Functionalized track-etched membranes as versatile tool to investigate stimuli-responsive polymers for “smart” nano- and microsystems

Ulbricht, Mathias; Özdemir, Songül; Geismann, Christian

doi:10.1016/j.desal.2006.03.159

Cited by 13 publications

(11 citation statements)

References 6 publications

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“…“Stimuli‐responsive” polymers, also called “smart” polymers, exhibit relatively large and sharp physical or chemical changes in response to small physical or chemical stimuli 1–4. These polymers are being used as hydrogels5–7 or copolymers for technical applications in chemical and mechanical engineering systems such as mass separation, chemical valves, temperature or pH indicators, biomedical and drug delivery systems 8–9. For these applications, a rapid response and good mechanical properties are necessary.…”

Section: Introductionmentioning

confidence: 99%

Interpenetrating Thermo and pH Stimuli‐Responsive Polymer Networks of PAAc/PNIPAAm Grafted onto PP

Ruíz

Burillo

Bucio

2007

Macro Materials & Eng

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A new strategy was used to prepare an interpenetrating polymer network of two stimuli‐responsive polymers, a thermosensitive poly N‐isopropylacrylamide (PNIPAAm) and a pH sensitive poly(acrylic acid) (PAAc) grafted onto poly(propylene) (PP) films (PP‐g‐PAAc). Three consecutive steps were used: graft copolymerization of PAAc onto PP films by gamma radiation, crosslinking of PP‐g‐PAAc to form the first network, and synthesis of a second network of PNIPAAm in situ within the crosslinked PP‐g‐PAAc by chemical polymerization and crosslinking. The phase transition temperature (LCST), measured by swelling measurements and DSC, the pH critical point, obtained by swelling, and the SEM derived morphology of network samples are reported.magnified image

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Section: Introductionmentioning

confidence: 99%

Interpenetrating Thermo and pH Stimuli‐Responsive Polymer Networks of PAAc/PNIPAAm Grafted onto PP

Ruíz

Burillo

Bucio

2007

Macro Materials & Eng

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“…Radiation modification of PP samples may be carried out in such a way that it acquires functional groups where a drug must be immobilized [15,16]. Stimuli-responsive polymers are of particular interest due to their ability to undergo a well defined change in their properties [17]. Acrylic acid (AAc) is one of the most popular monomers that have been grafted onto different polymeric matrices and its polymer or copolymers with pH sensitive response and carboxylic groups from poly(acrylic acid) (PAAc) of pH sensitive response have a capability to undergo further chemical reaction to produce new functional groups [18].…”

Section: Introductionmentioning

confidence: 99%

Radiation-Grafting of Thermo- and pH-Sensitive Poly(N-Vinylcaprolactam-co-Acrylic Acid) onto Silicone Rubber and Polypropylene Films

et al. 2014

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This work focuses on the effect of gamma-ray radiation conditions on the stimuli-responsive of polypropylene (PP) films and silicone (SR) rubber substrates grafted with N-vinylcaprolactam (NVCL) and acrylic acid (AAc). PP films and SR rubber were weighed and placed into glass ampoules and exposed to 60 Co γ-source in the presence of air at room temperature, at dose rate around 12 kGy h -1 and dose between 5 and 70 kGy. Solutions of NVCL and AAc (1/1, v/v), 50 % monomer concentration (v/v) in toluene were added to the samples, the ampoules were degassed by repeated freeze-thaw cycles (5 times per 20 min) and sealed. The ampoules were heated at 60 or 70 °C at reaction time per 12 h. To extract the residual monomer and homopolymer formed during the grafting, the samples were soaked in ethanol for 24 h and then in distilled water, followed by drying under vacuum to constant weight. The values of grafting percentage achieved at a given irradiation dose were higher for SR than for PP. Samples where characterized by FTIR-ATR, DSC, swelling, LCST, and pH critical point.

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“…Radiation modification of PP samples may be carried out in such a way that it acquires functional groups where a drug must be immobilized [9,10]. Stimuli-responsive polymers are of particular interest due to their ability to undergo a well defined change in their properties [11]. Acrylic acid (AAc) is one of the most popular monomers that have been grafted onto different polymeric matrices and its polymer or copolymers with pH sensitive response and carboxylic groups from poly acrylic acid (PAAc) of pH sensitive response have a capability to undergo further chemical reaction to produce new functional groups [12].…”

Section: Introductionmentioning

confidence: 99%

Radiation-induced grafting of N-isopropylacrylamide and acrylic acid onto polypropylene films by two step method

Ramírez-Fuentes

Bucio

Burillo

2007

Nuclear Instruments and Methods in Physics Research Section B:

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Functionalized track-etched membranes as versatile tool to investigate stimuli-responsive polymers for “smart” nano- and microsystems

Cited by 13 publications

References 6 publications

Interpenetrating Thermo and pH Stimuli‐Responsive Polymer Networks of PAAc/PNIPAAm Grafted onto PP

Interpenetrating Thermo and pH Stimuli‐Responsive Polymer Networks of PAAc/PNIPAAm Grafted onto PP

Radiation-Grafting of Thermo- and pH-Sensitive Poly(N-Vinylcaprolactam-co-Acrylic Acid) onto Silicone Rubber and Polypropylene Films

Radiation-induced grafting of N-isopropylacrylamide and acrylic acid onto polypropylene films by two step method

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