Hyperbranched Surface Graft Polymerizations

Bergbreiter, David E.; Kippenberger, Andrew M.

doi:10.1007/12_059

Cited by 20 publications

(8 citation statements)

References 94 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…So far, hyperbranched polymers have been introduced into the membrane material to impact gas permeation properties [ 28 , 29 , 30 , 31 , 32 ]. Diverse methods have been developed to create hyperbranched polymer structures on top of polymer surfaces including neutral, alkaline, or acidic end groups [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ]. Since some of these structures can be generated in a step-wise manner by growing generations successively, the density of functional groups can be controlled by the number of generations that is developed.…”

Section: Introductionmentioning

confidence: 99%

Membrane Functionalization with Hyperbranched Polymers

2016

View full text Add to dashboard Cite

Polymer membranes have been modified with hyperbranched polymers with the aim to generate a high density of hydrophilic functional groups at the membrane surface. For this purpose hyperbranched polymers containing amino, alcohol, and carboxylic acid end groups were used for membrane modification, respectively. Thus, surface potential and charges were changed significantly to result in attractive or repulsive interactions towards three different proteins (albumin, lysozyme, myoglobin) that were used to indicate membrane fouling properties. Our studies demonstrated that hydrophilization alone is not effective for avoiding membrane fouling when charged proteins are present. In contrast, electrostatic repulsion seems to be a general key factor.

show abstract

Section: Introductionmentioning

confidence: 99%

Membrane Functionalization with Hyperbranched Polymers

2016

View full text Add to dashboard Cite

show abstract

“…Such methods include the “grafted from” with initiators − or monomers , initially anchored to the surface or the “grafted onto”, where a preformed polymer is covalently linked to the surface. , A great variety of polymers have been successfully anchored to inorganic surfaces by such methods. In particular, poly(acrylic acid) (PAA) has been grafted via reversible addition−fragmentation chain-transfer (RAFT) living polymerization onto TiO 2 nanoparticles, by electrochemical polymerization onto titanium substrates, with gradual variation of chain grafting densities on flat silica, and as hyperbranched PAA onto both gold surfaces and gold-coated porous alumina supports . PAA is a well-known biocompatible polymer, used as a polyelectrolyte in different biomedical applications. , Moreover, the carboxylic groups present in its backbone allow it to be functionalized with bioactive molecules such as drugs. , …”

Section: Introductionmentioning

confidence: 99%

Grafting of Poly(acrylic acid) onto an Aluminum Surface

et al. 2009

View full text Add to dashboard Cite

Grafting of poly(acrylic acid) (PAA) onto an aluminum surface was successfully achieved by free radical polymerization of acrylic acid using typical radical initiators, benzoyl peroxide and 2,2 0 -azobisisobutyronitrile. Both spotlike and brush morphologies were achieved. A complete coverage of PAA on an aluminum surface was then achieved by using a thermal chemical vapor deposition process. The PAA thickness was determined by ellipsometry and the superficial chemical composition by X-ray photoelectron spectroscopy (XPS). Grazing angle Fourier transform infrared (FTIR) spectroscopy confirmed the presence of carboxylic acid groups on the surface, and the contact angle measurements revealed a decreasing free surface energy of aluminum due to the polymer surface covering.

show abstract

“…Multiarm star polymers are the macromolecules with three‐dimensional structure, in which a large number of linear arms with similar molecular weight (MW) and narrow polydispersity index (PDI) were emanated from a central core 1–9. It attracts increasing interest because of its compact structure, which may lead to peculiar rheological properties 10.…”

Section: Introductionmentioning

confidence: 99%

Preparation of star polymers of hyperbranched polyglycerol core with multiarms of PS‐b‐PtBA and PS‐b‐PAA

Liu

Wang

Zhang

et al. 2008

J of Applied Polymer Sci

View full text Add to dashboard Cite

Atom transfer radical polymerization (ATRP) was applied to synthesize a new kind of star polymers of hyperbranched polyglycerol (HPG) core with multiarms of PS-b-PtBA and PS-b-PAA by using the ''core first'' technique. The HPG core was obtained by anionic polymerization of glycerol first, and then the pendant hydroxyl groups of HPG were esterified with 2-bromoisobutyryl bromide to yield the HPG-g-Br, which was used as macroinitiator for ATRP of the first monomer (St) and then second monomer (tBA). After hydrolysis of the PtBA block, poly(acrylic acid) (PAA) side chains were formed. The final products and intermediates were characterized by GPC, NMR, and FTIR in detail.

show abstract

Hyperbranched Surface Graft Polymerizations

Cited by 20 publications

References 94 publications

Membrane Functionalization with Hyperbranched Polymers

Membrane Functionalization with Hyperbranched Polymers

Grafting of Poly(acrylic acid) onto an Aluminum Surface

Preparation of star polymers of hyperbranched polyglycerol core with multiarms of PS‐b‐PtBA and PS‐b‐PAA

Contact Info

Product

Resources

About