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Surface Charges Con...
Surface Charges Control the Structure and Properties of Layered Nanocomposite of Cellulose Nanofibrils and Clay Platelets
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- Xu, Dingfeng (författare)
- KTH,Organisk kemi,Glykovetenskap,Sch Engn Sci Chem Biotechnol & Hlth, AlbaNova Univ Ctr, Dept Chem,Div Glycosci, SE-10691 Stockholm, Sweden.
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- Wang, Shennan, MS, 1992- (författare)
- KTH,Glykovetenskap,Sch Engn Sci Chem Biotechnol & Hlth, AlbaNova Univ Ctr, Dept Chem,Div Glycosci, SE-10691 Stockholm, Sweden.
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- Berglund, Lars, 1956- (författare)
- KTH,Biokompositer,Wallenberg Wood Science Center,Wallenberg Wood Sci Ctr, Dept Fibre & Polymer Technol, SE-10044 Stockholm, Sweden.
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- Zhou, Qi (författare)
- KTH,Sch Engn Sci Chem Biotechnol & Hlth, AlbaNova Univ Ctr, Dept Chem,Div Glycosci, SE-10691 Stockholm, Sweden.;KTH Royal Inst Technol, Wallenberg Wood Sci Ctr, Dept Fibre & Polymer Technol, SE-10044 Stockholm, Sweden.
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(creator_code:org_t)
- 2021-01-11
- 2021
- Engelska.
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Ingår i: ACS Applied Materials and Interfaces. - : AMER CHEMICAL SOC. - 1944-8244 .- 1944-8252. ; 13:3, s. 4463-4472
- Relaterad länk:
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https://doi.org/10.1...
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https://pubs.acs.org...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The interfacial bonding and structure at the nanoscale in the polymer-clay nanocomposites are essential for obtaining desirable material and structure properties. Layered nanocomposite films of cellulose nanofibrils (CNFs)/montmorillonite (MTM) were prepared from the water suspensions of either CNFs bearing quaternary ammonium cations (Q-CNF) or CNFs bearing carboxylate groups (TO-CNF) with MTM nanoplatelets carrying net surface negative charges by using vacuum filtration followed by compressive drying. The effect of the ionic interaction between cationic or anionic charged CNFs and MTM nanoplatelets on the structure, mechanical properties, and flame retardant performance of the TO-CNF/MTM and Q-CNF/MTM nanocomposite films were studied and compared. The MTM nanoplatelets were well dispersed in the network of TO-CNFs in the form of nanoscale tactoids with the MTM content in the range of 5-70 wt %, while an intercalated structure was observed in the Q-CNF/MTM nanocomposites. The resulting TO-CNF/MTM nanocomposite films had a better flame retardant performance as compared to the QCNF/MTM films with the same MTM content. In addition, the effective modulus of MTM for the TO-CNF/MTM nanocomposites was as high as 129.9 GPa, 3.5 times higher than that for Q-CNF/MTM (37.1 GPa). On the other hand, the Q-CNF/MTM nanocomposites showed a synergistic enhancement in the modulus and tensile strength together with strain-to-failure and demonstrated a much better toughness as compared to the TO-CNF/MTM nanocomposites.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Polymerteknologi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Polymer Technologies (hsv//eng)
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
Nyckelord
- cellulose nanofibrils
- montmorillonite platelets
- surface charges
- nanocomposites
- mechanical properties
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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