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Polymers
Special Issues
Biopolymer-Based Micro/Nanoparticles: Fabrication, Characterization and Applications
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Biopolymer-Based Micro/Nanoparticles: Fabrication, Characterization and Applications

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

Deadline for manuscript submissions: closed (25 June 2023) | Viewed by 4707

Special Issue Editors

Dr. Bo Pang

E-Mail Website
Guest Editor
Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, Sweden
Interests: biopolymers; colloids; nanocellulose; emulsions; interface
Prof. Dr. Huan Liu

E-Mail Website
Guest Editor
Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
Interests: biomass; polysaccharides; self-assembly; nanocellulose
Prof. Dr. Chuanling Si

E-Mail Website
Guest Editor
Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, China
Interests: lignin; cellulose; biorefinery; sustainable materials

Special Issue Information

Dear Colleagues,

Various types of micro/nanoparticles have a variety of applications in several areas, ranging from food and environmental sectors to biomedical and energy-related fields. Compared to synthetic polymer-based micro/particles, micro/nanoparticles derived from naturally occurring biopolymers (e.g., cellulose, lignin, chitin, starch, alginate, proteins, etc.) possess considerable advantages, such as an abundant availability, excellent biocompatibility and biodegradability, etc. In recent decades, there has been an increasing interest in the exploration of novel approaches of contracting well-controlled biopolymer-based micro/nanoparticles, the development of advanced techniques to characterize their physicochemical properties, and efforts to expand their applications. In this context, we have been asked by the editor of Polymers (MDPI) to coordinate a Special Issue entitled “Biopolymer-based micro/nanoparticles: Fabrication, characterization and applications”.

This Special Issue is will mainly focus on the current status and research advances of these promising micro/nanoparticles. Original research papers, comprehensive reviews and perspectives, as well as letters and communications, are most welcome.

Dr. Bo Pang
Prof. Dr. Huan Liu
Prof. Dr. Chuanling Si
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

  • biopolymers
  • micro/nanoparticles
  • fabrication approaches
  • characterization techniques
  • applications

Published Papers (3 papers)

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Research

15 pages, 4597 KiB  
Article
A Novel UV Barrier Poly(lactic acid)/Poly(butylene succinate) Composite Biodegradable Film Enhanced by Cellulose Extracted from Coconut Shell
by Xiaoyan He, Lisheng Tang, Jun Zheng, Yuanyuan Jin, Ruobin Chang, Xiaoquan Yu, Yihu Song and Ran Huang
Polymers 2023, 15(14), 3000; https://doi.org/10.3390/polym15143000 - 10 Jul 2023
Cited by 1 | Viewed by 1322
Abstract
Cellulose was extracted from coconut shell powder (CSP) as a renewable biomass resource and utilized as a reinforcing material in poly(lactic acid)/poly(butylene succinate) (PLA/PBS) solvent casting films. The extraction process involved delignification and mercerization of CSP. Microscopic investigation of the extracted microfibers demonstrated [...] Read more.
Cellulose was extracted from coconut shell powder (CSP) as a renewable biomass resource and utilized as a reinforcing material in poly(lactic acid)/poly(butylene succinate) (PLA/PBS) solvent casting films. The extraction process involved delignification and mercerization of CSP. Microscopic investigation of the extracted microfibers demonstrated a reduction in diameter and a rougher surface characteristic compared to the raw CSP. The cellulose prepared in this study exhibited improved thermal stability and higher crystallinity (54.3%) compared to CSP. The morphology of the cycrofractured surface, thermal analysis, mechanical property, and UV transmittance of films were measured and compared. Agglomeration of 3 wt.% of cellulose was observed in PLA/PBS films. The presence of cellulose higher than 1 wt.% in the PLA/PBS decreased the onset decomposition temperature and maximum decomposition temperature of films. However, the films loading 3 wt.% of cellulose had a higher char formation (5.47%) compared to neat PLA/PBS films. The presence of cellulose promoted the formation of non-uniform crystals, while cellulose had a slightly negative impact on crystallinity due to the disruption of polymer chains at lower cellulose content (0.3, 0.5 wt.%). The mechanical strength of PLA/PBS films decreased as the cellulose content increased. Moreover, PLA/PBS film with 3 wt.% of cellulose appeared to show a 3% and 7.5% decrease in transmittance in UVC (275 nm) and UVA (335 nm) regions compared to neat PLA/PBS films while maintaining a certain transparency. Full article
(This article belongs to the Special Issue Biopolymer-Based Micro/Nanoparticles: Fabrication, Characterization and Applications)
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13 pages, 5682 KiB  
Article
Effect of Mortise and Tenon Structure on the Properties of Wood Flour Polyvinyl Chloride-Laminated Veneer Lumber Co-Extruded Composites
by Guanggong Zong, Jinjiang Zhou, Mengyan Zhang, Yanqiu Ma, Yang Zhao, Xiaoyan He, Jianxiu Hao and Fangfang Wang
Polymers 2023, 15(9), 2151; https://doi.org/10.3390/polym15092151 - 30 Apr 2023
Viewed by 1131
Abstract
Core–shell composites with strong weather resistance, mechanical strength and creep resistance can be prepared using co-extrusion technology. Considering the weak bonding strength between core–shell interfaces, this study started from the concept of a mortise and tenon combination; three types of conical, rectangular and [...] Read more.
Core–shell composites with strong weather resistance, mechanical strength and creep resistance can be prepared using co-extrusion technology. Considering the weak bonding strength between core–shell interfaces, this study started from the concept of a mortise and tenon combination; three types of conical, rectangular and trapezoidal mortise and tenon joints were prepared, and their bending properties, long-term creep properties, interfacial bonding properties, and dimensional stability properties were tested. Results showed that the mortise and tenon structure could form a mechanical interlock between the outer-shell-layer polyvinyl chloride (PVC) wood–plastic composite (WPVC) and the inner-core-layer laminated veneer lumber (LVL), which could effectively improve the interface bonding property between the two layers. Among them, the trapezoidal mortise and tenon structure had the largest interface bonding force compared with the tapered and rectangular mortise and tenon structure, where the interface bonding strength reached 1.01 MPa. Excellent interface bonding can effectively transfer and disperse stress, so the trapezoidal mortise and tenon structure had the best bending properties and creep resistance, with a bending strength of 59.54 MPa and a bending modulus of 5.56 GPa. In the long-term creep test, the deformation was also the smallest at about 0.2%, and its bending properties, creep resistance and interface bonding performance were also the best. The bending strength was 59.54 MPa and the bending modulus was 5.56 GPa; in the long-term creep test, the strain curve was the lowest, about 0.2%. In addition, the mortise and tenon structure could disperse the stress of the inner shell LVL after water absorption and expansion, thus significantly improving the dimensional stability of the co-extruded composite after water absorption. Full article
(This article belongs to the Special Issue Biopolymer-Based Micro/Nanoparticles: Fabrication, Characterization and Applications)
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18 pages, 5665 KiB  
Article
Fabrication of Polysaccharide-Based Halochromic Nanofibers via Needle-Less Electrospinning and Their Characterization: A Study of the Leaching Effect
by Beste Elveren, Silvo Hribernik and Manja Kurečič
Polymers 2022, 14(19), 4239; https://doi.org/10.3390/polym14194239 - 10 Oct 2022
Cited by 6 | Viewed by 1861
Abstract
Responsive materials, i.e., smart materials, have the ability to change their physical or chemical properties upon certain external signals. The development of nanofibrous halochromic materials, specifically combining the pH-sensitive functionality and unique nanofiber properties, could yield interesting new applications, especially when the common [...] Read more.
Responsive materials, i.e., smart materials, have the ability to change their physical or chemical properties upon certain external signals. The development of nanofibrous halochromic materials, specifically combining the pH-sensitive functionality and unique nanofiber properties, could yield interesting new applications, especially when the common problem of dye leaching is successfully tackled. Therefore, in this article, we studied the fabrication process of polysaccharide-based halochromic nanofibrous materials by using a combination of various halochromic dyes (bromothymol blue, bromocresol green, and thymol blue) and cellulose acetate in a spinning solution using a one-pot strategy. The inhibition of leaching was addressed by using a complexing agent: poly-diallyl-dimethylammonium chloride (PDADMAC). The preparation of hybrid spinning solutions, their characterization, and ability to form continuous nanofibers were studied using a high production needle-less electrospinning system. The produced hybrid solutions and nanofibers were characterized, in terms of their rheological properties, chemical structure, morphology, and functionality. Fabricated nanofibrous halochromic structures show a clear color change upon exposure to different pH values, as well as the reduced leaching of dyes, upon the addition of a complexing agent. The leaching decreased by 61% in the case of bromocresol green, while, in the case of bromothymol blue and thymol blue, the leaching was reduced by 95 and 99%, respectively. Full article
(This article belongs to the Special Issue Biopolymer-Based Micro/Nanoparticles: Fabrication, Characterization and Applications)
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