A Study on Moisture Absorption Test of Alkali-Treated Green Fibers

2021 ◽  
pp. 11-19
Author(s):  
Ipsita Jena ◽  
Sasmita Kar
Keyword(s):  
Moisture Absorption ◽  
Absorption Test

A novel accelerated moisture absorption test and characterization

2009 ◽  
Vol 40 (9) ◽  
pp. 1501-1505 ◽  
Author(s):  
Siva P. Pilli ◽  
Kevin L. Simmons ◽  
James D. Holbery ◽  
Vaithiyalingam Shutthanandan ◽  
Patrick B. Stickler ◽  
...  
Keyword(s):  
Moisture Absorption ◽  
Absorption Test

Moisture Absorption Behavior and Morphology of Thermoplastic Starch via Ascorbic Acid Hydrolysis Technique

2017 ◽  
Vol 264 ◽  
pp. 148-151
Author(s):  
Amirah Hulwani Mohd Zain ◽  
Mohamad Kahar Ab Wahab
Keyword(s):  
Ascorbic Acid ◽  
Moisture Absorption ◽  
Starch Granule ◽  
Thermoplastic Starch ◽  
Continuous Phase ◽  
Ester Bond ◽  
Absorption Test ◽  
Ftir Analysis ◽  
Mechanical Process ◽  
Scanning Electron

The effect of modified thermoplastic starch (TPS) with organic acid was studied. In presence of ascorbic acid (AATPS) and glycerol (GTPS) along with mechanical process, a native starch granule was transform into a continuous phase as shown by scanning electron microscopy (SEM). Reaction of ascorbic acid (AA) with starch induced to the formation of the ester bond, which improved moisture resistivity of TPS was proven by the determination degree of substitution (DS) and moisture absorption test. The formation of ester bond was identified by using FTIR analysis. The DS values were ranging from 0 to 0.052, respectively, with the increase of AA content.

scholarly journals Physical, Mechanical, and Thermal Analysis of Polylactic Acid/Fumed Silica/Clay (1.28E) Nanocomposites

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Josephine Chang Hui Lai ◽  
Md. Rezaur Rahman ◽  
Sinin Hamdan
Keyword(s):  
Polylactic Acid ◽  
Fumed Silica ◽  
Moisture Absorption ◽  
Absorption Test ◽  
Film Casting ◽  
Solution Intercalation ◽  
Casting Technique ◽  
Clay Loading ◽  
Ft Ir ◽  
Scanning Electron

Polylactic acid/fumed silica/clay (PLA/FS/clay) (1.28E) nanocomposites have been successfully prepared by solution-intercalation film-casting technique. The resultant nanocomposites were characterized by Fourier Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), tensile test, thermogravimetric analysis (TGA), and moisture absorption test. The FT-IR spectrum indicated that PLA/FS/clay with 2 wt% had much broader peak compared to 5 wt%, 10 wt%, and 15 wt% nanocomposites. Incorporation of clay (1.28E) with 2 wt% showed the best compatibility with PLA/FS matrix. PLA/FS/clay (1.28E) nanocomposite with 2 wt% of clay loading had higher tensile strength and modulus compared to other nanocomposites. The thermal stability and activation energy of 2 wt% of PLA/FS/clay (1.28E) nanocomposite are the highest among all the nanocomposites. The moisture absorbed into PLA/FS/clay (1.28E) nanocomposite was significantly reduced with clay loading of 2 wt%.

Moisture Absorption and Shock Cushioning Behavior of Flexible Polyurethane Foam Filled with Saw Dust

2012 ◽  
Vol 626 ◽  
pp. 677-680 ◽  
Author(s):  
Syahidah M. Rum ◽  
Mohd Azlan ◽  
N.V. David
Keyword(s):  
Polyurethane Foam ◽  
Moisture Absorption ◽  
Polyurethane Foams ◽  
Second Law ◽  
Absorption Test ◽  
Saw Dust ◽  
Foam Filled ◽  
Diffusion Rates ◽  
Flexible Polyurethane Foam ◽  
Flexible Polyurethane

This paper presents the moisture absorption and shock cushioning properties of flexible polyurethane foams (PU) filled with saw dust fibers at 10, 15 and 20wt%. The compositeswere fabricated using open molded method from a two-part liquid foamsystem consisting of part-A (Isocyanate) and part-B (Polyol).The diffusion rates from the moisture absorption test is calculated using Ficks second law equation. Thesample with 10 wt% filler shows the highest diffusion ratewhile the lowest rateis sample with15wt% filler. The shock cushioning properties was determined via drop test where an 11.48-kg weight is dropped, from a height of 610 cm on the composites. The average Gvalue that represents product fragility was found to be 55.45.

scholarly journals FTIR and Moisture Absorption of Yam Bean Starch Biocomposites with Yam Bean (Pachyrhizus erosus) Bagasse Fibers as Reinforcement

2018 ◽  
Vol 19 (2) ◽  
pp. 93
Author(s):  
Melbi Mahardika ◽  
Hairul Abral ◽  
Anwar Kasim ◽  
Syukri Arief ◽  
Mochamad Asrofi
Keyword(s):  
Relative Humidity ◽  
Moisture Absorption ◽  
Dry Weight ◽  
Absorption Test ◽  
Solution Casting ◽  
Fabrication Method ◽  
Pachyrhizus Erosus

Biocomposites from yam bean starch with yam bean bagasse (YBB) fibers as reinforcement has been successfully fabricated. The fabrication method was solution casting. YBB was variated for 1, 2, 3 and 4wt% (from dry weight starch basis). 2 mL glycerol was used as a plasticizer. The relative humidity (RH) condition in moisture testing was 99%. The result shows that the addition YBB able to decreased moisture absorption of starch film. The lowest moisture absorption was in biocomposites with 4wt% YBB. The moisture absorption test was supported byfourier transform infrared (FTIR) data.Keywords: Biocomposite, yam bean, yam bean bagasse, moisture, FTIR

Hydrolyzation of Edible Starches: Their Preparations and Properties

2016 ◽  
Vol 875 ◽  
pp. 63-76
Author(s):  
Singan Grace ◽  
Kang Chiang Liew
Keyword(s):  
Moisture Absorption ◽  
Starch Content ◽  
Chemical Properties ◽  
Hydroxyl Group ◽  
Absorption Test ◽  
Native Starch ◽  
Hydrolysis Method ◽  
Hydrolysis Process ◽  
Ft Ir ◽  
Ir Analysis

Starch is the most important polysaccharide and has become the major component of many food industries as well as textile, paper, cosmetic and certain industries that engage in adhesive, thickening, stiffening and gelling agents. However, native starch has limited function and therefore is recommended to modify its physical and chemical properties to meet the consumers’ needs. In this study, the native starch was chemically modified to determine its behavior and characteristics after using hydrolysis process of acid hydrolysis method. There were three types of starch that has been studied - potato, cassava and corn. These starches undergone hydrolysis process using hydrochloric acid and their characteristics were determinedthrough moisture absorption test and Fourier Transform Infrared Spectroscopy (FT-IR) analysis. For moisture absorption test, hydrolyzed starch tends to absorb more surrounding moisture than native starch. This behavior resulted from the increase of hydrophilic character of starch after being modified. The FT-IR analysis shows that hydrolyzed starch content got more hydroxyl group than the native starch due to the breakdown of hydrogen bond between the starch molecules after the acid hydrochloric treatment.

Impact Characteristics of CFRP Hat-Shaped Members According to Changes in Outer Layer under the Hygrothermal Environment

2013 ◽  
Vol 284-287 ◽  
pp. 143-146
Author(s):  
Yong Jun Yang ◽  
In Goo Yeo ◽  
Woo Chae Hwang ◽  
Hyun Kook ◽  
In Young Yang
Keyword(s):  
Test Specimen ◽  
Moisture Absorption ◽  
Strength Degradation ◽  
Impact Loads ◽  
Absorption Test ◽  
Heat Chamber ◽  
Cfrp Composite ◽  
Hygrothermal Environment ◽  
Impact Characteristics ◽  
Harsh Condition

CFRP composite material, which is reinforced with carbon fiber, features superior heat and corrosion resistance, and these benefits enables the gradual applications on aerospace industries and sports-entertainment business. However, guarantee on superior strength and rigidity on harsh condition, such as hot moisture environment and collision load is extremely difficult. Therefore, in study moisture absorption test was conducted until complete moisture absorption in test specimen using hygrothermal heat chamber to evaluate strength degradation in CFRP composite under hygrothermal environment. As a result, the effect of moisture absorption and impact loads of approximately 50% reduction in strength are shown.

scholarly journals Improving Rutting Resistance of Flexible Pavement Structure By Using Waste Plastic

2021 ◽  
Vol 889 (1) ◽  
pp. 012030
Author(s):  
Ankit Dhiman ◽  
Nitin Arora
Keyword(s):  
Moisture Absorption ◽  
Flexible Pavement ◽  
Absorption Test ◽  
Small Particles ◽  
Waste Plastic ◽  
Rutting Resistance ◽  
Traffic Loads ◽  
Pavement Distresses ◽  
Pavement Structure ◽  
Test Impact

Abstract On these days traffic is increasing faster rate on roads then various type of defects are produced on road that is rutting, raveling etc A pavement structure have different layers purpose to transfered traffic loads to the sub grade. Rutting is one of the pavement distresses that effects the performance of road pavements. Waste plastic is the type of materials to use for improving the performance of flexible pavements against rutting. In this study utilization of waste plastic water bottles, cold drink bottles, polythene bags, parcel package polythene and films. This waste material clean and shredded small particles (1-3cm) sizes. Aggregate heated 170-200° and mix particles with different percentage (3%, 5%, 7%) properly coated on hot aggregate. This plastic waste coated aggregate is also mixed with hot bitumen. And perform some laboratory test (impact value test, moisture absorption test, marshal value test) on the sample and check the property of rutting resistance.

Inter Layer Dielectric Defect Induced High Contact Resistance

2010 ◽  
Author(s):  
Re-Long Chiu ◽  
Jason Higgins ◽  
Toby Kinder ◽  
Juha Tyni ◽  
Sharon Ying ◽  
...  
Keyword(s):  
Contact Resistance ◽  
Failure Analysis ◽  
Failure Mode ◽  
Phosphorus Content ◽  
Moisture Absorption ◽  
Thermal Processes ◽  
Analysis Methods ◽  
Low Phosphorus

Abstract High contact resistance can be caused by moisture absorption in low phosphorus content BPTEOS. Moisture diffused through the TiN glue layer is absorbed by the BPTEOS during subsequent thermal processes resulting in increased contact resistance. This failure mode was studied by combining different failure analysis methods and was confirmed by duplication on experimental wafers.

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