کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
828718 1470329 2015 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Toward high performance epoxy/halloysite nanocomposites: New insights based on rheological, curing, and impact properties
ترجمه فارسی عنوان
به سمت نانوکامپوزیت های اپوکسی / هالوویستی با کارایی بالا: بینش جدید بر اساس ویژگی های رئوولیک، پوسیدگی و ضربه
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی


• Addition of halloysite nanotubes considerably changed the rheological and curing behavior of epoxy.
• Toughening performance of halloysite nanotubes was highly affected by compound and process design.
• The shear yielding of epoxy deteriorated the performance of halloysite nanotubes as nanofiller.
• Halloysite nanotubes with longer and more uniform nanotubes had significantly higher toughening effect.

The present work is aimed to study the effects of various processing parameters such as mixing methods (ultrasonication and mechanical mixing), curing system and types of halloysite on the rheological, curing and impact behavior of epoxy nanocomposites reinforced with halloysite nanotubes (HNTs). It was shown that proper design of process and material is of crucial importance to get the full benefit of HNTs as reinforcing nanofiller. The viscosity of the uncured epoxy increased after the incorporation of HNTs, while the impact properties of the cured epoxy/HNTs nanocomposites were found to be highly dependent on the characteristics of base epoxy matrix, as determined by changing the type of curing agent. Compared to the commonly used mechanical mixing method, ultrasonication effectively improved the dispersion of HNTs in epoxy matrix, and considerably enhanced the viscosity and impact strength of the epoxy/HNTs nanocomposites, especially at high HNTs loading. Fracture mechanism studies revealed that shear yielding happened in the epoxy and the incorporation of HNTs deteriorated the impact properties of final epoxy nanocomposites. Types of HNTs had a significant effect on the impact properties of epoxy/HNTs nanocomposites in a way that those nanocomposites reinforced with longer and more uniform HNTs showed significantly higher impact strength.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design - Volume 68, 5 March 2015, Pages 42–53
نویسندگان
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