کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1401929 984727 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Micro- and nano-mechanical characterization of polyamide 11 and its composites containing cellulose nanofibers
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Micro- and nano-mechanical characterization of polyamide 11 and its composites containing cellulose nanofibers
چکیده انگلیسی


• Nanocomposites from polyamide 11 and 16/30 nm thick CNs prepared via melt compounding.
• Polyamide/CNs nanocomposites show good thermal stability and melt processing behavior.
• PFQNM–AFM method emphasized microstructure on different levels in polyamide 11.
• Microstructure revealed by PFQNM correlated with mechanical behavior of nanocomposites.

Nanocomposites from polyamide 11 and dried cellulose nanofibers (CNs), 16–30 nm in thickness and 50–400 nm in length, were prepared via direct melt mixing and their micro- and nano-mechanical properties were studied. (PF) QNM (Quantitative Nanomechanical Mapping) method was used to map nanomechanical properties at the surface of polyamide 11 and nanocomposites. This new AFM method emphasized both the increased modulus in nanocomposites as compared to the matrix and the microstructure on different levels in polyamide 11 and its nanocomposites. PF QNM showed that their crystalline structure consists of bundles of lamellar stacks, 200–350 nm in width and 20–40 nm wide lamellar stacks. Moreover, PF QNM study emphasized higher structural order in nanocomposites with 3 and 5 wt.% CNs and lower in the nanocomposite with 8 wt.% CNs as compared to the reference. These observations were verified and are consistent with both crystallinity values determined by DSC and micro-mechanical test results. The oriented bundles of lamellar stacks, observed by PF QNM, could be considered as the main blocks determining high mechanical properties for the studied nanomaterials.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Polymer Journal - Volume 49, Issue 12, December 2013, Pages 3857–3866
نویسندگان
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