Lab of Dr. Claudiu T. Lungu

Research

Current Research Areas

 

Photo-Thermal Desorption of VOC from Carbon Nanotubes Provide the foundation for a new thermal desorption technique utilizing the photothermal effect of carbonatious sorbent matrices.  Study of the photothermal effect of light absorption in various Single Walled Carbon Nanotube (SWNT) matrices and a representative Activated Carbon (AC).  Establish a relationship between irradiation power and temperature rise using a pulsed light source (xenon flash lamp or laser).  Establish a relationship between irradiation power and organic vapor desorption efficiency.  Comparison of SWNT results to commercially purchased AC.

 

Use of 3D Technology for Facepiece Design based on the New NIOSH Respirator Headforms . A novel combination of surface laser scanning, numerical geometry methods and rapid prototyping techniques will be used to design and prototype the five new head forms and half face respirators to accommodate each size recommended by NIOSH. The prototyped head forms will undergo quantitative fit testing with both existing, commercially available face piece designs and novel designs adapted to the head forms. We hypothesize, first, that certain existing, commercially available respirator designs will provide better protection than others for the new fit panel headforms. Secondly, we hypothesize that facepieces designed for the new NIOSH head form sizes will exhibit lower rates of faceseal leakage than existing designs for both the headforms and human subjects in a pilot study.

 

Development of Novel Composite Adsorbent Materials for Respirators and Environmental Engineering Applications We are exploring various means to obtain materials that could adsorb efficiently various organic vapors and gases. Based on the current state of knowledge and our preliminary studies, we hypothesize that: Surface modification of ACF via chemical impregnation, metallic salt impregnation and metal deposition will change the physico-chemical properties of the fibers’ surface resulting in better removal performance of organic vapors and reactive gases. We are also exploring the use of carbonized natural fibers such as hemp, flax and banana lives to obtain adsorbent materials that could be used in the removal of volatile contaminants at various contaminated sites.