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Immobilised Enzyme Technologies for the Removal of Water Pollutants and Toxic Contaminants
Published in S Rangabhashiyam, V Ponnusami, Pardeep Singh, Biotechnological Approaches in Waste Management, 2023
Nur Izyan Wan Azelee, Nor Hasmaliana Abdul Manas, Nurrulhidayah Salamun, Mohd Akmali Mokhter, Muhammad Abd Hadi Bunyamin, Nurul Elia Aqila Abu Rahim, Siti Fatimah Zaharah Mohd Fuzi, Masngut
Besides functionalised CNT, the macroscopic size of CNT sheets assembly, called as Buckypaper, is also gaining serious attention from research community recently. It is due to the special properties of Buckypaper that is known to be good in thermal conductivity, chemical stability, possessing high specific surface area and good tensile strength (Liu et al., 2013). Enzyme-immobilised BP is envisaged to have a great potential and capacity as biocatalyst since these materials have eco-friendly properties, high adsorption capacity as well as good reusability and recovery performance of both enzymes and supports (Jun et al., 2019).
Nanomaterial-based FRs
Published in Asim Kumar Roy Choudhury, Flame Retardants for Textile Materials, 2020
Buckypaper is a macroscopic aggregate of carbon nanotubes (CNT), or buckytubes. It owes its name to the buckminsterfullerene, the 60 carbon fullerene (an allotrope of carbon with similar bonding that is sometimes referred to as a Buckyball in honor of R. Buckminster Fuller) (Yahoo!, 2008).
Carbon Nanostructures and Their Application to Water Purification
Published in Klaus D. Sattler, st Century Nanoscience – A Handbook, 2020
A nanotube-based material that has exhibited higher adsorption to NOM than traditional ones, such as AC, is the nanotube buckypaper. It is nothing but a structure of tangled CNTs that form a self-supporting, chemically and physically stable architecture. The buckypaper has good thermal, electronic and mechanical properties; consequently, it is used in various fields, such as in the construction of artificial muscles, electrodes, and precisely water purification. It is traditionally prepared by the filtration of CNT dispersions in a solvent or in solutions with surfactants. The properties of the buckypaper as the best adsorbent are due to its porous structure and to the lower negative charge present on the surface of the nanotubes. Furthermore, the π–π interactions between the aromatic rings of nanotubes and organic matter contribute to a better adsorption. As proof of this, the buckypaper has shown a removal of more than 93% of humic acid, a natural substance that is formed as a result of the microbial biodegradation of organic matter. High efficiency has been attributed to the incorporation of hydrophilic functional groups on the purified nanotube buckypaper, improving its hydrophilicity and allowing a better and faster contact between the humic acid in solution and the surface of the carbonaceous material [18].
Sequential Design for Functional Calibration of Computer Models
Published in Technometrics, 2018
Ahmed Aziz Ezzat, Arash Pourhabib, Yu Ding
Let us illustrate the problem setting using the buckypaper fabrication experiments (Wang et al. 2004). Buckypaper is made of carbon nanotubes and has desired properties such as high tensile strength, relative to the thinness and light weight of the resulting buckypaper. To enhance the material’s tensile strength, the polyvinyl acid (PVA) is added to the buckypaper and functions like glue. An important task in the fabrication process is to understand and test the effect of PVA on the strength of the buckypapers. For that purpose, a finite element analysis (FEA) model was developed to simulate the response of the buckypaper’s tensile strength under different PVA levels (Wang et al. 2017). This computer model is to be calibrated using the outputs from a set of physical experiments.