Enhanced stability and mechanical strength of sodium alginate composite films

2017 ◽  
Vol 160 ◽  
pp. 62-70 ◽  
Author(s):  
Sijun Liu ◽  
Yong Li ◽  
Lin Li
Keyword(s):  
Mechanical Strength ◽  
Sodium Alginate ◽  
Composite Films ◽  
Enhanced Stability

Nacre-inspired composite films with high mechanical strength constructed from MXenes and wood-inspired hydrothermal cellulose-based nanofibers for high performance flexible supercapacitors

Nanoscale ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 3079-3091
Author(s):  
Libo Chang ◽  
Zhiyuan Peng ◽  
Tong Zhang ◽  
Chuying Yu ◽  
Wenbin Zhong
Keyword(s):  
Mechanical Strength ◽  
High Performance ◽  
Composite Films ◽  
High Mechanical Strength ◽  
Flexible Supercapacitor ◽  
Flexible Supercapacitors

Wood-inspired HCNF@Lig introduced into MXenes constructing a nacre-like material with high mechanical strength and excellent flexibility used as a flexible supercapacitor.

pH-Sensitive graphene oxide/sodium alginate/polyacrylamide nanocomposite semi-IPN hydrogel with improved mechanical strength

RSC Advances ◽  
2015 ◽  
Vol 5 (108) ◽  
pp. 89083-89091 ◽  
Author(s):  
Huijuan Zhang ◽  
Xianjuan Pang ◽  
Yuan Qi
Keyword(s):  
Graphene Oxide ◽  
Mechanical Strength ◽  
Sodium Alginate ◽  
Ph Sensitive ◽  
Swelling Behavior ◽  
Ph Dependent

A pH-sensitive and mechanically strong graphene oxide/sodium alginate/polyacrylamide nanocomposite semi-IPN hydrogel was designed and prepared. The composite semi-IPN hydrogel showed superior mechanical strength and pH-dependent swelling behavior.

scholarly journals Synthesis of Water Resistance and Moisture-Permeable Nanofiber Using Sodium Alginate–Functionalized Waterborne Polyurethane

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2882
Author(s):  
Wen-Chi Lu ◽  
Fu-Sheng Chuang ◽  
Manikandan Venkatesan ◽  
Chia-Jung Cho ◽  
Po-Yun Chen ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Sodium Alginate ◽  
Calcium Chloride ◽  
Strain Curve ◽  
Cost Effective ◽  
Waterborne Polyurethane ◽  
Hydrophilic Nature ◽  
Initial Modulus ◽  
Humid Region ◽  
Crosslinker Concentration

The development of nontoxic and biodegradable alginate-based materials has been a continual goal in biological applications. However, their hydrophilic nature and lack of spinnability impart water instability and poor mechanical strength to the nanofiber. To overcome these limitations, sodium alginate (SA) and waterborne polyurethane (WPU) were blended and crosslinked with calcium chloride; 30 wt % of SA exhibited good compatibility. Further addition of 10 wt % calcium chloride improved the water stability to an extremely humid region. Furthermore, the stress–strain curve revealed that the initial modulus and the elongation strength of the WPU/SA and WPU/CA blends increased with SA content, and the crosslinker concentration clearly indicated the dressing material hardness resulted from this simple blend strategy. The WPU/SA30 electrospun nanofibrous blend contained porous membranes; it exhibited good mechanical strength with water-stable, water-absorbable (37.5 wt %), and moisture-permeable (25.1 g/m2–24 h) characteristics, suggesting our cost-effective material could function as an effective wound dressing material.

scholarly journals Fluorescent and Mechanical Properties of Silicon Quantum Dots Modified Sodium Alginate-Carboxymethylcellulose Sodium Nanocomposite Bio-Polymer Films

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1476 ◽  
Author(s):  
Ji ◽  
Zhang ◽  
Zhang ◽  
Quan ◽  
Huang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Sodium Alginate ◽  
Polymer Films ◽  
Composite Films ◽  
Excitation Wavelength ◽  
Hydrothermal Route ◽  
Silicon Quantum Dots ◽  
One Pot ◽  
Bright Blue Fluorescence ◽  
Bright Blue

Highly luminescent silicon quantum dots (SiQDs) were prepared via one-pot hydrothermal route. Furthermore, the optimal synthetic conditions, dependence of the emission spectrum on the excitation wavelength and fluorescent stability of SiQDs were investigated by fluorescence spectroscopy. SiQDs exhibited bright blue fluorescence, and photoluminescence (PL) lifetime is 10.8 ns when excited at 325 nm. The small-sized SiQDs (~3.3 nm) possessed uniform particle size, crystal lattice spacing of 0.31 nm and silicon (111), (220) crystal planes. Luminescent SiQDs/sodium alginate (SA)-carboxymethylcellulose sodium (CMC) nanocomposite bio-polymer films were successfully fabricated by incorporating SiQDs into the SA-CMC matrix. Meanwhile, SiQDs not only impart strong fluorescence to the polymer, but also make the composite films have favorable toughness.

Effect of Sodium Alginate on the Properties of Composite Protein Films

2014 ◽  
Vol 541-542 ◽  
pp. 49-56 ◽  
Author(s):  
Qiao Lei ◽  
Zhi Ying Huang ◽  
Jia Zhen Pan ◽  
Jian Qiang Bao ◽  
Qian Nan Xun
Keyword(s):  
Sodium Alginate ◽  
Water Solubility ◽  
Uniform Design ◽  
Composite Films ◽  
Barrier Properties ◽  
Protein Films ◽  
Film Forming ◽  
Mean Diameter ◽  
Electron Microscope Analysis ◽  
Design Experiments

Effects of sodium alginate on properties of WPI-NaCas composite films optimized by previous uniform design experiments were investigated. Films were prepared with different concentrations (1%, 2%, 3%) and ratios (1:0, 5:1, 3:1, 1:1, 1:3, 1:5, 0:1, ratio of composite protein solution to sodium alginate solution) of sodium alginate additions. Results suggested increases in water solubility of films and middle diameter, volume-length mean diameter and area-length mean diameter of film-forming solutions. Addition of sodium alginate decreased the gas and water vapor barrier properties of composite films, however, their mechanical properties could be improved by proper usage. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope analysis indicated that protein and sodium alginate presented well interaction and compatibility.

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