Nanocellulose reinforced starch biocomposite films via tape-casting technique

被引：2
|
作者：
Garuti, Giovana Ladislau [1 ]
de Freitas, Roberta Ranielle Matos [1 ]
de Lima, Vitor Hugo [1 ]
do Carmo, Karina Palmizani [2 ]
de Padua, Franciane Andrade [1 ]
Botaro, Vagner Roberto [1 ,2 ]
机构：
[1] Univ Fed Sao Carlos UFSCAR, Lab Mat Polimer & Bioenergia, Soracaba, SP, Brazil
[2] Univ Fed Ouro Preto UFOP, Lab Mat Polimer, Ouro Preto, MG, Brazil
来源：
POLIMEROS-CIENCIA E TECNOLOGIA | 2024年 / 34卷 / 01期
基金：
巴西圣保罗研究基金会;
关键词：
nanocomposites; biopolymers; starch films; nanocellulose; tape-casting; CASSAVA STARCH; BARRIER PROPERTIES; WATER; TIME;
D O I：
10.1590/0104-1428.20230084
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The objective of this study was to characterize the physicochemical-mechanical properties of corn and cassava starch films reinforced with CNF via Tape-Casting. There were differences in size and shape of the starch granules. Corn starch nanocomposites (NCO) showed a significant increase in tensile strength (5.14 to 25.58 MPa) and significant decrease in strain (24.81 to 2.76%) as the CNF concentration increased. Among the cassava starch nanocomposites (NCA), only the cassava starch sample with 1% CNF (NCA-1) showed significant difference both in the maximum stress (4.94 MPa) and strain (15.17%). The corn starch sample with 2% of CNF (NCO-2) presented a lower roughness and NCA-1 a smooth surface. There was no difference in chemical composition between the samples. The CNF-free starch films showed more transparency than other films. The NCA showed more transparency than NCO. Tape-casting technique unveils enhanced mechanical properties of cellulose nanofiber-reinforced starch films. Starch nanocomposites exhibit improved tensile strength and surface characteristics.
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收藏
页数：11
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