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Article
Improvement of the mechanical properties of pores silicone rubber/chitosan/sodium bicarbonate composites using for burn dressings

Author: Noor Hadi Aysa
Journal: Muthanna Medical Journal مجلة المثنى الطبية ISSN: 2226146x Year: 2017 Volume: 4 Issue: 2 Pages: 120-125
Publisher: Al-Muthanna University جامعة المثنى

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Abstract

The aimed of this study is prepared porous composites of silicone rubber (SR) and sodium bicarbonate (NaHCO3/SR/Chitosan) composites by mixing the medical grade liquid silicone rubber LSR with different ratios of both NaHCO3 and Chitosan (prepared from fish shells) by hand and studied their physical and mechanical properties such as tensile tests, tear resistance, hardness and compression. The results confirmed that NaHCO3/SR/Chitosan blend mechanical properties of the composites were influenced significantly by the blowing effect of sodium bicarbonate.


Article
Development the Physical Properties of Polymeric Blend (SR/ PMMA) by Adding various Types of Nanoparticles, Used for Maxillofacial Prosthesis Applications

Authors: Sihama I. Salih --- Jawad K. Oleiwi
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2019 Volume: 37 Issue: 4part (A) Engineering Pages: 120-127
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

As maxillofacial defects increased due to cancer; it becamenecessary to select high-quality prosthetic materials in this field. Siliconerubber is widely used in damaged maxillofacial affected areas replacementsurgery as bio material. The aim of this research, prepared a nano compositesmaterials, from polymer blend (silicone rubber: 5% PMMA) reinforced bydifferent types of nano-powders; pomegranate Peels Powder (PPP), Seedspowder of dates Ajwa (SPDA) and TiO2 nano-powders with loading level (0.0,0.1, 0.2, 0.3 and 0.4%). Some physical properties such as density, waterabsorption, and Thermo-Physical test, FTIR analysis, as well as, FTIR,antibacterial tests were done on prepared samples. The results showed thatthe composites material based of polymer blend with optimum percent are of0.2% of pomegranate Peels Powder (PPP), 0.3% of Seeds powder of datesAjwa (SPDA) and 0.1% of TiO2 nano-powders that have ideal characteristic.Also for antibacterial tests, polymeric blend composites with optimum percentof this nano-powders show that more antibacterial efficiency against S.aureusbacteria than E.coli bacteria.


Article
Prevent Intravenous Therapy (IV) Contamination by Addition of Magnesium Oxide Nanoparticles to Silicone Rubber

Authors: Auda Jabbar --- Braihi Jaleel Kareem --- Jaleel Kareem Ahmed --- Rami Sattar Jabbar
Journal: Journal of University of Babylon مجلة جامعة بابل ISSN: 19920652 23128135 Year: 2019 Volume: 27 Issue: 1
Publisher: Babylon University جامعة بابل

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Abstract

Antibacterial material nanocomposites are prepared to manufacture intravenous therapy (IV). These composites prepared by adding Magnesium oxide nano powder (MgO NPs)with a different percent (3, 6, and 9 wt %) to Silicone rubber (SR). The activity of this antibacterial material was inspected againstS. aureus and E.coli microorganisms byusing Agar Well Diffusion method.Results showed that the addition of MgO NPs to SiR causes the following enhancement the antibacterial activity against E.coli and S.aureus by 7.1% and 27.1% respectively, increasing tensile strength by 65.5%, increasing the hardness by11.25%, increasing the wear resistance by 84.5%,increasing surface bearing index (Sbi) by 80.5% , increasing in core fluid retention (Sci) by 8.5%, decreasingsurface roughness (Sa) by 65%, decreasingcore roughness depth (Sk) by 67% and enhancement the wettability by decreases contact angle to minimum value.

المواد النانوية المتراكبة المضادة للبكتيريا تم تحضيرها لاستخدامها كأنابيب لادخال العلاج عن طريق الوريد (IV). حيث حضرت هذه المركبات بإضافة مسحوق أكسيد المغنيسيوم النانوي (MgO NPs) بنسب وزنية مختلفة (3،6،و9) وزن% إلى مطاط السيليكون (SR) وتم فحص فعالية هذه المادة المتراكبة المضادة للبكتيريا ضد بكتيريا S. aureus وE. coli باستخدام طريقة Agar Well Diffusion.أظهرت النتائج أن إضافة MgO NPs إلى SR يؤدي إلى تحسين الفعالية المضادة للبكتيريا ضدE. coli و S.aureus بنسبة 7.1 ٪ و 27.1 ٪ على التوالي ، وزيادة قوة الشد بنسبة 65.5 ٪ ، وزيادة الصلابة بنسبة 11.25 ٪ ، وزيادة مقاومة البلى بنسبة 84.5 ٪ ، وزيادة مؤشر تحمل السطح (Sbi) بنسبة 80.5 ٪ ، وزيادة في قابلية خزن السوائل (Sci) بنسبة 8.5 ٪ ، وخفض خشونة السطح (Sa) بنسبة 65 ٪ ، وخفض عمق الخشونة الأساسية (SK) بنسبة 67 ٪ و تحسين قابلية الترطيب للسطوح من خلال تقليل زاوية التلامس إلى اقل قيمة.

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