High‐performance starch/clay bionanocomposite for textile warp sizing

Abstract

In this study, an oxidized starch (OS)/montmorillonite (MMT) nanocomposite was prepared via a solution intercalation method. Before incorporating MMT into OS, MMT was organically modified with 20 wt% of octadecyl dimethyl tertiary amine followed by a hydrophilic ball‐milling treatment in the presence of urea, ethanol, and formaldehyde (two‐step processing technique). X‐ray diffraction revealed that the interlayer spacing of the MMT expanded from 1.29 to 2.00 nm after the organic modification and MMT turned into an exfoliated state after the hydrophilic treatment and the solution intercalation, which was also confirmed by transmission electron microscope result. Owing to the interaction between OS and the silicate layers, the hygroscopicity of the obtained nanocomposite decreased and the mechanical properties were improved. Our work demonstrates that the two‐step processing technique is a promising method for modifying MMT nanofillers and preparing starch/MMT nanocomposites, which paves a way for preparing other polar polymer‐based nanocomposites and developing environment‐friendly textile sizing materials. POLYM. COMPOS., 39:E441–E447, 2018. © 2017 Society of Plastics Engineers

Comparison of Mechanical Reinforcement Effects of Cellulose Nanofibers and Montmorillonite in Starch Composite

“…One of the major drawbacks of starch‐based materials can be attributed to their sensitivity to moisture and water, thus affecting its tensile properties and stability . The effect of CNF and MMT with different contents on Mu of the starch based nanocomposite films were evaluated under 68% RH at a room temperature of 20 ± 2 °C for 10 days and the results are shown in Figure and Table .…”

“…One of the major drawbacks of starch-based materials can be attributed to their sensitivity to moisture and water, thus affecting its tensile properties and stability. [33,34] The effect of CNFand MMT with different contents on Mu of the starch based nanocomposite films were evaluated under 68% RH at a room temperature of 20 AE 2 C for 10 days and the results are shown in Figure 6 and Table 2. It is observed that the equilibrium Mu of CS film in this condition was 19.28%, which is higher than that of CS/CNFs (17.12%, 16.73%, 17.82%, 17.69%) and CS/MMTs (17.75%, 17.74%, 17.08%, 17.79%) nanocomposite films.…”

Recent Advances in Thermoplastic Starch Biodegradable Nanocomposites

“…A complete exfoliation is a difficult task, and researchers have developed several strategies to achieve it or at least to improve the dispersion degree. These strategies include Processing techniques [1,[73][74][75][76] and chemical Modification of Nanoclays and/or matrices [67,71,72,[77][78][79]. Several works can be found in the literature dealing with Thermoplastic starch/ clay Nanocomposites mainly for Packaging [78,[80][81][82][83] and agricultural applications [77,84,85].…”

Swelling and Shrinking Behavior of Modified Starch Biopolymer with Iron Oxide

“…Starch-based films are brittle and hydrophilic, therefore limiting their processing and application. [16] For improving the properties, [17][18][19] of the starch polymer, [20] starch can be mixed with various synthetics, [21,22] and natural polymers [23] such as multilayer structures, [24,25] with aliphatic polyesters, chitosan, blends with natural rubber and composites with fibers. [26,27] The modified properties of biopolymer [28][29][30][31][32] can be utilized in different applications such as polymer electrolytes for lithium batteries, [33] electronic applications, [34,35] as a membranes for separation, as a catalysis, lab-on-chip technologies, stimuli-responsive shape memory polymer, [36] biomedical application, [37,38] orthopedic surgery, [39] tissue engineering, and 3D printed scaffolds for bone tissue regeneration.…”