Image  Department of Manufacturing & Industrial Engineering
 University of Peradeniya

Dr. W.A.R. Manamperi

Senior Lecturer


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Office Address:

Department of Manufacturing and Industrial Engineering,
Faculty of Engineering,
University of Peradeniya,
Sri Lanka.

Email: asangam@eng.pdn.ac.lk

Telephone: 081-2393959


Asanga Manamperi joined the Department of Manufacturing and Industrial Engineering as a senior lecturer in July 2018. He received his BSc Eng degree in 2003 and MSc Eng degree in 2006 from University of Moratuwa, Sri Lanka. He obtained his PhD from North Dakota State University, USA in 2010 and his research involved development and characterization of bio-based thermoplastics. He continued his research work as a post-doctoral research fellow until 2012 in the areas of biodiesel, epoxy resins, and plastics. In 2012, Asanga joined Ridley Incorporation (an Alltech company), USA as a research and technical consultant and worked till 2018 where he has contributed to several product inventions and process innovations. His teaching interests include Materials Engineering, Forming Processes, and Product Design and Development. His research interests include bio-based materials, additive manufacturing, and use of biopolymers in industrial applications.

Post-Doctoral Fellow – North Dakota State University - USA

PhD – North Dakota State University – USA

MSc – University of Moratuwa – Sri Lanka

BSc Eng. – University of Moratuwa – Sri Lanka

Certified Professional Project Manager (CPPM) (2016)

Six Sigma Certification (2014)

Chartered Institute of Management Accountants (CIMA -UK) – Managerial Level 1 (2000)

Frank Baine Graduate Scholarship (2009) – North Dakota State University, USA

Bio-based materials

Additive manufacturing

Use of biopolymers in industrial applications

1. Principal Investigator of the World Bank Research Grant (2019) (Rs. 40 million) for setting up a new polymer processing and characterization laboratory at the University of Peradeniya and carryout research related to bio-based polymers (under AHEAD DOR – Accelerating Higher Education Expansion and Development Operation – Development Oriented Research).Research Project Title: Development and Characterization of Cassava Starch-Based Thermoplastics for Engineering Applications.

2. Principal Investigator of the University of Peradeniya Research Grant (2019)Research Project Title: Improvement of Filament Properties and Inter-Layer Bonding Strength of Polylactic Acid/ Wood Fibre Composites in Extrusion-based Additive Manufacturing.

3. Co-PI of University of Peradeniya Research Grant (2018).Research Project Title: Promotion of Sustainable Livelihoods among Marginalized Communities through Product Innovation and Eco Design Principles.

1. Fernando, N.M.L., Amaraweera, A.P.S.M., Manamperi, W.A., Manipura, W.M.J.A.S.B., Gunathilake, C.A. (2019) Effects of CaCO3 and MgO nanoparticles on mechanical properties of cassava starch-based thermoplastics. Paper No. ICSECM2019-219. In Abstract Proceedings of the 10th International Conference on Structural Engineering and Construction Management 2019, Kandy, Sri Lanka.

2. Manamperi, W.A., Amaraweera, A.P.S.M., Gunathilake, C.A., Fernando, N.M.L., Gamage, A., Manipura, A. (2019) Comparison of acid hydrolysis and microwave heating on the mechanical properties of cassava starch-based thermoplastics. Paper No. ICSECM2019-217. In Abstract Proceedings of the 10th International Conference on Structural Engineering and Construction Management 2019, Kandy, Sri Lanka.

3. Fernando, N.M.L., Manamperi, W.A., Manipura, W.M.J.A.S.B., Gunathilake, C.A. (2019) Recent developments in extrusion of bio-based thermoplastic materials. Paper No. iPURSE19ABS00170. In Proceedings of the Peradeniya University International Research Sessions, Sri Lanka, 22, p66.

4. Amaraweera, A.P.S.M., Manipura, W.M.J.A.S.B., Manamperi, W.A., Gunathilake, C.A. (2019). Fractionation methods of starch components (amylose and amylopectin) for industrial applications, a review. Paper No. iPURSE19ABS00164. In Proceedings of the Peradeniya University International Research Sessions, Sri Lanka, 22, p72.

1. Fu, C.J., Manamperi, W.A. , Dhuyvetter, D., (2016), Wax Impregnated Article and Method of Making, U.S. Patent# - 9,410,059

2. Pietig, J.L., Fu, C.J., Manamperi, W.A., Dhuyvetter, D., (2018), Suspendable Feed Block System for Animals and Method of Making Same, Docket No. 2018-Pat-0010 (7015-045) (pending)

Book Chapters

Manamperi, W.A., Jayawardhana, L.C., De Alwis, A., Pilapitiya, S. (2005). Development of an Expert System for Landfilling Applications in Sri Lanka. In Artificial Intelligence Applications and Innovations II, Volume 187 of the series IFIP - The International Federation for Information Processing (643-653). Location: Springer.

International Peer Reviewed Journals

1. Manamperi, W.A., Espinoza-Perez, J.D., Haagenson, D.M., Ulven, C.A., Wiesenborn, D. P., and Pryor, S. (2015). Influence of oil extraction method on properties of canola biodiesel, epoxies, and protein-based plastics. Industrial Crops and Products, 77, 133-138

2. Manamperi, W.A., Chang, S., Wiesenborn, D. P., and Pryor, S. (2012). Impact of meal preparation method and extraction procedure on canola protein yield and properties. Biological Engineering Transactions, 5 (4), 191-200.

3. Manamperi, W.A., Wiesenborn, D., Chang, S., and Pryor, S. (2011). Effects of protein separation conditions on the functional and thermal properties of canola protein isolates. Journal of Food Science, 76 (3), E266-E273.

4. Manamperi, W.A. and Pryor, S. (2011). Properties of canola protein-based plastics and protein isolates modified using SDS and SDBS. Journal of the American Oil Chemists’ Society, 89 (3), 541.

5. Manamperi, W.A., Chang, S,, Ulven, C., and Pryor, S. (2010). Plastics from an improved canola protein isolate: Preparation and properties. Journal of the American Oil Chemists’ Society, 87 (8), 909-915.

6. Manamperi, W.A., Fuqua, M., C.A. Ulven., Wiesenborn, D., and Pryor, S. (2011). Effect of canola protein extraction parameters on protein-based plastic properties. Journal of Biobased Materials and Bioenergy, 5 (4), 500-506.


Conference papers

1. Fernando, N.M.L., Amaraweera, A.P.S.M., Manamperi, W.A., Manipura, W.M.J.A.S.B., Gunathilake, C.A. (2019) Effects of CaCO3 and MgO nanoparticles on mechanical properties of cassava starch-based thermoplastics. Paper No. ICSECM2019-219. In Abstract Proceedings of the 10th International Conference on Structural Engineering and Construction Management 2019, Kandy, Sri Lanka.

2. Manamperi, W.A., Amaraweera, A.P.S.M., Gunathilake, C.A., Fernando, N.M.L., Gamage, A., Manipura, A. (2019) Comparison of acid hydrolysis and microwave heating on the mechanical properties of cassava starch-based thermoplastics. Paper No. ICSECM2019-217. In Abstract Proceedings of the 10th International Conference on Structural Engineering and Construction Management 2019, Kandy, Sri Lanka.

3. Fernando, N.M.L., Manamperi, W.A., Manipura, W.M.J.A.S.B., Gunathilake, C.A. (2019) Recent developments in extrusion of bio-based thermoplastic materials. Paper No. iPURSE19ABS00170. In Proceedings of the Peradeniya University International Research Sessions, Sri Lanka, 22, p66.

4. Amaraweera, A.P.S.M., Manipura, W.M.J.A.S.B., Manamperi, W.A., Gunathilake, C.A. (2019). Fractionation methods of starch components (amylose and amylopectin) for industrial applications, a review. Paper No. iPURSE19ABS00164. In Proceedings of the Peradeniya University International Research Sessions, Sri Lanka, 22, p72.

5. Manamperi, W.A., Sehrawat, J., Fuqua, M., Ulven, C., and Pryor, S. (2009). Influence of plasticizers on properties of polymers made from canola protein polyester blends. Paper No. 09-6327, ASABE International Meeting. Reno, NV.

6. Manamperi, W.A., Chang, K.C., and Pryor, S. (2007). Separation and evaluation of canola meal and protein for industrial bioproducts. Paper No. 07116, CSBE/ASABE North Central Intersectional Conference, Fargo, ND.

7. Manamperi, W.A., Chang, K.C., and Pryor, S. (2008). Thermal and functional properties of canola meal proteins precipitated at different pH values. Paper No. RRV08-803, CSBE/ASABE North Central Intersectional Conference, Winnipeg, Canada.

8. Manamperi, W.A., Chang, K.C., Wiesenborn, D. P., and Pryor, S. (2008). Alteration of Osborn sequence extraction for isolation of canola proteins. Paper No. 083924, ASABE International Meeting, Providence, Rhode Island.

9. Manamperi, W.A., Fuqua, M., Ulven, C., and Pryor, S. (2008). Preparation of plastic specimens from canola meal protein isolate. Paper No. RRV08-P02, CSBE/ASABE North Central Intersectional Conference, Winnipeg, Canada.

10. Manamperi, W.A., Wiesenborn, D.P., and Pryor, S.W. (2007). Canola meal protein fractionation and utilization for industrial applications. Paper 077036, 2007 ASABE International Meeting, Minneapolis, MN.

11. Sehrawat, J., Manamperi, W.A., and Pryor, S.W. (2010). Preparation of plastics from acetylated canola proteins. Paper No. 1009224, ASABE International Meeting. Pittsburgh, PA.

12. Manamperi, W.A., Jayawardhana, L.C., De Alwis, A., Pilapitiya, S. (2005). Usefulness of BestFill expert system: a case study of three landfill sites in Sri Lanka, R05 International Conference, Beijing, China.

13. Invited presentation at the 100th AOCS International Annual Meeting and Expo, Orlando, Florida, USA. Manamperi, W.A., Pryor, S.W. (2009). Canola proteins in biocomposites: Protein characterization and product formulation.