Preparation of high-performance cellulose composite membranes from LiOH/urea solvent system

New green solvent system alkali (such as NaOH and LiOH)/urea which could rapidly dissolve cellulose could be potentially used to prepare high-performance regenerated cellulose materials with low cost. Pure regenerated cellulose materials have relatively low strength inherent effects. In this work, w...

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Autores principales:	Yinke Liu, Shuman Xu, Mengfan Jing, Yuan Wei, Hua Deng, Qiang Fu
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2019
Materias:	green solvent regenerated cellulose membrane cellulose nanofiber graphene oxide reinforcement Materials of engineering and construction. Mechanics of materials TA401-492 Polymers and polymer manufacture TP1080-1185
Acceso en línea:	https://doaj.org/article/48812d2198c645639aeae26dbc76e025
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spelling	oai:doaj.org-article:48812d2198c645639aeae26dbc76e0252021-12-02T08:07:37ZPreparation of high-performance cellulose composite membranes from LiOH/urea solvent system2055-033210.1080/20550324.2019.1619962https://doaj.org/article/48812d2198c645639aeae26dbc76e0252019-04-01T00:00:00Zhttp://dx.doi.org/10.1080/20550324.2019.1619962https://doaj.org/toc/2055-0332New green solvent system alkali (such as NaOH and LiOH)/urea which could rapidly dissolve cellulose could be potentially used to prepare high-performance regenerated cellulose materials with low cost. Pure regenerated cellulose materials have relatively low strength inherent effects. In this work, we choose TEMPO-oxide cellulose nanofiber (CNF) and graphene oxide (GO) as fillers to prepare isotropic regenerated cellulose membrane (RCM) with significantly enhanced mechanical properties. Dynamic mechanical analyzer (DMA) test shows that RCM with content of 5 wt% CNF has the maximum enhancement value of 32.5% improvement comparing with pure RCM. And RCM with 0.4 wt% GO has the maximum improvement of 17.9%. Mechanical properties decrease with further increasing filler contents. We employ transmission electron microscopy to confirm the structure of fillers in solution and scanning electron microscopy to observe the microstructures of these RCMs. The results are consistent with DMA tests. In addition, XRD results confirm that the crystal structure of RCMs is the same with RCMs without filler. Thermogravimetric analyses results indicate that RCMs keep great thermal stability below 300 °C. Transmittance (Tr) property is carried out by UV–Vis spectroscopy. Pure RCMs and CNF/RCMs keep high transparency at the wavelength of 800 nm. Transparency of RCMs with GO decrease quickly when the content of GO increases. In conclusion, the enhancement mechanism is proposed as the addition of fillers makes up the defects in RCMs. Furthermore, CNF illustrates large aspect ratio which is beneficial for stress transfer. As for GO, polar groups on surface provide strong interaction with the matrix. This is the first time that the enhancement effects of different fillers are systematically analyzed and compared for RCMs system. Our work could benefit the selection of appropriate fillers for such green solvent system and expand its range of applications.Yinke LiuShuman XuMengfan JingYuan WeiHua DengQiang FuTaylor & Francis Grouparticlegreen solventregenerated cellulose membranecellulose nanofibergraphene oxidereinforcementMaterials of engineering and construction. Mechanics of materialsTA401-492Polymers and polymer manufactureTP1080-1185ENNanocomposites, Vol 5, Iss 2, Pp 49-60 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	green solvent regenerated cellulose membrane cellulose nanofiber graphene oxide reinforcement Materials of engineering and construction. Mechanics of materials TA401-492 Polymers and polymer manufacture TP1080-1185
spellingShingle	green solvent regenerated cellulose membrane cellulose nanofiber graphene oxide reinforcement Materials of engineering and construction. Mechanics of materials TA401-492 Polymers and polymer manufacture TP1080-1185 Yinke Liu Shuman Xu Mengfan Jing Yuan Wei Hua Deng Qiang Fu Preparation of high-performance cellulose composite membranes from LiOH/urea solvent system
description	New green solvent system alkali (such as NaOH and LiOH)/urea which could rapidly dissolve cellulose could be potentially used to prepare high-performance regenerated cellulose materials with low cost. Pure regenerated cellulose materials have relatively low strength inherent effects. In this work, we choose TEMPO-oxide cellulose nanofiber (CNF) and graphene oxide (GO) as fillers to prepare isotropic regenerated cellulose membrane (RCM) with significantly enhanced mechanical properties. Dynamic mechanical analyzer (DMA) test shows that RCM with content of 5 wt% CNF has the maximum enhancement value of 32.5% improvement comparing with pure RCM. And RCM with 0.4 wt% GO has the maximum improvement of 17.9%. Mechanical properties decrease with further increasing filler contents. We employ transmission electron microscopy to confirm the structure of fillers in solution and scanning electron microscopy to observe the microstructures of these RCMs. The results are consistent with DMA tests. In addition, XRD results confirm that the crystal structure of RCMs is the same with RCMs without filler. Thermogravimetric analyses results indicate that RCMs keep great thermal stability below 300 °C. Transmittance (Tr) property is carried out by UV–Vis spectroscopy. Pure RCMs and CNF/RCMs keep high transparency at the wavelength of 800 nm. Transparency of RCMs with GO decrease quickly when the content of GO increases. In conclusion, the enhancement mechanism is proposed as the addition of fillers makes up the defects in RCMs. Furthermore, CNF illustrates large aspect ratio which is beneficial for stress transfer. As for GO, polar groups on surface provide strong interaction with the matrix. This is the first time that the enhancement effects of different fillers are systematically analyzed and compared for RCMs system. Our work could benefit the selection of appropriate fillers for such green solvent system and expand its range of applications.
format	article
author	Yinke Liu Shuman Xu Mengfan Jing Yuan Wei Hua Deng Qiang Fu
author_facet	Yinke Liu Shuman Xu Mengfan Jing Yuan Wei Hua Deng Qiang Fu
author_sort	Yinke Liu
title	Preparation of high-performance cellulose composite membranes from LiOH/urea solvent system
title_short	Preparation of high-performance cellulose composite membranes from LiOH/urea solvent system
title_full	Preparation of high-performance cellulose composite membranes from LiOH/urea solvent system
title_fullStr	Preparation of high-performance cellulose composite membranes from LiOH/urea solvent system
title_full_unstemmed	Preparation of high-performance cellulose composite membranes from LiOH/urea solvent system
title_sort	preparation of high-performance cellulose composite membranes from lioh/urea solvent system
publisher	Taylor & Francis Group
publishDate	2019
url	https://doaj.org/article/48812d2198c645639aeae26dbc76e025
work_keys_str_mv	AT yinkeliu preparationofhighperformancecellulosecompositemembranesfromliohureasolventsystem AT shumanxu preparationofhighperformancecellulosecompositemembranesfromliohureasolventsystem AT mengfanjing preparationofhighperformancecellulosecompositemembranesfromliohureasolventsystem AT yuanwei preparationofhighperformancecellulosecompositemembranesfromliohureasolventsystem AT huadeng preparationofhighperformancecellulosecompositemembranesfromliohureasolventsystem AT qiangfu preparationofhighperformancecellulosecompositemembranesfromliohureasolventsystem
_version_	1718398659452731392

Preparation of high-performance cellulose composite membranes from LiOH/urea solvent system

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