ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Hao Deng,Yunmiao Yang,Xiaohong Tang,Yongsheng Li,Fangfang He,Quanping Zhang,Zhong Huang,Zhijian Yang,Wenbin Yang
A kind of silicone rubber (SR)/paraffin (Pa)@silicon dioxide (SiO2)@polydopamine (PDA) phase-change composite was prepared in this work. The double-shelled Pa@SiO2@PDA phase-change microcapsules were constructed by oxidative self-polymerization of dopamine (DA) in Tris-HCl buffer solution. The effect of the DA content on the properties of Pa@SiO2@PDA microcapsules and SR/Pa@SiO2@PDA composites was researched. Due to the protective effect of SiO2, PDA layer, and SR matrix, the SR/Pa@SiO2@PDA composites have good leak-proofing performance, and the leakage rate of SR/Pa@SiO2@PDA-2 is as low as 0.45%. Phase-change enthalpies of the Pa@SiO2@PDA microcapsules and SR/Pa@SiO2@PDA composites are reduced slightly with increasing DA content. Meanwhile, the composites displayed improved mechanical strength. The tensile strength of SR/Pa@SiO2@PDA-2 can be up to 0.560 MPa, which is 1.85 times higher than the tensile strength of pure SR/Pa@SiO2 because the interface compatibility between Pa@SiO2 microcapsules and SR is improved through hydrogen bonding between the abundant groups on the PDA surface and the matrix. Moreover, the rough surface of the PDA-modified microcapsules also enhances the interface interaction through physical “interlocking”. The new kind of SR/Pa@SiO2@PDA composite can be used for thermal management.
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高影响因子
Journal of Materials Chemistry B
·
2021
·Vol. 9
·期 7
·1846-1857
·
IF 6.331
Yiyao Pu,Yuda Zhu,Zi Qiao,Nini Xin,Suping Chen,Jing Sun,Rongrong Jin,Yu Nie,Hongsong Fan
Based on widely used photoacoustic imaging (PAI) and photothermal properties of polydopamine (PDA), a multifunctional Gd–PDA-Ce6@Gd-MOF (GPCG) nanosystem with a core–shell structure and strong imaging ability was constructed. Benefitting from the metal–organic framework (MOF) structure, GPCG nanoparticles (NPs) showed enhanced magnetic resonance imaging (MRI) ability with high relaxation rates (r1 = 13.72 mM−1 s−1 and r2 = 216.14 mM−1 s−1). The MRI effect of Gd ions combined with the PAI effect of PDA, giving GPCG NPs a dual-modal imaging ability. The core, mainly composed of PDA and photodynamic photosensitizer chlorin e6 (Ce6), achieved photothermal/photodynamic therapy (PTT/PDT) synergistic performance. Besides, to overcome the unexpected release of Ce6, the MOF shell realized pH-sensitive release and a high local concentration. Through in vivo studies, we concluded that GPCG NPs show a good inhibitory effect on tumor growth. In conclusion, we successfully obtained a GPCG theranostic nanoplatform and paved the way for subsequent design of imaging guided therapeutic nanostructures based on metal-doped PDA.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yibo Liu,Chao Jia,Han Zhang,Haiyang Wang,Pan Li,Luna Jia,Feng Wang,Pengfei Zhu,Hao Wang,Lu Yu,Feipeng Wang,Lingxiao Wang,Xin Zhang,You Sun,Bo Li
Particulate matter of 0.3 μm in diameter (PM0.3) poses a serious threat to the environment and human beings. Ultrathin and -light nanofibrous filters with excellent filtration properties can significantly prevent the detrimental effects of these particles. Here, we develop free-standing polyamide PA-66 ultrafine nanofiber papers for PM0.3 filtration using effective and scalable blow and electro-blow spinning techniques. The smallest average fiber diameter is 61.7 nm, which is 2–3 orders of magnitude smaller than that of conventional textiles. Poly(ethylene terephthalate) nonwovens are selected to fabricate free-standing nanofiber papers of various polymers, including polyamide, poly(methyl methacrylate), poly(vinylpyrrolidone), and poly(ethylene oxide) owing to the smooth surfaces of the nonwovens. This underlying principle can be used to create similar free-standing nanofiber papers from other commodity polymers in the future. Mechanisms of capturing particulate matter with different nanofiber morphologies are discussed. Salt and oil particulates are used to characterize the filtration properties. PA-66 papers are promising reusable filters owing to their mechanical particle-capture mechanism. The blow-spun PA-66 papers show filtration performance of 98.75% efficiency and a pressure drop of 125.44 Pa owing to the “slip” effect caused by the ultrasmall diameter. In the electro-blow spinning process, a supplementary voltage supply is conducive to separating nanofiber bundles into random-oriented nanofibers. Electro-blown spun papers possess an ultrahigh efficiency of 99.99% with a reduced areal density of 0.9 g m–2. These PA-66 papers can be used in a variety of applications, such as reusable personal protective equipment, industrial waste gas treatment, and central ventilation purification systems.
研究领域:
材料科学
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环境工程
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纳米技术
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过滤技术
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Qiong Wu,Jingfan Yan,Fumin Chu,Yanpeng Huang,Yuming Xu,Siyu Jia,Sen Yang
Simple wet chemical method was used to prepare Cu(OH) 2 nanowire-coated copper mesh (denoted as Cu(OH) 2 -CM). Following modification with phytic acid (PA) and polyethyleneimine (PEI), superhydrophilic/underwater superoleophobic copper mesh (denoted as Cu(OH) 2 /PA/PEI-CM) with excellent mechanical and chemical stability was obtained. The Cu(OH) 2 /PA/PEI-CM exhibited efficient separation for various oil/water mixtures. Importantly, Cu(OH) 2 /PA/PEI-CM shows superior anti-crude oil fouling properties. A 280-cycle test (with only four cleanings) using a 2 cm 2 Cu(OH) 2 /PA/PEI demonstrates a large separation capacity, long-term stability and self-cleaning performance of the mesh during the treatment of a 11.2 L crude oil/water mixture. These distinct advantages give the Cu(OH) 2 /PA/PEI-CM great potential for practical application in separating oil pollutants from water.
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Fan Wang,HuaQing Zhang,ChunLing Liu,Wen Bao,YaJuan Hu,Xieraili Maimaitiyiming
PVA-based conductive hydrogels have enormous potential for applications in wearable flexible electronic devices, but their low ionic conductivity and mechanical strength hinder their practical utility. To address this challenge, we propose a PVA-based incorporating metal salt and zwitterion. We use PA(phytic acid) and HPMC (hydroxypropyl methylcellulose) - compatible properties to prepare PSBMA 1 -PMAZ 1.5 interpenetrating conductive hydrogel with good electrical signal responsiveness, repeatability, compression resistance, and low hysteresis (≤11.68 %). The hydrogel-based flexible strain sensor has a wide detection range, high sensitivity (GF = 1.1 at 0 − 600 %), stable electrical signal response to variations in temperature and humidity, and human movement detection capabilities. The detection range of hydrogel - based supercapacitors is 25 °C - 40 °C, which indicates that the device assembled with activated carbon as the electrode has good capacitance characteristics, and the multifunctional characteristics of PSBMA 1 -PMAZ 1.5 hydrogels are poised to serve as a demonstration for a new generation of flexible electronic products.
研究领域:
材料科学
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生物医学工程
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Chaojie Bai,Yang Gao,Zuoqun Zhang,Longdou Tu,Dajian Cai,Zixuan Lv,Congjie Gao,Lixin Xue
It is an important initiative to reduce the building energy consumption using energy recovering ventilation (ERV) systems. The application of ERV systems is hindered by the low CO2 barrier performance of commercial total heat exchange membranes (THEMs) that lead to unsatisfactory indoor air refreshing rate, and there is an urgent need for THEMs that have improved CO2 barrier properties and effective energy recovery efficiencies. Here, we report the formation of novel ZIF/PA TFN THEMs based on ZIF-7-X nanoparticles (NPs) with “core–shell” structures and tunable particle sizes, formed from benzimidazole (BIM) ligands and BIM substituted by −NH2, −CH3, −C2H5, and −C3H7 functional groups. The NPs were mixed with pyr omellitic triformyl chloride (TMC) in the organic phase during the interface polymerization process to form ZIF/PA TFN membranes. The total heat exchange performance of ZIF/PA TFN membranes could be effectively modified by the type and quantity of ZIF-7-X NPs added. The CO2 barrier properties and water vapor permeability of ZIF/PA TFN membranes could be improved by the addition of optimal levels of ZIF-7-X NPs, showing low CO2 permeance of 7.76 GPU, high H2O permeance of 663.8 GPU, and excellent enthalpy exchange efficiency of 72.1%. This work provided an effective strategy for tuning not only the nanostructures of ZIF-7 fillers but also the CO2 barrier properties of the formed ZIF/PA TFN membranes.
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DESALINATION
·
2024
·
IF 8.3
Jialin Wei,Dinghe Yan,Zhiyuan Qiao,Jingwen Chu,Dawei Ji,Changfa Xiao,Chun Wang
It produces a large number of organic brine during the polymerization process of Kevlar®, which contains N-(1-Methyl-2-pyrrolidinone) (NMP) and high concentrations of CaCl 2 and NaCl. The wastewater will cause serious pollution of water and soil resources if discharged directly. The separation and recycling of inorganic salts have been an industrial difficulty. In this paper, based on the novel concept of green self-recycling, we used Poly ( p -phenylene terephthamide) (PPTA, resin of Kevlar®) ultrafiltration membrane as the substrate, composited the loose and curled polyelectrolyte multilayers (PEMs) as interlayers and formed a homogeneous polyamide separation layer through interfacial polymerization, from which we obtained the homogeneous reinforcement aramid composite nanofiltration (NF) membrane. The composite NF membranes with different interlayer numbers showed different advantages. For single-component brine, the retentions of PEMs-1/PA membrane were 93 % and 98.4 % for 10 g/L CaCl 2 and MgSO 4 respectively. For mixed brine of 20 g/L CaCl 2 and NaCl, the retentions of PEMs-3/PA membrane were 87.13 % and 1.05 % for CaCl 2 and NaCl respectively with the separation factor as high as 82.95. In the test of long-term service stability, PEMs-3/PA maintained stable performance in 4 cycles total of 160 h. And the permeance could almost fully recover after pure water backwash of only 0.5 h. In addition, the structural stability and anti-scaling performance of the PEMs-3/PA membrane were further verified in high-temperature brine. Surprisingly, the obtained PPTA NF membrane in this work could effectively treat the high-saline brine in the Kevlar® polymerization process and would have more promising prospects in the treatment of industrial wastewater of brine.
研究领域:
材料科学
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环境工程
·
化学工程
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DESALINATION
·
2023
·
IF 9.9
Qingyi Wang,Yongping Dong,Junmei Ma,Huimin Wang,Xuping Xue,Chaojie Bai,Mingjie Lin,Lingping Luo,Congjie Gao,Lixin Xue
Polyamide/polyethylene thin film composite (PA/PE-TFC) NF membranes were prepared from reverse-phase interface polymerization (RIP) for improved Mg(II)/Li(I) separation. RIP processes between 1,3,5-benzenetricarbonyl chloride (TMC) in bottom organic phase and piperazine (PIP) in upper aqueous phase were developed to form continuous and intact surface PA separation layers on PE porous substrates thinner than traditional polysulfone (PSF) based substrates. After activation with isopropyl alcohol (IPA), PA/PE-TFC-IPA NF membranes were formed, whose NF performance could be tuned by adjusting the preparation conditions. When TMC concentration was kept at 0.15 % w/v, RIP with low PIP concentration (0.025 wt%) yield PA/PE-TFC-IPA NF membranes with negatively charged surfaces , high Na 2 SO 4 rejection rate (95 % ± 3 %) and water permeance (13–19 L·m −2 ·h −1 ·bar −1 ). RIP with high PIP concentration (0.3 wt%) formed PA/PE-TFC-IPA NF membranes with less negative surfaces, high MgCl 2 rejection rate (94.3 ± 0.7 %), low water permeance (4.8 ± 0.3 L·m −2 ·h −1 ·bar −1 ), and high Mg(II)/Li(I) separation coefficient S Li/Mg (18 ± 1) for 1000 ppm LiCl and MgCl 2 mixed solution. PA/PE-TFC-IPA NF membranes also showed good long-term stability and improved anti-fouling performance for positively charged pollutants, bearing high potential for applications in the lithium extraction processes.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 14
·e53686
·
IF 3
Yanwei Zhang,Hong Wang,Yaru Liu,Baolong Niu,Wenfeng Li
Accurate measurement of hydrogen peroxide is of great significance in monitoring human diseases and environmental safety. At present, there are a variety of testing methods, among which the use of electrochemical sensors to accurately measure hydrogen peroxide has gradually become a research hotspot. In this article, phytic acid (PA) with dual functions of doping and cross-linking and HCl with strong ionization capacity was introduced as dopants to co-doping polyaniline, and polyaniline hydrogel with a three-dimensional network structure was prepared. The influence of the HCl/PA co-doping ratio on conductive polyaniline hydrogel (CPAniH) was explored. The synthesis process and mechanism of HCl/PA-CPAniH were analyzed and explained. In addition, the conductivity and mechanism of HCl/PA-CPAniH, as well as the hydrogel characteristics were characterized and studied. A new electrochemical sensor based on polyaniline hydrogel and silver nanoparticles was constructed to detect hydrogen peroxide. The sensor has a good linear relationship, a wide linear range, and a high-detection limit for H 2 O 2 . In addition, it also shows that HCl/PA-CPAniH is a good interface material for electrochemical sensors and has a certain application potential.
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DESALINATION
·
2021
·
IF 9.501
Chuanfeng Wang,Yingbo Chen,Xiaoyu Hu,Xianshe Feng
A polyamide/poly(vinylidene fluoride) composite hollow fiber membrane (HFM) was designed by in situ interfacial polymerization (IP) during the fiber spinning process. Using a piperazine aqueous solution as the bore fluid and a dual-bath coagulation, the PA outer layer was formed via IP of the PIP in the bore fluid and TMC in the second reactive bath during phase inversion process. Chemical structure, membrane morphology and surface property were characterized by using Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscope (XPS), scanning electron microscope (SEM), and zeta potential . The effects of several parameters involved in the membrane fabrication (e.g., piperazine concentration, bore fluid flow rate , residence time and heat treatment temperature) on the morphology and performance of resultant composite HFMs were investigated. The composite HFM showed a performance that is comparable favorably with conventional nanofiltration membranes in terms of showed water permeability (10.2 L/m 2 ·h·bar), high rejection to dyes (i.e., 100% for CR and EBT, 99.99% for RhB and MB , 98.3% for MO) and low salt rejections (NaCl 6.2%). Moreover, the newly developed composite HFM showed good stability and flux recovery with simple water rinsing for treatment of simulated textile wastewater . This work is expected to provide a new approach to designing composite HFMs for the treatment and reuse of textile wastewater.
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LANGMUIR
·
2025
·
IF 3.9
Longben Huo,Hui Feng,Jiwei Cui,Ying Zhu,Lingyun Zhu,Xin Jin,Xinyuan Zhu
Polyvinylidene fluoride (PVDF) latex nanoparticles serve as a versatile platform for surface modification due to their role as precursors in PVDF manufacturing. However, the strong chemical stability and poor compatibility of PVDF present significant challenges for effective surface modification. To address this, we developed a method that facilitates surface modification through chain entanglement. By employing monomer swelling emulsion polymerization, poly(meth)acrylate (PA) monomers are incorporated into PVDF nanoparticles and subsequently polymerized. Rheological properties and transmission electron microscopy mapping confirmed the chain entanglement between PVDF and PA, indicating a successful integration. This method is efficient, straightforward, and highly adaptable, making it well-suited for large-scale industrial production.
研究领域:
材料科学
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高分子化学
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纳米技术
·
化学工程
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高影响因子
Foods
·
2024
·
IF 4.7
Yiteng Qiao,Fengwei Tian,Leilei Yu,Jianxin Zhao,Qixiao Zhai,Wei Chen
The mechanism of metabolites produced by lactic acid bacteria in mediating microbial interactions has been difficult to ascertain. This study comparatively evaluated the antimicrobial effect of the novel bacterium Pediococcus acidilactici CCFM18 and explored the global chemical view of its interactions with indicator bacteria. P. acidilactici CCFM18 had sufficiently strong antimicrobial activity to effectively inhibit the growth of the indicator bacteria and enhance their intracellular reactive oxygen species (ROS) level. The emerging technique of matrix-assisted laser desorption ionization–time-of-flight (MALDI-TOF) imaging mass spectrometry indicated that P. acidilactici CCFM18 increased the production of pediocin PA-1 and the penocin A profile during its interaction with the indicator bacteria, thus differing from P. acidilactici CCFM28 (a commonly used laboratory strain). Strikingly, the production of coagulin A was triggered only by signaling molecules made by the competing strain L. thermophilus , suggesting an idiosyncratic response from P. acidilactici CCFM18. Bioinformatic mining of the P. acidilactici CCFM18 draft genome sequence revealed gene loci that code for the complex secondary metabolites analyzed via MSI. Taken together, these results illustrate that chemical interactions between P. acidilactici CCFM18 and indicator bacteria exhibit high complexity and specificity and can drive P. acidilactici CCFM18 to produce different secondary metabolites.
研究领域:
微生物学
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基因组学
·
质谱分析
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高影响因子
危险品化学品经营许可证（带存储）