Sodium Alginate Solution Transferred by Laser Induced Forward Transfer

Ground reinforcement is a method used to reduce the damage caused by earthquakes. Usually, cement-based reinforcement methods are used because they are inexpensive and show excellent performance. Recently, however, reinforcement methods using eco-friendly materials have been proposed due to environmental issues. In this study, the cement reinforcement method and the biopolymer reinforcement method using sodium alginate were compared. The dynamic properties of the reinforced ground, including shear modulus and damping ratio, were measured through a resonant-column test. Also, the viscosity of sodium alginate solution, which is a non-Newtonian fluid, was also explored and found to increase with concentration. The maximum shear modulus and minimum damping ratio increased, and the linear range of the shear modulus curve decreased, when cement and sodium alginate solution were mixed. Addition of biopolymer showed similar reinforcing effect in a lesser amount of additive compared to the cement-reinforced ground, but the effect decreased above a certain viscosity because the biopolymer solution was not homogeneously distributed. This was examined through a shear-failure-mode test.

Download Full-text

Stability of Anthocyanin from Mulberry Extracts in Alginate Microspheres at High Temperature

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.506.587 ◽

2012 ◽

Vol 506 ◽

pp. 587-590 ◽

Cited By ~ 2

Author(s):

R. Yamdech ◽

Pornanong Aramwit ◽

Sorada Kanokpanont

Keyword(s):

High Temperature ◽

Sodium Alginate ◽

Dry Weight ◽

Flow Rates ◽

Alginate Solution ◽

Water Extracts ◽

External Gelation ◽

Mulberry Fruit ◽

Total Anthocyanins ◽

Mulberry Fruits

The aim of this study was to investigate stabilities of anthocyanins from mulberry fruits extracts in alginate microspheres. The total anthocyanins contents measured from water extracts of mulberry fruits (Chiangmai/Jul cultivars) were at 10.46±0.51 mg/g DW and 15.31±0.86 mg/g DW (Chiangmai/Korat cultivars). At high temperature the extracts lost their anthocyanin contents to 52%wt (at 100°C for 5 hour) and 73%wt (at 121°C for 20 min). Alginate microspheres were prepared using external gelation methods. Sodium alginate solution (2.5%w/v) was sprayed into CaCl2solution (0.1M) through a nozzle at N2flow rates of 20 L/min. The average bead sizes were at 342.03±3.21µm. Anthocyanins loading on alginate microspheres were at 2.283±0.15 mg/g dry weight. At 80(10h), 100(5h) and 121°C(20min), Anthocyanins retention were at 91%wt, 82%wt and 89%wt, respectively. Adsorption of anthocyanins from mulberry fruit extracts on alginate microspheres resulted in a greater stability at high temperature than that of the free anthocyanins.

Download Full-text

Study on the Calamine/Sodium Alginate Modified Viscose Fiber

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.418-420.192 ◽

2011 ◽

Vol 418-420 ◽

pp. 192-195

Author(s):

Dong Qi Liu ◽

Ying Liu ◽

Shu Fa Han ◽

Yu Feng Zhang ◽

Cui Yu Yin

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Sodium Alginate ◽

Mechanical Performance ◽

Viscose Fiber ◽

Alginate Solution ◽

Fiber Properties ◽

Injection Methods ◽

The Stability ◽

Scanning Electron

In this article we successfully prepared calamine / sodium alginate viscose fiber. Good dispersion and stability of the modified solution was prepared by dispersing calamine in alkaline solution of sodium alginate, and then mixed it with viscose spinning solution by spinning injection methods. Moreover, the stability of calamine / sodium alginate solution, the effect of concentration of calamine on the fiber properties is studied in this paper. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and physical mechanical performance are test to characterize the structure and the performance of the calamine / sodium alginate viscose fiber.

Download Full-text

The effect of ionic strength on the viscosity of sodium alginate solution

Polymers for Advanced Technologies ◽

10.1002/pat.97 ◽

2001 ◽

Vol 12 (11-12) ◽

pp. 740-745 ◽

Cited By ~ 16

Author(s):

Hucheng Zhang ◽

Hanqing Wang ◽

Jianji Wang ◽

Ruifang Guo ◽

Qingzhi Zhang

Keyword(s):

Ionic Strength ◽

Sodium Alginate ◽

Alginate Solution

Download Full-text

G133 Influence of various factors to latent heat measurement of the sodium alginate solution

The Proceedings of the Thermal Engineering Conference ◽

10.1299/jsmeted.2014._g133-1_ ◽

2014 ◽

Vol 2014 (0) ◽

pp. _G133-1_-_G133-2_

Author(s):

Yasuo Kato ◽

Takuya Ueto ◽

Hiroshi Katsurayama ◽

Keisuke konishi

Keyword(s):

Sodium Alginate ◽

Latent Heat ◽

Heat Measurement ◽

Alginate Solution

Download Full-text

The Research on the Preparation of Sodium-Poly-Methyl-Acrylic and Sodium-Alginate Blend-Micro-Spheres and its Form

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.311-313.2291 ◽

2011 ◽

Vol 311-313 ◽

pp. 2291-2294

Author(s):

Lian Hai Shan ◽

Zhi Bin Zhang ◽

Qun Lu

Keyword(s):

Particle Size ◽

Sodium Alginate ◽

Influencing Factors ◽

Radical Reaction ◽

Volume Ratio ◽

Free Radical Reaction ◽

Alginate Solution ◽

Important Means ◽

External Form ◽

Scanning Electron

First, we prepared the Poly-methyl-acrylic Acid hydrogels by free radical reaction, then prepared the Sodium-Poly-methyl-acrylic and Sodium-Alginate blend-micro-spheres by the condensation phase separation method. The influencing factors of the form and the particle size of the blend-micro-spheres were investigated including the content of the Sodium-Poly-methyl-acrylic, the content of the Sodium-Alginate, the content of the calcium chloride and the volume ratio for the Sodium-Poly-methyl-acrylic solution and the Sodium-Alginate solution. We also give a research on the swelling influencing factors of the blend-micro-spheres and observed its internal and external form by the scanning electron microscope (SEM) ; The result showed that: we can get the favorable appearance form blend-micro-spheres when the Content of PMAA 4.0%，the Content of SA 4.0%，the Content of CaCl2 4.0%; and it had a important means when the volume ratio for the Sodium-Poly-methyl-acrylic solution and the Sodium-Alginate solution was 1:4 , 1:1.

Download Full-text

Preparation and Evaulation of Degradable Poly(lactic acid) Composite Dressings

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.123-125.177 ◽

2010 ◽

Vol 123-125 ◽

pp. 177-180 ◽

Cited By ~ 5

Author(s):

Ching Wen Lou ◽

Chao Tsang Lu ◽

Shih Peng Wen ◽

Ching Wen Lin ◽

Chieh Yu Chao ◽

...

Keyword(s):

Sodium Alginate ◽

Uv Light ◽

Volume Ratio ◽

Nonwoven Fabric ◽

Air Permeability ◽

Poly Lactic Acid ◽

Cross Linking ◽

Alginate Solution ◽

Optimum Parameters ◽

Needle Punching

Chitosan and sodium alginate are two prominent biomaterials because they have some unique properties such as good biocompatible and biodegradable. In this study, sodium alginate was as swelling and moisture retention layer; Chitosan was antibacterial layer.Polylactic acid (PLA) blended in different weight ratios with low melting point polylactic acid (LMPLA) to fabricate nonwoven fabric which reinforced by needle punching and hot pressing. Afterward, chitosan/ sodium alginate compound solution were treated by UV light in order to form cross-linking. Then chitosan/ sodium alginate compound solution coated on the PLA nonwoven fabric to make PLA composite dressings. The mechanical properties of chitosan/ sodium alginate membrane and dressing were measured. The optimum parameters of chitosan/sodium alginate composite membrane was treated by UV light for five minutes and the volume ratio of chitosan (3 wt %) and sodium alginate (1 wt %) solution was 8:2. After we coated chitosan/sodium alginate solution on PLA nonwoven fabric, the Tensile strength, and tear strength were upgraded by 80 % and 98 %; its air permeability and flexibility length, however, dropped by 18 % and 60 %, respectively.

Download Full-text