A nacre-mimetic superstructure of poly(butylene succinate) structured by using an intense shear flow and ramie fiber as a promising strategy for simultaneous reinforcement and toughening

2017 ◽  
Vol 5 (43) ◽  
pp. 22697-22707 ◽  
Author(s):  
Xu-Long Xie ◽  
Qiang-Sheng Sun ◽  
Jun Lei ◽  
Feng Tian ◽  
Ling Xu ◽  
...  
Keyword(s):  
Shear Flow ◽  
Polymeric Materials ◽  
Ramie Fiber ◽  
Butylene Succinate ◽  
Promising Strategy ◽  
Intense Shear ◽  
Reinforcement And Toughening ◽  
Strength And Toughness

Structuring nacre-mimetic superstructures in polymeric materials is an ideal way to enhance simultaneously their strength and toughness.

scholarly journals Influence of Diameter on the Templated Crystallization of Polyethylene/Carbon Material Fiber Composites under Intense Shear Flow

ACS Omega ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 1060-1067 ◽  
Author(s):  
Xiaochao Xia ◽  
Xi Zhang ◽  
Dandan Xie ◽  
Yanhao Huang ◽  
Youbing Li ◽  
...  
Keyword(s):  
Shear Flow ◽  
Carbon Material ◽  
Fiber Composites ◽  
Intense Shear

scholarly journals Biofilm Formation Reduction by Eugenol and Thymol on Biodegradable Food Packaging Material

Foods ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 2
Author(s):  
Pavel Pleva ◽  
Lucie Bartošová ◽  
Daniela Máčalová ◽  
Ludmila Zálešáková ◽  
Jana Sedlaříková ◽  
...  
Keyword(s):  
Food Quality ◽  
Polymer Films ◽  
Biofilm Formation ◽  
Food Packaging ◽  
Polymeric Materials ◽  
Poly Lactic Acid ◽  
Bacterial Strains ◽  
Butylene Succinate ◽  
Active Food Packaging ◽  
Materials Used

Biofilm is a structured community of microorganisms adhering to surfaces of various polymeric materials used in food packaging. Microbes in the biofilm may affect food quality. However, the presence of biofilm can ensure biodegradation of discarded packaging. This work aims to evaluate a biofilm formation on the selected biodegradable polymer films: poly (lactic acid) (PLA), poly (butylene adipate-co-terephthalate) (PBAT), and poly (butylene succinate) (PBS) by selected bacterial strains; collection strains of Escherichiacoli, Staphylococcusaureus; and Bacillus pumilus, Bacillussubtilis, Bacillustequilensis, and Stenotrophomonasmaltophilia isolated from dairy products. Three different methods for biofilm evaluation were performed: the Christensen method, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, and fluorescence microscopy. High biofilm formation was confirmed on the control PBS film, whereas low biofilm formation ability was observed on the PLA polymer sample. Furthermore, the films with incorporated antimicrobial compounds (thymol or eugenol) were also prepared. Antimicrobial activity and also reduction in biofilm formation on enriched polymer films were determined. Therefore, they were all proved to be antimicrobial and effective in reducing biofilm formation. These films can be used to prepare novel active food packaging for the dairy industry to prevent biofilm formation and enhance food quality and safety in the future.

scholarly journals Synthesis of Hydrophilic Poly(butylene succinate-butylene dilinoleate) (PBS-DLS) Copolymers Containing Poly(ethylene glycol) (PEG) of Variable Molecular Weights

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3177
Author(s):  
Moein Zarei ◽  
Miroslawa El Fray
Keyword(s):  
Molecular Weight ◽  
Thermal Properties ◽  
Ethylene Glycol ◽  
Polymeric Materials ◽  
Glycol Succinate ◽  
Resonance Spectroscopy ◽  
Scanning Calorimetry ◽  
Water Contact ◽  
Butylene Succinate ◽  
Molecular Weights

Polymeric materials have numerous applications from the industrial to medical fields because of their vast controllable properties. In this study, we aimed to synthesize series of poly(butylene succinate-dilinoleic succinate-ethylene glycol succinate) (PBS-DLS-PEG) copolymers, by two-step polycondensation using a heterogeneous catalyst and a two-step process. PEG of different molecular weights, namely, 1000 g/mol and 6000 g/mol, was used in order to study its effect on the surface and thermal properties. The amount of the PBS hard segment in all copolymers was fixed at 70 wt%, while different ratios between the soft segments (DLS and PEG) were applied. The chemical structure of PBS-DLS-PEG was evaluated using Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. Gel permeation chromatography was used to determine the molecular weight and dispersity index. The results of structural analysis indicate the incorporation of PEG in the macrochain. The physical and thermal properties of the newly synthesized copolymers were also evaluated using water contact angle measurements, differential scanning calorimetry and dynamic thermomechanical analysis. It was found that increasing the amount of PEG of a higher molecular weight increased the surface wettability of the new materials while maintaining their thermal properties. Importantly, the two-step melt polycondensation allowed a direct fabrication of a polymeric filament with a well-controlled diameter directly from the reactor. The obtained results clearly show that the use of two-step polycondensation in the melt allows obtaining novel PBS-DLS-PEG copolymers and creates new opportunities for the controlled processing of these hydrophilic and thermally stable copolymers for 3D printing technology, which is increasingly used in medical techniques.

Largely enhanced mechanical performance of poly(butylene succinate) multiple system via shear stress-induced orientation of the hierarchical structure

2018 ◽  
Vol 6 (27) ◽  
pp. 13373-13385 ◽  
Author(s):  
Xu-Long Xie ◽  
Yue Li ◽  
Jia-Zhuang Xu ◽  
Zheng Yan ◽  
Gan-Ji Zhong ◽  
...  
Keyword(s):  
Shear Stress ◽  
Hierarchical Structure ◽  
Mechanical Performance ◽  
Butylene Succinate ◽  
The Hierarchical Structure ◽  
Reinforcement And Toughening

The simultaneous reinforcement and toughening of poly(butylene succinate) was achieved via an oriented hierarchical structure induced by oscillation shear stress and promoted by poly(l-lactide).

Simultaneous improvement of strength and toughness in fiber reinforced isotactic polypropylene composites by shear flow and a β-nucleating agent

RSC Advances ◽  
2014 ◽  
Vol 4 (28) ◽  
pp. 14766-14776 ◽  
Author(s):  
Yan-Hui Chen ◽  
Zhang-Yong Huang ◽  
Zhong-Ming Li ◽  
Jian-Hua Tang ◽  
Benjamin S. Hsiao
Keyword(s):  
Shear Flow ◽  
Glass Fiber ◽  
Isotactic Polypropylene ◽  
Nucleating Agent ◽  
Core Structure ◽  
Fiber Reinforced ◽  
Polypropylene Composites ◽  
Glass Fiber Reinforced ◽  
Strength And Toughness

Glass fiber reinforced isotactic polypropylene composites with specific skin–core structure demonstrate simultaneous improvement of strength and toughness.

Dispersion Studies of Agglomerates in Steady and Dynamic Flows of Polymeric Materials

2002 ◽  
Vol 75 (1) ◽  
pp. 119-132 ◽  
Author(s):  
P. Levresse ◽  
I. Manas-Zloczower ◽  
D. L. Feke
Keyword(s):  
Shear Flow ◽  
Polymeric Materials ◽  
Oscillatory Shear ◽  
Hydrodynamic Dispersion ◽  
Low Density ◽  
Flow Conditions ◽  
Erosion Rates ◽  
Oscillatory Shear Flow ◽  
Steady Shear Flow ◽  
Dynamic Flows

Abstract The hydrodynamic dispersion of spherical calcium carbonate agglomerates was studied under both steady and oscillatory shear-flow conditions. For a given intensity of steady shear flow, erosion rates were strongly influenced by the cohesive strength of the agglomerates with less cohesive, low-density agglomerates exhibiting faster erosion than high-density agglomerates. The dispersion kinetics were also affected by the extent of matrix infiltration within the agglomerate, with more infiltration resulting in reduced erosion rates. Experiments conducted in oscillatory shear flow fields provided new insights on local mechanisms of erosion.

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