TY  - JOUR
A1  - Thielke, Michael W.
A1  - Secker, Christian
A1  - Schlaad, Helmut
A1  - Theato, Patrick
T1  - Electrospinning of Crystallizable Polypeptoid Fibers
JF  - Macromolecular rapid communications
N2  - A unique fabrication process of low molar mass, crystalline polypeptoid fibers is described. Thermoresponsive fiber mats are prepared by electrospinning a homogeneous blend of semicrystalline poly(N-(n-propyl) glycine) (PPGly; 4.1 kDa) with high molar mass poly(ethylene oxide) (PEO). Annealing of these fibers at approximate to 100 degrees C selectively removes the PEO and produces stable crystalline fiber mats of pure PPGly, which are insoluble in aqueous solution but can be redissolved in methanol or ethanol. The formation of water-stable polypeptoid fiber mats is an important step toward their utilization in biomedical applications such as tissue engineering or wound dressing.
KW  - biomaterials
KW  - crystallization
KW  - electrospinning
KW  - polypeptoids
KW  - thermoresponsive
Y1  - 2016
U6  - https://doi.org/10.1002/marc.201500502
SN  - 1022-1336
SN  - 1521-3927
VL  - 37
SP  - 100
EP  - 104
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Zou, Hua
A1  - Schlaad, Helmut
T1  - Thermoresponsive PNIPAM/Silica Nanoparticles by Direct Photopolymerization in Aqueous Media
JF  - Journal of polymer science : A, Polymer chemistry
N2  - This article presents a simple and facile method to fabricate thermoresponsive polymer-grafted silica particles by direct surface-initiated photopolymerization of N-isopropylacrylamide (NIPAM). This method is based on silica particles bearing thiol functionalities, which are transformed into thiyl radicals by irradiation with UV light to initiate the polymerization of NIPAM in aqueous media at room temperature. The photopolymerization of NIPAM could be applied to smaller thiol-functionalized particles (approximate to 48 nm) as well as to larger particles (approximate to 692 nm). Hollow poly(NIPAM) capsules could be formed after etching away the silica cores from the composite particles. It is possible to produce tailor-made composite particles or capsules for particular applications by extending this approach to other vinyl monomers. (c) 2015 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 2015, 53, 1260-1267
KW  - nanocomposites
KW  - nanoparticles
KW  - photopolymerization
KW  - silica nanoparticles
KW  - surface-initiated photopolymerization
KW  - thermoresponsive
KW  - thiol
Y1  - 2015
U6  - https://doi.org/10.1002/pola.27593
SN  - 0887-624X
SN  - 1099-0518
VL  - 53
IS  - 10
SP  - 1260
EP  - 1267
PB  - Wiley-Blackwell
CY  - Hoboken
ER  -