Chemical modification of rubber wood with styrene and glycidyl methacrylate

2008 ◽  
Vol 29 (11) ◽  
pp. 1258-1262 ◽  
Author(s):  
Rashmi R. Devi ◽  
Tarun K. Maji
Keyword(s):  
Chemical Modification ◽  
Glycidyl Methacrylate ◽  
Rubber Wood

scholarly journals Cytocompatibility of Modified Silk Fibroin with Glycidyl Methacrylate for Tissue Engineering and Biomedical Applications

Biomolecules ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 35
Author(s):  
Heesun Hong ◽  
Ok Joo Lee ◽  
Young Jin Lee ◽  
Ji Seung Lee ◽  
Olatunji Ajiteru ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Chemical Modification ◽  
Silk Fibroin ◽  
Glycidyl Methacrylate ◽  
Biomedical Applications ◽  
Biological Assessment ◽  
Biological Damage ◽  
Encapsulated Cells ◽  
Chemical Residues ◽  
Β Sheet

Hydrogel with chemical modification has been used for 3D printing in the biomedical field of cell and tissue-based regeneration because it provides a good cellular microenvironment and mechanical supportive ability. As a scaffold and a matrix, hydrogel itself has to be modified chemically and physically to form a β-sheet crosslinking structure for the strength of the biomaterials. These chemical modifications could affect the biological damage done to encapsulated cells or surrounding tissues due to unreacted chemical residues. Biological assessment, including assessment of the cytocompatibility of hydrogel in clinical trials, must involve testing with cytotoxicity, irritation, and sensitization. Here, we modified silk fibroin and glycidyl methacrylate (Silk-GMA) and evaluated the physical characterizations, residual chemical detection, and the biological effect of residual GMA depending on dialysis periods. Silk-GMA depending on each dialysis period had a typical β-sheet structure in the characterization analysis and residual GMA decreased from dialysis day 1. Moreover, cell proliferation and viability rate gradually increased; additionally, necrotic and apoptotic cells decreased from dialysis day 2. These results indicate that the dialysis periods during chemical modification of natural polymer are important for removing unreacted chemical residues and for the potential application of the manufacturing standardization for chemically modified hydrogel for the clinical transplantation for tissue engineering and biomedical applications.

Chemical modification of glycidyl methacrylate polymers with 4-hydroxy-4′-methoxybiphenyl groups

1998 ◽  
Vol 34 (7) ◽  
pp. 1039-1045 ◽  
Author(s):  
D Navarro-Rodriguez ◽  
F.J Rodriguez-Gonzalez ◽  
J Romero-Garcia ◽  
E.J Jimenez-Regalado ◽  
D Guillon
Keyword(s):  
Chemical Modification ◽  
Glycidyl Methacrylate ◽  
Methacrylate Polymers

SPE of Phenols on New Amine - Based Copolymers

2014 ◽  
Vol 605 ◽  
pp. 173-176
Author(s):  
Magdalena Sobiesiak ◽  
Beata Podkościelna
Keyword(s):  
Phenolic Compounds ◽  
Chemical Modification ◽  
Water Purification ◽  
Primary Amine ◽  
Glycidyl Methacrylate ◽  
Active Sites ◽  
Polymer Surface ◽  
Porous Polymers ◽  
Purification Process ◽  
Amine Groups

Porous microspheres, copolymers: bis [4(2-hydroxy-3-methacryloyloxypropoxy)-phenysulfide (BES.DM) and glycidyl methacrylate (GMA) have been prepared by suspension-emulsion polymerization. The copolymer (BES.DM+GMA) including reactive epoxide rings was modified with three amines: butylenediamine (BDA), diethylenetriamine (DETA), triethylenetetramine (TETA). Next, attachment of HCO3- species to the primary amine groups took place.The prepared porous polymers were used as adsorbents in off-line SPE experiments. A mixture of phenol (PH), 2-chlorophenol (ChP), 2,4-dichlorophenol (DChP) and 2,4,6-trichlorophenol (TChP) as testing compounds was applied.Depending on the way of chemical modification, the prepared adsorbents possessed diverse sorption properties towards the testing compounds. Competition of the phenolic compounds for active sites presented on the polymer surface was observed. The most effective in water purification process were polymers possessing both amine and bicarbonate groups. The best recovery results were obtained for 2,4-dichlorophenol.

Photoconductivity in Vacuum Deposited Films of Silicon-Based Polymers

1996 ◽  
Vol 444 ◽  
Author(s):  
H. Okumoto ◽  
M. Shimomura ◽  
N. Minami ◽  
Y. Tanabe
Keyword(s):  
Charge Transfer ◽  
Chemical Modification ◽  
Electronic Transport ◽  
Hole Transport ◽  
Electron Acceptors ◽  
Oxygen Atmosphere ◽  
Dangling Bonds ◽  
Silicon Based ◽  
Deposited Films

AbstractSilicon-based polymers with σconjugated electrons have specific properties; photoreactivity for microlithography and photoconductivity for hole transport materials. To explore the possibility of combining these two properties to develop photoresists with electronic transport capability, photoconductivity of polysilanes is investigated in connection with their photoinduced chemical modification. Increase in photocurrent is observed accompanying photoreaction of poly(dimethylsilane) vacuum deposited films. This increase is found to be greatly enhanced in oxygen atmosphere. Such changes of photocurrent can be explained by charge transfer to electron acceptors from Si dangling bonds postulated to be formed during photoreaction.

Sign in / Sign up

Export Citation Format

Share Document