Synthesis and properties of novel superabsorbent hydrogels with mechanically activated sugarcane bagasse and acrylic acid

Liang, Xingtang; Huang, Zuqiang; Zhang, Yanjuan; Hu, Huayu; Liu, Zijie

doi:10.1007/s00289-013-0921-4

Cited by 27 publications

(15 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mechanical modification of plant fibers is another way of increasing the degree of gel swelling. In fact, the mechanical activation affects the destruction of a molecular lignin structure and an increasing of active sites in the cellulose throughout destruction of its crystalline structure (Huang et al, 2009;Liang et al, 2013). Similarly, Liang et al (2013), found that increasing the mechanical modification time, increases the degree of swelling of a synthesized hydrogel from sugar cane bagasse and acrylic acid.…”

Section: Modifying Methods Of Natural Fibers For Hydrogels Productionmentioning

confidence: 99%

“…These modifications increase the water absorption and retention capacity throughout an interaction with modifying agents and active sites generation (Liang et al, 2013;R. F. Rodrigues, Trevenzoli, Santos, Leão & Botaro, 2006)avaliou-se a capacidade da madeira Paraju (Manilkara longifolia.…”

Section: Modifying Methods Of Natural Fibers For Hydrogels Productionmentioning

confidence: 99%

“…Mechanical modification with high energy mill Increased swelling capacity of the hydrogel for longer mechanical activation time. Liang et al, 2013 Kapoc fiber Pretreatment with NaClO 2 at 1% pretreatment temperature: 70-80°C Time: 1hour Does not apply…”

Section: Modifying Methods Of Natural Fibers For Hydrogels Productionmentioning

confidence: 99%

“…Swelling ability free and in saline solutions (Wen et al, 2015) In the study reported in Table 3, Liang et al (2013), showed the swelling is modified by the effect of pH change, the presence of salts (NaCl and CaCl 2 ) and temperature. In acidic media, the presence of hydronium ions interacts with the hydroxyl groups of cellulose chain, generating a greater presence of hydrogen linking forces, increasing the chain cross-links and a decreasing in the absorption capacity.…”

Section: Reactor: Beakermentioning

confidence: 99%

“…Hydrogels are polymers which have a three-dimensional cross-linked structure that allows them to absorb, store and release water molecules (Mohan, Murthy & Raju, 2006;Pourjavadi & Mahdavinia, 2006). Among the most important applications are as follows: manufacture of personal hygiene products, medical (Arredondo, 2009), environmental (heavy metals removal) (OrozcoGuareno, Hernandez, Gomez-Salazar, Mendizabal & Katime, 2011) and agriculture (Cortés et al, 2007;Liang, Huang, Zhang, Hu & Liu, 2013). The most important agricultural areas are gardening, horticulture and silviculture, respectively (Journal the Business, 2015;Vundavalli, Vundavalli, Nakka & Rao, 2015).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Natural fibers for hydrogels production and their applications in agriculture

Serna-Cock¹,

Guancha-Chalapud²

2017

Acta Agron.

View full text Add to dashboard Cite

This paper presents a review on hydrogels applied to agriculture emphasizing on the use of natural fibers. The objectives were to examine, trends in research addressed to identify natural fibers used in hydrogels development and methods for modifying natural fibers, understand factors which determine the water retention capacity of a hydrogel. Consequently, this paper shows some methodologies used to evaluate the hydrogels efficiency and to collect in tables, relevant information in relation to methods of natural fibers modification and hydrogel synthesis. It was found that previous research focused on hydrogels development processed with biodegradable polymers such as starch, chitosan and modified natural fibers, cross-linked with potassium acrylate and acrylamide, respectively. In addition, current researches aimed to obtaining hydrogels with improved properties, which have allowed a resistance to climatic variations and soil physicochemical changes, such as pH, presence of salts, temperature and composition. In fact, natural fibers such as sugarcane, agave fiber and kapok fiber, modified with maleic anhydride, are an alternative to obtain hydrogels due to an increasing of mechanical properties and chemically active sites. However, the use of natural nanofibers in hydrogels, has been a successful proposal to improve hydrogels mechanical and swelling properties, since they give to material an elasticity and rigidity properties. A hydrogel efficiency applied to soil, is measured throughout properties as swellability, mechanical strength, and soil water retention. It was concluded that hydrogels, are an alternative to the current needs for the agricultural sector.Key words: Hydrogels, methods of modifying fiber, nanofibers, superabsorbent, water retention capacity. ResumenEn el presente artículo se presenta una revisión de literatura sobre hidrogeles aplicados a la agricultura, haciéndose mayor énfasis en el uso de fibras vegetales. Los objetivos fueron examinar las tendencias en la investigación, identificar las fibras naturales utilizadas en el desarrollo de hidrogeles, mostrar los métodos de modificación de fibras naturales para la elaboración de hidrogeles, entender los factores que determinan la capacidad de retención de agua de un hidrogel, mostrar algunas metodologías empleadas para evaluar la eficiencia de un hidrogel y recopilar en tablas, información relevante en relación a métodos de modificación de fibras naturales y de síntesis de hidrogeles. Se encontró que las investigaciones se orientan al desarrollo de hidrogeles elaborados a bases de polímeros biodegradables como almidón, quitosano y fibras vegetales modificadas, entrecruzadas con acrilato de potasio y acrilamida. Además, las investigaciones apuntan a la obtención de hidrogeles con propiedades mejoradas, que permitan resistir las variaciones climáticas y los cambios fisicoquímicos del suelo como el pH, la presencia de sales, temperatura y composición. Fibras naturales como caña de azúcar, fibra de agave y fibra de kapoc, modificadas con ...

show abstract

Section: Modifying Methods Of Natural Fibers For Hydrogels Productionmentioning

confidence: 99%

Section: Modifying Methods Of Natural Fibers For Hydrogels Productionmentioning

confidence: 99%

Section: Modifying Methods Of Natural Fibers For Hydrogels Productionmentioning

confidence: 99%

Section: Reactor: Beakermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Natural fibers for hydrogels production and their applications in agriculture

Serna-Cock¹,

Guancha-Chalapud²

2017

Acta Agron.

View full text Add to dashboard Cite

show abstract

Effect of pre-treatment of sugarcane bagasse on the cellulose solution and application for the cellulose hydrogel films

Nakasone

Kobayashi

2016

Polym. Adv. Technol.

View full text Add to dashboard Cite

Sugarcane bagasse was used as a cellulose resource, and the transparent cellulose hydrogel films were obtained from the purified cellulose by phase inversion process without chemical cross-linking, when the dissolved cellulose in lithium chloride/N,N-dimethyl acetamide was transformed into the solid film. On these processes, bagasse was pre-treated by 10 wt% sodium hydroxide in the absence and presence of bleaching of 10 vol% sodium hypochlorite (NaOCl) solution in order to obtain cellulose fibers. Here, the bleaching temperature was varied from 40 to 50°C. The effect of pre-treatment conditions on the resultant cellulose solution and hydrogel films was investigated. It was seen that strong bleaching removed most of lignin component from the bagasse. However, viscosity and size exclusion chromatogram of the cellulose indicated that this operation decreased average molecular weight of the cellulose fibers from 2.1 × 10 6 to 4.8 × 10 5 . These property changes of fibers also caused increase of water content and weakening of mechanical strength of the resultant hydrogels. In addition, scanning probe microscopy in wet state revealed that the porous fiber network structure in the hydrogel was greatly influenced by bleaching with NaOCl. The average pore size of fiber network was decreased from 8.1 to 5.9 nm as the NaOCl treatment was at 50°C, because of expanded fibers in the swollen hydrogel.

show abstract

Study on swelling behavior of poly(sodium acrylate-co-2-acryloylamino-2-methyl-1-propanesulfonic acid)/attapulgite macroporous superabsorbent composite

Liu

Chen

2014

Polym Eng Sci

View full text Add to dashboard Cite

A fast swelling sulfonic acid macroporous superabsorbent composite is prepared by copolymerization of partially neutralized acrylic acid, 2‐acryloylamino‐2‐methyl‐1‐propanesulfonic acid, and attapulgite. The effects of pH values, ions, and their concentration on swelling behavior of sample are investigated. The results show that the swelling behavior of sample is affected by pH value. The supercase Π diffusion is observed in all NaCl solutions with different pH value. An overshooting effect appears in all solutions containing multivalent cations. This phenomenon may be attributed to the reorganization of the gel structure due to the formation of complex compound between cation and polymer network. A quantitative kinetics model proposed by Díez‐Peña is used to interprete it and the theoretical curves are in good agreement with the experimental data. For anions, it shows little effect on swelling process, and supercase Π diffusion is also observed no matter which kind of anion exists in swelling medium. POLYM. ENG. SCI., 55:681–687, 2015. © 2014 Society of Plastics Engineers

show abstract

Synthesis and properties of novel superabsorbent hydrogels with mechanically activated sugarcane bagasse and acrylic acid

Cited by 27 publications

References 32 publications

Natural fibers for hydrogels production and their applications in agriculture

Natural fibers for hydrogels production and their applications in agriculture

Effect of pre-treatment of sugarcane bagasse on the cellulose solution and application for the cellulose hydrogel films

Study on swelling behavior of poly(sodium acrylate-co-2-acryloylamino-2-methyl-1-propanesulfonic acid)/attapulgite macroporous superabsorbent composite

Contact Info

Product

Resources

About