Interfacial engineering of polypropylene/graphene nanocomposites: improvement of graphene dispersion by using tryptophan as a stabilizer
Identifieur interne : 000415 ( Main/Exploration ); précédent : 000414; suivant : 000416Interfacial engineering of polypropylene/graphene nanocomposites: improvement of graphene dispersion by using tryptophan as a stabilizer
Auteurs : Feng You [République populaire de Chine] ; Dongrui Wang [République populaire de Chine] ; Xinxin Li [République populaire de Chine] ; Meijing Liu [République populaire de Chine] ; Guo-Hua Hu [France] ; Zhi-Min Dang [République populaire de Chine]Source :
- RSC Advances [ 2046-2069 ] ; 2014.
Abstract
In this work, graphene nanosheets functionalized with polypropylene (PP) chains through non-covalent pi-pi interactions, PP-f-graphene, were prepared and their reinforcing effect on PP was investigated. With the aid of tryptophan, graphene can stably disperse in water due to the non-covalent pi-pi interactions between graphene and tryptophan. By mixing the aqueous dispersion of tryptophan-functionalized graphene and the xylene solution of polypropylene-graft-maleic anhydride (MAPP), a binary phase system was obtained. The graphene nanosheets continuously transferred from water phase into xylene phase as the reaction between MAPP and tryptophan at the water/oil interface proceeded. The structure of the resultant PP-f-graphene nanosheets was carefully characterized by spectroscopy and microscopy methods. The results confirmed that MAPP chains have been successfully bonded onto graphene surfaces. PP/PP-f-graphene nanocomposites were fabricated by melt blending. A well-dispersed PP-f-graphene in PP matrix was realized due to the strong adsorption between graphene and functionalized PP. The addition of only 0.6 wt% of PP-f-graphene increased the tensile strength and flexural modulus of PP by 20.8% and 44.6%, respectively. The crystallization temperature and rate of PP were also elevated by the incorporation of PP-f-graphene. Making use of the interaction between graphene and functionalized PP is a facile method to improve the dispersion of graphene in the PP matrix.
Url:
DOI: 10.1039/c3ra47112h
Affiliations:
- France, République populaire de Chine
- Grand Est, Lorraine (région)
- Metz, Nancy
- Centre national de la recherche scientifique, Laboratoire réactions et génie des procédés, Université de Lorraine
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R.China</addrLine><country key="CN"></country></address><ref type="url">http://en.ustb.edu.cn/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>République populaire de Chine</country></affiliation></author></analytic><idno type="DOI">10.1039/c3ra47112h</idno><series><title level="j">RSC Advances</title><idno type="ISSN">2046-2069</idno><imprint><date type="datePub">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In this work, graphene nanosheets functionalized with polypropylene (PP) chains through non-covalent pi-pi interactions, PP-f-graphene, were prepared and their reinforcing effect on PP was investigated. With the aid of tryptophan, graphene can stably disperse in water due to the non-covalent pi-pi interactions between graphene and tryptophan. By mixing the aqueous dispersion of tryptophan-functionalized graphene and the xylene solution of polypropylene-graft-maleic anhydride (MAPP), a binary phase system was obtained. The graphene nanosheets continuously transferred from water phase into xylene phase as the reaction between MAPP and tryptophan at the water/oil interface proceeded. The structure of the resultant PP-f-graphene nanosheets was carefully characterized by spectroscopy and microscopy methods. The results confirmed that MAPP chains have been successfully bonded onto graphene surfaces. PP/PP-f-graphene nanocomposites were fabricated by melt blending. A well-dispersed PP-f-graphene in PP matrix was realized due to the strong adsorption between graphene and functionalized PP. The addition of only 0.6 wt% of PP-f-graphene increased the tensile strength and flexural modulus of PP by 20.8% and 44.6%, respectively. The crystallization temperature and rate of PP were also elevated by the incorporation of PP-f-graphene. Making use of the interaction between graphene and functionalized PP is a facile method to improve the dispersion of graphene in the PP matrix.</div></front></TEI><affiliations><list><country><li>France</li><li>République populaire de Chine</li></country><region><li>Grand Est</li><li>Lorraine (région)</li></region><settlement><li>Metz</li><li>Nancy</li></settlement><orgName><li>Centre national de la recherche scientifique</li><li>Laboratoire réactions et génie des procédés</li><li>Université de Lorraine</li></orgName></list><tree><country name="République populaire de Chine"><noRegion><name sortKey="You, Feng" sort="You, Feng" uniqKey="You F" first="Feng" last="You">Feng You</name></noRegion><name sortKey="Dang, Zhi Min" sort="Dang, Zhi Min" uniqKey="Dang Z" first="Zhi-Min" last="Dang">Zhi-Min Dang</name><name sortKey="Li, Xinxin" sort="Li, Xinxin" uniqKey="Li X" first="Xinxin" last="Li">Xinxin Li</name><name sortKey="Liu, Meijing" sort="Liu, Meijing" uniqKey="Liu M" first="Meijing" last="Liu">Meijing Liu</name><name sortKey="Wang, Dongrui" sort="Wang, Dongrui" uniqKey="Wang D" first="Dongrui" last="Wang">Dongrui Wang</name></country><country name="France"><region name="Grand Est"><name sortKey="Hu, Guo Hua" sort="Hu, Guo Hua" uniqKey="Hu G" first="Guo-Hua" last="Hu">Guo-Hua Hu</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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