Grafting Lignin with Bioderived Polyacrylates for Low-Cost, Ductile, and Fully Biobased Poly(lactic acid) Composite
Article
Article Title | Grafting Lignin with Bioderived Polyacrylates for Low-Cost, Ductile, and Fully Biobased Poly(lactic acid) Composite |
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ERA Journal ID | 200101 |
Article Category | Article |
Authors | Sun, Yiqi (Author), Ma, Zhewen (Author), Xu, Xiaodong (Author), Liu, Xiaohuan (Author), Liu, Lina (Author), Huang, Guobo (Author), Liu, Lei (Author), Wang, Hao (Author) and Song, Pingan (Author) |
Journal Title | ACS Sustainable Chemistry and Engineering |
Journal Citation | 8 (5), pp. 2267-2276 |
Number of Pages | 10 |
Year | 2020 |
Publisher | American Chemical Society |
Place of Publication | United States |
ISSN | 2168-0485 |
Digital Object Identifier (DOI) | https://doi.org/10.1021/acssuschemeng.9b06593 |
Web Address (URL) | https://pubs.acs.org/doi/10.1021/acssuschemeng.9b06593 |
Abstract | It has been always attractive to design low-cost, ductile, and fully biobased polylactic acid (PLA) composites based on industrial waste lignin for promoting its practical applications in the industry. Unfortunately, existing material strategies often lead to poor processability and low ductility because of weak interfaces between lignin and PLA. Herein, we report a fully biobased functionalized lignin (Lig-g-P(LMA-co-THFMA, or Mlignin) by chemically grafting two bioderived monomers, lauryl methacrylate (LMA), and tetrahydrofurfuryl methacrylate (THFMA) via free-radical polymerization. Mlignin exhibits moderately lower melt viscosity and improved formability with PLA as compared with pristine lignin due to better interfacial combability. Because of improved interfacial adhesion, Mlignin is capable of uniformly dispersing within the PLA matrix in a submicron phase size, leading to a “sea-island” structure. As a result, the addition of 20 wt % Mlignin increases the ductility by 16 folds (from 12 to 204%) and the toughness by ∼11 folds from 4.4 to 54.6 MJ m–3 relative to the PLA matrix. Meanwhile, the PLA/20% Mlignin composite retains a tensile strength of 40.9 MPa. Such largely enhanced ductility and toughness of PLA is mainly attributed to the deformation of Mlignin that can dissipate the fracture energy during the tension process. This work not only offers a simple route to converting industrial waste lignin into value-added biobased fillers for polymers and but also provides a new approach for developing low-cost, ductile, and fully sustainable PLA to further its industrial applications. |
Keywords | poly(lactic acid); lignin; chemical graft; toughness; ductility |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401605. Functional materials |
401609. Polymers and plastics | |
401602. Composite and hybrid materials | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Zhejiang A & F University, China |
Taizhou University, China | |
Centre for Future Materials | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q627v/grafting-lignin-with-bioderived-polyacrylates-for-low-cost-ductile-and-fully-biobased-poly-lactic-acid-composite
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