MATERIALS LETTERS
·
2019
·
IF 3.019
Sufeng Zhang,Nan Zhang,Liwei Qian,Ye Liu,Huijun Ren,Yongwei Li
A facile and rapid method was developed for preparing aerogel from polysulfonamide (PSA) via sol-gel process. Through hydrogen bond fracture and regeneration between PSA molecules in the solvents of dimethyl sulfoxide (DMSO) and tetra-n-butylammonium fluoride (TBAF), a three-dimensional network structure of PSA aerogel is formed. The obtained PSA aerogel shows high compression strength of 3.25 MPa, and also exhibits the density of 0.06 g/cm 3 and the porosity of 88%, respectively. Moreover, the water contact angle of the PSA aerogel surface is 95°, which suggests good water resistance and dimensional stability for application in oil and water separation, filtration and other fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jiandong Wang,Yuxing Jiang,Zhuangzhuang Tian,Jun Li,Yang Jin,Jianjun Chen,Yubin Wang
The traditional wet-process phosphoric acid has higher economic benefits than the thermal-process phosphoric acid, but introduces many metal ion impurities, which limits the application of phosphoric acid. In highly concentrated phosphoric acid solutions, phosphoric acid mainly exists in molecular form. Due to the surface charge and appropriate pore size of the nanofiltration (NF) membrane, it exhibits high selectivity for phosphoric acid and its impurities. However, because of the uncontrolled diffusion of monomers and rapid polymerization, the pore size distribution becomes highly uneven. Meanwhile the extremely low pH and high viscosity of the phosphoric acid compromise the stability and permeance of commercial membranes. We identified that the organic monomer benzene-1,3-disulfonyl chloride (BDSC) exhibits a capping effect when reacting with the aqueous phase of branched polyethyleneimine (PEI) which allows the newly formed membrane to regulate the subsequent diffusion and reaction of hexamethylene diisocyanate (HDI), thereby optimizing the membrane structure. By adjusting the concentration of BDSC, the pore size of the membrane layer was optimized. The final average pore size was determined to be 0.33 nm. The membrane exhibited an average ion rejection of over 65 % when tested in a 20 wt% P 2 O 5 solution, while maintaining a very low rejection rate of only 1.74 % for phosphorus. The permeance reached 1.21 L/h m 2 bar, surpassing that of traditional commercial membrane operating at less than 1 L/h m 2 bar under 10 wt% P 2 O 5 conditions. This study employed the capping effect to adjust the membrane structure and pore size, demonstrating that spatial sieving is the main mechanism for ions purification in phosphoric acid. Long-term acid resistance tests confirmed the stability of the poly (sulfonamide-urea) NF membrane during phosphoric acid purification process. This work shows that this new nanofiltration membrane exhibits promising prospects for application within acidic high-viscosity systems.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2020
·
IF 4.915
Andong Zhang,Heping Li,Aohua Zhang,Jun Zhou,Youwei Yan
Polymer nanofibers have a great potential in PM 2.5 filtration, but they generally cannot remove particulate matter (PM) particles directly from high-temperature sources due to their vulnerable structure. Polysulfonamide (PSA)/polyacrylonitrile (PAN) composite nanofibers that can withstand a temperature up to 400 °C, were fabricated by a simple electrospinning method. The interactions between PSA and PAN defined the resulting microarchitecture and shape of the nanofibers when suffering heating. The PSA/PAN composite nanofibers exhibited above 99.7% removal efficiency for the PM 2.5 . More importantly, such a high PM 2.5 removal efficiency was well retained even after heating the nanofibers at temperatures ranging between 100 °C and 400 °C. The nanofiber air filter could continuously work for 100 h in an environment with the concentration of PM 2.5 approaching 380 μg/m 3 . The good thermal stability and high filtration efficiency of PSA/PAN nanofibers make them attractive in various applications, especially when high-temperature bearable polymer components are needed.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Wei Lai,Lu Liu,Ju Bai,Luqi Xiao,Yang Jiao,Youming Yang,Linglong Shan,Shuangjiang Luo
The fabrication of highly acid-resistant nanofiltration (NF) membranes with excellent separation performance via interfacial polymerization remains challenging due to the lack of precise pore architecture manipulation. Herein, novel acid-resistant nanofiltration membranes were fabricated based on benzene-1,3,5-trisulfonyl chloride (BTSC), which holds the characteristic resonant π-backbonding structure and high steric hindrance, by interfacial polymerizing with polyethyleneimine (PEI) and piperazine (PIP) on the polyethersulfone (PES) substrate. The as-prepared PIP-BTSC/PES and PEI-BTSC/PES membranes displayed sub-nanometer pore sizes of 0.62 and 0.65 nm, respectively, with much narrower pore size distribution than the conventional acid-resistant NF membranes. Notably, the PEI-BTSC-H/PES membrane exhibited an MgCl 2 rejection of 95.5 % and a high permeance of 43.5 L h -1 m −2 bar −1 . Besides, the PEI-BTSC/PES membrane exhibited excellent acid-resistance in the 72-day static acid soaking test and dynamic acid permeation experiment. Density functional theory calculation revealed that the outstanding acid-resistance of BTSC was ascribed to the much higher hydrolyzation energy barrier of the polysulfonamide than conventional polyamide.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Xue Yang,Yi Pu,Shuxia Li,Xiaofang Liu,Zheshan Wang,Ding Yuan,Xin Ning
To address the challenge of high-temperature air filtration, a novel electreted polysulfonamide/polyacrylonitrile-boehmite (PSA/PAN-B) composite nanofiber based filter was developed via electrospinning for effective high-temperature dust removal. In this study, the spinnability of PSA was greatly improved by adding a small amount of PAN as an auxiliary polymer, and the introduction of a boehmite electret further significantly reinforced the properties of PSA fibers. As a result, the PSA/PAN-B membrane exhibited a high filtration efficiency (up to 99.52 ± 0.32%), low pressure drop (45.16 ± 1.39 Pa), excellent flexibility, good mechanical properties, high thermal stability (up to approximately 300 °C), and superior chemical resistance. Through data analysis and 3D simulation, the important benefits of the boehmite electret in the optimization of the PSA fibrous membrane performance were determined: it increases the charge storage capacity, constructs a rough surface morphology, improves the specific surface area, and enhances the mechanical properties. More importantly, the PSA/PAN-B film possessed a robust PM2.5 purification capacity, and the particulate matter removal efficiency was kept unchanged after high-temperature, acid, or alkali treatment—a performance derived from the intrinsic molecular structure of PSA. The PSA/PAN-B composite fibrous membrane, with excellent comprehensive properties, is a promising candidate for air filters, especially in harsh environments, further broadening the applications of PSA and providing new insight into the design of high-performance filters with high-temperature and corrosion resistance.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Zhimei Wei,Zhefu Wu,Qing Su,Chuanren Zhu,Hongye Zeng,Xiaojun Wang,Shengru Long,Jie Yang
Particulate matter 2.5 (PM 2.5 ) pollution has severely affected human health. It is urgent and essential to remove PM 2.5 from sources of pollution. However, filtration at the source of pollution remains challenging because most filters are not resistant to high temperature. Therefore, a polysulfonamide with novel molecular structure nanofiber filter in this work was developed by electrospinning technology for high-efficient air filtration. The polysulfonamide with m-phenyl substituted segments was successfully synthesized by the results of 1H NMR spectroscopy and fourier transform infrared spectroscopy. Moreover, the polysulfonamide nanofiber filters (PNFs) demonstrated excellent mechanical strength (7.2 MPa), high filtration efficiency (99.5 %), low pressure drop (111 Pa) for PM 2.5 filter, significant thermal stability (300 °C), and excellent flame retardancy. Furthermore, the PNFs with beaded-structure had a lower pressure drop (59 Pa) because the microspheres increased the distance between the fibers. Therefore, the PNFs will have great potential in the fields of high-temperature exhaust gas filtration, water purification, and protein separation.
研究领域:
材料科学
·
环境科学
·
医学
✓ 已验证
DOI
高影响因子
ACS Applied Bio Materials
·
2019
·
IF 0
Fei Wang,Mei Liu,Ruida Ding,Mingguang Liang,Liqian Huang,Jianyong Yu,Yang Si
Bioprotective materials with bactericidal activity could largely protect healthcare workers from being infected by emerging infectious diseases; however, creating such materials has turned out to be extremely challenging. Here, we fabricate a novel polysulfonamide (PSA) N-halamine electrospun nanofibrous membrane with rechargeable and rapid bactericidal properties by a Lewis acid-assisted chlorination process. The hydrogen bonds between PSA molecular chains can be weakened through Lewis acid–base complexation during chlorination, enabling more available amide groups to be chlorinated into N-halamine biocidal groups. The resulting nanofibrous membranes render intriguing features such as rechargeable chlorination capability (>4500 ppm), rapid bactericidal activity (6 log reduction of bacteria in 1 min), high particle removal efficiency (>99.8%), long-term durability, and ease of scalable production, which can be perceived as a functional layer of protective equipment that is capable of not only intercepting but also inactivating the pathogens effectively. The successful synthesis of the PSA N-halamine antibacterial nanomaterials opens new ways toward the development of bioprotective materials in a multifunctional and rechargeable form.
研究领域:
生物医学工程
·
材料科学
·
传染病防护
✓ 已验证
产品关联
DOI
PubMed
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Wei Lai,Linglong Shan,Ju Bai,Luqi Xiao,Lu Liu,Shunli Wang,Lili Gong,Yang Jiao,Wei Xie,Hongyan Liu,Shuangjiang Luo,Suojiang Zhang
The fabrication of nanofiltration (NF) membranes with excellent acid resistance and high separation performance remains a tremendous challenge due to the lack of precise membrane structure manipulation. Herein, covalent organic frameworks (COFs), due to their abundant porosity and highly ordered structures, are employed to synthesize high-permeation nanofiltration membranes. An acid-stable COF layer and a polysulfonamide (PSA) layer were fabricated by in-situ interfacial polymerization (IP) upon the polyethersulfone (PES) ultrafiltration substrate in turns. The acquired COF-based composite membrane exhibited sub-nanometer pore size and excellent rare-earth ions separation performance due to the interlaced stacking between the COF and PSA layers, as well as the COF interlayer regulated IP process. Additionally, the composite membrane showed high rejection of >92.2% for trivalent rare-earth ions (RE 3+ ) and high water permeance of >43.3 L h −1 m −2 bar −1 at both pH = 6.8 and pH = 1, the superior separation performance can be ascribed to the high porosity and abundant transportation pathway provided by the COF layer and the interlaced stacking structure between the COF layer and the PSA layer. The facile membrane fabrication procedure, along with the excellent water permeation performance and acid resistance, render the composite membrane in this study applicable for a broad range of critical industrial and environmental processes.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 16
·4135
·
IF 3.1
Zijia Wang,Yawen Chang,Siyang Jia,Fujuan Liu
In this study, polyimide (PI) and polysulfonamide (PSA) were used as base materials, and polyethylene glycol (PEG) was added to successfully prepare PI/PSA/PEG nanofiber membranes through electrospinning technology. Subsequently, water etching was performed on the membranes, utilizing the water solubility of PEG to form the rough wrinkled structure, further enhancing the surface hydrophobicity. The experimental results showed that under the conditions of a spinning voltage of 10 kV, PI/PSA mass fraction of 15 wt.%, and PEG-to-PI/PSA mass ratio of 1/3, the obtained fiber membranes exhibit a uniform morphology (an average diameter of 0.73 µm) and excellent hydrophobicity (the initial water contact angle (WCA) reaching 130.4°). After PEG water etching, the surface of the PI/PSA/PEG hydrophobic membranes formed the rough wrinkled structure, which not only improved their mechanical properties but also further enhanced their hydrophobicity (the initial WCA increasing to 137.9°). Hence, fiber membranes are expected to have broad application prospects in fields such as waterproofing and moisture permeability.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2020
·
IF 0
Heyun Wang,Hao Wang,Haoji Jiang,Ao Sheng,Zhong Wei,Yingchun Li,Chunlin Wu,Hao Li
Although covalent organic frameworks (COFs) have attracted extensive attention in recent years due to their unique advantages, the use of triazine-structured COFs in the nanofiltration (NF) membrane separation processes for acid wastewater containing heavy metal ions has not been explored. We selected hydrophilic triazine-structured COF nanosheets (NENP-1) that were added to a polysulfonamide (PSA) layer via interfacial polymerization to fabricate nanocomposite membranes (NENP-1-PSA/PES). The NENP-1 brings about the synergy of improved hydrophilicity and positive charge ability with suitable pore sizes that facilitate high permeation for water molecules and high rejection for inorganic salts. Meanwhile, the NENP-1 was covalently linked to PSA matrix with better interface compatibility and membrane stability. The water flux and MgCl2 rejection of the membrane increased up to 15.1 L/m2·h·bar and 93.3%, respectively, after adding only 0.1 w/v% NENP-1, which corresponded to increases of 149.6% and 4.6% compared to the pristine PSA membrane. In addition, the membrane also exhibited good stability in acid condition. This study paves the way for the development of membrane materials with the excellent separation performances in desalination and acidic environments.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
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
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 42
·14641-14651
·
IF 6.4
Ziwen Wang,Zhen Qin,Biao Zhao,Han Zhu,Kai Pan
With the rapid development of artificial intelligence, the study of flexible pressure sensors has attracted great attention from researchers. However, in the face of extreme application environments such as aerospace and national defense, higher requirements are put forward for flexible pressure-sensing active materials. In this study, a novel electrospun polysulfonamide and polyacrylonitrile (PSAN) nanofiber-reinforced three-dimensional (3D) reduced graphene oxide aerogel (GA) is designed and fabricated. The pore wall of the aerogel has a leaf-like structure, the internal micropore has a “layer-pillar” structure, and the compression strength is as high as 26.07 kPa. The assembled piezoresistive sensor has a wide detection range (24.97 kPa), high sensitivity (32.85 kPa−1), and an extensive operating temperature range (−60 to 200 °C). It features a rapid response time of 300 ms at low pressure, excellent structural stability, and a sensing durability of over 3500 compression cycles. Moreover, the piezoresistive sensor can track the physiological and activity signals of the throat, face, fingers, elbows, knee joints, and other parts of the human body in real time, and has a stable sensing performance at ultra-low and high temperatures. These excellent sensing properties indicate that the GA aerogel has great application potential as a high-performance flexible piezoresistive active material in extreme environments.
研究领域:
材料科学
·
纳米技术
·
传感器
·
可穿戴技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）