Sustainable techniques in grinding: State of the art review

Singh, Aswani Kumar; Kumar, Amresh; Sharma, Varun; Kala, Prateek

doi:10.1016/j.jclepro.2020.121876

Cited by 65 publications

(15 citation statements)

References 101 publications

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“…Nanoparticles are formed by converting the bulk material into atomic structures [158]. (2) Strong deformation techniques, in which crystalline materials (e.g., metals or porcelains) are strongly deformed to enhance the nanoparticle's hardness and ductility [159]. (3) In grinding, the starting material is subjected to extremely high energy, and ground with steel balls to obtain powdered nanoparticles.…”

Section: Classification Based On the Nature Of The Deriving Forcesmentioning

confidence: 99%

“…These nanoparticles have a size that varies from 3 to 25 nm [160]; (4) scrubbing in which thin silicon strips rub by immersion in chemicals (e.g., hydrofluoric acid) to obtain silicone particles on the strip surface. Then, strips are placed in a solution (e.g., isopropanol) at an ultrasound device to form nanosized droplets [159,161].…”

Section: Classification Based On the Nature Of The Deriving Forcesmentioning

confidence: 99%

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Review on Natural, Incidental, Bioinspired, and Engineered Nanomaterials: History, Definitions, Classifications, Synthesis, Properties, Market, Toxicities, Risks, and Regulations

et al. 2022

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Nanomaterials are becoming important materials in several fields and industries thanks to their very reduced size and shape-related features. Scientists think that nanoparticles and nanostructured materials originated during the Big Bang process from meteorites leading to the formation of the universe and Earth. Since 1990, the term nanotechnology became very popular due to advances in imaging technologies that paved the way to specific industrial applications. Currently, nanoparticles and nanostructured materials are synthesized on a large scale and are indispensable for many industries. This fact fosters and supports research in biochemistry, biophysics, and biochemical engineering applications. Recently, nanotechnology has been combined with other sciences to fabricate new forms of nanomaterials that could be used, for instance, for diagnostic tools, drug delivery systems, energy generation/storage, environmental remediation as well as agriculture and food processing. In contrast with traditional materials, specific features can be integrated into nanoparticles, nanostructures, and nanosystems by simply modifying their scale, shape, and composition. This article first summarizes the history of nanomaterials and nanotechnology. Followed by the progress that led to improved synthesis processes to produce different nanoparticles and nanostructures characterized by specific features. The content finally presents various origins and sources of nanomaterials, synthesis strategies, their toxicity, risks, regulations, and self-aggregation.

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Section: Classification Based On the Nature Of The Deriving Forcesmentioning

confidence: 99%

Section: Classification Based On the Nature Of The Deriving Forcesmentioning

confidence: 99%

Review on Natural, Incidental, Bioinspired, and Engineered Nanomaterials: History, Definitions, Classifications, Synthesis, Properties, Market, Toxicities, Risks, and Regulations

et al. 2022

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“…[BMIM]BF4 [HMIM]BF4 Vegetable oils Thermal conductivity at 25℃ / W/(m•K) 0.186 [21] 0.170 [22] <0.170 [23] Heat capacity at 100℃ / J/(g•K) 1.66 [21] 2.68 [22] <2.60 [23] Density at 20℃ / g/cm 3 1.26 [24] 1.15 [25] <1.00 [23] Thermal decomposition onset / ℃ 403 [24] 358 [25] About 300 [26] 1.3 The tribological mechanisms of nanoparticles on grinding interface under NMQL The introduction of solid nanoparticles into grinding interface under NMQL can cause new changes to the formation mechanism of lubrication film between abrasive grain and workpiece. Currently, existing researches mainly put forward the following four tribological mechanisms for nanoparticles [31]. (1) Rolling effect.…”

Section: Propertymentioning

confidence: 99%

EHTT2022-Tribological Mechanism of Graphene/Ionic Liquid Nanofluid on Grain/Workpiece Grinding Interface under Nanofluid Minimum Quantity Lubrication

Wang

Zhang

Zhao

et al. 2022

Preprint

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Graphene nanosheets and ionic liquids (ILs) both have excellent heat transfer and lubricating properties and both have great potential in minimum quantity lubrication (MQL) grinding, however the grinding performance of graphene/IL nanofluids under nanofluid minimum quantity lubrication (NMQL) is still unclear. This research firstly evaluates the grinding performances of graphene/IL nanofluids under NMQL experimentally. The evaluation shows that graphene/IL nanofluids can further strengthen both the cooling and lubricating performances compared with MQL grinding using ILs only. The specific grinding energy and grinding force ratio can be reduced by over 40 percent at grinding depth of 10 μm. Workpiece machined surface roughness can be decreased by over 10 percent, and grinding temperature can be lowered over 50 ℃ at grinding depth of 30 μm. Aiming at the unclear tribological mechanism of graphene/IL nanofluids, molecular dynamics simulations for abrasive grain/workpiece grinding interface are performed to explore the formation mechanism of physical adsorption film. The simulations show that the grinding interface is in a boundary lubrication state. IL molecules absorb in groove-like fractures on grain wear flat face to form boundary lubrication film, and graphene nanosheets can enter into the grinding interface to further decrease the contact area between abrasive grain and workpiece. The interlayer shear effect and low interlayer shear strength of graphene nanosheets are the principal causes of enhanced lubricating performance on the grinding interface. EDS and XPS analyses are further carried out to explore the formation mechanism of chemical reaction film. The analyses show that IL base fluid happens chemical reactions with workpiece material, producing FeF2, CrF3, and BN. The fresh machined surface of workpiece is oxidized by air, producing NiO, Cr2O3 and Fe2O3. The chemical reaction film is constituted by fluorides, nitrides and oxides together.

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“…3DP of therapeutic drug dosage may not replace the conventional methods, but they have a huge scope of complementing the present technologies due to the capability of bridging the therapeutic gap between individualized metabolic needs and the fixed dosage availability (Awad et al , 2018). The acceptance of AM can be a herald of the future with a plethora of sustainable opportunities (Gebler et al , 2014), also termed green opportunities (Singh et al , 2020). As compared to existing conventional techniques in manufacturing, AM techniques have been found environmentally more beneficial in the form of lean manufacturing (Huang et al , 2015), lesser energy consumption(Khalid and Peng, 2021), low carbon dioxide emissions (Gebler et al , 2014) and near-net shape fabrication, which resulted in less wastage (Faludi et al , 2015).…”

Section: Introductionmentioning

confidence: 99%

Investigations of personalized and sustainable approach of oral drug delivery systems through additive manufacturing

Reddy

Elgazzar²,

Sharma

2021

RPJ

Self Cite

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Purpose The purpose of this paper is to print a thermolabile drug-containing tablet using the fused deposition modeling (FDM) technique and analyze its mechanical, pharmaceutical and environmental feasibility using a variety of tests. Design/methodology/approach Ascorbic acid (Vitamin C) is the thermally-sensitive drug impregnated into polyvinyl alcohol excipient using ethanol-water mixture and printed by an FDM printer by varying three parameters without using any external stabilizing agent. Afterward, Taguchi analysis has been performed on these parameters to recognize the significant factors and interactions. Besides this, a regression model has been obtained based on the dissolution data. Various thermo-mechanical and pharmaceutical tests have been carried out to confirm the feasibility. Finally, a life cycle assessment (LCA) analysis has been carried out to compare it with the existing tableting method by considering the environmental impacts. Findings The dissolution profile was found to follow the Korsmeyer-Peppas model, where the drug release occurred both by dissolution and erosion. Further, the infill percent has been found as the most significant parameter. The characterization tests and imaging outputs proved the fidelity of this attempt. Finally, the three-dimensional printed method was found to be more environmentally sustainable than the existing conventional tableting process. Originality/value LCA on a printed tablet is a one-of-a-kind attempt. Thus, this research attempt delivered another approach to print personalized tablets at a temperature lower than prescribed temperatures with required release behavior and can contribute toward the quest of sustainable personalized medication.

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Sustainable techniques in grinding: State of the art review

Cited by 65 publications

References 101 publications

Review on Natural, Incidental, Bioinspired, and Engineered Nanomaterials: History, Definitions, Classifications, Synthesis, Properties, Market, Toxicities, Risks, and Regulations

Review on Natural, Incidental, Bioinspired, and Engineered Nanomaterials: History, Definitions, Classifications, Synthesis, Properties, Market, Toxicities, Risks, and Regulations

EHTT2022-Tribological Mechanism of Graphene/Ionic Liquid Nanofluid on Grain/Workpiece Grinding Interface under Nanofluid Minimum Quantity Lubrication

Investigations of personalized and sustainable approach of oral drug delivery systems through additive manufacturing

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