Poly(lactic acid)/activated carbon composite beads by phase inversion method for kinetic and adsorption studies of Pb2+ ions in aqueous solution

2019 ◽  
Vol 146 ◽  
pp. 227-235
Author(s):  
Memoon Sattar ◽  
Fareeda Hayeeye ◽  
Watchanida Chinpa ◽  
Orawan Sirichote
Keyword(s):  
Aqueous Solution ◽  
Lactic Acid ◽  
Activated Carbon ◽  
Phase Inversion ◽  
Carbon Composite ◽  
Poly Lactic Acid ◽  
Inversion Method ◽  
Adsorption Studies ◽  
Composite Beads ◽  
Phase Inversion Method

Preparation of Uniform Microcapsules Containing Ionic Liquid for Caprolactam Extraction

2012 ◽  
Vol 557-559 ◽  
pp. 619-623 ◽  
Author(s):  
Dong Xuan Chen ◽  
Xiao Kun OuYang ◽  
Yang Guang Wang ◽  
Li Ye Yang ◽  
Di Yu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Particle Size ◽  
Ionic Liquid ◽  
Phase Inversion ◽  
Extraction Process ◽  
Inversion Method ◽  
Nitrogen Gas ◽  
Thermogravimetric Analyzer ◽  
Particle Size Analyzer ◽  
Phase Inversion Method

Microencapsulating ionic liquid is an effective way to overcome the loss of ionic liquid in the extraction process. A phase inversion method was used to form microcapsules containing 1-butyl-3-methylimidazolium hexafluorophosphate [BMIM] [PF6]. The oil phase, composed of [BMIM][PF6], polysulfone and dichloromethane, was dropped into the 0.2 wt% gelatin aqueous solution using nitrogen gas pressure to form droplets. As dichloromethane evaporated completely, polysulfone microcapsules containing [BMIM] [PF6] were obtained. The microcapsules were characterized using a polarizing microscope, a laser particle size analyzer and a thermogravimetric analyzer. Moreover the microcapsules were performed some effect on caprolactam extraction from water.

Structure and Properties of Chitosan/Poly-Lactic Acid Blend Scaffold and Chitosan Powder/Poly-Lactic Acid Blend Scaffold

2013 ◽  
Vol 647 ◽  
pp. 9-15
Author(s):  
Dan Ying Zuo ◽  
Hong Jun Li
Keyword(s):  
Lactic Acid ◽  
Cross Section ◽  
Poly Lactic Acid ◽  
Inversion Method ◽  
Plla Scaffold ◽  
The Difference ◽  
Phase Separation Behavior ◽  
Phase Inversion Method ◽  
Precipitation Phase ◽  
Chitosan Powder

The chitosan (CS) /poly-L-lactic (PLLA) acid blend scaffolds were prepared by two kinds of blend solutions through immersion precipitation phase inversion method. CS/PLLA blend scaffold was fabricated by mixing the CS-HAc solution and PLLA-DMF solution, CSP/PLLA blend scaffold was fabricated by mixing chitosan powder (CSP) and PLLA-DMF solution. The results revealed that CS content in CSP/PLLA scaffold was 126 times higher than that in CS/PLLA scaffold. The difference of CS content made the structures of CS/PLLA scaffold and CSP/PLLA scaffold exhibit an obvious discrepancy, which resulted from the different thermodynamics and phase separation behavior of two blend solutions. CS/PLLA scaffold with a higher porosity took on an unsymmetrical structure with a compact upper surface and a porous cross-section containing the fingerlike macrovoids, while CSP/PLLA scaffold displayed a symmetrical structure with a porous upper surface and the sponge-like cross-section. WVTR and equilibrium swelling of CSP/PLLA blend scaffold were higher than that of CS/PLLA blend scaffold. WAXD analysis revealed that PLLA and CS did not crystallize in the course of CS/PLLA scaffold formation, while there were the diffraction peaks of PLLA and CS in the CSP/PLLA scaffold.

Removal of Fe (II) from Aqueous Solution by Chitosan Activated Carbon Composite Beads

2020 ◽  
Vol 898 ◽  
pp. 3-8
Author(s):  
Putri Wulan ◽  
Yuni Kusumastuti ◽  
Agus Prasetya
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Metal Ion ◽  
Adsorption Process ◽  
Chitosan Solution ◽  
Carbon Composite ◽  
Composite Beads ◽  
Naoh Solution ◽  
Adsorbent Dose

The high levels of Fe2+ metal ion in water can be reduced by adsorption process. The adsorbent used is a composite of chitosan activated carbon. The composites were prepared by adding 1.5 g of activated carbon into chitosan solution 1.5% (w/v). The gels of chitosan activated carbon were then dropped into a 2.8% NaOH solution mixture to produce composite beads. The beads were neutralized using aquadest and dried in an oven at 50oC for 2 hours. The dried bead was used as adsorbent. The adsorption process was carried out with erlenmeyer in shaker bath with 0.5 g, 1 g, and 1.5 g at 25oC, 35oC and 45oC in 50 mL solution of Fe2+ metal ion having concentration of 10 ppm. Sample were taken in 5, 10, 20, 40 60, 80 and 120 min. Adsorbent were characterized by SEM and EDX. The composite beads adsorbent was analyzed by SEM and EDX. SEM results show that chitosan was successfully coated on activated carbon with a porous surface structure. The EDX results show that chitosan activated carbon composite beads can absorb Fe2+ metal ions, with an adsorption capacity of 88.3% at 60 min in 1.5 g adsorbent dose.

Poly(Lactic Acid)-Polybutylene Succinate-Activated Carbon Composite Foams

2017 ◽  
Vol 751 ◽  
pp. 344-349 ◽  
Author(s):  
Kittimasak Ketkul ◽  
Poonsub Threepopnatkul ◽  
Darunee Aussawasathien ◽  
Kittipong Hrimchum
Keyword(s):  
Tensile Strength ◽  
Lactic Acid ◽  
Activated Carbon ◽  
Void Fraction ◽  
Extrusion Process ◽  
Carbon Composite ◽  
Poly Lactic Acid ◽  
Composite Foam ◽  
Composite Foams ◽  
Polybutylene Succinate

Polymer blends of poly (lactic acid) (PLA) and polybutylene succinate (PBS) containing activated carbon (AC) were foamed by using Azodicarbonamide (ADC) through an extrusion process. The composite foams containing 5 phr of AC had lower density than those without AC loading for PLA:PBS ratios of 90:10, 80:20, 70:30, and 60:40. The incident of higher void fraction was the consequences of more foaming nucleation centers which were induced by adding AC in the composite foam. Maximum reduction of density by 50% with the void fraction of 50% was achieved when both ADC and AC were applied at 5 phr with the PLA:PBS ratio of 80:20. The addition of AC in composite foams enhanced the crystallization in PBS phase but had no effects on PLA crystallinity. The thermal stability of composite foams with and without AC dosages for each PLA:PBS proportion was slightly changed. For PLA-PBS blend foams, the more PLA loading there was the more tensile strength and modulus there would be. For PLA-PBS-AC composite foams, AC could improve the modulus and tensile strength of composite foams in PBS-rich samples whereas no effect on PLA-rich samples.

scholarly journals Porous ZIF-8@polyacrylonitrile composite beads for iodine capture

RSC Advances ◽  
2021 ◽  
Vol 11 (48) ◽  
pp. 30259-30269
Author(s):  
Qiang Yu ◽  
Xiaohui Jiang ◽  
Zhengjun Cheng ◽  
Yunwen Liao ◽  
Ming Duan
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Phase Inversion ◽  
High Specific Surface Area ◽  
Inversion Method ◽  
Composite Beads ◽  
Phase Inversion Method

This article reports the preparation of a series of millimeter-sized ZIF-8@polyacrylonitrile composite beads with high specific surface area and porosity by the phase inversion method for iodine capture.

A straight, open and macro-porous fuel electrode-supported protonic ceramic electrochemical cell

2021 ◽  
Author(s):  
Yuxin Pan ◽  
Kai Pei ◽  
Yucun Zhou ◽  
Tong Liu ◽  
Meilin Liu ◽  
...  
Keyword(s):  
Phase Inversion ◽  
Electrochemical Cell ◽  
Inversion Method ◽  
Phase Inversion Method

A straight, open and macro-porous Ni–BaZr0.1Ce0.7Y0.1Yb0.1O3 fuel electrode-supported protonic ceramic electrochemical cell has been fabricated by a modified phase-inversion method.

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