Carboxymethyl konjac glucomannan mechanically reinforcing gellan gum microspheres for uranium removal

Crosslinked Carboxymethyl Konjac Glucomannan(CMKGM) with substitution degrees ofcarboxymethyl group（DS）0.265, 0.457 and 0.586 were prepared through reaction of monochloroacetic acid, konjac glucomannan(KGM) and epichlorohydrin and used to adsorb Cu(II) from the aqueous solutions of copper nitrate. The effects of pH, adsorbent dose, initial concentration of Cu(II), adsorption time and temperature on adsorption capacity were investigated. The results showed that adsorption capacity increased with an increasing DS of the carboxymethyl groups. Equilibrium adsorption time was 20 min or so and was independent on DS. The adsorption followed Langmuir isotherm equation. Ligand ion adsorption between carboxymethyl group and Cu(II) was thought to be predominate in the process of adsorption according to the relationship between DS and thermodynamic parameters. CMKGM can be used as cheaper and more effective adsorbents.

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Carboxymethyl konjac glucomannan - crosslinked chitosan sponges for wound dressing

International Journal of Biological Macromolecules ◽

10.1016/j.ijbiomac.2018.02.075 ◽

2018 ◽

Vol 112 ◽

pp. 1225-1233 ◽

Cited By ~ 25

Author(s):

Yu Xie ◽

Zeng-xing Yi ◽

Jian-xun Wang ◽

Tong-gang Hou ◽

Qiong Jiang

Keyword(s):

Wound Dressing ◽

Konjac Glucomannan ◽

Crosslinked Chitosan ◽

Carboxymethyl Konjac Glucomannan

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Adsorption of phosphorus from slaughterhouse wastewater by carboxymethyl konjac glucomannan loaded with lanthanum

International Journal of Biological Macromolecules ◽

10.1016/j.ijbiomac.2018.07.140 ◽

2018 ◽

Vol 119 ◽

pp. 105-115 ◽

Cited By ~ 18

Author(s):

Xiaonuo Zhang ◽

Xiaoyan Lin ◽

Yu He ◽

Yan Chen ◽

Jian Zhou ◽

...

Keyword(s):

Konjac Glucomannan ◽

Slaughterhouse Wastewater ◽

Carboxymethyl Konjac Glucomannan

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Adsorption behavior of carboxymethyl konjac glucomannan microspheres for fluoride from aqueous solution

RSC Advances ◽

10.1039/c6ra17183d ◽

2016 ◽

Vol 6 (92) ◽

pp. 89417-89429 ◽

Cited By ~ 5

Author(s):

Liping Wu ◽

Xiaoyan Lin ◽

Jiajie Wu ◽

Xingbao Zhou ◽

Xuegang Luo

Keyword(s):

Aqueous Solution ◽

Electrostatic Interaction ◽

Adsorption Mechanism ◽

Konjac Glucomannan ◽

Adsorption Behavior ◽

Schematic Diagram ◽

Carboxymethyl Konjac Glucomannan ◽

Coordination Reaction

The CMKGM–La–Al is characterized by SEM, EDX, and XPS. We find that adsorption mechanism of the adsorbent involved coordination reaction and electrostatic interaction. The schematic diagram of preparation of CMKGM–La–Al is shown as above.

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Rheological and DSC studies of mixtures of gellan gum and konjac glucomannan

Macromolecular Symposia ◽

10.1002/masy.19971200127 ◽

1997 ◽

Vol 120 (1) ◽

pp. 271-280 ◽

Cited By ~ 7

Author(s):

Emako Miyoshi ◽

Tomohisa Takaya ◽

Katsuyoshi Nishinari ◽

Peter A. Williams

Keyword(s):

Konjac Glucomannan ◽

Gellan Gum ◽

Dsc Studies

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Researches on the Properties of Stearate-Carboxymethyl Konjac Glucomannan Ester Prepared by Microwave Method

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.295-297.117 ◽

2011 ◽

Vol 295-297 ◽

pp. 117-125

Author(s):

Xiao Man Zeng ◽

Bei Yu Liu ◽

Jian Wang ◽

Geng Zhong ◽

Yu Hong Xia

Keyword(s):

Ambient Temperature ◽

Microwave Heating ◽

Chemical Properties ◽

Konjac Glucomannan ◽

Microwave Method ◽

Physico Chemical ◽

Substitution Degree ◽

Oil Water ◽

Carboxymethyl Konjac Glucomannan ◽

Thermal Stable

In this study, microwave heating was used for the preparation of stearate-carboxymethyl konjac glucomannan ester (SCMK), which introduced hydrophilic carboxymethyl and hydrophobic stearate groups on konjac glucomannan (KMG) backbone. The physico-chemical properties and structure of SCMK were investigated. Results show that the viscosity of SCMK is much lower than that of KGM, but larger slightly than the carboxymethyl konjac glucomannan (CMK) and the viscosity is still stable after being placed for 48 h at ambient temperature. Its transmittance decreases and the resistance ability of SCMK solution to salt/sugar as well as base have been significantly promoted. Moreover, SCMK with substitution degree (DS) of 0.02 is proved to be a sound oil/water emulsifier which its HLB value is 13.01. In FTIR spectrum, the absorption peak of SCMK decreases at 2161.84 cm-1 and 2360.74 cm-1. Meanwhile, TGA indicates that SCMK is less thermal stable than KGM and CMK, but is still good.

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Preparation and In Vitro Evaluation of Carboxymethyl Konjac Glucomannan Coated 5-Aminosalicylic Acid Tablets for Colonic Delivery

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.152-153.1712 ◽

2010 ◽

Vol 152-153 ◽

pp. 1712-1715 ◽

Cited By ~ 3

Author(s):

Xiao Yan Long ◽

Xue Gang Luo ◽

Neng Wu Zou ◽

Yong Hong Ma

Keyword(s):

Konjac Glucomannan ◽

Viscosity Measurement ◽

Simulation Environment ◽

Aminosalicylic Acid ◽

Colonic Delivery ◽

Buffer Solutions ◽

Lower Viscosity ◽

Potential Use ◽

Carboxymethyl Konjac Glucomannan

Konjac Glucomannan(KGM) was denatured by Carboxylmethylation to prepare Carboxymethyl konjac glucomannan(CMKGM) as coating material of 5-aminosalicylic acid(5-ASA) tablets. The 5-ASA release properties of the tablets were measured in vitro in the gastrointestinal tract simulation environment and in buffer solutions with β-mannase of pH 6.8 at 37 ± 0.5 degrees. The properties of the CMKGM were analyzed by FTIR spectra, viscosity measurement and swelling measurement. The integrality of the 5-ASA was investigated by ultraviolet spectrometry. The viscosity and swelling showed that CMKGM has lower swelling and lower viscosity compared to KGM. 5-ASA was released least in stimulating gastric environment and in pH 6.8 phosphate buffers,while the preparation was fast released in pH 6.8 phosphate buffers with β-mannase. The preparation was released 14% after 4 hours in pH 6.8 phosphate buffers , at the same time the preparation in pH 6.8 phosphate buffers with 0.2u ml-1 β-mannase was released 97% in 12 hours.The results suggested that CMKGM may be a useful carrier of 5 –ASA for colon-specific delivery. It has a potential use for advanced controlled release.

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