SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Xuewu Zhu,Zhongyue Sun,Fengxun Tan,Jianjun Zhu,Feiyong Chen,Sisi Xu,Daoji Wu,Daliang Xu,Heng Liang,Xiaoxiang Cheng
Polyester (PE) membranes with outstanding permeance and efficient dye desalination performance have become ideal for resource recovery from dye wastewater. However, further improving the performance of PE membranes remains challenging. Herein, a novel high-performance PE loose nanofiltration (LNF) membrane was fabricated via interfacial polymerization, in which nontoxic, rich in hydroxyl, large size, inexpensive, low reactivity, and biodegradable xylitol (XL) was utilized to fabricate PE films. The newly formed XL-based membrane had a hydrophilic, negatively charged, smooth, loose, and thin selective layer. The membrane was optimized by controlling the XL concentrations in the aqueous phase (0.5–2.5 wt%). The optimized membrane (XL-1.5/TMC) exhibited unprecedented water permeance (97.6 L m −2 h −1 bar −1 ) and satisfactory dye desalination performance (Congo red/Na 2 SO 4 selectivity of 259). In addition, the XL-1.5/TMC membrane showed outstanding antifouling performance and stability, which showed great potential for the large-scale application of XL-based membranes. Therefore, this new strategy for the fabrication of PE LNF membranes featuring superior performance using XL was proposed to facilitate resource recovery from dye wastewater.
研究领域:
材料科学
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环境工程
·
化学工程
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Xiaoling Xu,Bin Peng,Yanqiu Wang,Yaqi Dong,Hui Wang,Wentong Chen,Yan Liu,Qiang Zhang
The incorporation of polyhedral oligomeric sesquisiloxane (POSS), a distinctive nanoparticle, into the membrane separation layer represents an effective strategy for enhancing the chlorine resistance of membranes. This modification contributes to both the durability of the membrane and its separation efficiency. However, POSS is easy to agglomerate, which affects the separation performance of the membrane. In this paper, POSS-centered polyhydroxy polymer (OMEPOSS-P(GMA-NMDG)) was synthesized via photo-induced atom transfer radical polymerization and used as water-soluble monomer to prepare polyester separation layer on porous substrates through interfacial polymerization with trimelanoyl chloride. The obtained POSS-centered polyester membrane exhibits a high dye removal rate exceeding 99 %, and it can realize the screening of dye molecules with different molecular weight and different charge. Notably, the membrane demonstrates excellent chlorine resistance, maintaining effective separation efficiency after exposure to sodium hypochlorite solutions at concentrations of 10 000 ppm for 96 h and 1000 ppm for 7 days. It is worth noting that the membrane showed high anti-fouling performance. This method provides a useful guideline for the development of chlorine-resistant and anti-fouling separation membranes.
研究领域:
材料科学
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分离技术
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环境工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Meng-Meng Tang,Xiao-Gang Jin,Xin Tang,Miao Yu,Xiao-Hua Ma,Zhen-Liang Xu
Dye wastewater poses a severe danger to the environment and human health. The purification of dye wastewater is the focus and hotspot of most researchers. In this work, ethylene glycol (EG) was selected as an aqueous phase monomer to fabricate polyester membranes through an interfacial polymerization reaction. Then the polyester membrane was activated by ethanol aqueous solution. By adjusting the activation time and concentration of the ethanol, the network of the polyester membrane can be reshaped to endow the membrane with excellent performance. The activation mechanism was also explored here. Compared to the membrane without activation (PE-0%), the permeability of the optimized membrane (PE-40%) was increased by 8.3 times, and a high rejection was maintained (CR: 99.2%). Importantly, the PE-40% membrane also presented good acid and alkali resistance, chlorine resistance, and excellent antifouling performance. Our work provides an effective and feasible strategy for the development of high-performance polyester membranes.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
DESALINATION
·
2022
·
IF 11.211
Quan Hu,Dongsheng Li,Suilin Liu,Guangming Yan,Jie Yang,Gang Zhang
To meet separation need under various conditions, a great variety of membranes have been fabricated via interfacial polymerization (IP), especially for the polyester membranes with intrinsic micro-porosity. However, the aqueous phase used for making those polyester membranes often requires alkaline environment , resulting in a quite different procedure compared with conventional polyamide membranes, which may alter IP process that have been widely studied. Here, the KOH, NaOH and LiOH were used respectively to create alkaline environment whereby the impact of alkali on polyester membranes were investigated systematically. It was found that the alkali not only showed influence on the IP process, but it also affected diffusion of monomers in aqueous phase across the water/hexane interface. When the concentration of alkali or pH of the aqueous phase were the same, the membranes using KOH as base were found to have the lowest permeability while the membranes using NaOH showed the highest permeability, and the membranes using LiOH showed the moderate permeability. The mechanism of the permeance trend was further investigated in detail, and it was found that the monomer containing hydroxyl not only could act as IP monomers, but also could play role as surfactant, thus affected its own diffusion to organic phase. This study paves the way for a wider integration of these macrocyclic polyphenols in the field of high-performance nanofiltration (NF) membranes, and also offers a new approach to optimize the performance of NF membranes based on polyester.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
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IF 7.2
Changzhe Zhou,Haojie Li,Longlong Wang,Tao Fu,Guangli Liu,Xiaoran Shen,Huazhang Zhao
Polyester membranes are increasingly utilized in wastewater treatment due to their chlorine resistance. Nonetheless, they face challenges such as limited permeability. The integration of covalent organic frameworks (COFs) can significantly enhance the performance of nanofiltration membranes. However, the heterogeneous dispersion of COFs in solution results in poor compatibility with polyester membranes, leading to increased membrane defects and compromising nanofiltration performance. This study presents the development of COFs-polyester hybrid membranes via a simple one-step in-situ co-polymerization method. During the interfacial polymerization (IP), p-phenylenediamine (Pa) and 1,3,5-triformylphloroglucinol (Tp) were integrated into a β-cyclodextrin (β-CD) aqueous solution and a trimesoyl chloride (TMC) organic solution, respectively. The uniform dispersion of COFs monomers within the IP monomer solution addressed heterogeneity issues, improving compatibility with polyester membranes. The in-situ co-polymerized COFs not only enhanced the sieving capabilities but also improved the hydrophilicity, and free volume of the membranes. The optimized membranes demonstrated a permeance of 105 L/m 2 ·h·bar, with rejection rates of 98.5 % for Congo red and 6 % for Na 2 SO 4 . Moreover, these membranes exhibited remarkable resistance to chlorine, organic solvents, and antifouling capabilities. This study offers novel insights into the application of COFs in polyester membranes, providing a straightforward, cost-effective, and scalable integration strategy.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
Journal of Water Process Engineering
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2023
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IF 7
Xiaolei Wang,Shurui Han,Yaxian Xue,Bing Zhang,Huan Zhang,Huicai Wang,Jing Feng,Junfu Wei
Polyester nanofiltration membranes with a loose selective layer are highly promising for separating dyes and salts. In this study, three anti-fouling polyester nanofiltration membranes were prepared by interfacial polymerization of xylitol (E967), xylitol/β-cyclodextrin (E967/β-CD), and xylitol/sodium alginate (E967/SA) with trimesoyl chloride on a polyethersulfone (PES) substrate. The chemical structure, morphology, pore size, hydrophilicity and zeta potential of three polyester membranes were characterized. The preparation conditions, separation performance for dyes and salts, and anti-fouling properties were studied. The results indicated that the addition of β-CD or SA inhibited the esterification reaction, resulting in a thin and loose polyester layer. The polyester layer thicknesses of the PES/E967/β-CD and PES/E967/SA membranes were 92 nm and 79 nm, respectively. In addition, the hydrophilicity and electronegativity of the polyester layer were enhanced. Three polyester membranes all showed a rejection of >99.5 % for Congo red. The permeance of the PES/E967/β-CD membrane was the highest (18.3 L·m −2 ·h −1 ·bar −1 ), whereas the NaCl rejection of the PES/E967/SA membrane was the lowest (9.1 %). Compared with the PES/E967 membrane, the fouled PES/E967/β-CD and PES/E967/SA membranes had longer wash cycles, suggesting an advantage in dye/salt separation.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
DESALINATION
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2023
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IF 9.9
Kaiming Fan,Chunwen Pan,Yanling Liu,Xu Yuan,Xiaoping Wang,Yidi Huang,Peng Cheng,Shengji Xia
Due to the relatively low reactivity of hydroxyls with acyl chloride groups, the synthesized polyester (PE) membranes commonly have loose structures, only capable of removing large-molecule organics with low rejection of inorganic salts. In this study, the pore size reduction of the synthesized PE membrane was successfully achieved by optimizing the interfacial polymerization (IP) reaction between erythritol and trimesoyl chloride (TMC). The optimized membrane was able to maintain a high xylose rejection (∼60 %) and acceptable water permeance (7.85 L m −2 h −1 bar −1 ), which was suitable for drinking water treatment . Through comprehensive characterizations, a two-stage membrane formation process was demonstrated regarding the reaction between aqueous monomers with different reactive functional groups and TMC. The highly reactive primary hydroxyls more preferentially participated in the initial reaction stage, leading to a linear cross-linking pattern of polyester. When the molecular diffusion was inhibited, the participation of secondary hydroxyls made the reaction proceed toward partial or full cross-linking. The distinct roles of the two kinds of hydroxyl groups were further verified by the energy barrier differences obtained by density functional theory (DFT) calculation. The exploration of membrane-optimized preparation and formation mechanisms can promote the structural regulation and tailored synthesis of PE membranes for various applications.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Li Ding,Yangzheng Huang,Le Shi,Youcai Chen,Dandan Cheng,Haoyu Zhan,Shao-Lu Li,Chunrui Wu
Loose nanofiltration (LNF) membranes prepared by hydroxyl monomers with good dye rejection and inorganic salt permeation properties have attracted significant attention for treating salt-containing textile wastewater. This study adopted interfacial polymerization (IP) method to fabricate a novel polyester LNF membrane, in which tris (4-hydroxyphenyl) phosphine oxide (THPPO) with a steric structure was employed as the solely aqueous monomer. To enhance the solubility and esterification reaction activity of THPPO, sodium hydroxide (NaOH) was specially adopted in aqueous phase, helping the development of the polyester selective layer. The findings demonstrated that the prepared ultrathin (30–38 nm) polyester selective layer exhibited a smooth surface with a negative charge. The optimal membrane LNF-0.05 exhibited a good water permeance of 20.8 L m −2 h −1 bar −1 , excellent rejection of anionic dyes (99.6 % for EBT, 99.3 % for CR, 98.8 % for DR 23, and 98.1 % for MB), and low rejection of monovalent salts (8.2 % for NaCl, 5.0 % for MgCl 2 ), showing excellent EBT/NaCl mixture selectivity as high as 221. The performance stability of the membranes was partially testified by continuous filtration process. These results confirm the significant application potential of tris-phenol phosphine oxide-based polyester LNF membrane for treating saline textile wastewater.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Rui Li,Zhaohuan Mai,Donglai Peng,Shuainan Xu,Jing Wang,Junyong Zhu,Yatao Zhang
Porous organic polymers (POPs) hold considerable promise for developing porous membranes with fast and efficient molecular separation because of their well-structured pores, robust organic backbone, and adjustable chemical functionalities. However, preparing membranes from POPs via conventional solvent casting method is difficult because of the insolubility of the majority of POPs in most solvents. Here, for the first time, polyester membranes were in situ fabricated using hydroxyl-containing POP on a porous substrate via interfacial polymerization. The abundant hydroxyl groups within POP enabled them to be crosslinked with trimesoyl chloride (TMC) at the water/hexane interface at a mild temperature (40°C), thus forming a defect-free, continuous active layer. The superb intrinsic porosity of POP as well as their hydrophilic nature promoted a high water permeability of 31.28 L m −2 h −1 bar −1 . Importantly, the as-fabricated polyester membranes exhibited high dye rejection (>95%), low salt retention (25.53% for Na 2 SO 4 ), rendering them highly competitive for dye/salt fractionation. Notably, the membranes demonstrated good chlorine resistance and antifouling properties. This facile and cost-effective approach provides a useful guideline for assembling POP into continuous membranes with great potential for textile effluent treatment.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
JOURNAL OF CONTROLLED RELEASE
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2021
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IF 9.776
Jin Zhang,Chunsheng Xiao,Xi Zhang,Yandai Lin,Huanghao Yang,Yu Shrike Zhang,Jianxun Ding
ABSTRACT Peritendinous adhesion, secondary to the repair surgery of tendon rupture or injury, is one of the most common causes of reoperation, owing to the proliferation of fibrous tissue and excessive collagen synthesis caused by the residing inflammatory cells. In this study, a smart oxidative stress-responsive electrospun polyester membrane (EPM) was fabricated as both physical barrier and reservoir of curcumin/celecoxib (CUR/CEL) to prevent peritendinous adhesion. The multicomponent EPM was designed to release the encapsulated drugs in response to oxidative stress of the local microenvironment induced by inflammation. Specifically, sulfides in the EPM were able to react with reactive oxygen species (ROS) and become hydrophilic sulfoxide or sulfone to accelerate the release rate of drugs and regulate oxidative stress level in the inflammatory site intelligently. The oxidation-sensitive multicomponent EPM loaded with CUR and CEL was tested for anti-adhesion capacity in vitro and in vivo . An excellent ROS-sensitive degradation behavior and good cytocompatibility with cell viability of above 85% were presented with the fabricated EPM. The CUR- or CEL-loaded EPM possessed a better anti-adhesion ability compared with EPM without the drugs. Nevertheless, they were inferior to the EPM simultaneously loaded with both drugs, where the adhesion rate and fibrous adhesion number in the EPM+CUR/CEL group were close to extremely low values of about zero, demonstrating that CUR and CEL could synergistically prevent peritendinous adhesion. More interestingly, the multicomponent EPM was able to react with the local oxidative stress, leading to a smart and sustained behavior of releasing approximately 80% of the drug within 20 days. Overall, the smart multicomponent EPM offers a promising barrier strategy to prevent peritendinous adhesion.
研究领域:
生物医学工程
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药理学
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组织工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2023
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IF 9.5
Wenjing Tang,Bojun Li,Huaqing Liu,Ting Liang,Pei Li,Changwei Zhao,Xiang Li,Shaomin Liu
Possessing high chlorine resistance is an important consideration for membranes to be applied for water treatment. In this study, the superior chlorine resistant β-cyclodextrin (β-CD) based polyester membranes were developed via interfacial polymerization (IP) with the β-CD and glycerol or mannitol as the aqueous phase monomers. By adjusting the compositions of the aqueous phase, the pore size and distribution of the resultant membranes were accurately controlled, thus improving the separation efficiency of the membranes. The optimized membrane (β-CD/Ma 3 ) had the higher water flux (60.4 L‧m -2 ‧h -1 at 2.0 bar) and Na 2 SO 4 retention (95.6%). After immersed in 10 ppm sodium hypochlorite (NaClO) solution for 360 h, the membrane performance in terms of water flux and salt retention was almost unaltered, mirroring a good long-term stability. In another test, the Na 2 SO 4 retention of membrane remained at 91.7%, which was only 4.1% lower than the original value, after exposure to a high concentrated NaClO solution (2000 ppm) for 72 h. Fouling cycling test was also performed, and the flux was maintained as high as 97.2% of the original value after examination of three cycles. All these observations clearly indicate that the optimized membrane has outstanding chlorine resistance and superior antifouling property.
研究领域:
材料科学
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环境工程
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水处理
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产品关联
DOI
高影响因子
Science China-Chemistry
·
2015
·Vol. 58
·期 7
·1159-1168
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IF 1.695
Song Zhiming,Shi Bo,Ding Jianxun,Zhuang Xiuli,Zhang Xiaonan,Fu Changfeng,Chen Xuesi
Complications arising from tendon injury include tendon sheath infection and peritendinous adhesion, in which tendon adhesion often leads to serious motor dysfunction. In this work, the electrospun membranes of poly( L -lactide) (PLA) and poly(ε-caprolactone) (PCL) with different degradation kinetics were used to investigate their efficacy for anti-adhesion toward Achilles tendon repair. Compared with the PCL membrane, the PLA sample showed a faster rate of degradation in 42 d, and all the degradation media (i.e., phosphate-buffered saline) maintained at a constant pH of around 7.4. Meanwhile, the superior biocompatibility of both the PLA and PCL membranes were proved by the in vitro cellular adhesion tests and in vivo histopathological assays. Simultaneously, the PLA membrane was more effective than the PCL sample in decreasing adhesion and promoting functional recovery. Furthermore, the experiment result was further confirmed by hematoxylin-eosin and Masson’s trichrome staining, and type I collagen immunohistochemical analysis. All results revealed that the model treated with the electrospun PLA membrane was obviously better with regard to both anti-adhesion and tendon repair than that in the PCL membrane group. Considering the results of degradation and adhesion prevention efficacy, the electrospun polyester membranes, especially the PLA one, would be applied with fascinating potential in clinical prevention of postoperative tendon adhesion.
研究领域:
生物材料
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组织工程
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骨科手术
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生物医学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）