Inicio  /  Coatings  /  Vol: 8 Núm: 6 Par: June (2018)  /  Artículo
ARTÍCULO
TITULO

Surface Treatment of Bacterial Cellulose in Mild, Eco-Friendly Conditions

Adriana Nicoleta Frone    
Denis Mihaela Panaitescu    
Ioana Chiulan    
Cristian Andi Nicolae    
Angela Casarica    
Augusta Raluca Gabor    
Roxana Trusca    
Celina Maria Damian    
Violeta Purcar    
Elvira Alexandrescu and Paul Octavian Stanescu    

Resumen

Bacterial cellulose (BC) with increased hydrophobicity is required for several applications including packaging. Surface functionalization of BC may provide good resistance to moisture, increased barrier properties or improved compatibility to polymer matrices. For this purpose, chemical grafting of BC in mild, eco-friendly conditions was carried out using different agents. BC membranes were surface functionalized with vinyl-triethoxy silane (VS) or 3-aminopropyl triethoxysilane (APS), by acylation and acrylation. The efficiency of the surface treatments was highlighted by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy, by contact angle measurements and by dynamic mechanical analysis. The morphological investigation by atomic force microscopy and scanning electron microscopy revealed an increased compactness for surface functionalized BC, which correlated well with the different increase of the contact angle. BC treated with APS and VS showed more than a twofold increase in contact angle value. Similarly, the crystallinity degree was reduced to 69.6% and 72.9% after APS and VS treatments as compared with 84.1% for untreated BC, confirming the grafting reaction and the decrease in hydrogen bonding. All the applied treatments delayed the degradation of BC. However, the highest increase in thermal stability was observed for silanes treated membranes. Effective, eco-friendly methods for improving the surface hydrophobicity of bacterial cellulose for food packaging were proposed in this study.

Palabras claves

 Artículos similares

       
 
Xuxing Huang, Xuefeng Li, Hequn Li, Shanda Duan, Yihao Yang, Han Du and Wuning Xiao    
The goaf treatment of underground metal mines is an important link in mining, and it is particularly important to master the laws of overlying rock strata and surface movement of goaf. In this paper, Persistent Scatterer Interferometric Synthetic Apertur... ver más
Revista: Applied Sciences

 
Esra Billur Balcioglu Ilhan, Fatih Ilhan, Ugur Kurt and Kaan Yetilmezsoy    
The use of various advanced oxidation methods in the treatment of wastewater has become the subject of many studies published in recent years. In particular, it is exceedingly significant to compare these treatment methods for industrial wastewater to re... ver más
Revista: Water

 
Hasan Mhd Nazha, Mhd Ayham Darwich, Basem Ammar, Hala Dakkak and Daniel Juhre    
An investigation was conducted to examine the photothermal and thermomechanical effects of short-pulse laser irradiation on normal tissues. This study analyzed the impact of short-pulse laser radiation on the heat-affected region within tissues, taking i... ver más
Revista: Applied Sciences

 
Zhili Wang, Lan Liang, Ning Li, Shuang Wu, Zhanjun Cheng, Beibei Yan and Guanyi Chen    
Graphite carbon nitride (g-C3N4) has been employed as an emerging metal-free catalyst in heterogeneous catalysis. However, the catalyst has a poor activation property for peroxymonosulfate (PMS). In this study, Bi-Fe oxide co-doped g-C3N4 (Bi@Fe/CN) was ... ver más
Revista: Applied Sciences

 
Claudia Cannas, Benedetta Pintus, Lina Corgiolu, Enrico Borrelli, Giacomo Boscia, Mario Damiano Toro and Giuseppe Giannaccare    
The present article provides an overview of photobiomodulation (PBM), also known as low-level laser light therapy (LLLT), which has garnered attention in ophthalmology for its potential therapeutic benefits in various ocular diseases. Photobiomodulation ... ver más
Revista: Applied Sciences