scholarly journals Measuring the size and density of nanoparticles by centrifugal sedimentation and flotation

2018 ◽  
Vol 10 (15) ◽  
pp. 1725-1732 ◽  
Author(s):  
Caterina Minelli ◽  
Aneta Sikora ◽  
Raul Garcia-Diez ◽  
Katia Sparnacci ◽  
Christian Gollwitzer ◽  
...  
Keyword(s):  
Polystyrene Nanoparticles ◽  
Analytical Centrifugation

Analytical centrifugation in sedimentation and flotation modes is used to measure both the size and density of polystyrene nanoparticles.

Synthesis and Characterization of Size Controllable Cationic Polystyrene Nanoparticles

2012 ◽  
Vol 29 (1) ◽  
pp. 29
Author(s):  
Hao CHEN ◽  
Qichao ZOU ◽  
Huan YU ◽  
Jinzhi ZHANG ◽  
Shigan CHAI
Keyword(s):  
Synthesis And Characterization ◽  
Polystyrene Nanoparticles

Polystyrene nanoparticles prepared by nanoprecipitation: A recyclable template for fabricating hollow silica

2021 ◽  
Vol 97 ◽  
pp. 307-315
Author(s):  
Khanh B. Vu ◽  
Thanh Khoa Phung ◽  
Thao T.T. Tran ◽  
Clement Mugemana ◽  
Ha N. Giang ◽  
...  
Keyword(s):  
Polystyrene Nanoparticles ◽  
Hollow Silica

Thick nanoporous matrices of polystyrene nanoparticles and their potential for electrochemical biosensing

2021 ◽  
Vol 368 ◽  
pp. 137607
Author(s):  
Jakub Sopoušek ◽  
Josef Humlíček ◽  
Antonín Hlaváček ◽  
Veronika Horáčková ◽  
Petr Skládal ◽  
...  
Keyword(s):  
Polystyrene Nanoparticles ◽  
Electrochemical Biosensing

scholarly journals Implementation of the emulsification-diffusion method by solvent displacement for polystyrene nanoparticles prepared from recycled material

RSC Advances ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 2226-2234
Author(s):  
Ana María Pineda-Reyes ◽  
Mauricio Hernández Delgado ◽  
María de la Luz Zambrano-Zaragoza ◽  
Gerardo Leyva-Gómez ◽  
Nestor Mendoza-Muñoz ◽  
...  
Keyword(s):  
Expanded Polystyrene ◽  
Added Value ◽  
Diffusion Method ◽  
Displacement Method ◽  
Polystyrene Nanoparticles ◽  
Solvent Displacement ◽  
Recycled Material

A novel solvent emulsification-displacement method for obtaining polystyrene nanoparticles is reported. This process has an added value and can be an alternative for the recycling of expanded polystyrene.

scholarly journals Functionalized Nanoplastics (NPs) Increase the Toxicity of Metals in Fish Cell Lines

2021 ◽  
Vol 22 (13) ◽  
pp. 7141
Author(s):  
Carmen González-Fernández ◽  
Francisco Guillermo Díaz Baños ◽  
María Ángeles Esteban ◽  
Alberto Cuesta
Keyword(s):  
Sparus Aurata ◽  
Gilthead Seabream ◽  
Fish Cell ◽  
Test Model ◽  
Fish Cell Lines ◽  
Polystyrene Nanoparticles ◽  
Commercial Fish ◽  
Cellular Protection ◽  
Marine Life

Nanoplastics (NPs) are one of the most abundant environment-threatening nanomaterials on the market. The objective of this study was to determine in vitro if functionalized NPs are cytotoxic by themselves or increase the toxicity of metals. For that, we used 50 nm polystyrene nanoparticles with distinct surface functionalization (pristine, PS-Plain; carboxylic, PS-COOH; and amino PS-NH2) alone or combined with the metals arsenic (As) and methylmercury (MeHg), which possess an environmental risk to marine life. As test model, we chose a brain-derived cell line (SaB-1) from gilthead seabream (Sparus aurata), one of the most commercial fish species in the Mediterranean. First, only the PS-NH2 NPs were toxic to SaB-1 cells. NPs seem to be internalized into the cells but they showed little alteration in the transcription of genes related to oxidative stress (nrf2, cat, gr, gsta), cellular protection against metals (mta) or apoptosis (bcl2, bax). However, NPs, mainly PS-COOH and PS-NH2, significantly increased the toxicity of both metals. Since the coexistence of NPs and other pollutants in the aquatic environment is inevitable, our results reveal that the combined effect of NPs with the rest of pollutants deserves more attention.

THE SIMULATION OF POLYSTYRENE/NANOPARTICLES COMPOSITE MICROSPHERES USING DISSIPATIVE PARTICLE DYNAMICS

2013 ◽  
Vol 12 (02) ◽  
pp. 1250111 ◽  
Author(s):  
HAILONG XU ◽  
QIUYU ZHANG ◽  
HEPENG ZHANG ◽  
BAOLIANG ZHANG ◽  
CHANGJIE YIN
Keyword(s):  
Dissipative Particle Dynamics ◽  
Sodium Dodecyl ◽  
Coarse Graining ◽  
Particle Dynamics ◽  
Coarse Grained ◽  
Polystyrene Nanoparticles ◽  
Coarse Grained Model ◽  
Composite Microspheres ◽  
Polystyrene Matrix ◽  
Materials Studio

Dissipative particle dynamics (DPD) was initially used to simulate the polystyrene/nanoparticle composite microspheres (PNCM) in this paper. The coarse graining model of PNCM was established. And the DPD parameterization of the model was represented in detail. The DPD repulsion parameters were calculated from the cohesive energy density which could be calculated by amorphous modules in Materials Studio. The equilibrium configuration of the simulated PNCM shows that the nanoparticles were actually "modified" with oleic acid and the modified nanoparticles were embedded in the bulk of polystyrene. As sodium dodecyl sulfate (SDS) was located in the interface between water and polystyrene, the hydrophilic head of SDS stretched into water while the hydrophobic tailed into polystyrene. All simulated phenomena were consistent with the experimental results in preparation of polystyrene/nanoparticles composite microspheres. The effect of surface modification of nanoparticles on its dispersion in polystyrene matrix was also studied by adjusting the interaction parameters between the OA and NP beads. The final results indicated that the nanoparticles removed from the core of composite microsphere to the surface with increase of a OA-NP . All the simulated results demonstrated that our coarse–grained model was reasonable.

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