Article
Biochemistry & Molecular Biology
Nazim Nassar, Felicity Whitehead, Taghrid Istivan, Robert Shanks, Stefan Kasapis
Summary: The crosslinking of HPMC and AAc led to the development of a high-solid matrix with variable glass transition properties, characterized by a highly amorphous macromolecular entity. The manipulation of rheological and calorimetric glass transition temperatures through the addition of acrylic acid was observed, showing potential for applications in targeted bioactive compound delivery.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Polymer Science
Todsapol Kajornprai, Putita Katesripongsa, Sang Yong Nam, Zuratul Ain Abdul Hamid, Yupaporn Ruksakulpiwat, Nitinat Suppakarn, Tatiya Trongsatitkul
Summary: This study demonstrated the potential applications of thermoresponsive poly(N-isopropylacrylamide) (PNIPAm) grafted nylon membranes through different grafting yields and architecture. The membranes exhibited thermoresponsive gating performance below and above the lower critical solution temperature of PNIPAm. The study also showed excellent oil/water separation and gas barrier properties of the membranes, indicating their suitability for various applications.
Article
Materials Science, Paper & Wood
Amira S. Mohammed Ali, Moataz M. Soliman, Sherif H. Kandil, Marwa M. A. Khalil
Summary: This study investigated the effect of adding Linde Type A Zeolite Nanoparticles on the performance of mixed matrix membranes for reverse osmosis. The results showed that the addition of ZNPs can improve salt rejection and water permeability.
Article
Polymer Science
Nouf F. Al-Harby, Mervette El Batouti, Mahmoud M. Elewa
Summary: This study compared pervaporation (PV) and membrane distillation (MD) for desalination of saline/hypersaline water using the sweeping air approach. The results showed that MD had higher flow rates and salt rejection percentages. The flux was positively correlated with the feed temperature and inversely related to the cooling water temperature. The type of membrane and pore size of PTFE membrane had minimal impact on the desalination process.
Article
Chemistry, Physical
Amira S. Mohammed Ali, Moataz M. Soliman, Sherif H. Kandil, Shaker Ebrahim, Marwa Khalil
Summary: In this study, cellulose acetate (CA) silica-based nanocomposite membranes were fabricated using the dry-wet phase inversion procedure for water desalination. The effects of SNPs and MSNPs on the properties and performance of the CA membrane were investigated. The fabricated nanocomposite membranes exhibited hydrophilic surface properties and showed enhanced water flux by adding SNPs and MSNPs.
JOURNAL OF MATERIOMICS
(2022)
Article
Materials Science, Multidisciplinary
Yoon Huh, Seulgi Yu, June Huh, Joona Bang
Summary: Herein, we present a facile method for preparing superhydrophobic oil/water separation membranes. The covalent bonding of PVDF on the surface enhances the stability and results in excellent separation performance under various environments.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Paper & Wood
Omneya A. Koriem, Marwa S. Showman, Ahmed H. El-Shazly, Marwa F. Elkady
Summary: The study investigated the optimal polymeric blending ratio between cellulose acetate (CA) and polyvinylidene fluoride (PVDF) to create a blended polymeric membrane with enhanced properties. The inclusion of nano-sized metal organic framework (UiO-66 MOF) further improved the membrane performance. The resulting hybrid membrane showed promising salt rejection and permeate water flux for water desalination applications.
Article
Engineering, Chemical
Selda Erkoc-Ilter
Summary: Zwitterionic hybrid cellulose acetate membranes were produced using a modified NIPS process with the addition of a zwitterionic compound. The membranes showed improved flux and antifouling performance. XPS, SEM, and TGA confirmed the successful incorporation of the zwitterionic compound into the membranes. The hybrid membranes exhibited increased permeate flux and maintained good salt rejection in filtration tests.
Article
Engineering, Chemical
Liang Ying Ee, Regina Pei Woon Tan, Sean Yi Rong Chia, Sam Fong Yau Li
Summary: Cellulose acetate (CA) desalination membranes can have improved fouling resistance and water permeability by introducing electrospray-mediated coating of cellulose nanocrystals (CNCs). The results showed that the pure water permeability coefficient reached as high as 7.89 L m-2 h-1 bar-1 with one electrospray scan of 0.50% w/v CNC, while maintaining high ion rejection efficiencies against brackish water. The hydrophilic CNC facilitated the preparation of a low viscoelastic and swollen active layer, achieving high flux recovery and reduction in bacterial colonization with 0.50% CNC-coated CA membrane.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Zhirong Hu, Haixia Zhang, Xiong-Fei Zhang, Mingmin Jia, Jianfeng Yao
Summary: In this study, the interfacial compatibility between cellulose acetate (CA) matrix and ZIF-8 crystals was enhanced by grafting polyethylenimine (PEI) onto ZIF-8 particles. The resulting PEI grafted ZIF-8@CA (PZIF-8@CA) membrane exhibited better gas separation performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Polymer Science
McKenzie L. Coughlin, Jerrick Edmund, Frank S. Bates, Timothy P. Lodge
Summary: Methylcellulose (MC), a water-soluble cellulose ether, exhibits thermoreversible gelation, which has multiple applications. Recent research has shown that MC gelation is caused by the formation of nanofibrils with a uniform diameter (approximately 15 nm) and that gelation can be suppressed by adding low-molecular-weight poly(ethylene glycol) along the backbone. In this study, we modify MC with thiol-terminated poly(N-isopropylacrylamide) (PNIPAm) using thiol-ene click chemistry and investigate its influence on aqueous MC solution properties. The results suggest that grafting PNIPAm increases the coil dimensions and the persistence length of MC, and it also increases the theta temperature, even though PNIPAm typically has a lower critical solution temperature. Fibril formation still occurs at high temperature for the grafted chains.
Article
Environmental Sciences
Ye -Lim Han, Hye-Ran Kim, Hyun-Kyung Kim, Jae -Woo Park
Summary: A series of thermosensitive and magneto-responsive dendrimers were synthesized and their properties at different temperatures were studied. The results showed that PNIPAM-g-MCD could encapsulate and fix benzene molecules below the critical solution temperature, while it could disrupt oil-water emulsions above the critical solution temperature.
Article
Engineering, Chemical
Takahito Nakao, Mayumi Akashi, Miharu Ishibashi, Miyuki Yao, Keizo Nakagawa, Takuji Shintani, Hideto Matsuyama, Tomohisa Yoshioka
Summary: Raman spectroscopy shows significant potential in investigating nanoporous structures inside membranes, with correlations observed with mechanical properties and RO performances. The fabrication of sulfonated poly(arylene ether sulfone) and cellulose triacetate asymmetric hollow fiber membranes, along with examination of their nanoporous structures using Raman spectroscopy, demonstrated the effectiveness of this method.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Multidisciplinary
Saiful, Sharmila Hasima, Nurul Kamila, Rahmi
Summary: The availability of hygienic drinking water is a significant issue in many countries, especially in emerging and developing countries, as well as those prone to disasters. This study focuses on developing a forward osmosis (FO) membrane made from cellulose acetate (CA) to desalinate brackish water and produce safe drinking water. The FO membrane, synthesized from cellulose isolated from waste palm oil empty fruit bunches, demonstrates high water flux and rejection factor, and the produced water meets drinking water quality standards.
RESULTS IN ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Fatma Seden Tekin, P. Zeynep Culfaz-Emecen
Summary: The effects of three different solvent systems on the preparation of cellulose acetate membranes by phase inversion were investigated. Acetone as cosolvent resulted in an asymmetric membrane morphology, while acetic acid led to a loose, almost isotropic structure. The phase inversion rate was significantly lower when acetic acid was used as cosolvent, mainly due to its high viscosity.
ACS APPLIED POLYMER MATERIALS
(2023)
