Effects of alkali treatment duration on properties of Khlum fiber for application as a reinforcement material

Sarak, Sukanya; Boonsuk, Phetdaphat; Sukolrat, Apinya; Mayakun, Jaruwan; Kaewtatip, Kaewta

doi:10.1007/s13762-021-03302-5

Cited by 4 publications

(6 citation statements)

References 29 publications

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“…29,30 The temperature at maximum weight loss (T max ) values of the neat starch foam and KF-1h with 1 wt% loading were both 332 C. The T max of KF-1h with 7 wt% loading was 335 C. These results suggest that KF-1 h effectively improved the thermal stability of starch foam since, KF-1h exhibited high thermal stability (358 C). 15 Starch foam suffers from a lack of water resistance and can collapse when in contact with water, or exhibit low dimensional stability in an atmosphere with high relative humidity. The hydrophilicity of starch is a result of the numerous free hydroxyl groups in starch polymer molecules, which can form hydrogen bonds with surrounding moisture.…”

Section: Resultsmentioning

confidence: 99%

“…As described in our previous work, 15 KF was treated with a 2.5 M NaOH solution at a weight: volume ratio of 1:20, for 1 h under mechanical stirring at 80°C, and labeled KF‐1h. After treatment, the fibers were washed with distilled water until the pH of the material became neutral.…”

Section: Methodsmentioning

confidence: 99%

“…The good adhesion between the fiber and the wheat gluten matrix enabled a more effective transfer of stress from the matrix to the reinforcing material and also reduced water absorption into the matrix. In the present work, Khlum fiber waste was treated with 2.5 M NaOH for 1 h at 80°C and used as a reinforcement material to improve the properties of the starch polymer composite due to treated Khlum fiber has higher thermal stability (358°C) than the other treated fibers, for example, treated Borassus fruit fine fibers (325°C), treated rice husk (300°C), and treated Phoenix pusilla leaves (219°C) 15–18 . Moreover, treated Khlum fiber had high degree of crystallinity (43.18%) and small diameter (12.40 μm).…”

Section: Introductionmentioning

confidence: 99%

“…In previous works, 14,15 we successfully treated oil palm empty fruit bunch fiber and Khlum fiber waste with an alkaline process. The tensile strength and water absorption of wheat gluten composites reinforced with treated oil palm empty fruit bunch fiber were compared with the same properties of composites reinforced with unmodified fiber.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Preparation and characterization of biodegradable starch foam composite with treated Khlum fiber for food packaging

Kaewtatip

Saepoo

Sarak

et al. 2023

J of Applied Polymer Sci

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Starch foam is a completely biodegradable material that can replace petroleum‐based foams. However, starch foams are sensitive to water and have poor mechanical properties. Khlum fiber that had been alkali‐treated for 1 h (KF‐1h) showed excellent properties as a reinforcement of starch foam. KF‐1h was added to starch at loadings of 0, 1, 3, 5, and 7 wt%. The starch foam composite reinforced with 1 wt% of KF‐1h presented uniformly distributed cells of uniform size, and produced the highest values for flexural stress at maximum load (3.43 MPa), hardness (92.50), and water contact angle (122°) of the studied foams. The modulus of the starch foam composite increased with increments of KF‐1h content but the density and color of the starch foam and the biodegradation process in soil were only slightly affected. This work also demonstrated a practical application of the proposed starch foam composite as a biodegradable food container.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Preparation and characterization of biodegradable starch foam composite with treated Khlum fiber for food packaging

Kaewtatip

Saepoo

Sarak

et al. 2023

J of Applied Polymer Sci

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“…19 Alkali treatment is one of most widely used methods for fiber modification, among which sodium hydroxide (NaOH) is a desirable candidate to remove weak components such as lignin on the surface of natural fibers, improve the surface roughness of natural fibers, and thus enhance the adhesion with the resin matrix. [20][21][22] Plasma processing requires the fibers to be in a low vacuum chamber, and then gas is introduced into the chamber and ionized to produce plasma. The gases, including oxygen, nitrogen, helium, and air, impinge on the surface of the fiber, causing physical and chemical changes of the fiber structure.…”

mentioning

confidence: 99%

Natural jute fiber treated with silane coupling agent KH570 reinforced polylactic acid composites: mechanical and thermal properties

Fang

Song

Zou

et al. 2022

Textile Research Journal

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With the progress of society, fiber reinforced composites have become the subject of research in the field of composite materials, in which natural fibers are widely used in the enhancement and modification of thermoplastics due to their low density, biodegradation and most wide origins. However, the hydrophilicity of special fiber is the main factor that hinders its bonding with hydrophobic polymer matrix which leads to poor interface compatibility between the fiber/matrix interface. The coupling agent can increase the nonpolarity of the natural fiber and the compatibility between the fiber and the resin. In this study, the composites were fabricated by the film stacking method, and the surface of jute fiber was treated with silane coupling agent so as to prepare jute/polylactic acid composites with good mechanical and thermal properties. The mechanical and thermomechanical results show that the combination of the coupling agent can significantly improve the interfacial bond of the jute/polylactic acid composites, leading to an efficient enhancement of comprehensive performance.

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Optimization and characterization of cellulose extraction from olive pomace

Han

Geng

2023

Cellulose

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Olive pomace (OP) was used as raw material to extract cellulose by multi-step chemical method, and the extracted cellulose was characterized. The two steps of alkali treatment (alkali concentration, reaction time and reaction temperature) and bleaching (H 2 O 2 concentration, NaOH concentration, bleaching time and bleaching temperature) were optimized. The results showed that the optimum conditions for alkali treatment were as follows: alkali concentration 6%, reaction time 2 h, reaction temperature 95°C; the optimal bleaching conditions were as follows: 7.5% H 2 O 2 solution, 5% NaOH, bleaching time 2 h, bleaching temperature 75°C. After multi-step chemical treatment, the cellulose content of the nal OP cellulose was (86.41 ± 0.27) %, the lignin content was (6.77 ± 0.55) %, the extraction process yield was 20.36%. By scanning electron microscopy, the surface of OP cellulose changes from dense smooth structure to rough irregular structure with different treatment degrees. Fourier transform infrared spectroscopy (FTIR) proved the removal of hemicellulose and lignin in OP bers after chemical treatment. The crystallinity of OP ber increased from 34.80-68.69% after treatment. Thermogravimetric analysis (TGA) showed that OP cellulose had high thermal stability. The study provides a new idea for the conversion of industrial processing by-products into high-quality cellulose, and proves that it is feasible to extract cellulose from olive pomace.

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Effects of alkali treatment duration on properties of Khlum fiber for application as a reinforcement material

Cited by 4 publications

References 29 publications

Preparation and characterization of biodegradable starch foam composite with treated Khlum fiber for food packaging

Preparation and characterization of biodegradable starch foam composite with treated Khlum fiber for food packaging

Natural jute fiber treated with silane coupling agent KH570 reinforced polylactic acid composites: mechanical and thermal properties

Optimization and characterization of cellulose extraction from olive pomace

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