期刊
CARBOHYDRATE POLYMERS
卷 169, 期 -, 页码 315-323出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.04.031
关键词
Cladophora; Cellulose; Nanocrystal; Green algae; Nanofiber
资金
- DOST-SEI ASTHRDP
- DOST-PCIEERD-NRCP [P-025]
- DLSU-URCO
Cellulose nanocrystals (CNCs) are promising materials that are readily extracted from plants and other cellulose-containing organisms. In this study, CNCs were isolated from freshwater green algae (Cladophora rupestris) thriving in a volcanic lake, using hydrobromic acid (HBr) hydrolysis. Morphological and structural studies revealed highly crystalline CNCs (94.0% crystallinity index) with preferred orientation to [100] lattice plane as shown by XRD measurements and have an average diameter of 20.0 (+/-4.4) nm as shown by TEM. Thermal studies showed increased temperature for thermal decomposition of CNCs (381.6 degrees C), which is a result of HBr hydrolysis for CNCs isolation. The isolated CNCs were reinforced into starch based biocomposites via solution casting and evaporation method. Mechanical strength was improved as high as 78% upon addition of 1% cellulose nanocrystals in the films. The produced films are promising materials for their high mechanical strength, biodegradability and availability of raw materials. (C) 2017 Elsevier Ltd. All rights reserved.
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