Study of mechanical and physical properties of carbon nanotubes (CNTS)‎ composite material for applications in chemical reactor material

مقدم أطروحة جامعية

Hasan, Hamid Hasan

مشرف أطروحة جامعية

Abd al-Razzaq, Adnan A.
Muhammad, Muhammad I.

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم الهندسة الكيمياوية

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2012

الملخص الإنجليزي

In the present work, CNTs as reinforcement were synthesized by catalytic chemical vapor deposition (CCVD) method at 700 oC for 60 minutes, using acetylene gas as a carbon source, argon gas as carrier and two types of substrates (stainless steel mesh and particles of nickel over granules of alumina), the influence of nickel concentrations (2, 5, 7 and 10 wt.%) on alumina support is studied.

The prepared of CNTs characterized by scanning electron microscopy (SEM) and specific surface area measurement.

The results show that the average diameter and the specific surface area of CNTs increased and decreased respectively with increasing the concentration of catalysts.

Epoxy based polymer composites were prepared by dispersing some samples of CNTs produced, carbon black (CB) as reinforcement in different weight percentages (0.1, 0.3, 0.5 and 0.7 wt.%).

The effects of fillers morphologies on some mechanical, thermal, electrical and diffusion properties of the composites were investigated.

The mechanical properties in terms of impact strength, tensile strength, elongation at break, hardness, compression strength, flexural strength and Young’s modulus were enhanced by addition of high aspect ratio fillers at low weight percentage (0.1 wt.%) whereas the composite strength decreased by addition fillers at high weight percentage (0.7 wt.%).

The results also show the most mechanical properties of composite drastically decrease by addition of CB fillers.

The thermal properties in term of glass transition temperature (Tg) and coefficient of thermal conductivity (k) are increased with increasing the concentration of fillers, and the large improvement in composites containing high aspect ratio CNTs.

The electrical properties in term of coefficient of electrical conductivity (σ) were improved by 4 orders after addition of high aspect ratio CNTs.

The diffusion properties in terms of equilibrium moisture content (Mm) and diffusion coefficient (D) are significantly affected by addition of CNTs fillers after being immersed in distilled water, acid and alkali solution.

التخصصات الرئيسية

العلوم الهندسية والتكنولوجية (متداخلة التخصصات)

الموضوعات

• الخواص الميكانيكية
• المفاعلات الكيميائية

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-419971