Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
6.6
5.0
Journals
Polymers
Special Issues
Polymer Interface and Its Characterization
share announcement

Polymer Interface and Its Characterization

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Physics and Theory".

Deadline for manuscript submissions: closed (20 August 2021) | Viewed by 7941

Special Issue Editors

Prof. Dr. Zaixing Jiang

E-Mail
Guest Editor
School of Chemistry and Chemical Engineering, Harbin Institute of Technology, No. 92 West Dazhi St., Nangang Dist, Harbin 150001, China
Interests: polymer interface; fast AFM; biophysics; polymer composite; nanoscience
Special Issues, Collections and Topics in MDPI journals
Dr. Shuai Zhang

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, University of Washington, Washington, DC, USA
Interests: in situ high-resolution and high-speed atomic force microscopy (AFM); 3D Fast Force Mapping (3DFFM)
Special Issues, Collections and Topics in MDPI journals
Dr. Dawei Zhang

E-Mail Website
Guest Editor
Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China
Interests: chitosan hydrogel; chitosan nanofiber; rapidly UV-curable resin; wound healing; soft sensors
Special Issues, Collections and Topics in MDPI journals
Dr. Guo-Lin Gao

E-Mail
Guest Editor
School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, China
Interests: polymer synthesis; composite interface

Special Issue Information

Dear Colleagues,

As one of the core problems in the field of materials, polymer interface accompanies the development of polymer materials. The understanding of the mechanism of polymer performance improvement is increasingly dependent on the understanding of interface problems. More and more theories and methods have been created and used to solve polymer interface problems. However, the core problem of interface characterization has been always restricting the solution of interface problems. New high-precision, on line, and in situ characterization techniques and methods of polymer interface are becoming more and more needed.  The scope of polymers include synthetic polymers, natural polymers, biopolymers, and so on. For example, protein, DNA, polysaccharides, bacterial walls, cell membranes, etc., are all included.

The aim of this Special Issue is the deep understanding of the polymer interface mechanisms through applications of various characterization methods, and construct the relationship between interfacial structure and polymer properties.

Prof. Zaixing Jiang
Asst. Prof. Shuai Zhang
Assoc. Prof. Dawei Zhang
Assoc. Prof. Guo-Lin Gao
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

  • Polymer surface and interface
  • Biopolymer surface and interface
  • Natural polymer surface and interface
  • Polymer based composite surface and interface
  • Polymer-based nanocomposite surface and interface
  • AFM technology
  • TEM technology

Published Papers (3 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

12 pages, 3697 KiB  
Article
Measuring the Complex Permittivities of Plastics in Irregular Shapes
by Hsien-Wen Chao, Hua-Hsuan Chen and Tsun-Hsu Chang
Polymers 2021, 13(16), 2658; https://doi.org/10.3390/polym13162658 - 10 Aug 2021
Cited by 5 | Viewed by 2215
Abstract
This work presents the measurement of the complex permittivities of high density polyethylene (HDPE), linear low density polyethylene (LLDPE), low density polyethylene (LDPE), polypropylene (PP), Nylon, and thermoplastic vulcanizates (TPV) in irregular shapes at the microwave frequency. A Teflon sample holder was employed [...] Read more.
This work presents the measurement of the complex permittivities of high density polyethylene (HDPE), linear low density polyethylene (LLDPE), low density polyethylene (LDPE), polypropylene (PP), Nylon, and thermoplastic vulcanizates (TPV) in irregular shapes at the microwave frequency. A Teflon sample holder was employed to pack irregularly shaped plastic materials with various volumetric percentages. The samples were put into a resonant cavity with an enhanced electric field in its center, which is known as the enhanced-field method (EFM). The resonant frequencies and the quality factors at different volumetric percentages were measured by a network analyzer and compared with simulated results using a full-wave simulator (high-frequency structure simulator (HFSS)). Three simulation models, layer, ring, and hybrid, are proposed and compared with the experimental results. It is found that the hybrid model (denoted as Z5R5) with five heights and five radii in the partition is the most suitable. The complex permittivities of six plastic materials were evaluated by the contour maps of the HFSS simulation using the hybrid model. The measured complex permittivities of the irregularly shaped polymers agree well with their counterparts in bulk form. Full article
(This article belongs to the Special Issue Polymer Interface and Its Characterization)
►▼ Show Figures

Figure 1

15 pages, 34458 KiB  
Article
Effects of Repulsion Parameter and Chain Length of Homopolymers on Interfacial Properties of An/Ax/2BxAx/2/Bm Blends: A DPD Simulation Study
by Dongmei Liu, Kai Gong, Ye Lin, Huifeng Bo, Tao Liu and Xiaozheng Duan
Polymers 2021, 13(14), 2333; https://doi.org/10.3390/polym13142333 - 16 Jul 2021
Cited by 7 | Viewed by 2069
Abstract
We explored the effects of the repulsion parameter (aAB) and chain length (NHA or NHB) of homopolymers on the interfacial properties of An/Ax/2BxAx/2/Bm ternary polymeric blends [...] Read more.
We explored the effects of the repulsion parameter (aAB) and chain length (NHA or NHB) of homopolymers on the interfacial properties of An/Ax/2BxAx/2/Bm ternary polymeric blends using dissipative particle dynamics (DPD) simulations. Our simulations show that: (i) The ternary blends exhibit the significant segregation at the repulsion parameter (aAB = 40). (ii) Both the interfacial tension and the density of triblock copolymer at the center of the interface increase to a plateau with increasing the homopolymer chain length, which indicates that the triblock copolymers with shorter chain length exhibit better performance as the compatibilizers for stabilizing the blends. (iii) For the case of NHA = 4 (chain length of homopolymers An) and NHB (chain length of homopolymers Bm) ranging from 16 to 64, the blends exhibit larger interfacial widths with a weakened correlation between bead An and Bm of homopolymers, which indicates that the triblock copolymer compatibilizers (Ax/2BxAx/2) show better performance in reducing the interfacial tension. The effectiveness of triblock copolymer compatibilizers is, thus, controlled by the regulation of repulsion parameters and the homopolymer chain length. This work raises important considerations concerning the use of the triblock copolymer as compatibilizers in the immiscible homopolymer blend systems. Full article
(This article belongs to the Special Issue Polymer Interface and Its Characterization)
►▼ Show Figures

Graphical abstract

14 pages, 5481 KiB  
Article
Preparation of Chitosan/Magnetic Porous Biochar as Support for Cellulase Immobilization by Using Glutaraldehyde
by Haodao Mo and Jianhui Qiu
Polymers 2020, 12(11), 2672; https://doi.org/10.3390/polym12112672 - 12 Nov 2020
Cited by 36 | Viewed by 2900
Abstract
In this work, porous biochar was obtained from sugarcane bagasse by alkali activation and pyrolysis and then magnetized with γ-Fe2O3 by calcination. After functionalization with chitosan and activation with glutaraldehyde, the as-prepared chitosan/magnetic porous biochar served as a support to [...] Read more.
In this work, porous biochar was obtained from sugarcane bagasse by alkali activation and pyrolysis and then magnetized with γ-Fe2O3 by calcination. After functionalization with chitosan and activation with glutaraldehyde, the as-prepared chitosan/magnetic porous biochar served as a support to immobilize cellulase by covalent bonds. The immobilization amount of cellulase was 80.5 mg cellulase/g support at pH 5 and 25 °C for 12 h of immobilization. To determine the enzymatic properties, 1% carboxymethyl cellulose sodium (CMC) (dissolved in 0.1 M buffer) was considered as a substrate for hydrolysis at different pH values (3–7) and temperatures (30–70 °C) for 30 min. The results showed that the optimum pH and temperature of the free and immobilized cellulase did not change, which were pH 4 and 60 °C, respectively. The immobilized cellulase had a relatively high activity recovery of 73.0%. However, it also exhibited a higher Michaelis–Menten constant (Km) value and a slower maximum reaction velocity (Vmax) value compared to the free enzyme. In the reusability assay, the immobilized cellulase showed initial glucose productivity of 330.9 mg glucose/g CMC and remained at 86.0% after 10 uses. In conclusion, the chitosan/magnetic porous biochar has great potential applications as a support for enzyme immobilization. Full article
(This article belongs to the Special Issue Polymer Interface and Its Characterization)
►▼ Show Figures

Graphical abstract

Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-3
Back to TopTop