scholarly journals Kapok Fiber- Structure, Characteristics and Applications: A Review

2021 ◽  
Vol 37 (3) ◽  
pp. 513-523
Author(s):  
Reygan H. Sangalang
Keyword(s):  
Electrode Material ◽  
Scientific Community ◽  
Natural Fiber ◽  
Fiber Structure ◽  
Kapok Fiber ◽  
Structure Characteristics ◽  
Pale Yellow ◽  
Important Material ◽  
Brown Fiber

Kapok fiber is a light, cottony, pale yellow to brown fiber obtained from Kapok fruit. The fiber is characterized by a large, hollow lumen and is generally hydrophobic due to its waxy surface. The fiber is difficult to spun into thread and it is commonly used as filling in mattresses, pillows, stuffed toys and upholstery. Compared to other natural fiber, kapok’s use is limited in application. However, it is now gaining attention in the scientific community as an important material due to its outstanding properties. This review will provide a detailed overview on the structure, composition and morphology of kapok fiber. It will also discuss the recent researches conducted on kapok fiber including its application as adsorbent material, biocomposite, biotemplate, electrode material and others.

Obtention and Characterization of Collagen and Chitosan Based Cements for Bone Regerneration. Part 1: Extraction and Characterization of Collagen

2014 ◽  
Vol 775-776 ◽  
pp. 29-33 ◽  
Author(s):  
Karine Cappucio de Castro ◽  
Ivan Silva Prado ◽  
Moacyr Clemente Júnior ◽  
Sylma Carvalho Maestrelli ◽  
Neide Aparecida Mariano ◽  
...  
Keyword(s):  
Cross Linking ◽  
Infrared Analysis ◽  
Fiber Structure ◽  
Cross Link ◽  
Scanning Calorimetry ◽  
High Mechanical Strength ◽  
Structure Characteristics ◽  
Cross Linker ◽  
High Degree

Several cements are used as biomaterials. Biopolymers such as chitosan and collagen exhibit excellent biocompatibility and can be used in the remodeling of bone tissue. The cement must have high mechanical strength and compatibility with original tissue. In this context, the objective of this study was to extract, characterize and cross-link collagen from bovine tendon, forlater associate it with chitosan and calcium phosphate to obtain cements for bone regeneration. Glutaraldehyde was used as cross-linker in 0.1, 0.5, 1.0 and 10% concentration. Infrared analysis confirmed the presence of functional groups characteristic of collagen, whereas the capacity of water absorption decreased with the increasing of cross-linking degree. Denaturation temperatures of collagen samples were obtained by Differential Scanning Calorimetry and Scanning Electron Microscopy showed the fiber structure characteristics of collagen, which were more organized for high degree of cross-linking samples.

The Comparison of Sound Absorption of Kapok-Based Fiber Nonwoven Fabrics

2014 ◽  
Vol 1004-1005 ◽  
pp. 562-565 ◽  
Author(s):  
Xue Ting Liu ◽  
Xiong Yan ◽  
Jie Hong ◽  
Hui Ping Zhang
Keyword(s):  
Sound Absorption ◽  
Function Method ◽  
Natural Fiber ◽  
Frequency Region ◽  
Air Gap ◽  
Polyester Fiber ◽  
Kapok Fiber ◽  
Nonwoven Fabrics ◽  
Transfer Function Method ◽  
Absorbing Materials

As a natural fiber, kapok fiber has the high hollow degree that is very good for sound absorption. Four different kinds of kapok-based fiber nonwoven fabrics, made by kapok fiber mixing with hollow polyester, viscose fiber, PP fiber and cotton fiber respectively, were made and the sound absorption coefficients were measured in the frequency region of 100 - 6300 Hz by using a two-microphone transfer-function method. The comparisons of the sound absorption for four types of materials with similar thickness and densities with no air gap and with 1 cm, 3 cm air gap were made. The results indicate that the sound absorption of kapok/hollow polyester fiber nonwoven fabrics is superior to those of other three ones and kapok/hollow polyester fiber nonwoven fabrics can be used for sound-absorbing materials in engineering.

Sound-Absorbing Properties of Kapok Fiber Nonwoven Composite at Low-Frequency

2013 ◽  
Vol 821-822 ◽  
pp. 329-332 ◽  
Author(s):  
Xue Ting Liu ◽  
Li Li ◽  
Xiong Yan ◽  
Hui Ping Zhang
Keyword(s):  
Bulk Density ◽  
Sound Absorption ◽  
Natural Fiber ◽  
Low Frequency ◽  
Polyester Fiber ◽  
Physical Parameters ◽  
Absorption Properties ◽  
Kapok Fiber ◽  
Absorbing Materials ◽  
Properties Of Composites

More and more concern for environmental problems has led public to use natural and environmentally benign sound-absorbing materials. In this study, the sound-absorbing nonwoven composites based on kapok fiber and hollow polyester fiber were developed and sound absorption properties of kapok fiber nonwoven composites were investigated in the low frequency region of 100-500 Hz using the impedance tube method. The poor sound-absorbing at low-frequency is one of the difficult problems that urgently need to be solved in fibrous sound-absorbing materials. The effects of physical parameters, including bulk density and thickness, and depth of back cavity on sound absorption properties of composites were studied. Increasing of the bulk density, thickness and depth of back cavity is contribute to improve sound absorption properties of composites at low frequency. The comparisons of kapok fiber with polypropylene (PP) fiber and hollow polyester fiber indicated that as a natural fiber, kapok fiber had a superior acoustical properties at low frequency.

Characterization and Properties of Alkali Treated Flax

2013 ◽  
Vol 448-453 ◽  
pp. 1128-1132 ◽  
Author(s):  
Wei Hu ◽  
Minh Tan Ton-That
Keyword(s):  
Mechanical Properties ◽  
Natural Fiber ◽  
Alkali Treatment ◽  
Natural Material ◽  
Fiber Structure ◽  
Promising Application ◽  
As Stress ◽  
Proper Condition ◽  
Better Than ◽  
Properties Of Composites

Flax, a kind of natural fiber, has been widely applied as reinforcing materials for polymer composites because of its superior tensile properties. It normally contains noncellulose portions and other impurities, which could act as stress concentration regions to affect negatively the mechanical properties of composites. In this work, canadian linseed flax (F1) was treated by alkali to remove the noncellulose portions and impurities. The treated F1 was characterized in detail applying SEM, FTIR, TGA and single fiber tensile test for its promising application in composites as natural material. The proper condition of alkali treatment was explored and determined to be 2% of NaOH for 1h at 80°C. Under this condition, the mechanical property of the fiber was 10% better than that of untreated F1, and the non-cellulose portion removing ratio was more than 25% without hurting fiber structure.

scholarly journals Kajian Awal Pemanfaatan Rumput Teki (Fimbristylis sp), Linggi (Penicum sp) dan Sianik (Carex sp) sebagai Serat Alami untuk Bahan Alat Penangkapan Ikan

2012 ◽  
Vol 14 (1) ◽  
pp. 100
Author(s):  
Nofrizal Nofrizal ◽  
Muchtar Ahmad ◽  
Irwandy Syofyan ◽  
Ied Habibie
Keyword(s):  
Water Content ◽  
Experimental Method ◽  
Natural Fiber ◽  
Breaking Strength ◽  
Natural Fibre ◽  
Fishing Gear ◽  
Fiber Structure ◽  
Wet Condition ◽  
Average Water ◽  
Observation Method

This research was aimed to study about the potential of fiber structure teki grass (Fimbristylis sp), linggi grass (Penicum sp) and sianik grass(Carex sp) as natural fibre for fishing gear materials. The parameter of this research are; water content, elongation, breaking strength andhistology of the fiber. This research used the observation and experimental method. The observation method is used to know the fiberstructure and water content of teki grass, linggi grass and sianik grass. The experimental method was used to test the breaking strength andelongation of the objects in wet and dry condition. Based on the histology observation, teki grass has an epidermis layers as fiber structure.It consists of parenchyma tissue and collenchymas tissue.Fiber structure of linggi grass and sianik grass are similar with teki grass. Sianikgrass has the most excessive epidermis layer than others i.e. 5.57 gram. The average water content of teki grass is 1.03 gram, and linggi grassis 0.17 gram. Based on the breaking strength test, sianik grass is stronger than others with average strength 9.05 kgf in wet condition and9.75 kgf in dry condition. Meanwhile, breaking strength of the teki grass and linggi grass is 3.20 kgf and 4.16 kgf in wet condition and 4.30kgf and 5.25 kgf in dry condition. The average of the elongation of sianik grass is longer than others i.e. 24.50 mm in wet condition and18.75 mm in dry condition. The elongation of teki grass is 9.05 mm in wet condition and 11.10 in dry condition. The average of linggi grasselongation is 12.20 mm in wet condition and 12.90 mm in dry condition. Based on the breaking strength and the elongation test, the resultshowed that sianik grass is the most potential natural fiber as fishing gear material.

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