Surfaces and Interfaces
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2026
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IF 6
Qi Sun,Xiyue Chang,Siyu Du,Xinhao Jin,Yingdong Ma,Yujun Li,Yingjia Lu,Jinchao Li
CS@Zn-MOFs were synthesized via a facile coordination-driven coating method. • The composite shows enhanced colloidal stability and uniform element distribution. • It achieves 91.61% MB removal and high ROS generation under light irradiation. • Effective TC (88.78%) and EM (89.44%) removal via adsorption and AOPs. • Excellent recyclability, stability, high TOC removal, and low cytotoxicity for water treatment. The widespread presence of antibiotics in aquatic environments poses serious ecological and health risks due to their persistence and potential to promote antibiotic resistance. Conventional water treatment processes often fail to remove these micropollutants effectively, highlighting the need for advanced and sustainable remediation strategies. In this study, chitosan‑functionalized zinc‑based metal-organic framework (CS@Zn‑MOFs) with a spindle‑like morphology was developed to enhance photocatalytic removal of antibiotics from water. The composite was synthesized through a coordination-driven self-assembly process followed by CS coating. Comprehensive characterization including SEM-EDS, XRD, XPS, and FTIR, confirmed effective structural integration, homogeneous elemental distribution, and improved colloidal stability. Under light irradiation, CS@Zn-MOFs exhibited exceptional photocatalytic activity, achieving 91.61% removal of methylene blue within 120 min and facilitating substantial generation of reactive oxygen species (ROS). The composite significantly reduced residual levels of tetracycline (TC, 88.78%) and erythromycin (EM, 89.44%), demonstrating efficient antibiotic removal through a synergistic combination of adsorption and advanced oxidation processes (AOPs). Furthermore, CS@Zn-MOFs exhibited excellent recyclability and long-term stability across multiple cycles, coupled with high total organic carbon (TOC) removal efficiency and negligible cytotoxicity. These results collectively demonstrate that CS@Zn‑MOFs are an efficient and stable candidate for the photocatalytic remediation of antibiotic‑contaminated water. This illustration summarizes the design, mechanism, and performance of a novel chitosan-coated Zn-MOFs nanocomposite (CS@Zn-MOFs) for water remediation. The spindle-like Zn-MOFs are functionalized with a chitosan coating through hydrogen bonding and electrostatic interactions, enhancing stability and functionality. Under LED light irradiation, the composite generates abundant reactive oxygen species (ROS), which efficiently purify antibiotic pollutants (e.g., tetracycline and erythromycin) via adsorption and advanced oxidation processes. CS@Zn-MOFs exhibit excellent reusability, long-term stability, coupled with high total organic carbon removal efficiency and negligible cytotoxicity, showcasing great potential as a sustainable and effective photocatalytic material for treating antibiotic-contaminated water. Download: Download high-res image (195KB) Download: Download full-size image
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RSC Advances
·
2025
·Vol. 15
·期 26
·21121-21132
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IF 4.6
Kai Wang,Zewen Song,Ziyi Xu,Yang Xi,Yuwei Cui,Haijun Zhou
Chitosan is considered an excellent carrier material with great potential due to its good biocompatibility, abundant reserves, and high chemical reactivity. However, chitosan's chemical instability and low mechanical strength limit its applications. In this study, quaternized magnetic chitosan (QMCS) was prepared by modifying magnetic chitosan microspheres (MCS) with quaternary ammonium. The obtained adsorbent was characterized using scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The effect of pH value and adsorbent dosage on the adsorbent's performance was investigated. The experimental results indicated that QMCS exhibited superior adsorption performance for methyl orange (MO) compared to MCS. At 298 K and pH 4, the adsorption capacity of QMCS for a 125 mg L−1 methyl orange (MO) solution reached 486.13 mg g−1, with a removal efficiency of 99.38%. The adsorption behavior of the adsorbent towards MO was in good agreement with the Langmuir isothermal model and the quasi-second-order kinetics model. The mechanism of adsorption may be attributed to electrostatic interactions and ion exchange. The synthesis of QMCS was simple, environmentally friendly, and has significant potential for water pollution treatment.
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Journal of Water Process Engineering
·
2025
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IF 6.7
Yuliang Zhang,Xinhao Yan,Ting Shu,Xiahui Liu,Yanhua Lei,Yuwen Huang,Tao Liu,Xiaobo Chen
The global freshwater shortage underscores the urgent need for efficient and sustainable desalination technologies. Solar-driven evaporation offers a promising solution due to its low energy demand and environmental compatibility, with photothermal materials and evaporator design being key to enhancing performance. In this study, chitosan-based aerogels have been used as the substrate, and a vertical channel structure has been prepared through unidirectional freezing technology in fabricating PPy@GO-CG (polypyrrole@graphene oxide-chitosan) aerogel evaporators. Experimental results have showed that under 1 kW·m −2 simulated solar light, the water evaporation rate can reach 3.79 kg·m −2 ·h −1 , and the solar steam conversion efficiency is as high as 96.16 %. In saline conditions, salt accumulation was not observed until after 60 h of continuous irradiation, indicating strong salt-rejection capability. The evaporator exhibits excellent long-term stability, salt resistance, and inherent antibacterial properties, ensuring both efficiency and reliability for practical use. This work thus offers a promising strategy for solar-driven seawater desalination and thermal energy conversion.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Muyuan Zeng,Wenbo Li,Shuang Zhang,Siyuan Yang
Carboxymethyl chitosan (CMC), a macromolecular material with active hydroxyl and carboxyl groups, exhibits strong polarity and readily chelates with metal ions to form stable flocs. These properties make it a promising flocculant for recovering fine-grained iron oxide ores. In this study, CMCs with varying degrees of carboxymethyl substitution were synthesized to investigate their role in the magnetic separation of fine (−12.5 μm) specularite and quartz, focusing on the relationship between flocculation and selectivity. Under optimized conditions, CMC significantly enhanced the magnetic separation recovery of fine specularite by promoting selective flocculation, increasing recovery from 71.98 % to 93.74 %. In the specularite–quartz binary system, CMC selectively adsorbed onto specularite, inducing its aggregation while exhibiting minimal interaction with quartz. This selective aggregation improved magnetic separation performance, raising the iron grade and recovery of the magnetic concentrate by 2.1 % and 18.19 %, respectively. Fourier Transform Infrared Spectroscopy (FTIR) and molecular dynamics simulation (MDS) revealed that CMC’s carboxyl groups had a strong affinity for Fe atoms on the specularite surface, with adsorption energy nearly three times higher than on quartz. Sedimentation tests and polarized light microscopy confirmed that CMC promoted specularite aggregation via a bridging mechanism, increasing apparent particle size and improving separation efficiency. However, excessively long carbon chains sometimes entrapped quartz particles within specularite flocs, slightly reducing selectivity. These findings highlight CMC’s potential as an efficient, selective flocculant for fine iron oxide recovery and its broader applicability in mineral processing and related fields.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Yangyang Duan,You Wu,Juan Qiu,Houyi Ma
The development of self-healing anti-corrosion coatings has recently garnered significant attention as an efficient strategy for preventing substrate corrosion and prolonging substrate service life. Herein, we develop a chirality-induced dual self-healing coating through pH-responsive tryptophan isomers-loaded halloysite nanotubes (L/D-Trp@HNTs) imbedded into chitosan (CHI) coatings. Results showed that the L/D-Trp@HNTs/CHI coating exhibited an excellent self-healing behavior, which can originate from the release of L/D-Trp from the HNTs nanocontainers. The protection effect of the coating was effectively enhanced by two approaches. First, L-Trp could be released from the HNTs and then mainly permeates through the CHI coating, forming a protective film on the metal surface. Second, D-Trp released from the nanocontainers could be captured by the CHI coating through the formation of H-bonds, significantly increasing the crosslinking density of the CHI coating and reducing defects in the CHI coating. This natural polysaccharide CHI-based chiral system could open a new avenue toward corrosion protection applications.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Man Zhang,Jingxi Yang,Junyuan Zhang,Keqi Wo,Xiangyang Dong,Hongbing Deng,Man Wang,Cheng Yang
The reconstruction of critical-sized bone defects remains a significant clinical challenge. Natural polymers used for bone defects exhibit excellent biocompatibility and degradability; however, their inadequate mechanical properties, absence of biomimetic topological structures, and limited osteogenic potential hinder their suitability for clinical applications. In this study, we developed an all-natural wood hydrogel by integrating natural lignocellulosic nanofibers into chitosan hydrogels through delignification and vacuum impregnation. The all-natural wood hydrogel effectively mimics the structure of natural bone. Strontium ions mimicked bone’s phosphate fibers, chitosan hydrogels emulated collagen fibers, and WW was used to recreate the layered, anisotropic bone tissue structures. Furthermore, the tensile strength of the all-natural wood hydrogel reached approximately 12 MPa, demonstrating a significant improvement in the mechanical strength. In vitro experiments confirmed that the all-natural wood hydrogel showed excellent biocompatibility, promoting cell proliferation and migration. Additionally, the release of strontium ions from the all-natural wood hydrogel supports angiogenesis and osteogenesis. Transcriptomic analysis initially revealed that the all-natural wood hydrogel modulates BMSCs activity by upregulating angiogenic and osteogenic genes while activating PI3K-AKT and calcium signaling pathways. Moreover, in in vivo experiments, this all-natural wood hydrogel is adaptable to various cranial defects and accelerates the repair of critical-sized bone defects. These findings offer insights into the development of all-natural wood hydrogels for enhancing bone regeneration.
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ACS Sustainable Chemistry & Engineering
·
2024
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IF 7.1
Lihua Li,Qianru Su,Ke Xu,Li Ren,Qiuhan Zhao,Qiushuang Wu,Junfang Xia,Xin Lü,Li Wang
Surfactants are extensively utilized in food, pharmaceutical, and industrial fields owing to their distinct interfacial properties. Nonetheless, their defects of poor biocompatibility and biodegradability impose a significant burden on the natural environment and on human health. Herein, we design cinnamic acid-functionalized chitosan (CC) as a biobased surfactant by substituting certain hydrophilic amino groups in chitosan molecular chains with the hydrophobic benzene rings of cinnamic acid. CC, exhibiting a surface contact angle close to 90°, demonstrates exceptional emulsification capabilities. Molecular simulations suggest that there is substantial interaction energy between CC and water, oil, and CC molecules. CC can be self-assembled into a gel network or stably distributed at the oil–water interface based on the interaction of polar groups with water and between hydrophobic groups with oil. Leveraging these interfacial characteristics, CC can be employed in the preparation of high internal phase emulsions (HIPEs), cell scaffolds with adjustable pore sizes, and aerogels for oil–water separation and dye adsorption. Notably, HIPEs loaded with curcumin and quercetin exhibit robust stability in gastric juice, intestinal targeted release, noncytotoxicity, and resistance to bacterial and mold growth even after 90 days. This work provides some references for the development of new biobased surfactants.
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CARBOHYDRATE RESEARCH
·
2025
·
IF 2.5
Jingmin Cui,Yan Sun,Linqing Wang,Yuting Ji,Huishuang Zhao,Mingzhi Sun,Zhanyong Guo,Fang Dong
Quaternary ammonium salts of chitosan have been widely used in the development of anti-microbial biomaterials for their important role in inhibiting the growth of microorganisms. However, it is important to modify its structure to obtain more efficient and biologically active derivatives. Herein, a series of chitosan derivatives with antibacterial, antifungal, antioxidant, and non-cytotoxic properties was synthesized. These four quaternary ammonium salts of chitosan were prepared by incorporating 2-thiophenecarboxaldehyde, 2-furancarboxaldehyde, 2-pyridinecarboxaldehyde and benzaldehyde to form schiff bases, followed by a reductive amination to obtain the chitosan N -derivatives, and quaternized by iodomethane. The inhibition rate of thiophenecarboxaldehyde chitosan trimethyl ammonium iodide (TpTMC) to B. cinerea could reach 93.78% and the inhibition ability of pyridinecarboxaldehyde chitosan trimethyl ammonium iodide (PyTMC) to F. graminearum could reach 98.08% at the concentration of 1.0 mg/mL. Furthermore, furancarboxaldehyde chitosan trimethyl ammonium iodide (FrTMC) exhibited a strong ability to scavenge hydroxyl radicals and DPPH radicals, especially the DPPH radicals scavenging ability was comparable to that of L-ascorbic acid at the concentration of 1.6 mg/mL. The B3LYP/6-311++G (d, p) basis set was employed to determine electronic properties, including HOMO-LUMO energies, and to analyze the chemical reactivity of the compounds. L929 cells were used to evaluate the cytotoxicity of compounds at different concentrations (1−1000 μg/mL). The results demonstrated the diverse applications of aromatic ring-modified quaternary ammonium salts of chitosan, along with their significant antioxidant and antifungal effects against plant fungi. Therefore, these compounds have potential applications in the preparation of agricultural, biological, and medical materials.
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POLYMER BULLETIN
·
2025
·
IF 4
Jin Yang,Shen Fengting,Yu Haojie,Wang Huanan,Wang Li
Textiles are prone to bacterial proliferation, which may lead to unpleasant odors, infection, and inflammation. To prepare antibacterial textiles, post-finishing is a convenient and scalable method. However, conventional post-finishing coatings often exhibit poor adhesion to polyethylene terephthalate (PET) textiles, limiting their loading efficiency. This study developed a quaternized chitosan/tannic acid (QACS/TA) bicomponent finishing agent to address this challenge. When the finishing agent contained 2 wt% QACS and 1 wt% TA, the post-finishing coating demonstrated optimized adhesion to PET, resulting in a weight gain of more than 15% for the treated PET textiles. The pyrogallol groups on TA could form abundant hydrogen bonds with ester groups of PET and the amino and hydroxyl groups of QACS, acting as binders between QACS and PET. The treated textiles showed an antibacterial rate of 99.2% against E.coli and almost 100% against S.aureus . This study presents a convenient and effective approach to preparing antibacterial PET textiles with improved coating adhesion.
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Foods
·
2025
·Vol. 14
·期 11
·1981
·
IF 5.1
Dexin Zhao,Shiguo Peng,Feifei Chen,Alei Zhang,Kequan Chen
In this study, we developed an innovative method for one-step enzyme purification and immobilization utilizing polysaccharide-based microspheres through a chitosan-binding module that mediated affinity adsorption. The chitosan-binding domain derived fromPaenibacillussp. IK-5 was genetically fused with multiple target enzymes (lysine decarboxylase, glutamate oxidase, and formate dehydrogenase), all of which were successfully expressed in soluble forms. Three distinct polysaccharide microspheres with optimized surface characteristics were engineered to facilitate the concurrent purification and immobilization of these fusion enzymes. Comprehensive characterization using organic elemental analysis, fluorescence microscopy, and thermogravimetric analysis confirmed the efficient immobilization of fusion enzymes. Remarkably, the immobilized enzymes demonstrated exceptional operational stability, maintaining over 80% of their initial catalytic activity after ten consecutive reuse cycles. This study establishes a robust and versatile platform for enzyme immobilization, providing significant advantages in biocatalyst engineering applications.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qiancheng Liu,Xueye Chen,XuDong Wei,Junlong Sun,Changxia Liu
This study developed a high-performance flexible triboelectric nanogenerator (TENG) for self-powered wearable health monitoring by layer-by-layer assembly of MXene (Ti 3 C 2 T x , V 2 CT x ), chitosan (CS), and carbon nanotubes (CNTs).An innovative strategy was proposed to diminish MXene interlayer stacking via a two-step vacuum filtration method. A Ti 3 C 2 T x /CNT-V 2 CT x /CNT(TCVC) composite film with a hierarchical porous structure are synthesized to significantly enhance interfacial bonding strength and charge transfer efficiency. The open-circuit voltage (V oc ) 117.06 V and short-circuit current (I sc ) of 1.93 μA of TENG are realized by utilizing the synergistic effect of high electronegativity of MXene, conductive network of CNT and biocompatible crosslinking of CS. Systematic characterization demonstrated the optimized TCVC-TENG exhibits mechanical durability (>6000 cycles, <3 % decay), high sensitivity (9.84 V·N −1 at 0.1 N), rapid response/recovery times (170 ms/150 ms), and environmental robustness (20–80 °C). The sensor is applied to human health monitoring, which can continuously detect joint flexion amplitude, laryngeal vibration frequency and gait dynamics, thus realizing real-time assessment of physiological conditions. This work provides a scalable and cost-effective strategy for designing multifunctional self-powered wearable sensors with potential applications in Parkinson's disease early warning, athlete performance tracking, and personalized healthcare.
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ACS Applied Electronic Materials
·
2025
·
IF 4.7
Peixuan Wu,Hao Zhuang,Ziyu Qin,Rohan S. Dassanayake,Tawfik A. Khattab,Zeyu Liu,Yang Zhou,Yuanyuan Liu
Conductive hydrogel-based flexible wearable sensors are considered one of the best candidates for next-generation flexible wearable devices due to their flexibility, stretchability, and biocompatibility. However, most of the conventional conductive hydrogels do not possess antimicrobial properties, limiting their application in emerging flexible wearable devices. To address this issue, we successfully developed an antimicrobial and conductive composite hydrogel (QCS-PVA-C-MWCNTs) by the freeze–thawing method, which mainly consists of poly(vinyl alcohol) (PVA), antimicrobial chitosan modified by dimethyloctadecyl-(3-trimethoxysilylpropyl) ammonium chloride (TSA) (QCS), and hydroxylated multiwalled carbon nanotubes (C-MWCNTs). QCS-PVA-C-MWCNTs hydrogels exhibit excellent mechanical properties with high stretchability, excellent self-healing ability (<1 h), and reproducible adhesion performance. QCS-PVA-C-MWCNTs hydrogel-based flexible wearable sensors accurately and quickly monitor human activity (e.g., finger flexion, elbow flexion, mouth opening, and saying “thank you”). The conductivity of QCS-PVA-C-MWCNTs3 hydrogel is ∼7.4 S·m–1, and it also features a fast response (<0.24 s) and high stability (up to 5000 cycles). Moreover, QCS-PVA-C-MWCNTs hydrogels can effectively inhibit the growth of both Escherichia coli (>99.3%) and Staphylococcus aureus (>99.8%) bacterial strains. We envision that this work broadens the avenues for designing multifunctional chitosan-based hydrogels with a wide range of applications in human-computer interaction, sports training, and personal healthcare.
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