Olive leaf powder and boron reinforced polypropylene composites Zeytin yaprağı tozu ve bor katkılı polipropilen kompozitleri

SUMMARYPlastics have a wide application area in our daily life because of the properties such as being inexpensive, lightweight and easy to take shape. Plastics can lead to some problems such as endangering human health and reducing the life of the material, because the plastic surfaces are so available for microorganisms to form a biofim by holding onto the surface easily. Researches for antibacterial materials containing various natural and inorganic substances has been increased and become more important because of that people are often infected by microorganisms such as bacteria, molds, yeasts, and viruses in the environment in which they live. In recent years, increasing demand for antimicrobial materials and widespread use of these materials have necessitated the development of products with high quality through new studies.Antimicrobial agents must have some important properties such as heat resistance, the solubilization of the plasticizer, compatibility with the polymer, low leakage rate, UV resistance, being harmless to the environment as well as being effective against the microorganisms to be applied in plastics. Polymer composites containing antimicrobial additives are widely used in many areas especially in hospitals, biocompatible implants, toy industry, food production and packing, medical device industry, home appliance industry and construction materials.Microorganisms cause serious problems in the home appliance industry particularly in washing machines. Biofilm is composed by origin of tap water, human skin and contaminated textile products in detergent drawer and box of washing machines after a certain period of use. Biofilm formation consisted in the washing machine drawers endangers human health, reduces perceptual quality, shortens the machine life and requires constant cleaning and maintenance. This circumstance increases service requirements after-sales of the machine and creates customer dissatisfaction.In this study, antimicrobial composite materials developed by adding ulexite (boron mineral) and olive leaf powder into the copolymer matrix material have been studied for using in washing machine detergent box and drawer.In this thesis, antimicrobial agents are mixed as individually (5-10-15) and jointly (10-15) with the copolymer material by using a twin-screw extruder and then pelleted. Then the pellets were formed into plates in hot and cold presses by pouring into molds in certain sizes. JIS Z 2801 standard has been implemented to the plates in order to determine the antimicrobial activity. The Aging test was conducted to determine the antimicrobial activity time. Fourier Transform Infrared Spectroscopy (FTIR) analysis was performed to the composite plates in order to see structural features. Mechanical properties were evaluated by tensile testing. Interface morphology was observed via Scanning electron microscope (SEM).The results showed that the best antimicrobial effect is in the composite materials which ulexite and olive leaf powder are used together. The synergistic effect was created by using the combination of two additives together. But after the aging test, the antimicrobial activity of the composite materials is lost. The causes and possible solution methods were discussed under this study. It is seen in SEM analysis that the size of the ulexite and olive leaf powder is not homogeneous and also the agglomeration has occurred in the produced composites. It is seen that tensile strength of the composites is in closer values with the tensile strength of copolymer but, the elongation at break values were found to be decreased dramatically according to mechanical test results.

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antimicrobial materials machine industry washing composite activity tensile plates composites microorganisms because properties material copolymer powder ulexite machines results environment quality appliance agents effect resistance additives analysis products together detergent values strength problems health certain
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Eser Adı
(dc.title)
Olive leaf powder and boron reinforced polypropylene composites Zeytin yaprağı tozu ve bor katkılı polipropilen kompozitleri
Eser Sahibi
(dc.contributor.author)
Kara, Hilal
Tez Danışmanı
(dc.contributor.advisor)
M.Özgür Seydibeyoğlu
Yayıncı
(dc.publisher)
Graduate School of Sciences and Engineering
Tür
(dc.type)
Yüksek Lisans
Açıklama
(dc.description)
xxiv, 95 sayfa : resim, tablo
Açıklama
(dc.description)
30 cm.
Özet
(dc.description.abstract)
SUMMARYPlastics have a wide application area in our daily life because of the properties such as being inexpensive, lightweight and easy to take shape. Plastics can lead to some problems such as endangering human health and reducing the life of the material, because the plastic surfaces are so available for microorganisms to form a biofim by holding onto the surface easily. Researches for antibacterial materials containing various natural and inorganic substances has been increased and become more important because of that people are often infected by microorganisms such as bacteria, molds, yeasts, and viruses in the environment in which they live. In recent years, increasing demand for antimicrobial materials and widespread use of these materials have necessitated the development of products with high quality through new studies.Antimicrobial agents must have some important properties such as heat resistance, the solubilization of the plasticizer, compatibility with the polymer, low leakage rate, UV resistance, being harmless to the environment as well as being effective against the microorganisms to be applied in plastics. Polymer composites containing antimicrobial additives are widely used in many areas especially in hospitals, biocompatible implants, toy industry, food production and packing, medical device industry, home appliance industry and construction materials.Microorganisms cause serious problems in the home appliance industry particularly in washing machines. Biofilm is composed by origin of tap water, human skin and contaminated textile products in detergent drawer and box of washing machines after a certain period of use. Biofilm formation consisted in the washing machine drawers endangers human health, reduces perceptual quality, shortens the machine life and requires constant cleaning and maintenance. This circumstance increases service requirements after-sales of the machine and creates customer dissatisfaction.In this study, antimicrobial composite materials developed by adding ulexite (boron mineral) and olive leaf powder into the copolymer matrix material have been studied for using in washing machine detergent box and drawer.In this thesis, antimicrobial agents are mixed as individually (5-10-15) and jointly (10-15) with the copolymer material by using a twin-screw extruder and then pelleted. Then the pellets were formed into plates in hot and cold presses by pouring into molds in certain sizes. JIS Z 2801 standard has been implemented to the plates in order to determine the antimicrobial activity. The Aging test was conducted to determine the antimicrobial activity time. Fourier Transform Infrared Spectroscopy (FTIR) analysis was performed to the composite plates in order to see structural features. Mechanical properties were evaluated by tensile testing. Interface morphology was observed via Scanning electron microscope (SEM).The results showed that the best antimicrobial effect is in the composite materials which ulexite and olive leaf powder are used together. The synergistic effect was created by using the combination of two additives together. But after the aging test, the antimicrobial activity of the composite materials is lost. The causes and possible solution methods were discussed under this study. It is seen in SEM analysis that the size of the ulexite and olive leaf powder is not homogeneous and also the agglomeration has occurred in the produced composites. It is seen that tensile strength of the composites is in closer values with the tensile strength of copolymer but, the elongation at break values were found to be decreased dramatically according to mechanical test results.
Kayıt Giriş Tarihi
(dc.date.accessioned)
01.11.2022
Açık Erişim Tarihi
(dc.date.available)
2022-11-01
Yayın Tarihi
(dc.date.issued)
2016
Yayın Dili
(dc.language.iso)
eng
Konu Başlıkları
(dc.subject)
Mühendislik - Mikroorganizma - Plastik Malzemeler
Konu Başlıkları
(dc.subject)
Antimikrobiyal maddeler - Kopolimer malzeme
Konu Başlıkları
(dc.subject)
Fuourier Kızılötesi Spektroskopi
Tek Biçim Adres
(dc.identifier.uri)
https://hdl.handle.net/11469/2653
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