Preparation and characterization of surface grafting polymer of ZrO2 membrane and ZrO2 powder

2019 ◽  
Vol 471 ◽  
pp. 394-402 ◽  
Author(s):  
Dan Li ◽  
Jie Yao ◽  
Bing Liu ◽  
Hao Sun ◽  
Sjack van Agtmaal ◽  
...  
Keyword(s):  
Surface Grafting ◽  
Zro2 Powder

Characterization of electrospun polylactide nanofibers modified via atom transfer radical polymerization

2020 ◽  
pp. 152808372093038 ◽  
Author(s):  
Muhammad Mushtaq ◽  
Rahim Jindani ◽  
Amjad Farooq ◽  
Xin Li ◽  
Hina Saba ◽  
...  
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Photoelectron Spectroscopy ◽  
Polymer Chains ◽  
Surface Grafting ◽  
Atom Transfer ◽  
X Ray ◽  
Polymerization Method ◽  
Scanning Electron

Polylactic acid-based membranes received considerable attention due to its novel biocompatibility, renewability, and biodegradability. In this study, PLA electrospun nanofibrous membrane was prepared and 2-dimethylaminoethyl methacrylate (DMAEMA) was used as a monomer for surface grafting of polymer chains via the atom transfer radical polymerization method. Then the PLA nanofibers were quaternized by using bromoethane. The characterization of poly(DMAEMA) graft PLA nanofiber (poly(DMAEMA)-g-PLA) membranes was done by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and energy dispersive X-ray spectroscopy. The results showed that the diameter of PLA nanofibers increased 15% as the concentration increased from 10% to 12% and then increased 23% as the concentration of PLA solution increased from 10% to 15%. But the regularity of average diameters is best achieved at 12% concentration.

Surface Grafting Modification of Silk Fibroin via ARGET ATRP Method

2011 ◽  
Vol 175-176 ◽  
pp. 608-613 ◽  
Author(s):  
Xia Xu ◽  
Tie Ling Xing ◽  
Guo Qiang Chen
Keyword(s):  
Electron Transfer ◽  
Vitamin C ◽  
Monomer Concentration ◽  
Reducing Agent ◽  
Surface Grafting ◽  
Grafting Modification ◽  
Arget Atrp ◽  
Ft Ir ◽  
Recovery Angle

In this work, silk was grafted using dimethylaminoethyl methacrylate(DMAEMA) via activators regenerated by electron transfer for atom transfer radical polymerization (ARGET ATRP) method to produce well controlled grafted silk in water aqueous. CuBr2 was used as catalyst, N, N, N’, N", N" -pentamethyldiethylenetriamine (PMDETA) was used as ligand, vitamin C was used as reducing agent. The effects of monomer concentration, the proportion of catalyst and ligand, the variety and the dosage of catalyst and reducing agent, grafting temperature and time on the silk grafting were discussed, and the optimal grafting technology was obtained. FT-IR characterization of the grafted silk indicated that DMAEMA was grafted onto the surface of silk. The whiteness and permeability to gas of grafted silk slightly decreased. And the moisture permeability of grafted silk nearly had no change. The wrinkle recovery angle of grafted silk dramatically increased.

Characterization of nano-sized ZrO2 powder

1993 ◽  
Vol 74 (1) ◽  
pp. 7-12 ◽  
Author(s):  
J.L. Shi ◽  
Z.X. Lin
Keyword(s):  
Zro2 Powder

Characterization of silane-modified ZrO2 powder surfaces

1997 ◽  
Vol 25 (12) ◽  
pp. 917-923 ◽  
Author(s):  
M. R. Turner ◽  
E. Duguet ◽  
C. Labrug�re
Keyword(s):  
Zro2 Powder

Characterization of Bone Cell Behaviors on Collagen Grafted Hydroxyapatite Surfaces

2007 ◽  
Vol 361-363 ◽  
pp. 1143-1146
Author(s):  
S. Chun ◽  
D.H. Shin ◽  
I.K. Kang ◽  
M.W. Ahn ◽  
Suk Young Kim
Keyword(s):  
Cell Adhesion ◽  
Fetal Bovine Serum ◽  
Bone Cell ◽  
Major Constituent ◽  
Surface Grafting ◽  
Connective Tissues ◽  
Coating Materials ◽  
Cell Behaviors ◽  
Fetal Bovine

In order to enhance bone cell adhesion on hydroxyapatite (HA), collagen was used as a surface-grafting material on HA substrates because the collagen is a major constituent of connective tissues and has been regarded as one of the most excellent coating materials for bone bonding. First, HA disks (10mmΦ x 1mm) were prepared and then collagen was immobilbized on the HA surface using an 3-APTES coupling agent on HA disk surfaces. MC3T3-E1 osteoblasts were seeded on the collagen-grafted and non-grated HA disks and cultured in a Dulbecco’s modified eagle medium containing 10% fetal bovine serum for 4 hrs to evaluate the cell adhesion on the HA samples. The osteoblasts on the collagen-grafted sample were more spread than those on the non-grafted sample. It is believed that collagen-grafted HA surface provides suitable sites for cell attaching due to the high biocompatibility of collagen

Morphological Characterization of Mycobacteriophage R1

1974 ◽  
Vol 32 ◽  
pp. 254-255
Author(s):  
B. L. Soloff ◽  
T. A. Rado
Keyword(s):  
Carbon Source ◽  
Stationary Phase ◽  
Growth Phase ◽  
Minimal Medium ◽  
Morphological Characterization ◽  
Logarithmic Growth Phase ◽  
Complete Lysis ◽  
Lysogenic Culture ◽  
Logarithmic Growth

Mycobacteriophage R1 was originally isolated from a lysogenic culture of M. butyricum. The virus was propagated on a leucine-requiring derivative of M. smegmatis, 607 leu−, isolated by nitrosoguanidine mutagenesis of typestrain ATCC 607. Growth was accomplished in a minimal medium containing glycerol and glucose as carbon source and enriched by the addition of 80 μg/ ml L-leucine. Bacteria in early logarithmic growth phase were infected with virus at a multiplicity of 5, and incubated with aeration for 8 hours. The partially lysed suspension was diluted 1:10 in growth medium and incubated for a further 8 hours. This permitted stationary phase cells to re-enter logarithmic growth and resulted in complete lysis of the culture.

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