scholarly journals Layer-by-Layer Polymer Coating on Discrete Particles of Cubic Lyotropic Liquid Crystalline Dispersions (Cubosomes)

Langmuir ◽  
2013 ◽  
Vol 29 (42) ◽  
pp. 12891-12900 ◽  
Author(s):  
Chantelle D. Driever ◽  
Xavier Mulet ◽  
Lynne J. Waddington ◽  
Almar Postma ◽  
Helmut Thissen ◽  
...  
Keyword(s):  
Polymer Coating ◽  
Liquid Crystalline ◽  
Layer By Layer

Printable photonic polymer coating based on a monodomain blue phase liquid crystal network

2019 ◽  
Vol 7 (44) ◽  
pp. 13764-13769 ◽  
Author(s):  
Jiajia Yang ◽  
Weidong Zhao ◽  
Zhou Yang ◽  
Wanli He ◽  
Jingxia Wang ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Polymer Coating ◽  
Liquid Crystalline ◽  
Crystal Network ◽  
Phase Liquid ◽  
Blue Phase

In this paper, a printable photonic polymer coating was fabricated from a monodomain liquid crystalline blue phase network.

scholarly journals Polymer Fibers Covered by Soft Multilayered Films for Sensing Applications in Composite Materials

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 4052 ◽  
Author(s):  
Dorian Nikoniuk ◽  
Karolina Bednarska ◽  
Maksymilian Sienkiewicz ◽  
Grzegorz Krzesiński ◽  
Mateusz Olszyna ◽  
...  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Optical Fibers ◽  
Temperature Sensitivity ◽  
Polymer Coating ◽  
Layer By Layer ◽  
Sensor Applications ◽  
Sensing Applications ◽  
Polymer Optical Fibers ◽  
Soft Polymer

This paper presents the possibility of applying a soft polymer coating by means of a layer-by-layer (LbL) technique to highly birefringent polymer optical fibers designed for laminating in composite materials. In contrast to optical fibers made of pure silica glass, polymer optical fibers are manufactured without a soft polymer coating. In typical sensor applications, the absence of a buffer coating is an advantage. However, highly birefringent polymer optical fibers laminated in a composite material are much more sensitive to temperature changes than polymer optical fibers in a free space as a result of the thermal expansion of the composite material. To prevent this, we have covered highly birefringent polymer optical fibers with a soft polymer coating of different thickness and measured the temperature sensitivity of each solution. The results obtained show that the undesired temperature sensitivity of the laminated optical fiber decreases as the thickness of the coating layer increases.

Layer-by-layer-coated lyotropic liquid crystalline nanoparticles for active tumor targeting of rapamycin

Nanomedicine ◽  
2016 ◽  
Vol 11 (22) ◽  
pp. 2975-2996 ◽  
Author(s):  
May S Freag ◽  
Yosra SR Elnaggar ◽  
Doaa A Abdelmonsif ◽  
Ossama Y Abdallah
Keyword(s):  
Tumor Targeting ◽  
Liquid Crystalline ◽  
Layer By Layer ◽  
Liquid Crystalline Nanoparticles

Formation of Calcium Phosphate-Ellagic Acid Composites by Layer by Layer Assembly for Cellular Attachment to Osteoblasts

2012 ◽  
Vol 13 ◽  
pp. 1-17
Author(s):  
Ipsita A. Banerjee ◽  
Karl R. Fath ◽  
Nako Nakatsuka ◽  
Nazmul H. Sarker ◽  
Ipsita A. Banerjee
Keyword(s):  
Calcium Phosphate ◽  
Ellagic Acid ◽  
Liquid Crystalline ◽  
Average Pore Size ◽  
Layer By Layer ◽  
Average Pore ◽  
Assembly Method ◽  
Cellular Attachment ◽  
New Strategy

The quest for new biomaterials to serve as cell scaffolds for applications in tissue engineering is of prime importance. In this work, we investigated microfiber assemblies of Ellagic Acid (EA), a plant polyphenol to serve as scaffolds for attachment and proliferation of osteoblasts. The advantage of Ellagic Acid self-assembling system is its intrinsic ability to order into multiple layers due to its capability to form liquid crystalline assemblies. We prepared ellagic acid-microfiber composites by the layer-by-layer (LBL) assembly method, where collagen (COL), poly-Arginine (poly-R), and calcium phosphate nanocrystals were coated on the surface of ellagic acid microfibers. The attachment of the various layers was confirmed by various spectroscopic and microscopic methods. The samples were found to be porous with an average pore size of 600 nm. The formed microconjugates were biodegradable and supported the growth of human fetal osteoblast (hFOB) cells in vitro. Our findings suggest that this system not only promotes initial cell adhesion but also can be utilized to deliver the vital biological molecule ellagic acid to cells at the scaffold interface and displays a new strategy for the design of biomaterials.

An all-solid-state reference electrode based on the layer-by-layer polymer coating

The Analyst ◽  
2007 ◽  
Vol 132 (9) ◽  
pp. 906 ◽  
Author(s):  
Nak-Hyun Kwon ◽  
Kyung-Sun Lee ◽  
Mi-Sook Won ◽  
Yoon-Bo Shim
Keyword(s):  
Solid State ◽  
Polymer Coating ◽  
Reference Electrode ◽  
Layer By Layer ◽  
State Reference

Converging layer-by-layer polyelectrolyte microcapsule and cubic lyotropic liquid crystalline nanoparticle approaches for molecular encapsulation

Soft Matter ◽  
2011 ◽  
Vol 7 (9) ◽  
pp. 4257 ◽  
Author(s):  
Chantelle D. Driever ◽  
Xavier Mulet ◽  
Angus P. R. Johnston ◽  
Lynne J. Waddington ◽  
Helmut Thissen ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Layer By Layer ◽  
Molecular Encapsulation ◽  
Polyelectrolyte Microcapsule

scholarly journals Encapsulation of Essential Oils within a Polymeric Liposomal Formulation for Enhancement of Antimicrobial Efficacy

2010 ◽  
Vol 5 (9) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Sandy F. van Vuuren ◽  
Lisa C. du Toit ◽  
Ashleigh Parry ◽  
Viness Pillay ◽  
Yahya E. Choonara
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oils ◽  
Polymer Coating ◽  
Chitosan Solution ◽  
Antimicrobial Efficacy ◽  
Polymeric Coating ◽  
Limiting Factor ◽  
Layer By Layer ◽  
Positive Effects ◽  
The Stability

Essential oils and their constituents are known to possess antimicrobial activity; however, their inherent volatility is a limiting factor. In order to exploit the antimicrobial efficacy of essential oils, encapsulation within polymeric liposomal systems was undertaken. The liposomes were subsequently polymer-coated in order to further enhance the stability of the formulations. Essential oils distilled from Artemisia Afra, Eucalyptus Globulus and Melaleuca alternifolia were encapsulated into diastearoyl phosphatidylcholine and diastearoyl phosphatidylethanolamine liposomes employing a reverse phase evaporation methodology. A polyelectrolyte coating was then applied via the layer-by-layer self-deposition technique. A batch of the liposomes was polymer-coated with a 0.15%w/v chitosan solution. Using the minimum inhibitory concentration assay, the liposome-encapsulated, unencapsulated and polymer-coated liposome-encapsulated essential oils were compared in order to observe whether the antimicrobial efficacy was improved with encapsulation and polymer coating. Fractional inhibitory concentrations (FICs) were calculated in order to determine the antimicrobial interactions amongst the lipoid components, polymer coating and essential oils (synergistic, additive, indifferent and antagonistic interactions). With the exception of A. afra, microbial growth was inhibited at lower concentrations for the encapsulated formulations in comparison with the non-encapsulated oils. Synergistic to additive interactions were noted for encapsulated E. globulus (ΣFIC values 0.25-0.45) and M. alternifolia (ΣFIC values 0.26-0.52) formulations. The addition of the polymer coating did not enhance antimicrobial activity, but owing to their positive effects on membrane stability, its presence is important as a means of extending the shelf life of these formulations. Additionally, the presence of the polymeric coating availed the essential oil at a slower rate. This investigation is a stepping stone towards the promotion of the antimicrobial use of essential oils. The added benefits are that essential oils not only provide effective antimicrobial efficacy, but also promote a “greener” consumerism. Within liposomes, they will enhance dermato-cosmetic properties and increase the marketing image of the final product.

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