Nasim Abuali Galehdari – Seminar/Ph.D. Preliminary Defense, Friday, December 2, 2016 at 2:00 P.M.

JSNN – Nasim Abuali Galehdari – Ph.D. Preliminary Thesis Defense/Friday Seminar

Candidate: Nasim Abuali Galehdari

Advisor and Committee Chair: Ajit Kelkar, Ph.D.

Department: Nanoengineering

Date: Friday, December 2, 2016

Time: 2:00 P.M. – 4:00 P.M.

Location: JSNN Room 209

2907 E. Gate City Blvd., Greensboro, NC 27401

Title: “Fabrication, Characterization and Modeling of Radiation Shielding Multi-functional Sandwich Panels.”


Space Radiation has become one of the major factors in successful long duration space exploration. Exposure to space radiation not only can affect the health of astronauts but also can disrupt or damage materials and electronics. Hazards to materials include degradation of properties, such as, modulus, strength or glass transition temperature. Electronics may experience single event effects, gate rupture, burnout of field effect transistors and noise. Presently aluminum is the major component in most of the space structures due to its lightweight and good structural properties. However, aluminum is ineffective at blocking space radiation. Therefore, most of the past research involved studying at polymers which contain large amounts of hydrogen. Again, these materials are not structural materials and would require large amounts of material to achieve the structural properties needed. One of the materials to alleviate this problem is polymeric composite materials, which has good structural properties and use polymers that contained large amounts of hydrogen. This work presents an effective approach of  fabricating multi-functional hybrid sandwich panels that can provide beneficial radiation shielding and mechanical strength. Multi-functional hybrid sandwich panels were manufactured using specialized vacuum assisted resin transfer molding process and were subjected to radiation treatment. Study indicates that various nano-particles including Boron Nano powder, Boron Carbide and Gadolinium nano-particles can be successfully used to block the space radiation without sacrificing structural integrity.