共查询到20条相似文献,搜索用时 15 毫秒
1.
Mohammad Nahid Siddiqui Halim Hamid Redhwi Dimitris S. Achilias Elena Kosmidou Eythimia Vakalopoulou Maria D. Ioannidou 《Journal of Polymers and the Environment》2018,26(2):423-433
One of the major disadvantages of polymers when used in food-contact applications is that they are very susceptible to microbial attack. On the other hand, silver nanoparticles have received increased attention as novel antimicrobial agents. Therefore, the introduction of silver nanoparticles into conventional polymers results in new materials with improved properties. In this investigation, colloidal silver nanoparticles using an environmentally friendly procedure were synthesized. An aqueous solution of AgNO3 was used as a silver precursor with ‘green’ reducing agents either different types of honey, or β-d-glucose. In the first case, different pH values, as well as the addition of poly(ethylene glycol), PEG were studied, while in the latter, the effect of reduction time in the presence of PEG with various average molecular weights was examined. Properties of the nanoparticles were measured using X-Ray diffraction, UV–Vis and FTIR spectroscopy. Using honey it seems that spherical particles are produced with the smaller average particle size obtained at pH 8.5. Use of honey has the advantage of being a natural product, although its main drawback is that its composition varies and it cannot be predefined to result in reproducible results. Use of β-d-glucose results in stable silver nanoparticles with small average particle size after 24 h reduction. The addition of low molecular weight PEG seems to be beneficial in the production of stable nanoparticles. Finally, the antimicrobial activity of the nanoparticles produced was investigated at different concentrations on both Gram positive and negative bacteria, such as Bacillus cereus, Bacillus subtilis, Escherichia coli and Staphylococcus aureus. 相似文献
2.
Aljohny Bassam Oud Almaliki Abdullah Abdulaziz Ali Anwar Yasir Ul-Islam Mazhar Kamal Tahseen 《Journal of Polymers and the Environment》2021,29(10):3252-3262
Journal of Polymers and the Environment - In this research work, a green method of using Saussurea costus extract for the synthesis of silver nanoparticles (AgNPs) is developed. Analysis of the... 相似文献
3.
Journal of Polymers and the Environment - Environmental concerns and the positive aspects of biowaste materials gained the attention of researchers to use them as filler materials in fabricating of... 相似文献
4.
Mortazavi-Derazkola Sobhan Yousefinia Ali Naghizadeh Ali Lashkari Sajad Hosseinzadeh Mostafa 《Journal of Polymers and the Environment》2021,29(11):3539-3547
Journal of Polymers and the Environment - Nowadays, many chemical methods have been proposed for the synthesis of silver nanoparticles, but green synthesis has received more attention due to its... 相似文献
5.
Ayrilmis Nadir Yurttaş Elif Durmus Ali Özdemir Ferhat Nagarajan Rajini Kalimuthu Mayandi Kuzman Manja Kitek 《Journal of Polymers and the Environment》2021,29(8):2409-2420
Journal of Polymers and the Environment - The technological, thermal, and antimicrobial properties of biocomposite films produced from polylactic acid (PLA) and thermally treated wood flour with in... 相似文献
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Hasan Md. Sabbir Al Foisal Jannat Khan G. M. Arifuzzaman Jahan Rownok Hasanuzzaman Md. Alam Md. Shamsul Karim M. Minnatul Gafur M. A. Khan Muhammad Angkan Sabur Md. Abdus 《Journal of Polymers and the Environment》2022,30(7):2875-2887
Journal of Polymers and the Environment - Modification of cellulose with silver nanoparticles produces various nanocomposites with significantly developed properties. This work aims to prepare a... 相似文献
7.
Yu Jianping Cheng Liying Jia Zhongwei Han Xiaojing Xu Huan Jiang Jianye 《Journal of Polymers and the Environment》2022,30(4):1330-1343
Journal of Polymers and the Environment - Currently, the synthesis of silver nanoparticles (AgNPs) was utilized for various life-saving biomedical applications. Herein, we report the synthesis and... 相似文献
8.
Jirapornchai Suksaeree Akkharakunya Thuengernthong Kanchala Pongpichayasiri Pattwat Maneewattanapinyo Sukanya Settharaksa Wiwat Pichayakorn 《Journal of Polymers and the Environment》2018,26(12):4369-4375
This research aimed to prepare the silver nanoparticles (AgNPs)-loaded antimicrobial wound dressing patch using ethyl cellulose as a matrix membrane and diethyl phthalate as a plasticizer. The polymer suspension was homogeneously mixed with plasticizer, and then added to the colloidal AgNPs suspension. This mixture was poured into Petri dish and subsequently dried in a hot air oven at 80?±?2 °C for 10 h. The minimum inhibition concentration of the colloidal AgNPs suspension was 2.5 µg/ml. The AgNPs-loaded antimicrobial wound dressing patch was evaluated for physical properties by differential scanning calorimeter, X-ray diffraction, scanning electron microscope, and in vitro study. The antimicrobial wound dressing patch did not exhibit any interaction between the matrix membrane and AgNPs. The AgNPs were evenly dispersed in the patch. The patch could control the release of silver at 102.98?±?4.11% over 12 h. Although the AgNPs-loaded antimicrobial wound dressing patches can be easily prepared by the simple method, in future studies antimicrobial wound dressing patch will be developed by employing different types of film forming agents. 相似文献
9.
Styrene (St) was graft-polymerized onto the surfaces of micro-sized silica gel particles, and the surface-grafted composite
particles PSt/SiO2 were obtained. With the surface-grafted composite particles PSt/SiO2 as a starting material, water-insoluble antibacterial materials with quaternary ‘onium’ salt-type were synthesized via two
polymer reaction steps. The grafted polystyrene was first chloromethylated, resulting in grafted particles CMPS/SiO2, and then quaterisation (QN) and quaternary phosphonium reaction (QP) were conducted with triethylamine, tri-n-butylamine and triphenyl phosphine as reagents, respectively. Two kinds of water-insoluble antibacterial materials, QN-PSt/SiO2 and QP-PSt/SiO2 were prepared. Their antibacterial property was mainly investigated by using Escherichia coli (E. coli) as a model bacterium and by adopting colony count method. The relationship between the chemical structure of the antibacterial
group and antimicrobial activity for the water-insoluble antibacterial materials was studied in detail, and their antibacterial
mechanism was investigated by TTC-dehydrogenase activity determination and extracellular DNA and RNA measurement methods.
The experimental results show that QN-PSt/SiO2 and QP-PSt/SiO2 possess strong antibacterial activity. The main factors affecting the antibacterial ability of the water-insoluble materials
are the chemical structure of the antibacterial groups, the bound density of the antibacterial groups on the surface of the
water-insoluble antibacterial materials as well as the pH value of the medium. QP-PSt/SiO2 has stronger antibacterial activity than QN-PSt/SiO2; the QN-PSt/SiO2 prepared with tri-n-butylamine has stronger antibacterial activity than that prepared with triethylamine; the water-insoluble material with higher
bound density of the antibacterial groups has stronger antibacterial ability; as the pH value of the medium is over the isoelectric
point of E. coli, the antibacterial ability is strengthened with the increase of pH value. 相似文献
10.
Grazyna Bystrzejewska-Piotrowska Jerzy Golimowski Pawel L. Urban 《Waste management (New York, N.Y.)》2009,29(9):2587-2595
This literature review discusses specific issues related to handling of waste containing nanomaterials. The aims are (1) to highlight problems related to uncontrolled release of nanoparticles to the environment through waste disposal, and (2) to introduce the topics of nanowaste and nanotoxicology to the waste management community. Many nanoparticles used by industry contain heavy metals, thus toxicity and bioaccumulation of heavy metals contained in nanoparticles may become important environmental issues. Although bioavailability of heavy metals contained in nanoparticles can be lower than those present in soluble form, the toxicity resulting from their intrinsic nature (e.g. their size, shape or density) may be significant. An approach to the treatment of nanowaste requires understanding of all its properties – not only chemical, but also physical and biological. Progress in nanowaste management also requires studies of the environmental impact of the new materials. The authors believe Amara’s law is applicable to the impact of nanotechnologies, and society might overestimate the short-term effects of these technologies, while underestimating the long-term effects. It is necessary to have basic information from companies about the level and nature of nanomaterials produced or emitted and about the expectation of the life cycle time of nanoproducts as a basis to estimate the level of nanowaste in the future. Without knowing how companies plan to use and store recycled and nonrecycled nanomaterials, development of regulations is difficult. Tagging of nanoproducts is proposed as a means to facilitate separation and recovery of nanomaterials. 相似文献
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Ghobashy Mohamed mohamady Sayed Waheed A. A. El-Helaly Alexandra 《Journal of Polymers and the Environment》2021,29(10):3364-3374
Journal of Polymers and the Environment - A Green nanomaterial synthesis could be considered as an alternative bio-controller source of insect pest management as well as saving the environment.... 相似文献
13.
Octavio Cota-Arriola Mario Onofre Cortez-Rocha Josafat Marina Ezquerra-Brauer Jaime Lizardi-Mendoza Armando Burgos-Hernández Rosario Maribel Robles-Sánchez Maribel Plascencia-Jatomea 《Journal of Polymers and the Environment》2013,21(4):971-980
Recent studies have demonstrated the antibacterial effect of micro and nanoparticles of chitosan (CS) crosslinked with sodium tripolyphosphate (TPP), and incorporating metallic ions, bringing that the size, shape, and zeta potential are related to the antimicrobial potential. However, there are few studies on the antifungal activity and the effect of TPP on the antimicrobial potential. Micro and nanoparticles were prepared from CS by ionotropic gelation with TPP, and structurally characterized by transmission and scanning electron spectroscopy, and Fourier transformed infrared spectroscopy. Depending on the concentration of CS and TPP, spherical particles were obtained from 80 nm to 20 μm. Subsequently, particles were evaluated for their antifungal potential against Aspergillus parasiticus assessing radial growth, spore germination, and morphological changes. An increase in the antifungal potential compared with CS in solution was observed, inhibiting the development of the fungus causing clear morphological changes in both, hyphae and spores. Particle size and the availability of functional groups of CS/TPP (amino group and phosphate), suggest a possible synergistic effect between CS and TPP. 相似文献
14.
Journal of Polymers and the Environment - Owing to develop the utilization of biowaste materials and minimize the usage of plastic materials, Orange peel Powder (OPP) biowaste is chosen as filler... 相似文献
15.
Shajari Mozhgan Zamani Mostafa Ahmadi Nahid Rostamizadeh Kobra Shapouri Reza 《Journal of Polymers and the Environment》2022,30(6):2658-2668
Journal of Polymers and the Environment - In this research, the antibacterial effect of curcumin entrapped in polymeric nanoparticles (mPEG-PCL/curcumin) on resistant bacteria were investigated.... 相似文献
16.
Banerjee Aparna Das Debasis Andler Rodrigo Bandopadhyay Rajib 《Journal of Polymers and the Environment》2021,29(8):2701-2709
Journal of Polymers and the Environment - Nowadays when control of environmental toxicity is a matter of concern, the focus of the researchers is to find an eco-friendly process. Considering the... 相似文献
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Gasti Tilak Hiremani Vishram D. Kesti Sheetal Suresh Vanjeri Vinayak N. Goudar Naganagouda Masti Saraswati P. Thimmappa Shivasharana Chandrabanda Chougale Ravindra B. 《Journal of Polymers and the Environment》2021,29(10):3347-3363
Journal of Polymers and the Environment - In this study, we prepared Poly (vinyl alcohol) (PVA)/Guar gum (GG) based nanocomposite films with a different weight ratio of silver nanoparticles (AgNPs)... 相似文献
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Alghamdi Haifa Mohammed Abutalib M. M. Rajeh A. Mannaa Mohammed A. Nur Omer Abdelrazek E. M. 《Journal of Polymers and the Environment》2022,30(9):3865-3874
Journal of Polymers and the Environment - As the request for ready-made food grows, it’s more important than ever to develop effective antimicrobial food packaging materials to assure... 相似文献