xinyu Pei,Yihan Liu,Xianlan Ke,Ya Peng,Yajun Weng,Qinyong Zhang,Junying Chen
There is an urgent need to develop a series of multifunctional materials with good biocompatibility, high mechanical strength, hemostatic properties, antiadhesion, and anti-infection for applications in wound care. However, successfully developing multifunctional materials is challenging. In this study, two superhydrophobic composite coatings with good biocompatibility, high mechanical strength, strong antifouling and blood repellency, fast hemostasis, and good antibacterial activity are prepared on cotton fabric surface by simple, green, and low-cost one-step dip-coating technology. The results discussed in the manuscript reveals that the two superhydrophobic composite coatings can maintain good mechanical stability, strong water repellency, and durability under various types of mechanical damage, high-temperature treatment, and long-term strong light irradiation. The coatings also exhibit good repellency to various solid pollutants, highly viscous liquid pollutants, and blood. In vitro and in vivo hemostatic experiments show that both composite coatings have good hemostatic and anticlot adhesion properties. More importantly, this superhydrophobic coating prevents bacterial adhesion and growth and released Cu 2+ and Zn 2+ ions and chitosan to achieve bactericidal properties, thereby protecting injured skin from bacterial infection. The two superhydrophobic coatings enhance the antifouling, antiadhesion, hemostatic, and antibacterial functions of blood-repellent dressings and therefore have broad application prospects in medical and textile fields.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Jingde Yang,Binjie Zhang,Li Wang,Wenda Song,Bo Li,Zhengzhi Mu,Yufei Wang,Shuang Zhang,Junqiu Zhang,Shichao Niu,Zhiwu Han,Luquan Ren
Ultra-high molecular weight polyethylene (UHMWPE) fibers are broadly applied in lightweight and high-strength composite fiber materials. However, the development of UHMWPE fibers is limited by their smooth and chemically inert surfaces. To address the issues, a modified UHMWPE fibers material has been fabricated through the chelation reaction between Cu 2+ and chitosan coatings within the surface of fibers after plasma treatment, which is inspired by the hardening mechanism, a crosslinked network between metal ions and proteins/polysaccharides of the tips and edges in arthropod-specific cuticular tools. The coatings improve the surface wettability and interfacial bonding ability, which are beneficial in extending the application range of UHMWPE fibers. More importantly, compared to the unmodified UHMWPE fiber cloths, the tensile property of the modified fiber cloths is increased by 18.89% without damaging the strength, which is infrequent in modified UHMWPE fibers. Furthermore, the interlaminar shear strength and fracture toughness of the modified fibers laminate are increased by 37.72% and 135.90%, respectively. These improvements can be attributed to the synergistic effects between the surface activity and the tiny bumps of the modified UHMWPE fibers. Hence, this work provides a more straightforward and less damaging idea of fiber modification for manufacturing desirable protective and medical materials.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Aoqi Li,Weiping Chen,Han Shi,Yingqing Ye,Peixin Gong,Bo Jiang,Bo Xiao
Phenylboronic acid (PBA) groups are effective in building glucose-responsive drug delivery systems. Chitosan (CS) offers distinct advantages in the construction of PBA-based biomaterials, such as biodegradability and biocompatibility. However, challenges still persist due to the limited solubility of CS. This study proposes an efficient approach to introduce PBA groups into CS chains within 1 h via the O-(7-azabenzotriazol-1-yl)- N , N , N′ , N′ -tetramethyluronium hexafluorophosphate (HATU)-mediated amidation between 3-carboxyphenylboronic acid (CPBA) and O-hydroxypropyl chitosan (HPCS). The results showed that a wide range of substitution degrees, from 0.15 to 0.78, could be finely controlled by the amount of CPBA added. Furthermore, the obtained novel carboxyphenylboronic acid-grafted hydroxypropyl chitosan (PBA-HPCS) derivative showed enhanced crystallinity and thermostability compared to HPCS, and it demonstrated solubility in an alkaline solution. Based on the reversible bonding between the boronic acid group and cis-1,2/1,3-diols, PBA-HPCS was successfully used as an efficient crosslinker for the preparation of hydrogels incorporating sorbitol and polyhydroxy polymers, such as guar gum and polyvinyl alcohol. These hydrogels exhibited rapid gelation , rapid self-healing, injectability, and responsiveness to glucose and pH. These findings suggest that PBA-HPCS holds promise for advancing the development of PBA-based biomaterials.
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SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Sheng-nan Li,Hao Wu,Rui-quan Hou,Jing-tong Zhou,Su-kun Lin,Kun-yu Zhao,Rui-fei Wang,Su-qing Huang,Zhi-xiang Zhang
O -Carboxymethyl chitosan nanoparticles ( O -CMC-NPs), which are organic pesticide carriers, have excellent application potential. Exploring the effects of O -CMC-NPs on non-target organisms, such as Apis cerana cerana , is critical for their effective application; however, such studies are limited. This study investigated the stress response of A. cerana Fabricius after O -CMC-NPs ingestion. The administration of high O -CMC-NP concentrations enhanced the activities of antioxidant and detoxifying enzymes in A. cerana , with the activity of glutathione- S -transferase increasing by 54.43 %–64.33 % after one day. The transit of O -CMC-NPs into the A. cerana midgut resulted in their deposition and adherence to the intestinal wall, as they cluster and precipitate in acidic conditions. The population of Gillianella bacteria in the middle intestine was remarkably reduced after 6 d of administration of high O -CMC-NP concentrations. Contrastingly, the abundance of Bifidobacteria and Lactobacillus in the rectum significantly increased. These results indicate that the intake of high concentrations of O -CMC-NPs causes a stress response in A. cerana and affects the relative abundance of crucial intestinal flora, which may pose a potential risk to the colony. This implies that even nanomaterials with favorable biocompatibility should be applied reasonably within a specific range to avoid adverse effects on the environment and non-target organisms in the context of large-scale research and promotion of nanomaterials.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Liuzhou Chen,Kun Wu,Mohe Zhang,Nengsheng Liu,Chenxi Li,Jiangzhou Qin,Quanlin Zhao,Zhengfang Ye
A novel chitosan resin microsphere (CDCR) adsorbent, which was synthesized by secondary crosslinking and carbon disulfide modification, and was evaluated for its efficacy in recovering palladium from wastewater. The physicochemical properties and adsorption mechanism of CDCR were determined using scanning electron microscope energy dispersive system (SEM-EDS), fourier-transform infrared spectroscopy (FTIR), simultaneous thermal analyzer (TG-DSC), X-ray photoelectron spectroscopy (XPS), etc. The experimental results showed that its saturated adsorption capacity was about 204.34 mg/g. And the adsorption process of Pd(Ⅱ) was found to be in accordance with the pseudo-second-order kinetic model and the Freundlich model. Thermodynamic analysis indicated that the reaction between CDCR and Pd(Ⅱ) was a spontaneous endothermic process. CDCR showed good reusability, maintaining a Pd(Ⅱ) removal efficiency of 99.99% after eight adsorption–desorption cycles. In the multi-ion coexistence solution, CDCR also exhibited excellent selectivity towards Pd(Ⅱ) adsorption. Furthermore, the adsorption of Pd(Ⅱ) by CDCR was primarily attributed to electrostatic interaction with protonated amine groups and complexation with sulfur groups.
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International Journal of Electrochemical Science
·
2023
·
IF 1.5
Lijun Jing,Jun Lin,Qiqi Fei,Haowei Tang,Xiaodi Yang,Chong Sun
Caffeic acid (CA) and ferulic acid (FA), as the simple phenolic acids, widely exist in plants and food. In this experiment, a novel method based on graphite-like carbon nitride (g-C 3 N 4 ) and chitosan (CS) was applied to determinate CA and FA in food samples. X-Ray diffraction (XRD), fourier transform infrared spectrometer (FTIR), ultraviolet visible spectrophotometer (UV- vis ) and transmission electron microscope (TEM) were illustrated that g-C 3 N 4 was synthesized successfully and had a unique two-dimensional structure. Under the optimized conditions, including the scan rate, pH and so on, the modified electrode had a sensitive response to CA and FA in the range of 1-30 μg/mL and 5-30 μg/mL with the detection limits of 0.354 μg/mL and 4.964 μg/mL (S/N=3), respectively. The electrochemical method showed satisfactory results and provided a new approach to determinate phenolic acids with many advantages, such as rapid response, easy operation, low cost and highly sensitive.
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