Thermoresponsive surfaces prepared using adsorption of a cationic graft copolymer: A versatile method for triggered particle capture

Liu, R.; Saunders, Brian R.

doi:10.1016/j.jcis.2009.05.073

Cited by 15 publications

(21 citation statements)

References 37 publications

(59 reference statements)

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“…The formation of second plateau, which has emerged in the range of the higher equilibrium CTAB concentrations (> 240 mg/l initial CTAB concentration) of CTAB, can be considered as a result of hydrophobic binding, after the surface saturation and the formation of hemi-micelle. Probably the predominant adsorption mechanism is the hydrophobic binding [30,31], in which the driving force is the increase in the entropy of the system. However, Fig.…”

Section: Eect Of Initial Ctab Concentrationmentioning

confidence: 99%

Synthesis of Super Hydrophobic Clay by Solution Intercalation Method from Aqueous Dispersions

Açıkyıldız¹,

Gürses²,

Yolcu³

2015

Acta Phys. Pol. A

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The super hydrophobic materials have inspired a great deal of interest and research in recent years because of their unique water-repellent, self-cleaning properties, and their potential for practical applications. This study aims to create a super hydrophobic clay surface from aqueous dispersions of a long-chain hydrocarbon, Cetyltrimethylammonium Bromide (CTAB), and layered silicate via the solution intercalation method. First, to increase diusing tendency of CTA + ions from aqueous medium to the interlayer region of clay, long-chain hydrocarbon agent was • , indicating its super hydrophobic character. XRD pattern and HRTEM images for the organo-clay conrm the intercalated structures.

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Section: Eect Of Initial Ctab Concentrationmentioning

confidence: 99%

Synthesis of Super Hydrophobic Clay by Solution Intercalation Method from Aqueous Dispersions

Açıkyıldız¹,

Gürses²,

Yolcu³

2015

Acta Phys. Pol. A

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“…to work optimally (45,46) Radiation grafting Free radical/ionic Generation of radicals/ions by gamma radiation (11,47) Direct radical/ion generation eliminates the need of initiators and washout steps (48) Serious degradation and/or decomposition of the polymer can occur (49)(50)(51) the molecule capable of triggering a reaction (34). The reaction that eventuates is the transfer of this high energy radical to a substrate polymer that can subsequently react with monomer composites to effect a modification on the polymer surface presenting a grafted product (32).…”

Section: Photo-initiated Graftingmentioning

confidence: 99%

“…The limitation of this method is in the actual process. Radicals are generated by electron abstraction; naturally radical generation is considerably unselective and is constrained along the path of the incident radiation beam; it follows that radical generation is desultory (11,49,51). In addition, radiation is very deleterious and its employment to certain polymers can result in serious degradation and decomposition of the polymer (11,49,51).…”

Section: Free Radical Grafting Via a Radiation Approachmentioning

confidence: 99%

“…Radicals are generated by electron abstraction; naturally radical generation is considerably unselective and is constrained along the path of the incident radiation beam; it follows that radical generation is desultory (11,49,51). In addition, radiation is very deleterious and its employment to certain polymers can result in serious degradation and decomposition of the polymer (11,49,51). However, despite having no selectivity, there are no synthetic steps to be performed but like previous methods of radical grafting there remains the hazard of homopolymers formation and isomerization (11).…”

Section: Free Radical Grafting Via a Radiation Approachmentioning

confidence: 99%

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A Review of Polymeric Refabrication Techniques to Modify Polymer Properties for Biomedical and Drug Delivery Applications

et al. 2013

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Abstract. Polymers are extensively used in the pharmaceutical and medical field because of their unique and phenomenal properties that they display. They are capable of demonstrating drug delivery properties that are smart and novel, such properties that are not achievable by employing the conventional excipients. Appropriately, polymeric refabrication remains at the forefront of process technology development in an endeavor to produce more useful pharmaceutical and medical products because of the multitudes of smart properties that can be attained through the alteration of polymers. Small alterations to a polymer by either addition, subtraction, self-reaction, or cross reaction with other entities have the capability of generating polymers with properties that are at the level to enable the creation of novel pharmaceutical and medical products. Properties such as stimuli-responsiveness, site targeting, and chronotherapeutics are no longer figures of imaginations but have become a reality through utilizing processes of polymer refabrication. This article has sought to review the different techniques that have been employed in polymeric refabrication to produce superior products in the pharmaceutical and medical disciplines. Techniques such as grafting, blending, interpenetrating polymers networks, and synthesis of polymer complexes will be viewed from a pharmaceutical and medical perspective along with their synthetic process required to attain these products. In addition to this, each process will be evaluated according to its salient features, impeding features, and the role they play in improving current medical devices and procedures.

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“…Some of these materials are particularly suitable for advanced technologies related to drug, genes and growth factors delivery, bone cements and adhesives, degradable and bioresponsive implants and coatings. [8][9][10][11][12][13][14][15][16] The main role of the materials is to support tissue regeneration, trigger, and/or inhibit particular biological or microbiological activity. It is well known that this can be achieved using chemical (Ca, P, Zn, Mg), structural (including topographical), or mechanical cues of the materials such as stiffness.…”

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confidence: 99%

Tailoring Cell Behavior on Polymers by the Incorporation of Titanium Doped Phosphate Glass Filler

et al. 2010

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Understanding tissue response to materials, to enable modulation and guided tissue regeneration is one of the main challenges in biomaterials science. Nowadays polymers, glasses, and metals dominate as biomaterials. Often native properties of those materials are not sufficient and there is a need to combine them, so as to modify and adjust their properties to the application. The primary aim of this study was to improve cell response to polymer (PLDL) using phosphate glass as filler (titanium doped phosphate glass). As a control β‐tricalcium phosphate (TCP) filler was used. Various concentrations of the filler were used (10–40 vol%). Wetting behavior, ζ‐potentials, mechanical and thermal properties, and human cells response to the materials were evaluated. Results showed that with increase in glass filler loading wettability improved, ζ‐potentials dropped, and increase in stiffness of materials was observed. Importantly cell culture experiments showed more developed and well spread cells on the samples with glass content up to 20 vol%. Cells responded much more positively to the glass filled samples than to TCP filled. However, expression of osteocalcin and osteopontin, proteins that indicate formation of the mineralized structures was positive for all the samples including pure PLDL. It was concluded that due to improved wetting behavior, lower ζ‐potentials, and specific chemistry of the glass filler it was possible to alter cells response, improve bioactivity of the polymer, and vary mechanical properties.

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Thermoresponsive surfaces prepared using adsorption of a cationic graft copolymer: A versatile method for triggered particle capture

Cited by 15 publications

References 37 publications

Synthesis of Super Hydrophobic Clay by Solution Intercalation Method from Aqueous Dispersions

Synthesis of Super Hydrophobic Clay by Solution Intercalation Method from Aqueous Dispersions

A Review of Polymeric Refabrication Techniques to Modify Polymer Properties for Biomedical and Drug Delivery Applications

Tailoring Cell Behavior on Polymers by the Incorporation of Titanium Doped Phosphate Glass Filler

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