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Polymers
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Selected Papers from 2018 SRPS & 2018 GISAS: Structure-Mediated Functional...
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Selected Papers from 2018 SRPS & 2018 GISAS: Structure-Mediated Functional Polymers

A special issue of Polymers (ISSN 2073-4360).

Deadline for manuscript submissions: closed (31 December 2018) | Viewed by 28899

Special Issue Editors

Prof. Moonhor Ree

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Guest Editor
Department of Chemistry, Division of Advanced Materials Science, and Polymer Research Institute
Pohang University of Science and Technology, 77 Cheongam-ro (Hyoja-dong), Nam-gu, Pohang 37673, Korea
Interests: synthesis of functional and high performance polymers; structure, morphology, and surface/interface of polymers; properties of polymers; smart brush polymers and their nanostructures and applications; 3D structures of proteins and DNAs/RNAs; polymer and bioorganism interfaces and hybrid systems; synchrotron radiation science and its applications in polymers
Special Issues, Collections and Topics in MDPI journals
Prof. Hyun Hoon Song

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Guest Editor
Department of Advanced Materials, Hannam University, 461-6 Jeonmin-dong, Yuseong-gu, Daejeon 305-811, Korea
Interests: self-assembling and nanostructures of supramolecules; morphology formations in fibers and thin films; crystallizations and crystalline structures of polymers; morphologies of anmorphous polymers; stress-induced crystallizations of rubbery polymers; polymeric blends and nanoparticles
Prof. Dr. Soo-Young Park

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Guest Editor
Department of Polymer Science and Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
Interests: liquid crystal photonic sensor; polymer nanocomposite; structural analysis using SAXS/SANS/WAXS
Dr. Kwang-woo Kim

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Guest Editor
Pohang Accelerator Laboratory, POSTECH, Pohang 37673, Korea
Interests: synchrotron radiation application research; X-ray scattering optics
Prof. Tae Joo Shin

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Guest Editor
Synchrotron Radiation Application Researches Lab, UNIST Central Research Facilities and School of Natural Science, UNIST, 50 UNIST-gil, Ulsan 44919, Korea
Interests: synchrotron radiation application research; structures and morphologies of polymers and their composites; advanced hydrid materials

Special Issue Information

Dear Colleagues,

The Synchrotron Radiation in Polymer Science (SRPS) and Grazing incidence small angle scattering (GISAS) conferences have become major events in the polymer science community, as well as in the advanced materials science community, since being held in 1995 and 2009, respectively.

The 2018 SRPS conference (http://www.2018SRPS-GISAS.org/srps2018/) is covering recent advances in the application of synchrotron radiation in all polymer science and advanced material areas: X-ray scattering, diffraction and reflectivity; resonant soft X-ray scattering; micro and nanofocus scattering and diffraction; infrared spectroscopy, absorption fine structure spectroscopy, and microscopy; neutron scattering and reflectivity; XFEL sciences (fast dynamics, coherent scattering and imaging, crystallography, etc.); modeling, simulation, data analysis and new methods; etc.

On the other hand, the 2018 GISAS conference (http://www.2018SRPS-GISAS.org/gisas2018/) covers recent advances in GISAS theories and methods, as well as key issues of structures and their correlations to materials properties and device performances in advanced materials science and technology, nano-science and technology, energy science and technology, bio-science and technology, micro-, nano- and molecular electronics, metallic and magnetic materials, and instrumentations/data analysis/new methods.

Prof. Moonhor Ree
Prof. Hyun Hoon Song
Prof. Soo-Young Park
Dr. Kwang-woo Kim
Prof. Tae Joo Shin
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Structure-mediated polymers in bulk or thin films or solutions
  • Polymer nanoparticles
  • Polymer micelles
  • Polymer gels
  • Health Polymers
  • Shape-memory polymers
  • Energy polymers
  • Microelectronic and optoelectronic polymers
  • Topological polymers
  • Polymer-nonpolymer hydrid systems
  • 3D structures of natural and synthetic polymers in solution
  • Polymer structure and property characterizations
  • New photon and neutron source applications in polymers and materials

Published Papers (7 papers)

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Research

9 pages, 2217 KiB  
Article
Dispersion of Boron Nitride Nanotubes by Pluronic Triblock Copolymer in Aqueous Solution
by Sang-Woo Jeon, Shin-Hyun Kang, Jung Chul Choi and Tae-Hwan Kim
Polymers 2019, 11(4), 582; https://doi.org/10.3390/polym11040582 - 01 Apr 2019
Cited by 7 | Viewed by 4250
Abstract
Boron nitride nanotubes (BNNTs) have been of interest for their excellent thermal, electrical, and mechanical properties, and they have a broad spectrum of potential applications, such as in piezoelectric materials, reinforcement of materials, and electrothermal insulation materials. For practical use of BNNTs, it [...] Read more.
Boron nitride nanotubes (BNNTs) have been of interest for their excellent thermal, electrical, and mechanical properties, and they have a broad spectrum of potential applications, such as in piezoelectric materials, reinforcement of materials, and electrothermal insulation materials. For practical use of BNNTs, it is desirable to disperse them in aqueous solution, which improves convenience of handling. However, it is still difficult to make a homogenous and stable BNNT dispersion in aqueous solution, due to their strong van der Waals interactions and hydrophobic surface. To solve these problems, we used Pluronic P85 and F127, which have both hydrophilic groups and hydrophobic groups. Here, we report the wrapped structure of a Pluronic polymer-BNNT dispersion by using small-angle neutron scattering, UV–Vis spectroscopy, thermogravimetric analysis, and atomic force microscopy. Full article
(This article belongs to the Special Issue Selected Papers from 2018 SRPS & 2018 GISAS: Structure-Mediated Functional Polymers)
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16 pages, 3080 KiB  
Article
Effect of Ionic Group on the Complex Coacervate Core Micelle Structure
by Tae-Young Heo, Inhye Kim, Liwen Chen, Eunji Lee, Sangwoo Lee and Soo-Hyung Choi
Polymers 2019, 11(3), 455; https://doi.org/10.3390/polym11030455 - 10 Mar 2019
Cited by 19 | Viewed by 4306
Abstract
Pairs of ionic group dependence of the structure of a complex coacervate core micelle (C3M) in an aqueous solution was investigated using DLS, cryo-TEM, and SANS with a contrast matching technique and a detailed model analysis. Block copolyelectrolytes were prepared by introducing an [...] Read more.
Pairs of ionic group dependence of the structure of a complex coacervate core micelle (C3M) in an aqueous solution was investigated using DLS, cryo-TEM, and SANS with a contrast matching technique and a detailed model analysis. Block copolyelectrolytes were prepared by introducing an ionic group (i.e., ammonium, guanidinium, carboxylate, and sulfonate) to poly(ethylene oxide-b-allyl glycidyl ether) (NPEO = 227 and NPAGE = 52), and C3Ms were formed by simple mixing of two oppositely-charged block copolyelectrolyte solutions with the exactly same degree of polymerization. All four C3Ms are spherical with narrow distribution of micelle dimension, and the cores are significantly swollen by water, resulting in relatively low brush density of PEO chains on the core surface. With the pair of strong polyelectrolytes, core radius and aggregation number increases, which reflects that the formation of complex coacervates are significantly sensitive to the pairs of ionic groups rather than simple charge pairing. Full article
(This article belongs to the Special Issue Selected Papers from 2018 SRPS & 2018 GISAS: Structure-Mediated Functional Polymers)
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12 pages, 7760 KiB  
Article
Time Resolved Polarised Grazing Incidence Neutron Scattering from Composite Materials
by Maximilian Wolff, Apurve Saini, David Simonne, Franz Adlmann and Andrew Nelson
Polymers 2019, 11(3), 445; https://doi.org/10.3390/polym11030445 - 07 Mar 2019
Cited by 5 | Viewed by 3984
Abstract
Neutron scattering experiments are a unique tool in material science due to their sensitivity to light elements and magnetic induction. However, for kinetic studies the low brilliance at existing sources poses challenges. In the case of periodic excitations these challenges can be overcome [...] Read more.
Neutron scattering experiments are a unique tool in material science due to their sensitivity to light elements and magnetic induction. However, for kinetic studies the low brilliance at existing sources poses challenges. In the case of periodic excitations these challenges can be overcome by binning the scattering signal according to the excitation state of the sample. To advance into this direction we have performed polarised and time resolved grazing incidence neutron scattering measurements on an aqueous solution of the polymer F127 mixed with magnetic nano-particles. Magnetic nano-composites like this provide magnetically tuneable properties of the polymer crystal as well as magnetic meta-crystals. Even though the grazing incidence small angle scattering and polarised signals are too weak to be evaluated at this stage we demonstrate that such experiments are feasible. Moreover, we show that the intensity of the 111 Bragg peak of the fcc micellar crystal depends on the actual shear rate, with the signal being maximised when the shear rate is lowest (and vice-versa). Full article
(This article belongs to the Special Issue Selected Papers from 2018 SRPS & 2018 GISAS: Structure-Mediated Functional Polymers)
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8 pages, 1820 KiB  
Article
Effect of Hydration in Corona Layer on Structural Change of Thermo-Responsive Polymer Micelles
by Yusuke Akino, Kosuke Morimoto, Kengo Tsuboi, Satoshi Kanazawa and Isamu Akiba
Polymers 2019, 11(2), 382; https://doi.org/10.3390/polym11020382 - 22 Feb 2019
Cited by 3 | Viewed by 3083
Abstract
The effect of hydration in corona layer on temperature responsiveness of polymer micelles consisting of poly(N-vinyl pyrrolidone)-block-poly(n-octadecyl acrylate) (PVP-b-PODA) was investigated. Small-angle X-ray scattering and dynamic light scattering showed two-step shape change of PVP-b [...] Read more.
The effect of hydration in corona layer on temperature responsiveness of polymer micelles consisting of poly(N-vinyl pyrrolidone)-block-poly(n-octadecyl acrylate) (PVP-b-PODA) was investigated. Small-angle X-ray scattering and dynamic light scattering showed two-step shape change of PVP-b-PODA micelles around 45 and 65 °C with elevating temperature, although only one-step shape change was observed at 45 °C in cooling process. In the first step, shape of PVP-b-PODA micelles was changed from disk to ellipsoidal oblate at the melting temperature (Tm) of PODA, although similar micelles consisting of another amphiphilic block copolymers containing PODA simply changed from disk to sphere at the Tm with elevating temperature. PVP-b-PODA micelles changed to spherical shape above 65 °C. Two-dimensional (2D) 1H-NMR showed the PVP chains were perfectly dehydrated above 65 °C. Therefore, it was suggested that the appearance of ellipsoidal shape between Tm of PODA and 65 °C was caused owing to shape memory effect of pseudo network of corona layer due to robust hydration of PVP chains. Full article
(This article belongs to the Special Issue Selected Papers from 2018 SRPS & 2018 GISAS: Structure-Mediated Functional Polymers)
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14 pages, 4832 KiB  
Article
Synergistic Effect of Fullerenes on the Laser-Induced Periodic Surface Structuring of Poly(3-Hexyl Thiophene)
by Álvaro Rodríguez-Rodríguez, Edgar Gutiérrez-Fernández, Mari-Cruz García-Gutiérrez, Aurora Nogales, Tiberio A. Ezquerra and Esther Rebollar
Polymers 2019, 11(2), 190; https://doi.org/10.3390/polym11020190 - 22 Jan 2019
Cited by 5 | Viewed by 3135
Abstract
Ordered and homogeneous laser-induced periodic surface structures (LIPSS) could be fabricated in poly(3-hexyl thiophene):[6,6]-phenyl C71-butyric acid methyl ester (P3HT:PC71BM) blends by using wavelengths in the ultraviolet (UV) range (266 nm). The absorption coefficient of PC71BM, which is maximum in [...] Read more.
Ordered and homogeneous laser-induced periodic surface structures (LIPSS) could be fabricated in poly(3-hexyl thiophene):[6,6]-phenyl C71-butyric acid methyl ester (P3HT:PC71BM) blends by using wavelengths in the ultraviolet (UV) range (266 nm). The absorption coefficient of PC71BM, which is maximum in its UV–Visible absorption spectrum around 266 nm, enhanced the overall absorption of the blend. In addition, PC71BM itself was capable of developing homogeneous LIPSS by laser irradiation at λlaser = 266 nm. Therefore, we proposed that the synergistic effect of PC71BM on the LIPSS formation in P3HT:PC71BM (1:1) was due to a templating effect for the LIPSS formation of the PC71BM itself, which added to the overall increment of the absorption of the blend. LIPSS formation at ambient conditions in this wavelength range led to chemical modification of both P3HT and PC71BM, which rendered to non-conducting samples. Irradiation in vacuum significantly reduced radiation damage, rendering to the characteristic electrical conductivity pattern observed in P3HT LIPSS samples irradiated in the visible range. This effect could be of potential interest in order to obtain LIPSS in low absorbing polymers. Full article
(This article belongs to the Special Issue Selected Papers from 2018 SRPS & 2018 GISAS: Structure-Mediated Functional Polymers)
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11 pages, 2685 KiB  
Article
Self-Assembly of Temperature Sensitive Unilamellar Vesicles by a Blend of Block Copolymers in Aqueous Solution
by Jong Dae Jang, Changwoo Do, Joona Bang, Young Soo Han and Tae-Hwan Kim
Polymers 2019, 11(1), 63; https://doi.org/10.3390/polym11010063 - 04 Jan 2019
Cited by 9 | Viewed by 4314
Abstract
A self-assembled unilamellar vesicle, which can be used as a drug delivery system, was easily and simply fabricated using a blended system of Pluronic block copolymers. Controlling the hydrophilic mass fraction of block copolymers (by blending the block copolymer with a different hydrophilic [...] Read more.
A self-assembled unilamellar vesicle, which can be used as a drug delivery system, was easily and simply fabricated using a blended system of Pluronic block copolymers. Controlling the hydrophilic mass fraction of block copolymers (by blending the block copolymer with a different hydrophilic mass fraction) and temperature (i.e., the hydrophobic interaction is controlled), a vesicular structure was formed. Small angle neutron scattering measurements showed that the vesicular structure had diameters of empty cores from 13.6 nm to 79.6 nm, and thicknesses of the bilayers from 2.2 nm to 8.7 nm when the hydrophobic interaction was changed. Therefore, considering that the temperature of the vesicle formation is controllable by the concentration of the blended block copolymers, it is possible for them to be applied in a wide range of potential applications, for example, as nanoreactors and nanovehicles. Full article
(This article belongs to the Special Issue Selected Papers from 2018 SRPS & 2018 GISAS: Structure-Mediated Functional Polymers)
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14 pages, 6902 KiB  
Article
Machine-Washable Smart Textiles with Photothermal and Antibacterial Activities from Nanocomposite Fibers of Conjugated Polymer Nanoparticles and Polyacrylonitrile
by Dabin Lee, Jeong Seon Sang, Pil J. Yoo, Tae Joo Shin, Kyung Wha Oh and Juhyun Park
Polymers 2019, 11(1), 16; https://doi.org/10.3390/polym11010016 - 22 Dec 2018
Cited by 16 | Viewed by 5242
Abstract
Smart textiles based on conjugated polymers have been highlighted as promising fabrics that can intelligently respond to environmental stimuli based on the electrical properties of polymer semiconductors. However, there has been limited interest in the photothermal properties of conjugated polymers that can be [...] Read more.
Smart textiles based on conjugated polymers have been highlighted as promising fabrics that can intelligently respond to environmental stimuli based on the electrical properties of polymer semiconductors. However, there has been limited interest in the photothermal properties of conjugated polymers that can be applied to smart textiles. We prepared nanoparticles by assembling a conjugated polymer with a fatty acid via an emulsion process and nanocomposite fibers by distributing the conjugated polymer nanoparticles in a polyacrylonitrile matrix. We then fabricated the textiles using the fibers. The resulting fabrics based on nanocomposite fibers show a temperature increase to 50 °C in 10 min under white light irradiation because of efficient photothermal conversion by the conjugated polymer light harvester, while the temperature of a pristine polyacrylonitrile fabric increases to only 35 °C. In addition, excellent antimicrobial activity was confirmed by a 99.9% decrease in the populations of Staphylococcus aureus and Escherichia coli over 24 h because of the effect of the fatty acid in the nanocomposite films and fabrics. Furthermore, the fabric showed efficient durability after a laundry test, suggesting the usefulness of these smart textiles based on conjugated polymer nanoparticles for practical applications. Full article
(This article belongs to the Special Issue Selected Papers from 2018 SRPS & 2018 GISAS: Structure-Mediated Functional Polymers)
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