**المرتبة العلمية: طالب دكتوراه مبتعث حاليا في جامعة كيرتن, غرب استراليا

**التخصص: نانوتيكنولوجي فيزياء


**الدرجات العلمية :

- بكالوريوس (فيزياء) قسم الفيزياء - جامعة أم القرى- مكة المكرمة
- ماجستير (فيزياء) قسم الفيزياء - جامعة ولاية اوكلاهوما- الولايات المتحدة الأمريكية 2005م
 

**الخبرات العملية والإدارية :

- معيد في قسم الفيزياء , كلية المعلمين , مكة المكرمة
- رئيس شعبة الفيزياء , كلية المعلمين , مكة المكرمة 2001-2002 م
- مشرف على اختبارات القبول لقسم العلوم, كلية المعلمين, مكة المكرمة 2001-2002 م
- مبتعث لنيل درجة الماجستير في الفيزياء بجامعة ولاية أوكلاهوما , الولايات المتحدة الأمريكية 2002-2005م
- رئيس القسم الرياضي في النادي السعودي بولاية أوكلاهوما , الولايات المتحدة الأمريكية 2002-2003م
- مدير الشؤون المالية في النادي السعودي بولاية أوكلاهوما , الولايات المتحدة الأمريكية 2003-2005م
- محاضر في قسم الفيزياء, جامعة أم القرى , مكة المكرمة 2007م
- مبتعث حاليا لنيل درجة الدكتوراه في تقنية النانو , جامعة كيرتن , أستراليا

- مؤسس المركز السعودي لتقنية النانو

**الشهادات والدورات العلمية :

-  شهادة خبرة في استخدام المجهر الالكتروني الماسح SEM من جامعة غرب استراليا
- شهادة خبرة في استخدام المجهر الالكتروني النافذ TEM من جامعة غرب استراليا
- شهادة خبرة في طرق الكشف عن العناصر باستخدام أشعة- XRD  من جامعة كيرتن للتكنولوجيا
- دورة في البرمجة العصبية من معهد سوان تيف للتدريب العالي بمدينه بيرث
- دورة في فن إدارة المجموعات البحثية نحو تحقيق الهدف من معهد سوان تيف للتدريب العالي بمدينه بيرث
 

** الانجازات العلمية

 **مؤسس المركز السعودي لتقنية النانو Saudi Center of Nanotechnology

- المشاركة في تأليف كتاب بعنوان المركبات الخضراء "Green Composites" تم النشر

Book Chapter

H.Alamri, A. Alhuthali and I.M. Low, Mechanical Properties and Moisture Absorption Behavior of Cellulose-Fibre Reinforced Polymer Composites, Submitted Chapter for a book entitled “Green Composites: Properties, Design and Life Cycle Assessment. “Edited by F.Columbus, Nova Science Publishers, New York.

Abstract: Epoxy and vinyl polyester matrix composites reinforced with cellulose fibre were fabricated and characterized with respect to their flexural, fracture and impact properties. Reinforcement of the polymer by cellulose fibers resulted in a significant increase in the strain at failure, fracture toughness and impact toughness but only a moderate increase in flexural strength and flexural modulus. Moisture absorption of composites in water was analyzed. The kinetics of sorption-diffusion process was investigated and typical kinetic parameters D, k, and M were determined. The use of Nano-clay in the composites was effective in imparting a substantial reduction in water permeability due to the tortuous path presented by high aspect ratio clay. Diffusion models for water uptake behavior in polymer composites are reviewed. The effect of accelerated exposure to seawater on the flexural and impact properties of composites was also investigated. The salient toughness mechanisms and crack-tip failure processes were identified and discussed in light of observed microstructures.

**H. Alamri and I.M. Low, 2010 “Characterization and Properties of Recycled Cellulose Fibre- Reinforced Epoxy-Hybrid Clay Nanocomposites” Materials Science Forum Vols. 654-656, pp 2624-2627

Abstract. In this paper, epoxy eco-composites reinforced with recycled cellulose fiber (RCF) and nano-fillers such as nano-clay platelets (30B) and halloysite nanotubes (HNTs), have been fabricated and investigated. The influences of RCF/nano-filler dispersion on the microstructure, physical and mechanical characteristics have been characterized. Results indicate that flexural strength decreased for the majority of study samples due to the poor dispersion of nano-fillers and the existence of voids within the samples. In contrast, impact toughness and fracture toughness were improved for all reinforced samples. The effect of water absorption was positive in terms of enhancing the impact toughness of the composites. Addition of nanoclay was found to increase the porosities of all nanocomposites.

**H. Alamri and I.M. Low, 2010 “Mechanical and fracture properties of nano-filler-cellulose fibre-reinforced epoxy nanocomposites”  in press, for presentation in 6th Australasian Congress on Applied Mechanics December 12th-15th 2010, Perth, Australia.

Abstract: Natural fibre reinforced composites have attracted the attention of researchers because of their desirable properties in terms of toughness, high modulus, low density, recyclability and renewability.  In fact, the use of natural fibres in polymer composites has the potential to produce materials with higher specific strength and specific modulus due of their low density. Likewise, polymer composites reinforced with nano-filler have been widely investigated for their unique and significant improvement in strength, modulus, impact strength, barrier properties, heat resistance and thermal stability. In this paper, epoxy eco-composites reinforced with recycled cellulose fibres (RCF) and nano-fillers such as nano-clay platelets (30B), halloysite nanotubes (HNTs) and nano-silicon carbide (SiC), have been fabricated and investigated. The influences of RCF/nano-filler dispersion on the mechanical and fracture properties of these composites have been characterized in terms of flexural strength, flexural modulus, fracture toughness and impact-fracture. It was found that the presence of RCF resulted in significant increase in fracture toughness, impact strength, impact toughness and flexural modulus but moderate increase in flexural strength. However, the influence of nano-filler on flexural strengths was found to be modest or insignificant which could be due to the poor dispersion of nano-fillers and the existence of voids within the samples. Addition of RCF was found to increase the porosities of all composites.

** H. Alamri, A. Alhuthali and I.M. Low, 2009 "The Effect of Water Absorption on the Physical, Flammability and Mechanical Properties of Polymer Eco-Nanocomposites", Int. J. Mol. Sci., Volume 10, in press

Abstract: When compared to their synthetic counterparts, natural fibres represent an environmentally friendly alternative by virtue of several attractive attributes that include lower density, lower cost, non-toxicity, ease of processing, renewability and recyclability. In addition, the use of natural fibres in polymer matrix composites has the potential to produce materials with higher specific strength and specific modulus due of their low density. In this paper, epoxy and vinyl-ester resin matrix composites reinforced with recycled cellulose fibre (RCF) have been fabricated via direct mechanical mixing and soaking methods. Nano-composites from both polymers reinforced with different concentration (1%, 5% and 10%) of nanoclay particles, nano-clay platelets (30B) and halloysite nano-tubes (HNTs), have been synthesized. The mechanical properties, such as flexural strength, impact toughness, fracture toughness and effect of water absorption on impact toughness were evaluated. Porosity and flammability properties have been investigated. Results indicated that flexural strength decreased for the majority of study samples due to the poor dispersion of nanofilers and the existence of voids within the samples. In contrast, impact toughness and fracture toughness found to be improved for all reinforced samples. The effect of water absorption was positive in term of enhancing the impact toughness of the composites. Addition of nanoclay found to increase the porosities and to improve of the flammability of all nanocomposites. Effect of RCF and nanoclay particles addition have been discussed

Conferences

·         A. Alhuthali, H. Alamri and I.M. Low, Physical and mechanical properties of cellulose fibre reinforced polymer composites. Presented in the 1st Int. Conf. on Recycling and Reuse of Materials and their Products (ICRM-2009): july17-19, 2009, Kottayam.

·          H. Alamri and I.M. Low, Physical and Mechanical Characteristics of Nano-Clay–Cellulose Fibre- Reinforced Epoxy Nanocomposites. Presented as a poster at 16th AINSE Conference on Nuclear and Complementary Techniques of Analysis (NCTA): November, 25-27, 2009, Sydney, Australia

·         H. Aamri and I.M. Low, Characterization and Properties of Recycled Cellulose Fibre- Reinforced Epoxy-Hybrid Clay Nanocomposites. Invited Abstract accepted for presentation at The 7th Pacific Rim International Conference on Advanced Materials and Processing (PRICM 7): August, 1-8, 2010, cairns, Australia.

·          Submitted an abstract of papers for the Seven-Australian Conference on Composites Materials (ACCM-7) November 15 - 18, 2010 Taipei, Taiwan

·          H. Alamri and I.M. Low, 2010 “Mechanical and fracture properties of nano-filler-cellulose fibre-reinforced epoxy nanocomposites”  in press, for presentation in 6th Australasian Congress on Applied Mechanics December 12th-15th 2010, Perth, Australia.

** الخبرات العلميه والتقنية

خبرة في تشغيل واستخدام الاجهزة التقنية التالية

Scanning Electron Microscopy (SEM)

Atomic Force Microscopy (AFM)

X-Ray Diffraction (XRD)

Transmission Electron Microscopy (TEM)

Differential and Thermo-gravimetric Analysis (DTA/TGA)

Charpy Impact Tester

Universal Testing Machine (Three-point Tester)

Zwick Microhardness and Rockwall Hardness Testers

**الأهتمامات العلمية والبحثية والشخصية

- تطوير و تقوية مواد بوليمرية باستخدام مواد النانو والألياف الطبيعية
- دراسة الخصائص الفيزيائية لجسيمات النانو
- استخدام مواد النانو في تقليل امتصاص المواد للماء

- تطوير خصائص الطلاء بإستخدام مواد النانو + البوليمير
- المخاطر المتوقعة من التعامل مع مواد النانو
- توطين مجالات تقنية النانو في المملكة العربية السعودية
- الاستفادة من الخبرات العالمية في مجال تقنية النانو
- التعليم الالكتروني للمناهج الدراسية
- محو الأمية الالكترونية لكافة طبقات المجتمع
- الأساليب الحديثة في طرق التدريس

** العضويات العلمية

- عضو في مركز ابحاث المواد بجامعة كيرتن للتكنولوجيا Curtin Materials Research Center) )

- عضو في معهد غرب استراليا لأبحاث النانو كيمياء

- عضو في مركز ابحاث المواد المتناهية الضغر جامعه غرب استراليا

(Western Australian Nanotechnology Research Institute (