Article
Engineering, Chemical
Chuanjie Fang, Wenyi Liu, Pengfei Zhang, Saeid Rajabzadeh, Noriaki Kato, Yuji Sasaki, Ho Kyong Shon, Hideto Matsuyama
Summary: PVDF hollow fiber membranes were developed for membrane distillation (MD) using the thermally induced phase separation (TIPS) process with solvent co-extrusion. The membranes exhibited high water vapor permeability and excellent wetting resistance due to the unique surface structures achieved through solvent co-extrusion. This one-step fabrication process allowed for the creation of various surface morphologies and provided a new, simple, and effective alternative for high-performance MD desalination membranes.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Murong Yang, Haihui Liu, Kaikai Chen, Mianning Wang, Huanhuan Chen, Wei Zhao, Changfa Xiao
Summary: Membrane separation technology is widely used in various fields, especially in water treatment. A study focuses on the preparation of PVDF hollow fiber composite membranes through a green preparation method. The addition of PEO promotes phase separation and improves membrane performance. The prepared membrane shows high water flux, excellent protein rejection, and strong mechanical properties.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Materials Science, Multidisciplinary
Xiao Kong, Xiaolong Lu, Juanjuan Liu, Chunrui Wu, Shaozhe Zhang
Summary: Increasing the surfactant surface activity has been found to improve the water flux of polymer hollow fiber membranes significantly, leading to a great increase in the efficiency of ultrafiltration and direct contact membrane distillation. This method, different from conventional approaches, enhances the surface porosity and optimizes pore size distribution without compromising membrane mechanical strength.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2021)
Article
Engineering, Chemical
Xuhui Hu, Xing Chen, Mattia Giagnorio, Chunhong Wu, Yunbai Luo, Claus Helix-Nielsen, Ping Yu, Wenjing Zhang
Summary: A new class of PVDF-based membranes suitable for membrane distillation was prepared via electrospinning. By tuning the solvent ratio and operating parameters, the classical fiber morphology of PVDF electrospun membranes was changed to generate a beaded structure. Increasing the bead density improved the water contact angle and reduced the membrane thickness, but decreased the membrane mechanical stability. Simultaneous deployment of 17 and 25 wt% of PVDF solutions in a double-needle electrospinning device enabled the fabrication of electrospun PVDF-beaded membranes with high hydrophobicity, low thickness, and good mechanical stability for membrane distillation.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Sie Hao Ding, Pei Ching Oh, Asif Jamil
Summary: In this study, PVDF HFMs were prepared by manipulating air gap intervals during spinning. The results showed that increasing the air gap distance can reduce inner lumen defects, improve CO2 gas permeance and CO2/CH4 ideal selectivity. Therefore, varying the air gap distance is considered a practical approach for better gas separation performance.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Review
Engineering, Chemical
Yuanhui Tang, Yakai Lin, Wenzhong Ma, Xiaolin Wang
Summary: Remarkable success has been achieved in the fabrication and industrialization of PVDF membranes via TIPS method for microfiltration/ultrafiltration applications in water treatment. This article provides a comprehensive overview of the fabrication and development of PVDF microporous membranes, highlighting the advantages of the TIPS method and introducing emerging advanced techniques for commercialization.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Jian Pan, Wenyi Ma, Lilan Huang, Ruzhe Li, Qinglin Huang, Changfa Xiao, Zhaohui Jiang
Summary: The ECTFE hollow fiber membranes prepared with the L-TIPS method and the addition of composite powder exhibit superior properties, including a thinner dense skin layer, bicontinuous microporous structure, and good porosity and mechanical performance. These membranes also show excellent thermal and chemical resistance properties in harsh environments.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Chuanjie Fang, Wenyi Liu, Pengfei Zhang, Minwei Yao, Saeid Rajabzadeh, Noriaki Kato, Ho Kyong Shon, Hideto Matsuyama
Summary: This study focused on controlling the inner surface structures of PVDF hollow fiber membranes for DCMD by using different bore liquids with varying compatibilities with the diluent and polymer. The compatibility of the bore liquids was found to significantly impact the inner surface pore size and spherulite structures, ultimately affecting the membrane's water vapor permeability, hydrophobicity, liquid entry pressure, salt rejection, and wetting resistance. This research provides valuable insights for selecting appropriate bore liquids to prepare high-performance hollow fiber membranes with desired inner surface structures.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Shadia R. Tewfik, Mohamed H. Sorour, Heba A. Hani, Hayam F. Shaalan, Abdelghani M. G. Abulnour, Marwa M. El Sayed, Eman S. Sayed, Mahmoud Eltoukhy
Summary: This study focuses on the fabrication and characterization of polyvinylidene fluoride (PVDF) hollow fiber membranes using a pilot scale spinning system. The effects of different fabrication conditions and additives on the membrane properties were investigated.
DESALINATION AND WATER TREATMENT
(2022)
Article
Engineering, Chemical
Yi Yang, Xinfei Fan, Yuanlu Xu, Chengwen Song, Zonglin Pan, Yanming Liu
Summary: In this study, an all-in-one conductive hollow fiber membrane was fabricated, which exhibited high distillate flux and low energy requirement, as well as superior resistance to salt.
Article
Engineering, Chemical
Mohammad Nasiraee, Seyed Mahmoud Mousavi, Ehsan Saljoughi, Shirin Kiani, Kourosh Razmgar
Summary: Membrane distillation crystallization (MDC) was used for the first time to obtain calcium nitrate crystals from its aqueous solution, with the addition of Span 85 to improve membrane hydrophobicity and enhance water flux and crystal production.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Environmental Sciences
Gizem Tuncay, Turker Turken, Ismail Koyuncu
Summary: In this study, braid reinforced membranes were fabricated using two different molecular weights of PVDF polymers. The blending of the polymers improved the membrane performance, resulting in a hydrophilic structure with a smoother surface. The investigation showed that the blend membrane had less adsorption of pollutants and reduced fouling.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Jihyeon Kim, Jinwon Lee, Lindsey B. Bezek, Bumjin Park, Kwan-Soo Lee
Summary: PVDF dual-layer hollow fiber membranes were prepared using TIPS and NIPS methods for water treatment application. The addition of nucleating agent NA11 improved the mechanical strength of the membrane by up to 42%. The thickness of the coating layer affected the porosity and mechanical performance of the membrane, resulting in high durability under harsh processing conditions.
Article
Engineering, Environmental
Lusi Zou, Guoyin Zhang, Jianjia Yu
Summary: This study develops polyvinylidene fluoride hollow fiber membranes with special additive mixtures, achieving desirable membrane characteristics and improved performance. The developed membrane shows enhanced properties for direct contact membrane distillation (DCMD) process, including higher porosity, liquid entry pressure, and mechanical strength.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Chemical
Jie Zhao, Jeng Yi Chong, Lei Shi, Rong Wang
Summary: A novel approach was developed to immobilize F127 in PVDF hollow fiber membranes using PTFE particles as a binding agent through the N-TIPS method. The dual functions of F127 in pore formation and surface hydrophilization for PVDF membranes were observed. The membranes showed excellent pure water permeability and tensile strength, demonstrating the potential of the N-TIPS method for tuning membrane pore structure and hydrophilicity using multifunctional additives.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Polymer Science
Mustafa Kalay, Abidin Esidir, Mahmut Ruzi, N. Burak Kiremitler, Mustafa Serdar Onses
Summary: This study proposes stable and addressable polymer PUFs, utilizing a cross-linkable polymer system, which demonstrates high stochastic characteristics and low-cost production. The performance of the polymer features is evaluated through various analyses, and direct image authentication is achieved using feature matching algorithms.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Jingyu Jin, Guoqiang Lu, Jun Nie, Xiaoqun Zhu
Summary: Photopolymerization technology is limited in the fields of food packaging and biomedicine due to the high migration of small molecules from photoinitiators. In this study, a polymerizable 2-vinyl thioxanthone (ETX) was synthesized to improve the migration stability of photoinitiators. Macromolecular photoinitiators (PPI1, PPI2) were also prepared to further reduce migration. The results showed that the ETX/TEOA system had higher initiation performance and PPI2 displayed favorable initiation ability. Additionally, the migration of ETX, PPI1, and PPI2 in photocured film was significantly reduced. These low-migration photoinitiators have potential applications in the fields of food packaging and biological materials.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Weijie Li, Jun Nie, Yingying Zhao, Xiaoqun Zhu
Summary: This study focuses on the development of high-performance, low-migration photoinitiators. A polymerizable photoinitiator (VBP) was synthesized by introducing an ethylene group into benzophenone, and three different molecular weight single-component photoinitiators (PVBN1-3) were synthesized based on VBP. The results show that these new photoinitiators have stronger absorption ability compared to benzophenone and significantly reduce the migration of initiators and co-initiators, addressing the safety concerns caused by migration.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Seira Morimune-Moriya, Yuki Iwahashi, Mitsuru Nakamura, Daisuke Ogawa, Keiji Nakamura
Summary: This study investigates the effect of plasma treatment on carbon nanotubes (CNTs) and the structure/properties of polyimide (PI) nanocomposites with ultra-low content of CNTs. The results show that plasma treatment introduces isocyanate groups on the surface of CNTs and enhances the interfacial interaction between PI and treated CNTs. This leads to a significant improvement in the mechanical properties of the nanocomposites, with even a small addition of treated CNTs showing a substantial increase in Young's modulus, tensile strength and toughness.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Yuanlong Li, Chaojie Chen, Guoqing Cui, Li Liu, Chao Zhou, Guangfeng Wu
Summary: In this study, a novel ion-conducting hydrogel was fabricated using a straightforward approach. The hydrogel showed excellent tensile properties and high toughness due to physical interactions and covalent binding. Additionally, the introduction of hydroxyethyl cellulose and lithium chloride improved the biocompatibility, mechanical properties, electrical conductivity, and frost resistance of the hydrogel, demonstrating its potential for cold climate applications.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Dengwei Yan, Jinxian Yang, Xuejun Pan, Xiaozheng Duan, Lianwei Li, Mo Zhu
Summary: The influence of backbone length on grafting efficiency during the graft-onto reaction process was investigated. It was found that the polydispersity effect of backbone length does not affect the final grafting efficiency, indicating that the local dynamics of chain segments dominate the graft-onto process.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Zhaoyi Luo, Xianjie Pan, Fanqi Liu, Quanxi Yi, Yanning Zeng, Yunhua Chen, Chaoyang Wang
Summary: This study provides a method to prepare high-performance epoxy materials with good malleability and thermal stability. The materials have self-healing and welding capabilities, thanks to the addition of specific chemical bonds and network structures. They exhibit mechanical properties comparable to commercial epoxy resins and show great potential for sustainable industrial development.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Chaoji Xiong, Hao Wang, Lihua Deng, Kun Liang, Chunhua Wu, Wei Wu, Qian Chen
Summary: In this study, four polyamides were synthesized and their adsorption performances for Hg2+ in aqueous systems were investigated. The polyamides exhibited high adsorption capacities and excellent reusability, with the involvement of sulfur, nitrogen, and oxygen in the chemical adsorption process of Hg2+.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Siim Laanesoo, Olivier Bonjour, Rauno Sedrik, Iris Tamsalu, Patric Jannasch, Lauri Vares
Summary: The insertion of rigid aliphatic or aromatic building blocks in polymer structures is an effective way to synthesize high -Tg polymer materials. In this study, a series of isosorbide-2-aryl carboxylate-5-methacrylate monomers (ArIMAs) were synthesized by functionalizing isosorbide 5-methacrylate with various aromatic lignin-inspired esters. These monomers were polymerized to obtain high molecular-weight poly(aryl carboxylate isosorbide methacrylates) (PArIMAs). The resulting polymers showed high glass transition temperatures and thermal stability, making them suitable for use as high-performance plastics and coatings.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Yuqian Wu, Weijie Xu, Jianliang Li, Zhangfeng Zhong, Liqing Huang, Shengke Li, Huaping Tan
Summary: This study investigates the improvement of degradation and drug release characteristics of dynamic Schiff base-mediated natural polysaccharide hydrogels using tannic acid (TA), leading to enhanced stability and functionality.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Xi Zhang, Xiangli Kong, Xin Zhou, Yiyan Gao, Yibo Sun, Guanghui Gao, Wei Liu, Kai Shi
Summary: Conductive hydrogels have great development prospects in flexible strain sensors, but long-term direct contact with human skin can cause bacterial infection. A hydrogel with antibacterial, biocompatibility, and toughness was designed and manufactured using a freeze-thaw method. The hydrogel maintains tensile properties and fatigue resistance at low temperatures and is resistant to bacteria. Therefore, hydrogel sensors can be used to monitor human movements.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Wei Zhang, Jiangang Yu, Mingyang Wu, Rui Li, Anqiang Zhang, Yaling Lin
Summary: In this study, polyacrylamide containing quaternary ammonium salts (PAM-X) were synthesized and found to effectively inhibit soil-borne pathogenic fungi while maintaining the balance of microbial population in soil. PAM-X also showed low toxicity to earthworms and fish, providing a new method for the prevention and control of soil-borne fungal diseases.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Jiawen He, Haojie Yu, Li Wang, Jian Yang, Yanhui Zhang, Wenbing Huang, Chenguang Ouyang
Summary: This review discusses the use of polymeric hydrogels for atmospheric water harvesting (AWH), including the mechanism of water sorption, fabrication methods, and strategies for optimizing the structure of hydrogels. The extended applications of hygroscopic photothermal hydrogels, such as agricultural irrigation and dehumidification, are also explored. The challenges and prospects of using polymeric hydrogels for AWH are summarized.
EUROPEAN POLYMER JOURNAL
(2024)
Article
Polymer Science
Ying Du, Shuaishuai Lu, Yuanna Sun, Qingshan Li, Xinhai He
Summary: This study introduces a method to improve the performance of hydrogels by incorporating proline, resulting in hydrogels with excellent stretchability, high conductivity, and long-term stability. The hydrogel remains flexible and conductive even at ultra-low temperatures.
EUROPEAN POLYMER JOURNAL
(2024)