Tags

Type your tag names separated by a space and hit enter

Improved mechanical properties of polylactide nanocomposites-reinforced with cellulose nanofibrils through interfacial engineering via amine-functionalization.
Carbohydr Polym. 2015 Oct 20; 131:208-17.CP

Abstract

One of the main factors responsible for the mechanical and physical properties of nanocomposites is the effectiveness of the interfacial region to transfer loads and mechanical vibrations between the nano-reinforcements and the matrix. Surface functionalization has been the preferred approach to engineer the interfaces in polymer nanocomposites in order to maximize their potential in structural and functional applications. In this study, amine-functionalized cellulose nanofibrils (mCNF-G1) were synthesized via silylation of the hydroxyl groups on the CNF surface using 3-aminopropyltrimethoxysilane (APTMS). To further increase the amine density (mCNF-G2), dendritic polyamidoamine (PAMAM) was grafted onto mCNF-G1 by the Michael addition of methacrylate onto mCNF-G1, followed by the transamidation of the ester groups of methacrylate using ethylenediamine. Compared to native CNF-reinforced, poly(l-lactide) (PLLA) nanocomposites, amine-functionalized CNF exhibited significantly improved dispersion and interfacial properties within the PLLA matrix due to the grafting of PLLA chains via aminolysis. It is also a more effective nucleating agent, with 15% mCNF-G1 leading to a crystallinity of 32.5%, compared to 0.1 and 8.7% for neat PLLA and native CNF-reinforced composites. We have demonstrated that APTMS-functionalized CNF (mCNF-G1) significantly improved the tensile strength compared to native CNF, with 10% mCNF-G1 being the most effective (i.e., >100% increase in tensile strength). However, we also found that excessive amines on the CNF surface (i.e., mCNF-G2) resulted in decreased tensile strength and modulus due to PLLA degradation via aminolysis. These results demonstrate the potential of optimized amine-functionalized CNF for future renewable material applications.

Links

Publisher Full Text (DOI)

Authors+Show Affiliations

Lu Y
Materials Science and Technology Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Knoxville, Oak Ridge, TN 37831, United States.
Cueva MC
Universidad San Francisco de Quito, Quito, Ecuador.
Lara-Curzio E
Materials Science and Technology Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Knoxville, Oak Ridge, TN 37831, United States.
Ozcan S
Materials Science and Technology Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Knoxville, Oak Ridge, TN 37831, United States. Electronic address: ozcans@ornl.gov.

MeSH

AminesCalorimetry, Differential ScanningCelluloseMechanical PhenomenaMicroscopy, Electron, ScanningMolecular WeightNanocompositesPhotoelectron SpectroscopyPolyestersSpectroscopy, Fourier Transform InfraredStress, MechanicalTemperatureTensile Strength

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

26256177

Citation

Lu, Yuan, et al. "Improved Mechanical Properties of Polylactide Nanocomposites-reinforced With Cellulose Nanofibrils Through Interfacial Engineering Via Amine-functionalization." Carbohydrate Polymers, vol. 131, 2015, pp. 208-17.
Lu Y, Cueva MC, Lara-Curzio E, et al. Improved mechanical properties of polylactide nanocomposites-reinforced with cellulose nanofibrils through interfacial engineering via amine-functionalization. Carbohydr Polym. 2015;131:208-17.
Lu, Y., Cueva, M. C., Lara-Curzio, E., & Ozcan, S. (2015). Improved mechanical properties of polylactide nanocomposites-reinforced with cellulose nanofibrils through interfacial engineering via amine-functionalization. Carbohydrate Polymers, 131, 208-17. https://doi.org/10.1016/j.carbpol.2015.05.047
Lu Y, et al. Improved Mechanical Properties of Polylactide Nanocomposites-reinforced With Cellulose Nanofibrils Through Interfacial Engineering Via Amine-functionalization. Carbohydr Polym. 2015 Oct 20;131:208-17. PubMed PMID: 26256177.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Improved mechanical properties of polylactide nanocomposites-reinforced with cellulose nanofibrils through interfacial engineering via amine-functionalization. AU - Lu,Yuan, AU - Cueva,Mario Calderón, AU - Lara-Curzio,Edgar, AU - Ozcan,Soydan, Y1 - 2015/06/01/ PY - 2015/01/22/received PY - 2015/05/20/revised PY - 2015/05/21/accepted PY - 2015/8/11/entrez PY - 2015/8/11/pubmed PY - 2016/6/9/medline KW - Aminolysis KW - Cellulose nanofibrils KW - PAMAM KW - Polylactide KW - Silylation SP - 208 EP - 17 JF - Carbohydrate polymers JO - Carbohydr Polym VL - 131 N2 - One of the main factors responsible for the mechanical and physical properties of nanocomposites is the effectiveness of the interfacial region to transfer loads and mechanical vibrations between the nano-reinforcements and the matrix. Surface functionalization has been the preferred approach to engineer the interfaces in polymer nanocomposites in order to maximize their potential in structural and functional applications. In this study, amine-functionalized cellulose nanofibrils (mCNF-G1) were synthesized via silylation of the hydroxyl groups on the CNF surface using 3-aminopropyltrimethoxysilane (APTMS). To further increase the amine density (mCNF-G2), dendritic polyamidoamine (PAMAM) was grafted onto mCNF-G1 by the Michael addition of methacrylate onto mCNF-G1, followed by the transamidation of the ester groups of methacrylate using ethylenediamine. Compared to native CNF-reinforced, poly(l-lactide) (PLLA) nanocomposites, amine-functionalized CNF exhibited significantly improved dispersion and interfacial properties within the PLLA matrix due to the grafting of PLLA chains via aminolysis. It is also a more effective nucleating agent, with 15% mCNF-G1 leading to a crystallinity of 32.5%, compared to 0.1 and 8.7% for neat PLLA and native CNF-reinforced composites. We have demonstrated that APTMS-functionalized CNF (mCNF-G1) significantly improved the tensile strength compared to native CNF, with 10% mCNF-G1 being the most effective (i.e., >100% increase in tensile strength). However, we also found that excessive amines on the CNF surface (i.e., mCNF-G2) resulted in decreased tensile strength and modulus due to PLLA degradation via aminolysis. These results demonstrate the potential of optimized amine-functionalized CNF for future renewable material applications. SN - 1879-1344 UR - https://www.unboundmedicine.com/medline/citation/26256177/Improved_mechanical_properties_of_polylactide_nanocomposites_reinforced_with_cellulose_nanofibrils_through_interfacial_engineering_via_amine_functionalization_ DB - PRIME DP - Unbound Medicine ER -