scholarly journals Substrate-independent three-dimensional polymer nanosheets induced by solution casting

2021 ◽  
Author(s):  
Cheol Hun Park ◽  
Eun Min Go ◽  
Kyung Min Lee ◽  
Chang Soo Lee ◽  
Sang Kyu Kwak ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Simple Solution ◽  
Solution Casting ◽  
Solvent Interactions ◽  
Comb Copolymer ◽  
Substrate Independent ◽  
Polymer Solvent

Unprecedented substrate-independent polymeric 3D nanosheets were induced via simple solution casting using PEGBEM–POEM comb copolymer. A possible mechanism is the change in the polymer–solvent interactions on the surface.

scholarly journals Substrate-independent immunomodulatory characteristics of mesenchymal stem cells in three-dimensional culture

PLoS ONE ◽  
2018 ◽  
Vol 13 (11) ◽  
pp. e0206811 ◽  
Author(s):  
Jing Li ◽  
Tong Chen ◽  
Xiahe Huang ◽  
Yunshan Zhao ◽  
Bin Wang ◽  
...  
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Three Dimensional ◽  
Three Dimensional Culture ◽  
Substrate Independent

scholarly journals Characterization of Three-Dimensional Printed Composite Scaffolds Prepared with Different Fabrication Methods

2016 ◽  
Vol 61 (2) ◽  
pp. 645-650 ◽  
Author(s):  
K. Szlązak ◽  
J. Jaroszewicz ◽  
B. Ostrowska ◽  
T. Jaroszewicz ◽  
M. Nabiałek ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Fused Deposition Modeling ◽  
Testing Machine ◽  
Three Dimensional ◽  
Gravimetric Analysis ◽  
Solution Casting ◽  
Micro Computed Tomography ◽  
Optimal Method ◽  
Fused Deposition ◽  
Material Testing Machine

Abstract An optimal method for composites preparation as an input to rapid prototyping fabrication of scaffolds with potential application in osteochondral tissue engineering is still needed. Scaffolds in tissue engineering applications play a role of constructs providing appropriate mechanical support with defined porosity to assist regeneration of tissue. The aim of the presented study was to analyze the influence of composite fabrication methods on scaffolds mechanical properties. The evaluation was performed on polycaprolactone (PCL) with 5 wt% beta-tricalcium phosphate (TCP) scaffolds fabricated using fused deposition modeling (FDM). Three different methods of PCL-TCP composite preparation: solution casting, particles milling, extrusion and injection were used to provide material for scaffold fabrication. The obtained scaffolds were investigated by means of scanning electron microscope, x-ray micro computed tomography, thermal gravimetric analysis and static material testing machine. All of the scaffolds had the same geometry (cylinder, 4×6 mm) and fiber orientation (0/60/120°). There were some differences in the TCP distribution and formation of the ceramic agglomerates in the scaffolds. They depended on fabrication method. The use of composites prepared by solution casting method resulted in scaffolds with the best combination of compressive strength (5.7±0.2 MPa) and porosity (48.5±2.7 %), both within the range of trabecular bone.

Hierarchically featured and substrate independent bulk-deposition of ‘reactive’ polymeric nanocomplexes for controlled and strategic manipulation of durable biomimicking wettability

2018 ◽  
Vol 6 (15) ◽  
pp. 6642-6653 ◽  
Author(s):  
Kousik Maji ◽  
Uttam Manna
Keyword(s):  
Addition Reaction ◽  
Spray Deposition ◽  
Three Dimensional ◽  
Conjugate Addition ◽  
Deposition Process ◽  
Bulk Deposition ◽  
Strategic Manipulation ◽  
Substrate Independent

Three-dimensional, controlled and covalent chemical optimization is introduced through strategic exploitation of a facile 1,4-conjugate addition reaction and a scalable spray deposition process for synthesizing durable biomimicked interfaces.

Surface and kinetic effects in gas chromatographic studies of polystyrene

1976 ◽  
Vol 54 (22) ◽  
pp. 3496-3507 ◽  
Author(s):  
Gregory J. Courval ◽  
Derek G. Gray
Keyword(s):  
Sample Size ◽  
Flow Rate ◽  
Retention Volume ◽  
Rate Dependence ◽  
Retention Data ◽  
Scanning Electron Micrographs ◽  
Linear Absorption ◽  
Solvent Interactions ◽  
Non Linear ◽  
Polymer Solvent

Considerable variation in the measurement of polymer–solvent interactions using gc retention data may occur due to kinetic factors, surface excess concentrations of probe vapour, and non-linear partition isotherms. The kinetic factors, which appear as a flow rate dependence of the retention volume, are analysed in terms of a previously reported theoretical model for retention on polymeric stationary phases passing through the glass transition. The predicted linear extrapolations to zero flow rate are obtained for the retention of n-tetradecane on polystyrene. The variation of this flow rate dependence with temperature and with the thickness of the stationary phase are also in qualitative agreement with the theory. A simplified model for the effect of loading on the retention diagram is presented. Non-linear absorption and bulk sorption isotherms result in a dependence of retention volume on sample size, necessitating an extrapolation of the measured retention volumes to zero peak height. The temperature variation of the flow rate dependence, the effect of loading, and the effect of sample size on retention volume are all further complicated by uneven distribution of polymer on support. From scanning electron micrographs of the beads it is evident that 'beading up' of the polystyrene on the glass surface may occur at low loadings, resulting in a non-uniform coating with large areas of the beads uncoated. It is concluded that in order to obtain reliable data on polymer–solvent interactions using gas chromatography, all of the above-mentioned factors must be considered.

Evanescent-Wave Cavity Ring-Down Investigation of Polymer/Solvent Interactions

2005 ◽  
Vol 109 (15) ◽  
pp. 7435-7442 ◽  
Author(s):  
Theresa E. Hannon ◽  
Soonwoo Chah ◽  
Richard N. Zare
Keyword(s):  
Evanescent Wave ◽  
Solvent Interactions ◽  
Polymer Solvent ◽  
Cavity Ring Down

Tuning the Morphology of All-Polymer OPVs through Altering Polymer–Solvent Interactions

2014 ◽  
Vol 26 (17) ◽  
pp. 5020-5027 ◽  
Author(s):  
Eleni Pavlopoulou ◽  
Chang Su Kim ◽  
Stephanie S. Lee ◽  
Zhihua Chen ◽  
Antonio Facchetti ◽  
...  
Keyword(s):  
Solvent Interactions ◽  
Polymer Solvent
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