نانوکامپوزیت‌های پلیمری خودترمیم‌

نوع مقاله: تالیفی

نویسندگان

گروه نانومواد، دانشکده نانوفناوری، پردیس علوم و فناوری نوین، دانشگاه سمنان

چکیده

مواد خودترمیم با قابلیت ترمیم و تعمیر تخریب‌ها و آسیب‌های ایجادشده از راه سازوکارهای عمدتا الهام‌گرفته از طبیعت، می‌توانند با ضریب اطمینان زیاد در شرایط کاربردی استفاده شوند. رویکردهای ایجاد پدیده خودترمیمی در مواد، شامل ترمیم بدون دخالت یا با دخالت محرک خارجی است که به‌ترتیب ترمیم خودزا یا طبیعی و ترمیم خودفرمان یا مصنوعی نامیده می‌شوند. از مهم‌ترین سازوکارهای خودترمیمی در کامپوزیت‌های با ماتریس پلیمری می‌توان به رهایش عامل ترمیم، اتصالات عرضی برگشت‌پذیر، الکتروهیدرودینامیک، رسانندگی، اثر حافظه شکلی، مهاجرت نانوذرات و هم‌رسوبی اشاره کرد. با توجه به نوظهوربودن تهیه و به‌کارگیری مواد خودترمیم، به‌کارگیری نانوذرات در کامپوزیت‌های ماتریس پلیمری می‌تواند فرصت مغتنمی را با هدف ایجاد قابلیت خودترمیمی و بهبود خواص ایجاد کند. در مقاله حاضر، مطالعات و مدل‌سازی‌های نظری انجام‌گرفته در راستای درک کامل رفتار نانوکامپوزیت‌های خودترمیم ارزیابی می‌شود. سپس، انواع کامپوزیت‌های ماتریس پلیمری مانند هیدروژل‌ها و کامپوزیت‌های دارای نانومواد کربنی به‌عنوان مهم‌ترین نانوکامپوزیت‌های با قابلیت خودترمیمی معرفی و مطالعات انجام‌یافته در این راستا بررسی می‌شود. از مهم‌ترین نانوذرات استفاده‌شده در کامپوزیت‌‌های پلیمری خودترمیم می‌توان به نانولوله‌های کربنی، گرافن اکسید، خاک رس اصلاح‌شده، نانولوله‌های هالوسیت، طلا و نقره اشاره کرد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Self-Healing Polymer Nanocomposites

نویسندگان [English]

  • Hassan Abdoos
  • Ahmad Seyyedi
Nanotechnology Department, Faculty of New Science and Technology, Semnan University, Semnan, Iran
چکیده [English]

Self-healing materials with repair or healing ability of damages can be used with high reliability under service conditions. Approaches to the creation of a self-healing phenomenon in materials include: healing without or with internal or external interferences, which are referred to autogenic and autonomic repair, respectively. The most important self-healing mechanisms in polymer based composites are: the release of healing agent, reversible cross-links, electrohydrodynamics, conductivity, shape memory effect, nanoparticle migration and co-deposition. Since the production and use of self-healing materials is in its early stage, the use of nanoparticles in polymer-based composites can provide a great opportunity to create self-healing capabilities and improve properties. In this paper, the results of theoretical studies and models are considered in order to fully understand the self-healing behavior of nanocomposites and then various polymer- based composites such as hydrogels (containing nanoclay, gold nanoparticles, carbon nanomaterials) and composites (containing carbon nanomaterials and other nanoparticles) are introduced and investigated as the most important nanocomposites with self-healing capabilities. The most widely used nanoparticles in self-healing polymers include carbon nanotubes, graphene oxide, organoclay, halloysite nanotubes, gold and silver.

کلیدواژه‌ها [English]

  • self-healing material
  • autogenic repair
  • autonomic repair
  • polymer-based nanocomposite
  • mechanism
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