Syndiotactic polypropylene as potential material for the preparation of porous membranes via thermally induced phase separation (TIPS) process

Yave, Wilfredo; Quijada, Raúl; Ulbricht, Mathias; Benavente, Rosario

doi:10.1016/j.polymer.2005.10.012

Cited by 50 publications

(23 citation statements)

References 38 publications

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“…According to Herculano et al 21 , Thermally Induced Phase Separation (TIPS) is a method to make microporous membrane [22][23][24] . This procedure is perhaps the most versatile and simplest membrane preparation technique.…”

Section: Resultsmentioning

confidence: 99%

Metronidazole release using natural rubber latex as matrix

Herculano¹,

Guimarães

Belmonte

et al. 2010

Mat. Res.

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Natural Rubber Latex (NRL) can be used successfully in controlled release drug delivery due to their excellent matrix forming properties. Recently, NRL has shown to stimulate angiogenesis, cellular adhesion and the formation of extracellular matrix, promoting the replacement and regeneration of tissue. A dermatological delivery system comprising a topically acceptable, inert support impregnated with a metronidazole (MET) solution was developed. MET 2-(2-methyl-5-nitro-1H-imidazol-1-yl) ethanol, has been widely used for the treatment of protozoa and anaerobic bacterial infections. MET is a nitroimidazole anti-infective medication used mainly in the treatment of infections caused by susceptible organisms, particularly anaerobic bacteria and protozoa. In a previous study, we have tested NRL as an occlusive membrane for GBR with promising results. One possible way to decrease the inflammatory process, it was incorporated the MET in NRL. MET was incorporated into the NRL, by mixing it in solution for in vitro protein delivery experiments. The solutions of latex and MET were polymerized at different temperatures, from -100 to 40 °C, in order to control the membrane morphology. SEM microscopy analysis showed that the number, size and distribution of pores in NRL membranes varied depending on polymerization temperature, as well as its overall morphology. Results demonstrated that the best drug-delivery system was the membrane polymerized at -100 °C, which does release 77,1% of its MET content for up 310 hours.

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Section: Resultsmentioning

confidence: 99%

Metronidazole release using natural rubber latex as matrix

Herculano¹,

Guimarães

Belmonte

et al. 2010

Mat. Res.

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“…1. These morphologies indicate that the membranes have cellular cross-sections [19]. As is known to us all, the membrane preparation by the TIPS process is from a Brought to you by | New York University Bobst Library Technical Services Authenticated Download Date | 6/15/15 1:53 PM biphasic polymer/diluents system, thus the final membrane consists of a polymeric matrix and pores filled with diluents.…”

Section: Effect Of Caco 3 Contentmentioning

confidence: 85%

Preparation and characterization of polyamide-6/CaCO3 hybrid hollow fiber membranes

Jiang¹,

Xiao²,

Hu³

2013

E-Polymers

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Polyamide-6(PA6)/CaCO 3 hollow fiber membranes were prepared by gel spinning from PA6/CaCO 3 /diluent system followed by cold-stretching. In virtue of the scanning electron microscopy (SEM), it is observed that the membrane present an asymmetric structure consisting of a dense skin, cellular cross-section and porous inner-surface. The porous structure was obtained by combining thermally induced phase separation (TIPS) process with interfacial micro-void mechanism, which has been seldom applied in membrane formation. Therefore, multi-porous structure derived from TIPS pores and interfacial micro-void. The Effects of CaCO 3 content, fixed-length heat-setting on properties of hollow fiber membranes such as water permeability, porosity, bubble point pore diameter were investigated. In three different CaCO 3 contents, the membrane with 30wt% CaCO 3 has the best comprehensive performance. In addition, fixed-length heat-setting was favorable to produce membrane with higher water permeability.

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“…The factorial models have been obtained from experimental design to study all interactions among the considered parameters 25 wt %), immersion 10 h), drying temperature (55-65°C) and in) [11,12,13,15,[20][21][22][23][24].…”

Section: Level Factorial Design (Ffd)mentioning

confidence: 99%

Optimization of the Preparation of Hydrophobic Isotactic Polypropylene Flat Sheet Membrane by Response Surface Methodology Design

Sunarti

Amira

2015

JSRR

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Membrane contactor (MC) is a cost effective solution that able to reduce the release carbon dioxide into the atmosphere.The membrane applies in a MC system are highly hydrophobic, high surface porosity, low mass transfer resistance and high resistance to chemicals in the feed streams.In this study, Response Surface Methodology (RSM) design consists of 2-Level Factorial and Centre Composite Design, which were performed for screening and optimization respectively, on the production of isotactic Polypropylene (iPP) microporous flat sheet. The results obtained from the analysis of variance of contact angle, showed that the impacts of drying temperature and drying time are much more important than polymer concentration and immersion time in methanol. The most optimum membranes prepared in this experiment were membranes with the contact angle value of 106.22° by the interacting factors of dry temperature and dry time, which are 54.96°C and 18.64 minutes respectively.The regression equation obtained from the 2-Level Factorial and

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Syndiotactic polypropylene as potential material for the preparation of porous membranes via thermally induced phase separation (TIPS) process

Cited by 50 publications

References 38 publications

Metronidazole release using natural rubber latex as matrix

Metronidazole release using natural rubber latex as matrix

Preparation and characterization of polyamide-6/CaCO3 hybrid hollow fiber membranes

Optimization of the Preparation of Hydrophobic Isotactic Polypropylene Flat Sheet Membrane by Response Surface Methodology Design

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