Contact angles of surfactants with a potential to alter the body distribution of colloidal drug carriers on poly (methyl methacrylate) surfaces

1988 ◽  
Vol 45 (1-2) ◽  
pp. 91-100 ◽  
Author(s):  
S.D. Tröster ◽  
J. Kreuter
Keyword(s):  
Methyl Methacrylate ◽  
Drug Carriers ◽  
Contact Angles ◽  
The Body ◽  
Poly Methyl Methacrylate ◽  
Body Distribution ◽  
Colloidal Drug Carriers

scholarly journals Preparation of hydrophobic nanofibers by electrospinning of PMMA dissolved in 2-propanol and water

2019 ◽  
Vol 264 ◽  
pp. 03004 ◽  
Author(s):  
Hui-Yi Chang ◽  
Chao-Ching Chang ◽  
Liao-Ping Cheng
Keyword(s):  
Methyl Methacrylate ◽  
Room Temperature ◽  
Water Resistance ◽  
Environmentally Friendly ◽  
Solution Concentration ◽  
Contact Angles ◽  
Poly Methyl Methacrylate ◽  
Submicron Scale

In this study, we adopted rubbing alcohol (2-propanol/water = 7.8/2) as the solvent to prepare hydrophobic poly(methyl methacrylate) (PMMA) nanofibers (with submicron scale diameters) by electrospinning. In the literature, the general solvents, such as acetone, tetrahydrofuran, chloroform, toluene, etc., to dissolve PMMA are harmful and not environmentally friendly. 2-Propanol and water are both not hazardous to humans and the environment. PMMA dissolved in rubbing alcohol can be electrospun near room temperature. The solutions were heated at ~60 °C and allowed to cool to room temperature. Controlling the solution concentration and electrospinning parameters, fibers with diameters of 0.65~0.85 μm were obtained. The electrospun PMMA mats were hydrophobic with contact angles > 130 ° and showed good water resistance.

scholarly journals Aluminium trihydrate-filled poly(methyl methacrylate) (PMMA/ATH) waste powder utilization in wood-plastic composite boards bonded by MUF resin

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 3252-3269
Author(s):  
Matej Vovk ◽  
Milan Šernek
Keyword(s):  
Surface Modification ◽  
Methyl Methacrylate ◽  
Photoelectron Spectroscopy ◽  
Urea Formaldehyde ◽  
Contact Angles ◽  
Modulus Of Rupture ◽  
Wood Plastic Composite ◽  
Silane Coupling Agents ◽  
Poly Methyl Methacrylate ◽  
Plastic Composite

An alternative approach to producing a wood-plastic composite (WPC) from wood particles, aluminium trihydrate-filled poly(methyl methacrylate) (PMMA/ATH) waste powder, and melamine-urea-formaldehyde (MUF) resin is described. The surface of PMMA/ATH powder was modified with ureido- and amino-functional silane coupling agents at four different degrees of modification: 0.3%, 0.5%, 1.0%, and 2.0%. An X-ray photoelectron spectroscopy (XPS) analysis was executed on a silane-modified PMMA/ATH material, and the results revealed the presence of chemically bonded silanes on the PMMA/ATH surface. Contact angle measurements were also performed to calculate the surface free energies of the modified powders. Water contact angles of modified powders slightly decreased as surface free energy increased with the degree of surface modification. Mechanical tests of the composites showed that different degrees of surface modification had a significant influence on modulus of elasticity (MOE) and modulus of rupture (MOR) of the composite boards. However, there were no significant differences between the silanes used.

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