Segmental dynamics and physical aging of polystyrene/silver nanocomposites

RSC Advances ◽  
2014 ◽  
Vol 4 (39) ◽  
pp. 20086-20093 ◽  
Author(s):  
Yu Lin ◽  
Langping Liu ◽  
Jiaqi Cheng ◽  
Yonggang Shangguan ◽  
Wenwen Yu ◽  
...  
Keyword(s):  
Silver Nanoparticle ◽  
Physical Aging ◽  
Segmental Dynamics ◽  
Variation Trend ◽  
Silver Nanocomposites ◽  
Complicated Variation

We report the complicated variation trend of calorimetric Tg and physical aging in PS/Ag nanocomposites, despite the invariant segmental dynamics with increasing silver nanoparticle loading.

Relaxation Behaviors of Polystyrene during Physical Aging

2012 ◽  
Vol 557-559 ◽  
pp. 1479-1482
Author(s):  
Yao Liu ◽  
Cong De Qiao ◽  
Jin Shui Yao ◽  
Wen Ke Yang
Keyword(s):  
Relaxation Process ◽  
Aging Time ◽  
Fluorescence Spectrum ◽  
Physical Aging ◽  
Enthalpy Relaxation ◽  
Polymer Chains ◽  
Variation Trend ◽  
Kinetics Of

The relaxation behaviors of PS below Tg and its variation trend along with aging time were studied by DSC, fluorescence spectrum and XRD. On the basis of DSC results, the kinetics of the volume and enthalpy relaxation process were analyzed, and the influence of the aging time on the relaxation behaviors were discussed. The results of fluorescence spectrum and XRD indicated the presence of the rearrangement of polymer chains in the physical aging of polystyrene.

Detection of intracellular silver nanoparticles using flow cytometry

2018 ◽  
pp. 223-226
Author(s):  
С.И. Каба ◽  
А.А. Соколовская
Keyword(s):  
Flow Cytometry ◽  
Silver Nanoparticles ◽  
Endothelial Cells ◽  
Silver Nanoparticle ◽  
Cell Uptake ◽  
Control Samples

Продемонстрировано обнаружение наночастиц серебра во внутриклеточном пространстве с помощью проточной цитофлуориметрии. В эндотелиальных клетках линии EA.hy926, инкубированных в растворе, содержащем 2 мкг/мл наносеребра, измеряли боковое светорассеяние. По сравнению с контрольными образцами этот параметр возрастал, в то время как прочие значимые характеристики не изменялись. Это подтверждает чувствительность метода к изменившемуся состоянию клеток и указывает на поглощение наночастиц серебра клетками при концентрации ниже токсической. The study demonstrated a possibility for detection of intracellular silver nanoparticles using flow cytometry. The parameter used in this work, side scattering, was measured in EA.hy926 endothelial cells incubated in a 2 mg/ml silver nanoparticle solution. This parameter was increased compared to control samples. Therefore, this technique was sensitive to changes in the cell status and suggested the cell uptake of the particles under the subtoxic conditions.

scholarly journals Silver nanoparticle-graphene oxide mixture as anti-bacterial against Staphylococcus aureus

2019 ◽  
Author(s):  
Wipsar Sunu Brams Dwandaru ◽  
Afrizal Lathiful Fadli ◽  
Dani Rahmawati Hakim ◽  
Absari Hanifah ◽  
Emi Kurnia Sari
Keyword(s):  
Staphylococcus Aureus ◽  
Graphene Oxide ◽  
Silver Nanoparticle ◽  
Oxide Mixture
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