مروری کوتاه بر اثر نانوذرات سیلیکا بر بلورینگی نانوکامپوزیت‌های برپایه‌ پلی‌اتیلن پرچگالی

نوع مقاله : تالیفی

نویسندگان

1 بخش مهندسی شیمی، دانشکده نفت و مهندسی شیمی، دانشگاه رازی، کرمانشاه

2 کرمانشاه، دانشگاه رازی، دانشکده نفت و مهندسی شیمی، بخش مهندسی شیمی، صندوق پستی 14971-67144

چکیده

امروزه انواع پلی‌اتیلن پرمصرف‌ترین پلیمرهای گرمانرم به ­شمار می­ روند که در صنایع مختلف استفاده می ­شوند. پلی‌اتیلن به‌علت خواص منحصر به‌فرد آن مانند هزینه‌ به‌صرفه‌ تولید و فرایندپذیری بسیار خوب، کاربردهای متعدد یافته است. اما خواص مکانیکی ضعیف این پلیمر در مقایسه با فلزات موجب شده است تا اغلب برای بهبود آن از مواد افزودنی همچون نانوذرات مختلف بهره گرفته شود. بدین دلیل در سال‌های اخیر، توسعه‌ نانوکامپوزیت‌های مختلف برپایۀ پلی‌اتیلن اهمیت ویژه‌ای یافته است. از نانوذرات معمول در حوزه‌ نانوکامپوزیت‌های پلیمری سیلیکاست که ویژگی‌های خاص این دسته از نانوذرات از جمله دسترسی آسان، سمّیت کم و مساحت سطح و ثبات مولکولی زیاد، آن­ها را به‌عنوان گزینه‌ مناسبی برای تقویت خواص فیزیکی و مکانیکی پلیمرها مطرح کرده است. همچنین در برخی موارد، به­ منظور برطرف کردن مشکل پراکنش نامطلوب نانوذرات و تشکیل کلوخه، اصلاح سطح این مواد معدنی با روش‌های مختلف مورد توجه پژوهشگران قرار گرفته است. در مطالعات اخیر، استفاده از نانوذرات سیلیس خالص و اصلاح سطح ­شده در ماتریس گرمانرم، از جمله پلی­ اتیلن، برای بهبود خواص فیزیکی و مکانیکی پلیمر گزارش شده است. در این مقاله، اثر نانوذرات سیلیکای خالص و انواع اصلاح سطح­ شدۀ آن بر بلورینگی نانوکامپوزیت ­های برپایۀ انواع پلی‌اتیلن در مطالعات مختلف مرور شده است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

A Brief Review of the Effect of Silica Nanoparticles on the Crystallinity of HDPE-Based Nanocomposites

نویسندگان [English]

  • Saeideh Hojatzadeh 1
  • Farshad Rahimpour 2
  • Esmail Sharifzadeh 2
1 Chemical Engineering Department,, Faculty of Petroleum and Chemical Engineering, Razi University,, Kermanshah
2 Chemical Engineering Department, Faculty of Petroleum and Chemical Engineering, Razi
چکیده [English]

Today, one of the most widely used thermoplastic polymers in the world is polyethylene, which is used in various industries. Polyethylene has found many applications due to its unique properties such as low cost of production and very good processability. However, the weak mechanical properties of this polymer compared to metals have led to the use of additives such as various nanoparticles to improve it in most cases. For this reason, in recent years the development of various nanocomposites based on polyethylene has become important. Silica is the common nanoparticles in the field of polymer nanocomposites, which the special features such as easy access, low toxicity, and high surface area, and molecular stability have made this nanoparticle a suitable option for improvement the physical and mechanical properties of polymers. Also, in some cases, in order to solve the problem of the improper dispersion and agglomeration of these nanoparticles, the surface modification of these mineral materials by different methods has been the focus of researchers. In the recent studies, the use of pure and surface-modified silica nanoparticles in thermoplastic matrix, including polyethylene has been reported to improvement the physical and mechanical properties of the polymer. In this paper, the effect of pure silica nanoparticle and its surface-modified types on the crystallinity of nanocomposite based on various types of polyethylene has been reviewed.

کلیدواژه‌ها [English]

  • silica
  • surface modification
  • polyethylene
  • crystallinity
  • nanocomposite

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