مطالعه خواص فیزیکی و مکانیکی پوشش نانوکامپوزیتی بر پایه پلی کاپرولاکتون-کیتوسان-شیشه زیست‌فعال S58 محتوی مقادیر مختلف شیشه زیست‌فعال

محورهای موضوعی : بیومواد

محمدحسین حدادی ¹ , ابراهیم کرمیان ^{2 *} , حمیدرضا بخششی راد ³ , مسعود کثیری عسگرانی ⁴

1 - مرکز تحقیقات مواد پیشرفته، گروه مهندسی مواد، دانشگاه آزاد اسلامی، واحد نجف آباد، نجف آباد، ایران.
2 - مرکز تحقیقات مواد پیشرفته، گروه مهندسی مواد، دانشگاه آزاد اسلامی، واحد نجف آباد، نجف آباد، ایران.
3 - مرکز تحقیقات مواد پیشرفته، گروه مهندسی مواد، دانشگاه آزاد اسلامی، واحد نجف آباد، نجف آباد، ایران.
4 - مرکز تحقیقات مواد پیشرفته، گروه مهندسی مواد، دانشگاه آزاد اسلامی، واحد نجف‌آباد، نجف‌آباد، ایران

تاریخ دریافت : 1403/08/10 تاریخ پذیرش : 1403/10/19 تاریخ انتشار : 1404/06/24

کلید واژه: پلی کاپرولاکتون, کیتوسان, خواص فیزیکی و مکانیکی, شیشه زیست‌فعال S58.,

چکیده مقاله :

در این پژوهش، پوشش نانوکامپوزیتی بر پایه پلی کاپورلاکتون-کیتوسان، در حضور مقادیر صفر، یک، سه و پنج درصد وزنی شیشه زیست‌فعال S58 سنتز شده به روش سل-ژل، تهیه گردید و تاثیر حضور مقادیر مختلف شیشه زیست‌فعال بر میزان زاویه تماس، جذب آب، زبری سطح، استحکام کششی و رفتار خوردگی آن، توسط مشخصه‌یابی‌های متالورژیکی ارزیابی گردید. طبق نتایج حاصل از آزمون‌های زاویه تماس، درصد جذب آب، زبری سطح و استحکام کششی در نمونه‌های سنتز شده، افزایش آبدوستی با توجه به کاهش زاویه تماس (2/3 و 6/5 درصد)، افزایش جذب آب (14/13 و 21/23 درصد)، افزایش زبری سطح (16/70 و 44/148 درصد) و افزایش استحکام کششی (26/45 و 70/48 درصد) به ترتیب در نمونه PCB3 و PCB5 نسبت به PCB0 گزارش گردید. طبق نتایج طیف‌سنجی امپدانس الکتروشیمیایی و آزمون پلاریزاسیون خطی نمونه PCB3، افزایش پتانسیل خوردگی پوشش تا 29/0- ولت و کاهش چگالی جریان خوردگی تا 05/2 میکروآمپر بر سانتیمتر مکعب نسبت به سایر نمونه‌ها گزارش شد. بنابراین، طبق نتایج حاصل از پژوهش، حضور مقدار بهینه 3 درصد وزنی شیشه زیست‌فعال منجر به بهبود خواص فیزیکی و مکانیکی پوشش مورد بررسی از طریق افزایش مقاومت به خوردگی پوشش، کاهش زاویه تماس، افزایش درصد جذب آب، آب‌دوستی و زبری سطح در نمونه PCB3 گردید.

چکیده انگلیسی:

In this research, nanocomposite coating based on polycaprolactone-chitosan was prepared in the presence of zero, one, three and five weight percent of 58S bioactive glass synthesized by sol-gel method, and the effect of the presence different amounts of bioactive glass were evaluated on contact angle, water absorption, surface roughness, tensile strength and corrosion behavior by metallurgical characterization. According to the results of the contact angle tests, the percentage of water absorption, surface roughness and tensile strength in the synthesized samples, the increase in hydrophilicity due to the decrease in the contact angle (3.2 and 5.6 percent), the increase in water absorption (13.14 and 23.21 percent), an increase in surface roughness (70.16 and 148.44 percent) and an increase in tensile strength (45.26 and 48.70 percent) were reported in PCB3 and PCB5 samples, respectively, compared to PCB0. According to the results of electrochemical impedance spectroscopy and linear polarization test of the PCB3 sample, an increase in the corrosion potential of the coating up to -0.29 V and a decrease in the corrosion current density up to 2.05 microamps per cubic centimeter was reported compared to other samples. Therefore, according to the results of the research, the presence of the optimal amount of 3% by weight of bioactive glass leads to the improvement of the physical and mechanical properties of the investigated coating by increasing the corrosion resistance of the coating, reduction of the contact angle, increasing the percentage of water absorption, hydrophilicity, and surface roughness in The sample was PCB3.

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