Fabrication of Poly(Butylene Succinate) Composite Films with Silver Doped ZSM-5: Effect of Silver ZSM-5 on Antibacterial Activity and Biodegradable Behavior

2020 ◽  
Vol 990 ◽  
pp. 256-261
Author(s):  
Nissapa Wattanawong ◽  
Kanchana Chatchaipaiboon ◽  
Natchanan Sreekirin ◽  
Duangdao Aht-Ong
Keyword(s):  
Crystal Structure ◽  
Antibacterial Activity ◽  
High Efficiency ◽  
Composite Films ◽  
Filler Concentration ◽  
Butylene Succinate ◽  
Soil Burial Test ◽  
X Ray ◽  
Soil Burial ◽  
Silver Zeolite

This work was focused on the effects of filler concentration on the antibacterial activity and biodegradable behavior of poly (butylene succinate) (PBS) composite films containing silver exchanged zeolite ZSM-5 (SZSM-5). The composite films were prepared by chill roll cast film extrusion, by varying the silver zeolite content from 0.5 to 4 %wt. The silver content in zeolite was examined by energy dispersive X-ray spectroscopy (EDX). The morphology and crystal structure of silver zeolite were analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD) technique, respectively. The incorporation of silver did not influence the zeolite morphology and its crystal structure. The antibacterial action of composite films was investigated against gram-negative Escherichia coli and gram-positive Staphylococcus aureus. The results revealed that the PBS composite films containing SZSM-5 showed 99.9% of bacterial reduction. The optimal SZSM-5 content in PBS composite films was 0.5%wt because it was the lowest concentration that showed high efficiency of antibacterial behavior. In case of biodegradable ability, PBS composite films incorporated with 0.5%wt of SZSM-5 exhibited the degradation after three-month of soil burial test, although they exhibited slower rate than neat PBS films. The SEM micrographs of the films after soil burial test displayed the cavity on film surface, indicating the biodegradable properties of the films. PBS composite films incorporated with 0.5%wt of SZSM-5 showed the potential to be used as the food packaging.

Migration, physical and antibacterial properties of silver zeolite/poly(butylene succinate) composite films for food packaging applications

2019 ◽  
Vol 39 (3-4) ◽  
pp. 95-110 ◽  
Author(s):  
Nissapa Wattanawong ◽  
Kanchana Chatchaipaiboon ◽  
Natchanan Sreekirin ◽  
Duangdao Aht-Ong
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Antibacterial Activity ◽  
Food Packaging ◽  
Composite Films ◽  
Zeolite A ◽  
Color Analysis ◽  
Butylene Succinate ◽  
X Ray ◽  
Scanning Electron

Bacterial growth on food is a main factor in the reduction of food quality, leading to short-term food shelf life. Development of antibacterial packaging can inhibit the bacterial growth and extend food shelf life. Silver loaded zeolite was used as the antibacterial agent in this work. Three zeolites (different Si/Al ratio) such as zeolite A, zeolite Y, and zeolite Socony Mobil-5 (ZSM-5) incorporating with the same silver content were prepared. The characterization was carried out by energy dispersive X-ray spectroscopy, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption, and color analysis. Antibacterial activity of the three silver zeolites was tested against Escherichia coli and Staphylococcus aureus. Silver loaded zeolite ZSM-5 showed better bacterial inhibition than silver incorporated zeolite A and Y. For composite film preparation, silver loaded zeolite ZSM-5/poly(butylene succinate) composite films were prepared by varying silver loaded zeolite ZSM-5 concentrations and characterized by different techniques (mechanical test, scanning electron microscopy, and color analysis). Poly(butylene succinate) composite films filled with silver loaded zeolite ZSM-5 showed 99.9% of bacterial reduction within 24 h, indicating the effective antibacterial activity. From the silver migration results, the silver release from poly(butylene succinate) films was less than the limitation of European Food Safety Authority regulation, indicating the safety for food packaging applications.

Preparation, Characterisation, Crystal Structure and Antibacterial Activity of two Bis-Schiff Bases Containing a Piperazine Ring

2018 ◽  
Vol 42 (10) ◽  
pp. 512-514
Author(s):  
Rui-bo Xu ◽  
Xiao-tian Yang ◽  
Hai-nan Li ◽  
Peng-cheng Zhao ◽  
Jiao-jiao Li ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Bacillus Subtilis ◽  
Schiff Bases ◽  
Piperazine Ring ◽  
X Ray ◽  
X Ray Crystallography ◽  
Good Antibacterial Activity

Two new bis-Schiff bases containing a piperazine ring, N,N‘-bis(4-chlorobenzylidene)- and N,N‘-bis(4-cyanobenzylidene)-1,4-bis(3-aminopropyl)piperazine, were prepared by the reaction of N,N‘-bis(3-aminopropyl)piperazine with 4-chloro- and 4-cyanobenzaldehyde, respectively. The dichloro compound was fully identified by X-ray crystallography and it exhibited good antibacterial activity against Escherichia coli, Staphylococcus aureus and Bacillus subtilis.

Synthesis, Crystal Structure and Antibacterial Activity of 1D Chain Ca(II) Coordination Polymer

2011 ◽  
Vol 282-283 ◽  
pp. 96-99
Author(s):  
Xi Shi Tai
Keyword(s):  
Crystal Structure ◽  
Antibacterial Activity ◽  
Coordination Polymer ◽  
Chain Structure ◽  
Molar Conductance ◽  
Dimensional Chain ◽  
X Ray Diffraction ◽  
One Dimensional ◽  
X Ray ◽  
1D Chain

1D chain Ca(II) coordination polymer was synthesized and characterized by elemental analysis, molar conductance, IR and single-crystal X-ray diffraction, The results of crystal structure show that each Ca(II) ion forms eight-coordinated and the complex formed one dimensional chain structure by the oxygen atoms of carboxylate and water bridged. The antibacterial activity of the Ca(II) coordination polymer and the ligand were tested, the results show that the complex show considerable antibacterial activity against escherichia coli, bacillus subtilis and staphylococcus white.

scholarly journals Metallocenyl 7‐ACA Conjugates: Antibacterial Activity Studies and Atomic‐Resolution X‐ray Crystal Structure with CTX‐M β‐Lactamase

ChemBioChem ◽  
2020 ◽  
Vol 21 (15) ◽  
pp. 2187-2195
Author(s):  
Eric M. Lewandowski ◽  
Łukasz Szczupak ◽  
Aleksandra Kowalczyk ◽  
Gracia Mendoza ◽  
Manuel Arruebo ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Antibacterial Activity ◽  
Atomic Resolution ◽  
X Ray

scholarly journals Antibacterial Activity and Biodegradation of Cellulose Fiber Blends with Incorporated ZnO

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3399 ◽  
Author(s):  
Domen Malis ◽  
Barbka Jeršek ◽  
Brigita Tomšič ◽  
Danaja Štular ◽  
Barbara Golja ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Cellulose Fiber ◽  
Weight Fraction ◽  
High Antimicrobial Activity ◽  
Soil Burial Test ◽  
Gram Negative ◽  
Soil Burial ◽  
E Coli ◽  
Biodegradation Process ◽  
Antimicrobial Performance

This research aimed to study the influence of lyocell with incorporated ZnO (CLY) for antibacterial activity and biodegradation of fiber blends composed of viscose (CV), flax (LI), and CLY. Fiber blended samples with an increased weight fraction of CLY fibers were composed, and single CLY, CV and LI fibers were also used for comparison. Antibacterial activity was determined for the Gram-negative Escherichia coli and the Gram-positive Staphylococcus aureus bacteria. The biodegradation of fiber blends was investigated by the soil burial test. The results show that the single CLY fibers exhibited high antimicrobial activity against both E. coli and S. aureus bacteria and that the presence of LI fibers in the blended samples did not significantly affect antibacterial activity against E. coli, but drastically decreased the antibacterial activity against S. aureus. LI fibers strongly promoted the growth of S. aureus and, consequently, impaired the antimicrobial performance of ZnO against this bacterium. The presence of CLY fibers slowed down, but did not prevent, the biodegradation process of the fiber blends, even at the highest ZnO concentration. The soil that was in contact with the fiber blended samples during their burial was not contaminated to such an extent as to affect the growth of sprouts, confirming the sustainability of the fiber blends.

Synthesis, X-ray crystal structure, electrochemical and antibacterial activity of a silver(I) complex with α-bromo-cinnamaldehyde salicylhydrazone

2010 ◽  
Vol 35 (5) ◽  
pp. 507-511 ◽  
Author(s):  
Jun An Liu ◽  
Qing Li ◽  
Ming Ming Wang ◽  
Hui Wang ◽  
Guo Qing Gan ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Antibacterial Activity ◽  
X Ray

scholarly journals Corrigendum to

2022 ◽  
pp. 132424
Author(s):  
Amel Marir ◽  
Toma Nardjes Mouas ◽  
Barkahem Anak ◽  
Erwann Jeanneau ◽  
Amel Djedouani ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Antibacterial Activity ◽  
Computational Studies ◽  
X Ray

scholarly journals Effect of Rubberwood Content on Biodegradability of Poly(butylene succinate) Biocomposites

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Hemhong Anankaphong ◽  
Duanghathai Pentrakoon ◽  
Jirawut Junkasem
Keyword(s):  
Weight Loss ◽  
Chemical Structure ◽  
Physical Appearance ◽  
Outdoor Environment ◽  
Percentage Weight Loss ◽  
Butylene Succinate ◽  
Soil Burial Test ◽  
Soil Burial ◽  
Percentage Weight ◽  
Burial Time

Poly(butylene succinate) (PBS) biocomposites incorporated with rubberwood powder (RWP) were fabricated with various RWP weight fractions (i.e., 0 to 40% wt) by injection moulding process. The soil burial test was employed to examine the biodegradability of such biocomposites under outdoor environment for 60 days. The physical appearance, percentage weight loss, chemical structure, and mechanical properties before and after the soil burial test were determined. Apparent changes in physical appearance of the biocomposites from optical micrographs were detected in terms of surface morphology and colour. The percentage of crystallinity of PBS/RWP biocomposites was studied by the X-ray diffraction (XRD) technique, and the XRD pattern revealed a decrease in percentage of crystallinity due to enhancing RWP weight fractions. This may be attributed to a presence of rubberwood powders providing more disordered molecular chain arrangement of PBS matrix and also an agglomeration of the rubberwood powder content at greater concentration as seen in SEM micrographs. With increasing RWP weight fractions and burial time, the results exhibited a considerable change in chemical structure (essentially ester linkage due to biodegradation mechanism of PBS), relatively greater percentage weight loss, and a substantial decrease in flexural properties. Consequently, the results indicate that incorporating RWP enhances biodegradability of PBS/RWP biocomposites; that is, the biodegradation rate of biocomposites increases with increasing RWP weight fractions and burial time.

X-ray crystal structure of a Cu(II) complex with the antiparasitic drug tinidazole, interaction with calf thymus DNA and evidence for antibacterial activity

2014 ◽  
Vol 67 (2) ◽  
pp. 265-285 ◽  
Author(s):  
Ramesh Chandra Santra ◽  
Kushal Sengupta ◽  
Rajdip Dey ◽  
Tahsina Shireen ◽  
Piyal Das ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Antibacterial Activity ◽  
Calf Thymus Dna ◽  
X Ray ◽  
Antiparasitic Drug ◽  
Calf Thymus
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