Effects of the diluent mixing ratio and conditions of the thermally induced phase-separation process on the pore size of microporous polyethylene membranes

2008 ◽  
Vol 108 (5) ◽  
pp. 3154-3162 ◽  
Author(s):  
S. H. Yoo ◽  
C. K. Kim
Keyword(s):  
Phase Separation ◽  
Pore Size ◽  
Separation Process ◽  
Mixing Ratio ◽  
Thermally Induced Phase Separation ◽  
Thermally Induced ◽  
Phase Separation Process

scholarly journals The Effect of Pore Size Distribution and l-Lysine Modified Apatite Whiskers (HAP) on Osteoblasts Response in PLLA/HAP Foam Scaffolds Obtained in the Thermally Induced Phase Separation Process

2021 ◽  
Vol 22 (7) ◽  
pp. 3607
Author(s):  
Konrad Szustakiewicz ◽  
Marcin Włodarczyk ◽  
Małgorzata Gazińska ◽  
Karolina Rudnicka ◽  
Przemysław Płociński ◽  
...  
Keyword(s):  
Phase Separation ◽  
Pore Size ◽  
Separation Process ◽  
Thermally Induced Phase Separation ◽  
Compression Tests ◽  
Thermally Induced ◽  
Salt Leaching ◽  
Lysine Modification ◽  
Phase Separation Process ◽  
Significant Stimulatory Effect

In this research, we prepared foam scaffolds based on poly(l-lactide) (PLLA) and apatite whiskers (HAP) using thermally induced phase separation technique supported by the salt leaching process (TIPS-SL). Using sodium chloride having a size of (a) 150–315 μm, (b) 315–400 μm, and (c) 500–600 μm, three types of foams with different pore sizes have been obtained. Internal structure of the obtained materials has been investigated using SEM as well as μCT. The materials have been studied by means of porosity, density, and compression tests. As the most promising, the composite prepared with salt size of 500–600 μm was prepared also with the l-lysine modified apatite. The osteoblast hFOB 1.19 cell response for the scaffolds was also investigated by means of cell viability, proliferation, adhesion/penetration, and biomineralization. Direct contact cytotoxicity assay showed the cytocompatibility of the scaffolds. All types of foam scaffolds containing HAP whiskers, regardless the pore size or l-lysine modification induced significant stimulatory effect on the cal-cium deposits formation in osteoblasts. The PLLA/HAP scaffolds modified with l-lysine stimulated hFOB 1.19 osteoblasts proliferation. Compared to the scaffolds with smaller pores (150–315 µm and 315–400 µm), the PLLA/HAP foams with large pores (500–600 µm) promoted more effective ad-hesion of osteoblasts to the surface of the biomaterial.

scholarly journals A polyethersulfone–bisphenol sulfuric acid hollow fiber ultrafiltration membrane fabricated by a reverse thermally induced phase separation process

RSC Advances ◽  
2018 ◽  
Vol 8 (14) ◽  
pp. 7800-7809 ◽  
Author(s):  
Sheng-Hui Liu ◽  
Min Liu ◽  
Zhen-Liang Xu ◽  
Yong-Ming Wei
Keyword(s):  
Phase Separation ◽  
Sulfuric Acid ◽  
Hollow Fiber ◽  
Hollow Fiber Membrane ◽  
Ultrafiltration Membrane ◽  
Separation Process ◽  
Thermally Induced Phase Separation ◽  
Fiber Membrane ◽  
Thermally Induced ◽  
Phase Separation Process

A novel antifouling polyethersulfone (PES) hollow fiber membrane was modified by the addition of bisphenol sulfuric acid (BPA-PS) using a reverse thermally induced phase separation (RTIPS) process.

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