Article
Engineering, Multidisciplinary
Cheng Gao, Ming Li, Chenjie Zhu, Youqin Hu, Tao Shen, Mengyu Li, Xingxiang Ji, Gaojin Lyu, Wei Zhuang
Summary: In this study, HBr was used as a catalyst to enhance the reactivity of lignin, which was then directly used to prepare phenolic foams without purification. Under optimized conditions, the phenolic hydroxyl content increased while the methoxyl group content dropped, leading to improved performance of the modified lignin-based phenolic resin compared to unmodified resin.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Chemistry, Analytical
Sarawut Khongkla, Apichai Phonchai, Piyaluk Nurerk, Opas Bunkoed
Summary: In this study, a hierarchical composite ZnO@Carbon foam/PVA cryogel was developed for the extraction and enrichment of parabens and synthetic phenolic antioxidants from fruit juice samples. The method showed good linear responses, with high recoveries, low relative standard deviations, and low limits of detection and quantification. The fabricated porous composite sorbent demonstrated ease of use and reusability, making it a promising tool for sample preparation in analytical chemistry.
MICROCHEMICAL JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Fangzhi Duan, Yongfeng Zhu, Hui Yu, Aiqin Wang
Summary: In recent years, porous adsorption materials have received extensive attention in environmental remediation. However, green preparation and effective post-treatment are still the main challenges in practical applications. In this study, a novel porous adsorbent was successfully fabricated from aqueous foams templates stabilized by natural plant Sapindus mukorossi (S. mukorossi) and nano-clay attapulgite (APT) via a thermally-initiated polymerization. The as-prepared porous adsorbent exhibited abundant interconnected pore structures and demonstrated excellent adsorption properties for chlortetracycline hydrochloride (CTC) and tetracycline hydrochloride (TC), with a maximum adsorption capacity of 620 mg/g and 538 mg/g, respectively. After adsorption, the waste porous adsorbent was converted into carbon/APT material through anaerobic calcination. At a carbonization temperature of 400 degrees C, carbon/APT with large amounts of negative charges and oxygen-containing functional groups exhibited a good adsorption capacity for Cd2+ and showed potential as a soil remediation agent.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Energy & Fuels
Osman Gencel, Abid Ustaoglu, Ahmet Benli, Gokhan Hekimoglu, Ahmet Sari, Ertugrul Erdogmus, Mucahit Sutcu, Gokhan Kaplan, Oguzhan Yavuz Bayraktar
Summary: Thermal energy storage using phase change materials is an effective method for decreasing heating and cooling loads. This research developed novel foam concretes containing shape-stable attapulgite based composite PCM as TES material. The inclusion of ATP/C-M decreased the thermal conductivity and improved the insulation properties of the foam concretes. The results showed that these foam concretes have good potential for temperature control and energy saving in buildings.
Article
Construction & Building Technology
Gokhan Kaplan, Oguzhan Yavuz Bayraktar, Baris Bayrak, Oguzhan Celebi, Burak Bodur, Ali Oz, Abdulkadir Cuneyt Aydin
Summary: This study examined the characteristics of geopolymer foam concrete (GFC) produced with attapulgite and diatomite. The study focused on the physicomechanical, durability, and microstructure properties of GFC. Different amounts of attapulgite and foam dosage were used, and three curing methods were employed. The results showed that a blend with 20% attapulgite and a foam dosage of 30 kg/m(3) produced the most desirable properties in terms of strength, thermal insulation, and durability.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Ceramics
Jinhuan Li, Huanmin Ji, Andong Li, Jiaojiao Zhang, Yi Yan, Linlin Ren, Hongyan Yu
Summary: The study focuses on the preparation of ultralight graphene/phenolic resin composite aerogels (GPFs) through the reduction and self-assembly of graphene oxide in water-soluble phenolic resin, followed by freeze-drying and low-temperature heat treatment to obtain carbonized foams (GPFs(T)). The GPFs(T) show greatly enhanced electromagnetic-wave absorbing performance compared to GPFs, with little graphene content ensuring the formation of threedimension (3D) skeleton network and reducing the carbonization temperature of phenolic resin. This work provides an effective method to fabricate ultralight materials with good electromagnetic-wave absorbing properties and high stability.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Hong Ma, Xiong-Fei Zhang, Zhongguo Wang, Lian Song, Jianfeng Yao
Summary: This study proposed a facile and effective method to fabricate ATP@cellulose composite foams with high metal ion removal efficiency and good recyclability. The excellent adsorption performance can be attributed to the unique pore structure, good dispersion of ATP, and abundant surface carboxyl groups in the foams.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Chemical
P. R. Sarika, Paul Nancarrow, Abdulrahman Khansaheb, Taleb Ibrahim
Summary: Phenolic foams are commonly used as insulation materials in construction, transportation, and spacecraft industries due to their flame retardant properties, thermal stability, low toxicity, and low smoke generation. With the increasing environmental issues and depletion of petroleum resources, the demand for polymeric materials produced from biomass resources is rising. Bio-based phenolic foams not only offer environmental benefits but also exhibit properties similar to or even superior to traditional phenolic foams.
CHEMBIOENG REVIEWS
(2021)
Article
Biochemistry & Molecular Biology
Hao Kong, Qian Li, Xiangqun Zheng, Peizhen Chen, Gengtao Zhang, Zhiping Huang
Summary: A novel lanthanum-modified-chitosan-attapulgite composite was prepared and characterized for efficient phosphate adsorption in water. The adsorption properties were investigated through kinetics, isotherms, and thermodynamics. The adsorbent showed excellent stability within a pH range of 4-10 and was not significantly influenced by co-existing substances. Chemisorption was the main mechanism for phosphate adsorption. The maximum adsorption capacity of the adsorbent was 102.90 mg/g, higher than other La-based adsorbents. The adsorption process was spontaneous, exothermic, and disordered. The adsorbent exhibited excellent effectiveness in real wastewater.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Materials Science, Multidisciplinary
Na Zhang, Bin Hu, Haoyu Guo, Rui Wang, Jiawei Sun, KaiKai Li, Haiyang Jia
Summary: In this study, nitrogen-doped porous carbon materials were synthesized using two different methods, and their physicochemical properties and supercapacitive performances were investigated. The results showed that the porous carbon prepared by the two-step process of pre-carbonization and reactivation exhibited a larger specific surface area and better supercapacitive performance compared to the material synthesized via the one-step in situ carbonization and activation process.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Engineering, Environmental
Ehsan Hamamizadeh, Hassan Asilian Mahabadi, Ali Khavanin
Summary: The present study investigated the effects of adding phenolic aerogel (PA) to flexible polyurethane foam on sound absorption coefficient, morphology, and mechanical properties. The results showed that increasing the concentration of PA led to an increase in the number of open pores and interconnections between cells. The PA/flexible polyurethane foam composite with 0.50 wt% of PA exhibited the highest sound absorption coefficient in the low-frequency range and improved the mechanical properties of FPUF.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Engineering, Environmental
Fangzhi Duan, Yongfeng Zhu, Hong Zhang, Yushen Lu, Aiqin Wang
Summary: In recent years, attapulgite (APT) has gained wide attention in stabilizing Pickering foam due to its excellent properties. This study investigated the properties of Pickering foam stabilized by APT with structural evolution using oxalic acid and Sapindus mukorossi. The results showed that APT with intact crystal structures had excellent removal rate at low concentration dye, while APT with large crystal defects had advantages in adsorption at high concentration dye. Furthermore, the waste adsorbents were used to prepare soil conditioner, improving the pH, cation exchange capacity, and electrical conductivity of the soil.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Construction & Building Technology
Juan He, Guoyou Liu, Guochen Sang, Junhong He, Yonghua Wu
Summary: The multi-component composite foaming agent (CFA) with excellent properties was prepared by using sodium alpha-alkenyl sulfonate (AOS), sodium dodecyl sulfate (K12), coconut oil (CO), rosin liquid (RL), hydroxypropyl methylcellulose ether (HPMC), xanthan gum, and sucrose. The foam stability and its performance in an alkaline environment and slurry were studied.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Environmental Sciences
Fangzhi Duan, Yongfeng Zhu, Yushen Lu, Jiang Xu, Aiqin Wang
Summary: A green liquid foam with high stability was prepared by synergistic stabilization of natural plant astragalus membranaceus (AMS) and attapulgite (APT), and a novel porous material with sufficient hierarchical pore structure was templated from the foam. The porous material showed excellent adsorption performance for cationic dyes in water and could be regenerated and cycled. This research provides a new idea for the green preparation of porous materials and the treatment of water pollution.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Biotechnology & Applied Microbiology
Yu-Ying Wang, Ling-Cong You, Hao-Hao Lyu, Yu-Xue Liu, Li-Li He, Yu-Di Hu, Fan-Chen Luo, Sheng-Mao Yang
Summary: Biochar-mineral composites were found to effectively immobilize heavy metals in naturally contaminated soil and reduce their bioavailability to plants. The addition of biochar-attapulgite composite at a 2% application rate demonstrated the highest efficacy in heavy metal immobilization. These findings highlight the potential of biochar-mineral composites as eco-friendly solutions for heavy metal remediation.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
