Morphology of poly(ɛ-caprolactone)-b-poly(ethylene glycol)-b-poly(ɛ-caprolactone) assemblies in diluted aqueous solution and gel studied by atomic force microscopy

2008 ◽  
Author(s):  
Shengrong Guo ◽  
Yaqiong Zhang ◽  
Zhang Yu
Keyword(s):  
Aqueous Solution ◽  
Atomic Force Microscopy ◽  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
Force Microscopy ◽  
Atomic Force ◽  
Poly Ethylene

Modification of poly(vinyl alcohol) membrane via blending with poly(γ-benzyl l-glutamate)-block-poly(ethylene glycol) copolymer

2010 ◽  
Vol 64 (6) ◽  
Author(s):  
Guo-Quan Zhu ◽  
Qiao-Chun Gao ◽  
Zhi-He Li ◽  
Fa-Gang Wang ◽  
Hua Zhang
Keyword(s):  
Ethylene Glycol ◽  
Vinyl Alcohol ◽  
Chemical Properties ◽  
Poly Vinyl Alcohol ◽  
Poly Ethylene Glycol ◽  
Force Microscopy ◽  
Atomic Force ◽  
Fourier Transformation Infrared Spectroscopy ◽  
Blend Membranes ◽  
Poly Ethylene

AbstractA series of poly(vinyl alcohol) (PVA)/poly(γ-benzyl l-glutamate)-block-poly(ethylene glycol) (PBLG-b-PEG) blend membranes with different PVA/PBLG-b-PEG mole ratios were prepared by pervaporation. Structure and morphologies of PVA/PBLG-b-PEG blend membranes were investigated using Fourier transformation infrared spectroscopy (FTIR), and atomic force microscopy (AFM). Mechanical and chemical properties of PVA/PBLG-b-PEG blend membrane were studied by tensile testing and other physical methods. It was revealed that the introduction of PBLG-b-PEG copolymer has significant effect on the properties of a PVA membrane.

scholarly journals A Simple Method for Patterning Nanoparticles on Planar Surfaces

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Getachew Tizazu
Keyword(s):  
Ethylene Glycol ◽  
Topographic Image ◽  
Poly Ethylene Glycol ◽  
Functionalized Nanoparticles ◽  
Simple Method ◽  
Force Microscopy ◽  
Planar Surfaces ◽  
Atomic Force ◽  
Surface Patterns ◽  
Poly Ethylene

This paper describes a simple method to pattern nanoparticles on planar surfaces using the antifouling property of poly(ethylene glycol) monolayers deposited from a solution on the native oxide of titanium. Atomic force microcopy was used to pattern the poly(ethylene glycol) monolayers producing protein active sites on the protein-resistant surface. Patterns with different sizes have been generated by shaving the monolayers with different repetitions. Friction force microscopy was used to image the patterns. The smallest patterns are 50 nm and the largest patterns are 500 nm at full width half maximum. The smallest pattern was produced with one shave, whereas the largest pattern was produced by shaving the monolayers 112 times. Protein-coated nanoparticles were immobilised on the shaved (protein active) part of the monolayers by dipping the patterned samples into a solution that contains 2% by volume protein-functionalized nanoparticles with a nominal diameter of 40 nm. Atomic force microscopy was used to take a topographic image of the samples. The topographic image showed that the protein-functionalized nanoparticles were attached onto the shaved part of the substrate but not on the poly(ethylene glycol)-covered part of the substrate. The level of aggregation of the nanoparticles was also investigated from the topographic image. The section analysis of the topographic image of the nanoparticle patterns showed a height of 40 nm which proved that only a monolayer of particles were deposited on the shaved part of the monolayer.

Properties of a poly(ethylene glycol)-block-poly(γ-benzyl l-glutamate)-graft-poly(ethylene glycol) copolymer membrane

2010 ◽  
Vol 64 (1) ◽  
Author(s):  
Guo-Quan Zhu
Keyword(s):  
Ethylene Glycol ◽  
Chemical Properties ◽  
Poly Ethylene Glycol ◽  
Force Microscopy ◽  
Grafting Ratio ◽  
Atomic Force ◽  
Ester Exchange ◽  
Ester Exchange Reaction ◽  
Poly Ethylene ◽  
And Chemical Properties

AbstractPoly(ethylene glycol)-block-poly(γ-benzyl l-glutamate)-graft-poly(ethylene glycol) (PEG-block-PBLG-graft-PEG) copolymer was synthesized by the ester exchange reaction of PBLG-block-PEG copolymer with a PEG chain. Surface morphology of the PEG-block-PBLG-graft-PEG copolymer membrane was characterized by atomic force microscopy (AFM). Mechanical and chemical properties of the PEG-block-PBLG-graft-PEG copolymer membrane were investigated by tensile testing and contact angle testing. The effects of grafting ratio on the properties of PEG-block-PBLG-graft-PEG copolymer membrane were primarilly studied.

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