نوع مقاله : مقاله کامل پژوهشی
نویسندگان
1 پژوهشگر، دانشکده مهندسی مواد و متالورژی، دانشگاه علم و صنعت ایران، تهران، تهران، ایران
2 استاد، دانشکده مهندسی مواد و متالورژی، دانشگاه علم و صنعت ایران، تهران، تهران، ایران
چکیده
در این پژوهش، هیدروژلهای ژلاتین/کیتوسان/اکسید روی بهروش ریختهگری محلول پلیمری در ترکیب با روش خشککردن انجمادی تهیه و تأثیر افزودن 5/1 درصد وزنی نانوذرات اکسید روی بر ویژگیهای ریزساختاری و فیزیکی ـ شیمیایی داربستهای کراسلینک شده یا 5/1 درصد وزنی جنیپین مطالعه شد. آنالیز تبدیل فوریه مادون قرمز نشاندهنده برهمکنشهای فیزیکی پلیمر و اکسید روی بود. با افزودن اکسید روی، میزان تخلخل هیدروژلها از حدود 93 به 94 درصد افزایش یافت (05/0 > P). تصاویر میکروسکوپ الکترونی روبشی (SEM) داربستهای نانوکامپوزیتی، نشاندهنده تشکیل ریزساختار متخلخلی از حفرات مشخص بههمپیوسته با متوسط اندازه حفرات 200 میکرون بود. توانایی جذب آب هیدروژلهای ژلاتین/کیتوسان در دمای اتاق و دمای 37 درجه سلسیوس با افزودن اکسید روی، بهترتیب، از 1043 به 988 و از 1206 به 1040درصد کاهش یافت، اما افزایش قابلتوجهی در سرعت تورم اولیه آنها دیده شد. با افزودن نانوذرات، تخریب برونتنی داربستها سریعتر رخ داد. با توجه به یافتههای این پژوهش، هیدروژلهای ژلاتین/کیتوسان/اکسید روی، که ویژگیهای ریزساختاری مطلوب (یعنی، توزیع یکنواختی از حفرات بههمپیوسته) و سرعت تورم اولیه بالایی دارد، بهمنزله بستری بالقوه برای استفاده در سامانههای دارویی یا حوزه مهندسی بافت پیشنهاد میشوند.
کلیدواژهها
موضوعات
عنوان مقاله [English]
Fabrication and Characterization of Gelatin/Chitosan/Zinc Oxide Nanocomposite Hydrogels Intended for Biomedical Applications
نویسندگان [English]
- Shadi Moshayedi 1
- Hossein Sarpoolaky 2
- Alireza Khavandi 2
1 Researcher, School of Materials and Metallurgical Engineering, Iran University of Science and Technology, Tehran, Tehran, Iran
2 Professor, School of Materials and Metallurgical Engineering, Iran University of Science and Technology, Tehran, Tehran, Iran
چکیده [English]
In the present study, gelatin/chitosan/zinc oxide hydrogels were prepared through solvent casting method in combination with lyophilization. In addition, the effects of adding 1.5 wt % zinc oxide nanoparticles on the microstructural and physico-chemical characteristics of genipin-crosslinked scaffolds were evaluated. The porosity of the newly formed hydrogels increased from about 93 up to 94 % (P < 0.05). Images taken by a Scanning Electron Microscope (SEM) illustrates the formation of a porous microstructure of distinct interconnected holes with an average size of 200 microns. Water absorption capacity of nanocomposite hydrogels at room temperature and 37 °C decreased from 1043 to 988 and 1206 to 1040 %, respectively; however, a significant increase in their initial swelling rate was observed. Upon adding nanoparticles, the in vitro degradation of scaffolds occurred faster than usual. According to the findings of this research, gelatin/chitosan/zinc oxide hydrogels which is characterized by favorable microstructural characteristics (i.e., uniform distribution of interconnected pores) and high initial swelling rate can be used as a potential substrate in the field of tissue engineering.
کلیدواژهها [English]
- Hydrogel
- Gelatin
- Chitosan
- Zinc Oxide
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