scholarly journals Surface modification of cellulose nanocrystals with different acid anhydrides for improved dispersion in poly(butylene succinate)

RSC Advances ◽  
2018 ◽  
Vol 8 (67) ◽  
pp. 38305-38314 ◽  
Author(s):  
Yingying He ◽  
Jiang Zhu ◽  
Wentao Wang ◽  
Haitao Ni
Keyword(s):  
Mechanical Property ◽  
Thermal Stability ◽  
Surface Modification ◽  
Cellulose Nanocrystals ◽  
Butylene Succinate ◽  
High Dispersity ◽  
Acid Anhydrides

The hydrophobic CNC was dispersed in PBS to become a high dispersity and mechanical property and thermal stability PBS/modified-CNC composite.

scholarly journals Surface Modification of Cellulose Nanocrystals with Succinic Anhydride

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 866 ◽  
Author(s):  
Agnieszka Leszczyńska ◽  
Paulina Radzik ◽  
Ewa Szefer ◽  
Matej Mičušík ◽  
Mária Omastová ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Surface Modification ◽  
Thermal Properties ◽  
Reaction Time ◽  
Cellulose Nanocrystals ◽  
Succinic Anhydride ◽  
Molar Ratio ◽  
Hydroxyl Groups ◽  
Degree Of Esterification ◽  
Thermal Stability Of

The surface modification of cellulose nanocrystals (CNC) is a key intermediate step in the development of new functionalities and the tailoring of nanomaterial properties for specific applications. In the area of polymeric nanocomposites, apart from good interfacial adhesion, the high thermal stability of cellulose nanomaterial is vitally required for the stable processing and improvement of material properties. In this respect, the heterogeneous esterification of CNC with succinic anhydride was investigated in this work in order to obtain CNC with optimised surface and thermal properties. The influence of reaction parameters, such as time, temperature, and molar ratio of reagents, on the structure, morphology and thermal properties, were systematically studied over a wide range of values by DLS, FTIR, XPS, WAXD, SEM and TGA methods. It was found that the degree of surface substitution of CNC increased with the molar ratio of succinic anhydride to cellulose hydroxyl groups (SA:OH), as well as the reaction time, whilst the temperature of reaction showed a moderate effect on the degree of esterification in the range of 70–110 °C. The studies on the thermal stability of modified nanoparticles indicated that there is a critical extent of surface esterification below which only a slight decrease of the initial temperature of degradation was observed in pyrolytic and oxidative atmospheres. A significant reduction of CNC thermal stability was observed only for the longest reaction time (240 min) and the highest molar ratio of SA:OH. This illustrates the possibility of manufacturing thermally stable, succinylated, CNC by controlling the reaction conditions and the degree of esterification.

scholarly journals Curcumin-loaded polyvinyl butyral film with antibacterial activity

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 673-681
Author(s):  
Yanchao Qiao ◽  
Lijie Duan
Keyword(s):  
Mechanical Property ◽  
Thermal Stability ◽  
Antibacterial Activity ◽  
Polyvinyl Butyral ◽  
Counting Method ◽  
E Coli ◽  
Antibacterial Materials ◽  
Good Antibacterial Activity ◽  
Colony Counting ◽  
Widespread Interest

AbstractAntibacterial materials have found widespread interest in different fields nowadays. In this study, curcumin (Cur) was incorporated into the polyvinyl butyral (PVB) matrix by dissolving in ethanol for improving the functional properties of a pure PVB film. We found that Cur was uniformly dispersed in the PVB matrix, which showed good compatibility. Moreover, the incorporation of Cur could also improve thermal stability, hydrophilicity, and mechanical property. The UV-vis spectra of the PVB–Cur film demonstrated that the film could block ultraviolet radiation. Subsequently, the antibacterial activity of the PVB–Cur film was measured by the colony-counting method against S. aureus and E. coli. The results showed that the PVB–Cur film exhibited good antibacterial activity. Therefore, the PVB–Cur film was considered as a promising material for food and medical packaging applications.

scholarly journals Surface modification of cellulose nanocrystals

Nanoscale ◽  
2014 ◽  
Vol 6 (14) ◽  
pp. 7764-7779 ◽  
Author(s):  
Samuel Eyley ◽  
Wim Thielemans
Keyword(s):  
Surface Modification ◽  
Cellulose Nanocrystals ◽  
Nanocrystalline Cellulose ◽  
Chemical Modifications

This review takes an in-depth look at the chemical modifications that have been carried out on nanocrystalline cellulose.

Thermal stability and fire reaction of poly(butylene succinate) nanocomposites using natural clays and FR additives

2017 ◽  
Vol 29 (1) ◽  
pp. 69-83 ◽  
Author(s):  
Loic Dumazert ◽  
Damien Rasselet ◽  
Bo Pang ◽  
Benjamin Gallard ◽  
Salima Kennouche ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Butylene Succinate ◽  
Natural Clays
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