Article
Materials Science, Coatings & Films
T. Zhao, S. Zhang, F. Q. Zhou, H. F. Zhang, C. H. Zhang, J. Chen
Summary: In-situ TiC reinforced titanium matrix composites coating was prepared on the surface of Ti6Al4V using plasma transfer arc welding. The coating exhibited dense structure, no porosity, and good metallurgical bond with the substrate. Different phases formed in the coating contribute to its high microhardness and resistance to wear and corrosion.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Geochemistry & Geophysics
Yuzhong Liao, Yanguang Liu, Feng Liu, Chuan Lu, Gui Zhao
Summary: The study analyzed the geochemical and isotopic compositions of geothermal water in the Qutan and Reshuizhou geothermal fields to determine their characteristics and reservoir temperatures. It also highlighted the influence of water-rock interactions on the geochemical compositions of geothermal water.
Article
Chemistry, Physical
Yao Yan, Jia Liu, Bing Zhang, Ruohan Xia, Yuqi Zhang, Zisheng Guan
Summary: This work presents a method for preparing a robust antireflective (AR) coating on a polycarbonate (PC) substrate. The coating is prepared by dip-coating a mixed ethanol suspension of tetraethoxysilane (TEOS) base-catalyzed silica nanoparticles (SNs) and acid-catalyzed silica sol (ACSS). The addition of ACSS significantly improves the adhesion and durability of the coating, resulting in high transmittance and mechanical stability. Further treatment with water and hexamethyldisilazane (HMDS) vapor enhances the hydrophobicity of the AR coating. The prepared coating shows excellent antireflective properties, with average transmittance of 96.06% in the wavelength range of 400 to 1000 nm.
Article
Engineering, Manufacturing
Qiuyi Wang, He Han, Zhichao Lou, Xin Han, Xue Wang, Yanjun Li
Summary: Bamboo, which has high economic value in developing countries, has encountered limitations in its application due to structural and compositional defects. In this study, we successfully improved the performance of bamboo and developed a novel bamboo-based decorative material through a special coating method. This work provides a potential industrial pathway for the high-value utilization of bamboo.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Construction & Building Technology
Zhongwei Wang, Shoulu Yang, Zhu Liu, Fangjun Ding, Ning Ji, Yiqiang Wu
Summary: A novel method for preparing a tung oil-based flame retardant polyol (MTTO) is described. The MTTO showed excellent flame retardation and reduced the PHRR and THR of bamboo during combustion. The addition of melamine further enhanced the fire resistance.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Corentin Penot, David Martelo, Shiladitya Paul
Summary: Geothermal power is a reliable and efficient energy source that can effectively mitigate climate change. Heat exchangers in geothermal power plants face challenges of corrosion and scaling, which can be addressed through the use of corrosion-resistant alloys, protective coating systems, and anti-scaling agents. Recent advancements in these strategies contribute to the sustainable development of geothermal energy.
APPLIED SCIENCES-BASEL
(2023)
Article
Forestry
Yang Yang, Lei Zhang, Hongfei Huo, Minzhen Bao, Zaixing Wu, Yongjie Bao, Yuhe Chen, Zhongfeng Zhang, Neng Li
Summary: A composite protective coating containing organic and inorganic UV absorbers and a hindered amine light stabilizer (HALS) was investigated for enhancing the weatherability of bamboo-based products and increasing their application lifespan.
Article
Energy & Fuels
Batoul M. Gisler, Stephen A. Miller
Summary: This study investigates the impact of porosity reduction caused by silica precipitation on pore pressure development, heat transfer, and reactive flow in a geothermal system. The findings suggest that porosity reduction can lead to excess pore pressure, affecting rock mass stability and the likelihood of tensile failure. Consequently, considering the effective stresses associated with solute deposition is crucial for accurate studies of rock failure and has important implications for the long-term thermo-hydraulic properties of geothermal reservoirs.
Article
Chemistry, Physical
Jackson Ilha, Amanda Figueiro, Marina Carla Grando, Domingos Lusitaneo Pier Macuvele, Marcio Antonio Fiori, Natan Padoin, Humberto Gracher Riella, Cintia Soares
Summary: This study evaluated the effects of the nanosilica-NPS:polycaprolactone-PCL ratio and heat treatment on the wettability of NPS/PCL coatings in aqueous systems. The results showed that increasing the nanosilica content led to a decrease in water contact angle, while heat treatment significantly increased the water contact angle. These findings provide new insights into the wettability of hydrophobic nanoparticles in aqueous systems.
SURFACES AND INTERFACES
(2022)
Article
Energy & Fuels
Rania Hendawi, Arjan Ciftja, Lars Arnberg, Marisa Di Sabatino
Summary: Safe implementation of reusable crucibles in the silicon PV industry requires a thorough understanding of reactions to avoid liquid infiltration and crucible failure. By adding colloidal silica to silicon nitride coating, the oxygen concentration can be controlled, crucible degradation can be avoided, and the pre-oxidation step can be eliminated. An analytical model was used to quantify the effect of oxygen content in the coating on the depletion rate, providing insight into hindering liquid infiltration by forming and stabilizing silicon oxynitride in the coating.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Polymer Science
Xiaofei Li, Xiao Wang, Yukun Yuan, Mingyuan Wu, Qingyun Wu, Jiuyi Liu, Jianjun Yang, Jianan Zhang
Summary: A facile approach was developed for preparing a sprayable, durable, and superhydrophobic coating for efficient oil/water separation and oil absorption based on silica particle brushes via surface-initiated (SI-ATRP). The coating showed high efficiency in oil/water separation and oil absorption, making it a promising candidate for industrial oil-contaminated water treatments and marine oil cleanup in harsh environments.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Polymer Science
Ramesh Kanthasamy, Mohammed Algarni, Leo Choe Peng, Nur Ain Zakaria, Mohammed Zwawi
Summary: In this study, hydrophilic silica nanoparticles and hydrophobic silane were used to modify the surface of polyurethane (PU) paint to improve its fouling properties. The addition of silica nanoparticles followed by silane modification resulted in minimal changes in surface morphology and water contact angle. However, when perfluorooctyltriethoxy silane was used to modify the PU coating blended with silica, the fouled area significantly increased compared to the unmodified PU coating. On the other hand, blending silica nanoparticles without silane modification reduced the fouled area. Additionally, coating the PU coatings with silica nanoparticles dispersed in different solvents using the dual-layer coating method improved the surface roughness and hydrophilicity. The use of paint thinner as a solvent resulted in a superhydrophobic and antifouling surface.
Article
Construction & Building Technology
Mujtaba Hussain, Muhammad Ali Sikandar, Abdul Nasir, Waqas Ahmed
Summary: The study found that silica-coated thermochromic pigment promotes the hydration degree and increases the compressive strength of cement pastes. The SiO2 coating plays a protective role in the harsh cementitious environment.
JOURNAL OF BUILDING ENGINEERING
(2021)
Review
Energy & Fuels
Silje Bordvik, Erling Naess
Summary: This study investigates the precipitation of silica from high-enthalpy, depressurized supercritical fluids and aims to determine the best method for assessing scaling potential. It is particularly relevant for geothermal sources located near magma, where temperature gradients in the rocks are high. Knowledge gaps, including mineral precipitation from produced fluids, limit commercial use in these systems. Understanding particle properties, growth dynamics, and deposition behavior is crucial for managing deposits and preventing scaling in geothermal power plants. Experimental data on silica precipitation from highly supersaturated superheated steam are limited, and the kinetics differ from liquid water. The use of three separate mathematical steps for quantifying solids in depressurized supercritical fluids and superheated steam, namely nucleation, growth by agglomeration, and surface deposition, is proposed as a reliable approach.
Article
Chemistry, Applied
Yangshuhan Xu, Daming Gao, Qiang Dong, Minghua Li, Anqiu Liu, Xiaochen Wang, Shufen Wang, Qiao Liu
Summary: In this study, hydrophobic and hydrophilic nano-silica modified epoxy coatings were used to protect carbon steel from corrosion. The results demonstrated that adding hydrophobic nano-silica significantly enhances the anticorrosive performance of epoxy coatings.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Environmental Sciences
Robby Soetanto, Ferry Hermawan, Nafsika Drosou, Lee Bosher, Jati Utomo Dwi Hatmoko
Summary: This study investigates the influence of socio-cultural background on community resilience to flooding and social responsibility perceptions. The results show that Indonesian communities have a higher level of social responsibility scores compared to UK communities, and the experience of flooding has a stronger influence on social responsibility perceptions in UK communities.
Article
Materials Science, Paper & Wood
S. Silviana, Afriza Ni'matus Sa'adah
Summary: This study aims to develop bacterial cellulose (BC) based biocomposites reinforced by bamboo microfibrillated cellulose (MFC) using epoxidized waste cooking oil (EWCO) as a plasticizer. The addition of bamboo MFC as a reinforcement agent improved the tensile strength of the biocomposites, while plasticizing with EWCO increased the degradation temperature of the materials.
CELLULOSE CHEMISTRY AND TECHNOLOGY
(2022)
Article
Engineering, Chemical
Lathifah Puji Hastuti, Ahmad Kusumaatmaja, Adi Darmawan, Indriana Kartini
Summary: A photocatalytic membrane based on polyacrylonitrile (PAN) and TiO2/CNT has been developed to overcome fouling formation on the membrane and enhance waste treatment efficiency. The PAN concentration affects the fiber morphology and pore size. The membrane with a PAN concentration of 6.5% shows the best performance in methylene blue removal.
BULLETIN OF CHEMICAL REACTION ENGINEERING AND CATALYSIS
(2022)
Article
Environmental Studies
Lathifah Puji Hastuti, Ahmad Kusumaatmaja, Adi Darmawan, Indriana Kartini
Summary: Incorporating TiO2 with CNTs and PAN nanofiber structures produces a photocatalytic membrane composite that shows a strong response in the visible region. The composite offers an efficient process without the need for post-treatment separation. Electrospinning was used to fabricate the composite membranes, resulting in randomly oriented nanofibers. The addition of CNTs increased the fiber diameter, while the bandgap of TiO2 shifted. The composite achieved over 95% color removal of methylene blue after 100 minutes of irradiation using low energy LED lamps.
ENERGY & ENVIRONMENT
(2023)
Article
Engineering, Chemical
Tutuk Djoko Kusworo, Andri Cahyo Kumoro, Nita Aryanti, Dani Puji Utomo, Hasrinah Hasbullah, Fadhilah Fatma Lingga, Ade Widiastuti, Monica Yulfarida, Febio Dalanta, Tonni Agustiono Kurniawan
Summary: This study investigates the effects of a graphene oxide (GO) and SiO2 composite as a nano-photocatalyst in a polysulfone (PSf) membrane for the treatment of natural rubber-laden wastewater (NRW) under UV irradiation. The incorporation of the composite successfully changed the properties of the membrane, enhancing its photocatalytic activity and hydrophilic properties. The PSf/GO/SiO2 membrane exhibited remarkable improvement in permeate flux, removal performance, and durability, making it promising for advanced treatment of NRW.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Energy & Fuels
S. Silviana, Annisya Noorpasha, Muhammad Miftahur Rahman, Cantika Aulia Salsabila, Afriza Ni'matus Sa'adah
Summary: This study investigates the use of silica impregnated with chitosan and cetyltrimethylammonium bromide (CTAB) as an adsorbent for CO2 separation from mixed gas. The results show that the chitosan-modified silica adsorbent has good CO2 adsorption performance.
Article
Engineering, Environmental
Tutuk Djoko Kusworo, Andri Cahyo Kumoro, Nita Aryanti, Tonni Agustiono Kurniawan, Febio Dalanta, Nur Hashimah Alias
Summary: The addition of ZnO-MnO2@SiO2 photocatalyst composite to the PSf membrane improves its performance and enhances the treatment of NRW. The composite membrane has a well-constructed structure and a uniform dispersion of photocatalyst elementals, and it exhibits stable flux, recyclability, and antifouling properties under UV light irradiation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Biomaterials
Ayu Sri Wahyuni, Damar Nurwahyu Bima, Choiril Azmiyawati, Adi Darmawan
Summary: This work presents the synthesis of PANI-SMc composites for antibacterial and anticandidal applications. PANI-SMc demonstrates antimicrobial activity against Escherichia coli, Staphylococcus aureus, and Candida albicans. The characteristic band of PANI at 1,570 cm(-1) corresponding to -C=C- stretching vibrations of quinoid (N=Q=N) shifted to similar to 1,570-1,620 cm(-1) in PANI-SMc, indicating increased involvement of imine nitrogen in the interaction. PANI-SMc exhibits an amorphous phase, and the addition of SMc improves its thermal stability. Though the magnetization of PANI-SMc is lower than SMc, it can still be magnetically separated by external magnetic fields. SEM images confirm the successful distribution of polyaniline.
INTERNATIONAL JOURNAL OF POLYMERIC MATERIALS AND POLYMERIC BIOMATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lathifah Puji Hastuti, Ahmad Kusumaatmaja, Adi Darmawan, Indriana Kartini
Summary: PAN/TiO2/CNT and PAN/TiO2/CNT-PVA composite nanofibrous membranes with photocatalytic activity were successfully synthesized using electrospinning. The presence of TiO2/CNT photocatalyst significantly enhanced the lifetime of the photocatalytic membrane and reduced membrane fouling, while maintaining good membrane flux.
SEPARATION SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yayuk Astuti, Diana Nurul Farihah, Aulia Zahra Ekaningsih, Adi Darmawan
Summary: The Bismuth oxide/commercial activated carbon/graphite composite was successfully synthesized using the hydrothermal method, and its characteristics were analyzed. The presence of Bi-O and Bi-O-Bi groups and the alpha-Bi2O3 crystal structure confirmed the formation of bismuth oxide. The composite exhibited a rod-like shape morphology with well-distributed bismuth oxide particles. The composite synthesized for a longer time showed the best electrochemical behavior, with electrical conductivity of 1.35 x 10(-2) S.m(-1), charge specific capacity of 285.882 mAhg(-1), and discharge specific capacity of 131.745 mAhg(-1). These findings suggest the potential application of this composite as a Li-ion battery anode.
MATERIALS SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Tutuk Djoko Kusworo, Andri Cahyo Kumoro, Nita Aryanti, Fadhilah Fatma Lingga, Ade Widiastuti, Alexandre A. Vetcher, Febio Dalanta
Summary: This study investigates the use of UV irradiation and PVA cross-linked modified PSf membrane to improve fouling issues and applies it to industrial rubber wastewater treatment. The results show that the modified membrane effectively increases the permeate flux and removes a significant amount of dissolved solids, chemical oxygen demand, and ammonia compound. The study also finds that UV irradiation and PVA cross-linked coating can enhance the fouling resistance of the membrane and further improve its performance.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Hasan Muhtar, Damar Nurwahyu Bima, Adi Darmawan
Summary: The synthesis of Ni-ARS complexes using different mole ratios and pH was studied. The results showed that the type of complex obtained was influenced by variations in pH, while variations in mole ratios did not affect the complex structure. Monomeric complexes were found to be more stable and had a higher yield compared to dimeric complexes. However, molecular docking studies revealed that dimeric complexes exhibited better antibacterial activity than monomeric complexes and ARS.
Article
Materials Science, Multidisciplinary
Adi Darmawan, Saral Dwi Miftiyati, Choiril Azmiyawati
Summary: The effect of carbonization temperature on thin-film carbon membranes for pervaporation desalination was investigated. It was found that higher carbonization temperatures produced membranes with superior separation performance.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Engineering, Chemical
Yayuk Astuti, Trie Nanda Mulyana, Brainy Happy Ana Tasiman, Adi Darmawan, Hendri Widiyandari
Summary: Bismuth oxide nanoparticles were synthesized with different fuel: oxidizer ratios and characterized. The results showed that the nanoparticles had different structures and morphologies depending on the ratio used. The sample with a fuel: oxidizer ratio of 1 exhibited the highest photocatalytic activity.
BULLETIN OF CHEMICAL REACTION ENGINEERING AND CATALYSIS
(2023)
Article
Engineering, Environmental
Tutuk Djoko Kusworo, Andri Cahyo Kumoro, Nita Aryanti, Hasrinah Hasbullah, Dinda Rizky Salsabilla Chaesarifa, Muhammad Daffa Fauzan, Febio Dalanta
Summary: In this study, a photocatalytic nanohybrid polyvinylidene fluoride (PVDF) membrane incorporated with nickel ferrite/graphene oxide (NiFe2O4/GO) photocatalyst was fabricated. The prepared membrane showed improved filtration performance in industrial dye wastewater treatment under UV light exposure. The membrane exhibited high permeability, pollutant removal, stability, photodegradation ability, and antifouling activity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)