Desalination and Water Treatment
·
2024
·
IF 1
Xiaomin Tang,Ting Huang,Shixin Zhang,Jie Zheng,Huaili Zheng
The safety of drinking water arouses wide concern in countries. Dissolved organic matter (DOM) as a precursor of disinfection by-products is the potential threat to human health. An amphoteric chitosan-based flocculant, CS-g-P(AM-AMPS), was synthesized via graft copolymerization to improve DOM treatment in this study. Acrylamide as a trigger and bridge conduced to grafting sulfonate groups originating from 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) onto molecular chains of CS. Initiator dosage, reaction temperature and reaction time influenced the generation of free radicals and further impacted the characteristics and performance of CS-g-P(AM-AMPS). CS-g-P(AM-AMPS) possessing anionic sulfonate groups and cationic amido groups strengthened bridging and adsorption in drinking water treatment, enhanced the removal rate of DOM and the settling efficiency of flocs and weakened the inhibition of natural organic matter to coagulation. DOM was partly removed via co-settling with colloid particles and being trapped by flocs as well.
研究领域:
环境科学
·
水处理技术
·
高分子化学
·
公共卫生
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2020
·Vol. 83
·期 3
·739-750
·
IF 1.638
Fan Xiulei,Qian Zheng,Liu Jiaqiang,Geng Nan,Hou Jun,Li Dandan
Application of sewage sludge biochar as an adsorbent for antibiotics treatment has obtained special attention owning to its low cost and surface functionality. Three metal ions were selected to modify sewage sludge biochar through the pyrolysis with the metal loaded method. Fe loaded sewage sludge biochar (BC-Fe), Al loaded sewage sludge biochar (BC-Al) and Mn loaded sewage sludge biochar (BC-Mn) were characterized and used to explore the performance of adsorbing tetracycline (TC), sulfamethoxazole (SMZ) and amoxicillin (AMC). BC-Fe, BC-Al and BC-Mn possessed rougher surfaces, larger specific surface area and better pore structure. Intra-particle diffusion and Langmuir models were more suitable to describe the adsorption process. The maximum adsorption amount of TC, SMZ and AMC could reach 123.35, 99.01 and 109.89 mg/g by BC-Fe. Furthermore, the main mechanism of antibiotics adsorption by metal loaded sewage sludge biochars might be pores filling, Van der Waals forces and H-bonding. The study can not only solve the problems associated with the pollution of antibiotics from wastewater, but also reduced the treatment pressure of sewage sludge effectively. Modification enhanced the microcellular structure and promoted the degree of carbonization. Compared with biochar, metal loaded sewage sludge biochar exhibited better adsorption capacity. Fe ion was demonstrated to be the optimal modified material. Metal loaded sewage sludge biochars avoided the risk of polluting the environment.
研究领域:
环境科学
·
水处理
·
吸附技术
·
废弃物管理
·
生物炭改性
·
污染控制
✓ 已验证
DOI
高影响因子
Journal of Chromatography Open
·
2024
·
IF 0
Jinya Cao,Yuxia Shen,Zhaixin Liu,Shanshan Zhu,Huihui Wu,Yali Dang,Tianhua Li,Ning Gan
Triphenylmethane (TPM) fish drug residues and their metabolites exist in many aquiculture waters and can cause significant harm to consumers. Rapid, accurate, and simultaneous detection of their residues in foods is significant in protecting the safety of aquatic products. In the study, a new type of polydopamine coated polydimethylsiloxane (PDMS-PDA) stir bar was prepared for the automatic sorptive extraction and enrichment of malachite green, leucomalachite green, crystal violet, and leucocrystal violet which are common TPM drugs used in aquaculture. The surface of PDMS matrix was first turned to hydrophilic by plasma treatment to enhance the evenness and stability of PDA coating. Therefore, the PDMS-PDA stir bar can enhance its extraction capacity and selectivity towards TPMs. These were due to the synergisitic adsorption capacities of PDA and PDMS towards the dyes. A hand-held stirring device was installed with the stir bar for on-site extraction. After that, a portable mass spectrometer directly detected the eluted targets without chromatography separation. Under the optimized conditions. The four analytes' lower detection limit of 0.16–0.38 μg L -1 was obtained. Within 35 min, the stir bar device, combing with a portable mass spectrometer, was used for rapid pretreatment and real sample analysis of four analytes with a recovery of 84.3–110 %. All these prove that the assay exhibited potential application prospects for the on-site detection of TPM residues in aquatic waters.
研究领域:
分析化学
·
环境科学
·
食品安全
·
材料科学
·
质谱分析
✓ 已验证
DOI
NANO LETTERS
·
2019
·
IF 12.279
Lianhui Li,Zhigang Chen,Mingming Hao,Shuqi Wang,Fuqin Sun,Zhigang Zhao,Ting Zhang
Flexible self-powered multifunctional sensing systems provide a promising direction for the development of wearable electronics. Although increased efforts have been devoted to developing self-powered integrated devices, the development of flexible and adaptable sensing systems with miniaturized stable power supplies is highly desirable yet greatly challenging. Herein, an ambient moisture-induced self-powered wearable sensing system was fabricated by integrating a porous polydopamine layer with a hydroxy group gradient (called g-PDA) based moisture-enabled power generator and a flexible pressure sensor. Due to the large amount of gradient-distributed free cations (H+) and locally confined anions produced in wide electrode spaces during hydration of the thin porous g-PDA film, the moisture-induced potential and effective output power density of the g-PDA-based power generator rapidly reaches up to 0.52 V and 0.246 mW cm–2, respectively. Importantly, the voltage output within 120 s only has 6% change, and a continuously open-circuit voltage can be maintained after 1900 s of attenuation, which is a breakthrough for the duration of humidity generation. Finally, a self-powered wearable multifunctional sensing system has been demonstrated to be able to provide real-time monitoring of human physiological signals, without an external power supply, which opens new opportunities for future self-powered multifunctional sensing systems.
研究领域:
材料科学
·
能量收集
·
柔性电子器件
·
传感器技术
·
可穿戴设备
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shuaishuai Li,Xudun Shen,Bowang Zhao,Longnian Tang,Yechen Qian,Wenyao Li,Shijie Li
Aqueous sodium-ion batteries (ASIBs) are promising for large-scale electrical energy storage (LSEES) applications due to their cost and safety advantages. However, the low voltage stabilization window of water (∼1.23 V) and the lack of cathode with high specific capacity and long cycle life have limited their development. Cobalt-based Prussian blue analogues (NaCoPBAs) have the advantage of high theoretical specific capacity but short cycle life. Recently, the molecular crowding electrolyte (MCE) strategy has been proposed to improve the electrolyte voltage stability window (ESW) of electrolytes, in this work, we report an improved xMC (x: ratio, MC: molecular crowding agent) electrolyte that uses N–N dimethylacetamide (DMAC) as the molecular crowding agent and NaOTf as the advanced salt with an ESW of 2.65 V and excellent nonflammability. The side reactions of the NaCoPBA//Hard Carbon (HC) full-cell active material are improved with the aid of the electrolyte. Capacity retention of 75 % after 600 cycles with excellent cycling stability. These results demonstrate that this advanced MCE strategy can be utilized for practical applications designed for safety, high specific capacity and long cycle (ASIB).
研究领域:
储能技术
·
电化学
·
材料科学
·
电池技术
·
化学工程
✓ 已验证
DOI
高影响因子
European Physical Journal Plus
·
2024
·Vol. 139
·期 1
·1-13
·
IF 2.8
Wang Runda,Jiang Zhongying,Yang Fangyuan,Lei Yiteng,Sheng Jie
This study presents a novel category of tough PS-p(AAm-co-MBAA) double network (DN) hydrogels, synthesized through fully chemically cross-linked methods by introducing polyacrylamide network into hydrophobic polystyrene networks. Herein, we obtain the carboxyl-modified polystyrene (CPS) synthesized by polystyrene (PS) using reversible addition–fragmentation chain transfer (RAFT) polymerization, CPS and 4-arm amine poly(ethylene glycol) (4-arm-PEG-NH 2 ) serve as the first chemical cross-linking, providing a brittle and stiff network that allows energy dissipation. Concurrently, the second chemical cross-linking points, created by acrylamide (AAm) and N,N’-methylenebis(acrylamide) (MBAA), impart a ductile and soft network to enhance stretchability. The optimal tough PS-p(AAm-co-MBAA) DN hydrogel displays remarkable properties, including super stretchability (≈5.9 times), tensile strength (≈0.43 MPa), high toughness (≈1.66 MJ m −3 ), good recoverability property (≈94.6% stiffness recovery and ≈88% toughness recovery without any waiting time), and fatigue resistance. This study introduces a novel approach to design and manufacture tough hydrogels with remarkable overall characteristics by employing the collaborative process of RAFT polymerization. Graphical
研究领域:
材料科学
·
高分子化学
·
软物质物理
·
机械工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Shaohua Peng,Wenshuang Xu,Hui Liu
Stimuli-responsive hydrogels could effectively solve the problem that traditional drug carriers were difficult to deliver drug on-demand. However, some shortcomings such as complex preparation, single responsiveness, and narrow application still needed to be urgently overcome. In view of this situation, two kinds of hydrogels were elaborately designed in this work. In the unique ethanol/water mixed solvent , a homogeneous reaction system consisting of methacrylic acid (MAA) and N-isopropylacrylamide (NIPAM) was constructed, and a dual-responsive P(MAA-co-NIPAM) hydrogel was successfully synthesized. A near-infrared (NIR) responsive multi-functional PPy/P(MAA-co-NIPAM) hydrogel was subsequently prepared by the introduction of polypyrrole (PPy) via in-situ polymerization. NIR-responsive swelling, photodeformable, and photothermal ability of the hydrogel under NIR light irradiation were explored. It was found that rapid shape and temperature change could be achieved within 60 s for PPy/P(MAA-co-NIPAM) hydrogel. With doxorubicin as a model drug, the drug loading and in vitro controlled releasing behaviors under different conditions were comprehensively investigated. It was confirmed that the multi-responsive hydrogels had controllable drug releasing ability under different stimulations, which would realize potential targeted drug delivery in physiological environment. This work might provide a new synthetic method of hydrogel for drug releasing, which was expected to expand the potential application domain of hydrogel materials in NIR penetration targeted therapy.
研究领域:
药学
·
材料科学
·
生物医学工程
·
高分子化学
·
控制药物递送
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2014
·Vol. 16
·期 23
·11584-11589
·
IF 4.198
Yunyun Huang,Wensheng Lin,Kan Chen,Wenkai Zhang,Xudong Chen,Ming Qiu Zhang
A water-processable blue fluorescent silver nanoparticle@graphene–polymer composite (Ag@G–pNIPAM) consisting of graphene coated with a thermally responsive poly-(N-isopropylacrylamide) (pNIPAM) shell is prepared. The pNIPAM shell swells or collapses as a function of temperature, serving as a means to trap silver nanoparticles in solution and get them sufficiently close to the graphene core to provide fluorescence enhancement based on the local surface plasmon resonance (LSPR) effect. The unique thermoresponsive properties and high enhancement ratio of the material should find application in solution fluorescence enhancers and a variety of biomedical applications, such as cellular uptake, sensing and imaging.
研究领域:
纳米医学
·
生物材料
·
分子影像学
·
生物传感
·
药物递送系统
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 42
·24251-24261
·
IF 10.733
Yunyun Zhong,Lei Zhong,Shuanjin Wang,Jiaxiang Qin,Dongmei Han,Shan Ren,Min Xiao,Luyi Sun,Yuezhong Meng
With the rapid development of electronic devices and electric vehicles, the requirements for their safety issues and service stabilities have become more and more strict. Single-ion gel polymer electrolytes exhibit outstanding ion conduction, high safety, good flexibility and a lithium transference number close to unity, leading to extensive research. In this work, a flexible fluorinated polysulfonamide based single-ion polymer electrolyte (SIPE) was synthesized using lithium [(4-styrenesulfonyl)(fluorosulfonyl)imide] (LiSFSI), pentaerythritol tetrakis(3-mercaptopropionate) (PETMP) and pentaerythritol tetraacrylate (PET4A) via one-step in situ photoinitiated thiol–ene click reaction in plasticizers, with electrospun poly(vinylidene fluoride) (PVDF) as the standing membrane. The influence of plasticizer content was investigated and the optimized electrolyte exhibits ultra-high ionic conductivity (5.81 × 10−3 S cm−1 at 28 °C) and a high lithium transference number of 0.91, near to unity. This ionic conductivity is among the highest ionic conductivities exhibited by SIPEs reported to date. Its electrochemical stability window is up to 5.2 V. More importantly, Li/LiFePO4 cells using the prepared SIPE as both the electrolyte and separator displayed high reversible capacity at room temperature. It also exhibits excellent long-term stability and reliability as it maintains a capacity of 140 mA h g−1 at 0.2C rate even after 230 cycles without obvious decay at room temperature.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
电池技术
✓ 已验证
DOI
高影响因子
Polymer Chemistry
·
2014
·Vol. 5
·期 20
·5967-5977
·
IF 5.368
Bo Zhang,Hui Tang,Peiyi Wu
Dynamic thermal phase transition behavior of a well-defined poly(N-isopropylacrylamide)–poly(2-hydroxyethyl methacrylate) (PNIPAM–PHEMA) interpenetrating polymer network (IPN) microgel in D2O synthesized by two-step precipitation polymerization was studied by means of IR spectroscopy in combination with the perturbation correlation moving window (PCMW) technique and two-dimensional correlation spectroscopy (2Dcos) analysis. Due to the hydrophobic and non-thermo-responsive properties of PHEMA and the special IPN structure, the IPN microgel exhibited an unusual thermally induced collapse process. The introduction of PHEMA would lower the volume phase transition temperature (VPTT) and the volume phase transition degree. 2Dcos was finally employed to discern the sequence order of all the group motion during heating and cooling processes. PHEMA plays different roles in different stages during the volume phase transition. Additionally, as PHEMA exhibits only a slight response to temperature, it would provide the PNIPAM–PHEMA IPN microgel with good reversibility.
研究领域:
高分子科学
·
生物材料
·
药物递送
·
智能响应材料
·
热敏性水凝胶
✓ 已验证
DOI
高影响因子
WOOD SCIENCE AND TECHNOLOGY
·
2019
·Vol. 53
·期 5
·1051-1060
·
IF 1.912
Huang Yaoge,Li Gaiyun,Chu Fuxiang
In this work, a new simple and environmentally friendly wood modification method was used to improve the dimensional stability of fast-growing wood. The wood samples were submerged in a neutral aqueous solution of 40% N -isopropylacrylamide/2-hydroxyethyl methacrylate (NIPAM/HEMA) at a mass ratio of 1/6 in the presence of catalytic amounts of 2,2′-azobis[2-methylpropionamidine] dihydrochloride (AAPH). The impregnated samples were heated at 60 °C for 12 h, followed by a heating period at 103 ± 2 °C for 12 h, in the course of which an in situ graft polymerization occurred in the cell wall. The results of scanning electron microscopy and energy-dispersive X-ray analyses indicate that the water-soluble vinyl monomers could effectively permeate into the wood cell walls. Infrared spectra showed that water-soluble monomers were in situ polymerized in wood. The results of XPS indicate that the water-soluble vinyl monomers could graft onto wood cell walls. The dimensional stability of poplar wood modified by the water-soluble vinyl monomers treatment was remarkably improved compared with that of untreated poplar wood.
研究领域:
木材科学
·
高分子材料
·
林产化工
·
生物质材料
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 59
·期 2
·715-727
·
IF 4.5
Li Bin,Zhou Mengjing,Wu Aolin,Liu Haiying,Du Li,Su Lihua
Preparation of composite hydrogels by in situ polymerization (SP) using choline chloride (ChCl), acrylamide (AM), and urea (U) as raw materials for deep eutectic solvent (DES), with the introduction of PVA and PVDF as fillers into DES. Characterization of the composite hydrogels was conducted using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). This study analyzed the pressure sensitivity, piezoelectricity, swelling behavior, and mechanical properties of the composite hydrogels. The results indicate that due to the dipole–dipole interactions between PVA and PVDF, the composite hydrogels exhibit excellent pressure sensitivity and piezoelectric performance. When the ratio of PVA to PVDF is 1:1, the composite hydrogels exhibit optimal performance, with a 3.37-fold increase in pressure sensitivity and a 6.49-fold increase in piezoelectricity compared to other ratios. This research provides a method for preparing composite hydrogels with excellent piezoelectric performance and pressure sensitivity.
研究领域:
材料科学
·
高分子科学
·
化学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）