Advisor: Dr. Douglas Gardner
Cellulose Nanofibrils-Reinforced Polypropylene Composites for Extrusion-based Additive Manufacturing
B.S. Wood Science and Engineering- Central South Forestry University, 2010
M.S. Bamboo Engineering- Nanjing Forestry University, 2013
Ph.D. Forest Resources- University of Maine, PRESENT
Bio & Research Interests
I come from Changzhou, Jiangsu, China. My bachelor’s degree is in Wood Science and Engineering from the Central South Forestry University and my master’s degree is in Bamboo Engineering from Nanjing Forestry University. After my graduate study, I became very interested in natural fiber reinforced plastic composites. In this area, the University of Maine and the Advanced Structures and Composites Center have a great reputation for their research and development across the world.
At the Advanced Structures and Composites Center, I have been working with Professor Douglas Gardner on my dissertation titled, “Cellulose Nanofibrils-Reinforced Polypropylene Composites for Extrusion-based Additive Manufacturing”. Additive manufacturing, or 3D printing, has developed drastically in the past few years. With that being said, not all materials are compatible with this technology. Moreover, the printed materials do not meet the strength requirements to be used directly as functional parts. My research goals are to identify a solution for printing polypropylene (a very common plastic, but experiences great difficulty in 3D printing) and to make printed polypropylene comparable to injection molded counterparts via fiber reinforcement.
Gardner, D. J., M. Blumentritt, L. Wang and N. Yildirim. 2015. Adhesion theories in wood adhesive bonding. In: Progress in Adhesion and Adhesives, K. L. Mittal, Ed. Scrivener Publishing, Beverly, MA, pp 125-168.
Wang L., Gramlich W.M., Gardner D.J. and Han Y. 2017. Cellulose Nanofibrils Reinforced Polypropylene Composites for Fused Filament Fabrication: nonisothermal crystallization kinetics and thermal expansion. Composites Part A. Submitted.
Wang L., Roach A.W., Gardner D.J. and Han Y. 2017. Mechanisms Contributing to Improved Mechanical Properties of Cellulose Nanofibrils Reinforced-Polypropylene Composites. Carbohydrate Polymers. Submitted.
Wang L. and Gardner D.J. 2017. Enhanced Cellulose Nanofibrils/Polypropylene Composites for 3D Printing. SPE Plastics Research Online. DOI 10.2417/spepro.006940
Wang L., Gardner D.J. and Bousfield D.W. 2017. Cellulose Nanofibril-Reinforced Polypropylene Composites for Material Extrusion: Rheological Properties. Polymer Engineering and Science. DOI 10.1002/pen.24615
Wang L., Gramlich W.M. and Gardner, D.J. 2017. Improving the Impact Strength of Polylactic acid (PLA) in Fused Layer Modeling (FLM). Polymer. 114: 242-248.
Wang L. and Gardner D.J. 2016. Contribution of Printing Parameters to the Bonding Quality of Polylactic acid (PLA) in Fused Layer Modeling. 3D Printed Materials and System. Accepted.
Wang L. and Gardner D.J. 2016. Effect of Fused Layer Modeling (FLM) Processing Parameters on Impact Strength of Cellular Polypropylene. Polymer.113: 74-80.
Wang L., Sanders J.E., Gardner D.J. and Han Yousoo. 2016. Effect of Fused Deposition Modeling Process Parameters on the Mechanical Properties of Polypropylene Printed Parts. Additive Manufacturing Journal. Submitted.
Wang L., Sanders J.E., Gardner D.J. and Han Yousoo. 2016. In-situ modification of cellulose nanofibrils by organosilanes during spray drying. Industrial Crops and Products, 95:129-135.
Gardner D.J., Han Y. and Wang L. 2015. Wood-plastic composite technology. Current Forestry Reports. DOI 10.1007/s40725-015-0016-6.
Gardner, D. J., M. Blumentritt, L. Wang and N. Yildirim. 2014. Adhesion theories in wood adhesive bonding: a critical review. Rev. Adhesion Adhesives 2(2):127-172. DOI: 10.7569/RAA.2014.097304
M Guan, C Yong, L Wang. Microscopic characterization of modified phenol-formaldehyde resin penetration of bamboo surfaces and its effect on some properties of two-ply bamboo bonding interface. BioResources 9(2), 1953-1963.
M Guan, L Wang, C Yong. 2014. Digital Image Correlation Measuring Shear Strain Distribution on Wood/Adhesive Interphase Modified by Sealants. Bioresources, 9(3), 5567-5576.
Guan MJ, Wang L, Chang X.M. Fluorescence tracking analysis of poplar and phenol-formaldehyde bonding interface. Journal of Nanjing Forestry University (Natural Sciences Edition), 2013, 37(5):125-128.
Guan MJ, Yong C, Wang L. Shear Strain and Microscopic Characterization of Bamboo Bonding Interface with Polyvinyl alcohol Modified Phenol- Formaldehyde Resin. Journal of Applied Polymer Science, 2013, 130(2): 1345-1350.
L Wang, MJ Guan, QS Zhang. 2012. Preliminary Research on Characteristics of Bamboo Briquette Charcoal as Solid Fuel. Key Engineering Materials, 517: 81-86.
- Wang, M.J. Guan. 2012. Influence of Veneers’ Lathe Checks on Strain Distribution at Wood-adhesive Interphase Measured by Electronic Speckle Pattern Interferometry (ESPI). 55th SWST International Convention. Beijing, China, August 27-31, 2012.
M.J. Guan, C. Yong, L. Wang. 2012. Selected Properties of Bamboo Scrimber Flooring Made of India Melocanna baccifera. 55th SWST International Convention. Beijing, China, August 27-31, 2012.
Wang L., Gramlich W.M., Gardner D.J. and Han Y. 2017. Cellulose Nanofibrils Enhanced Polypropylene Composites for Fused Filament Fabrication: nonisothermal crystallization kinetics and thermal expansion. International Conference on Nanotechnology for Renewable Materials, June 5-8, Montreal, Canada.
Memberships, Honors, Awards
Member, Technical Association of Paper and Pulp Industry, (TAPPI) 2017-PRESENT
Member, Society of Plastics Engineers, 2016-2017
University of Maine
- Lee & Sunny Allen International Experience Travel Scholarship Recipient, 2017
- Blumenstock Family Forest Products Graduate Student of the Year Award, 2015
- George L. Houston Scholarship Recipient, 2014
Nanjing Forestry University
- First Place, Graduate Scholarship Recipient, 2011-2012
Central South Forestry University
- Enterprise Scholarship Recipient,
- China Flooring Holding Company Limited. Hong Kong, 2010
- Excellent Volunteer, 50th Anniversary of Central South Forestry University, 2008
- Annual Undergraduate Scholarship, 2006-2010
Society of Plastic Engineers
- Poster competition award. 10th SPE Polymer Nanocomposites Conference, 2016
- SPE Automotive Composites Conference & Exhibition (ACCE)
- Graduate Scholarship Award, 2016-2017
- Poster award, 9th SPE Polymer Nanocomposites Conference, 2014
American Society of Agricultural and Biological Engineers
- First place, poster competition award, Northeast Agriculture and Biological Engineering Conference (NABEC), 2016