Chiral separation of (d,l)-lactic acid through molecularly imprinted cellulose acetate composite membrane

Cellulose ◽  
2018 ◽  
Vol 25 (6) ◽  
pp. 3435-3448 ◽  
Author(s):  
Qiang Huang ◽  
Huichang Li ◽  
Tongtong Guo ◽  
Shujie Li ◽  
Guopeng Shen ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Cellulose Acetate ◽  
Composite Membrane ◽  
Chiral Separation ◽  
Molecularly Imprinted

scholarly journals Adsorptive molecularly imprinted composite membranes for chiral separation of phenylalanine

2016 ◽  
Vol 18 (3) ◽  
pp. 22-29 ◽  
Author(s):  
Nasrullah Shah ◽  
Touseef Rehan ◽  
Joong Kon Park
Keyword(s):  
Composite Membrane ◽  
Chiral Separation ◽  
Phase Inversion ◽  
Composite Membranes ◽  
Adsorption Selectivity ◽  
Molecularly Imprinted ◽  
Phase Inversion Technique ◽  
Uniform Dispersion ◽  
Polymeric Solutions ◽  
And Control

Abstract Two types of composite imprinted membranes, i.e., composite membrane comprised of D-Phe imprinted beads and D-Phe imprinted membrane or DCM and composite membrane comprised of L-Phe imprinted beads and L-Phe imprinted membranes or LCM, were synthesized by phase inversion technique after a uniform dispersion of beads within the polymeric solutions using simple physico-mechanical process. The assemblies of the prepared DCM, LCM and control membranes were employed in ultrafiltration for chiral separation of D, L-Phenylalanine racemate solution. DCM and LCM showed an improved adsorption capacity (0.334 mg g-1 and 0.365 mg g-1 respectively), and adsorption selectivity (2.72 and 2.98 respectively). However, the percent rejection of the template and counter enantiomer were lower than that of control membranes. Compared to control membrane, the DCM and LCM showed inverse permselectivity. These composite membranes having better adsorption and separation ability for Phenylalanine racemate solution will be suitable in the future for various other applications.

scholarly journals Preparation and characterization of electrospun fibers based on poly(L-lactic acid)/cellulose acetate

2012 ◽  
Vol 30 (6) ◽  
pp. 916-922 ◽  
Author(s):  
Jia-zi Hou ◽  
Xiao-ping Sun ◽  
Wan-xi Zhang ◽  
Li-li Li ◽  
Hong Teng
Keyword(s):  
Lactic Acid ◽  
Cellulose Acetate ◽  
Electrospun Fibers

Formation of Hydroxycarbonate Apatite Layer on Poly(Lactic Acid) Composites in Simulated Body Fluid

2005 ◽  
Vol 284-286 ◽  
pp. 489-492 ◽  
Author(s):  
Hirotaka Maeda ◽  
Toshihiro Kasuga ◽  
Masayuki Nogami
Keyword(s):  
Lactic Acid ◽  
Simulated Body Fluid ◽  
Zeta Potential ◽  
Calcium Chloride ◽  
Composite Membrane ◽  
Body Fluid ◽  
Poly Lactic Acid ◽  
Zeta Potentials ◽  
Carbonate Ion ◽  
Ft Ir

Hydroxycarbonate apatite (HCA), which formed on a poly(lactic acid) (PLA) composite membrane containing vaterite or calcium chloride after soaking in simulated body fluid, was examined to clarify the importance of the ceramic phases in the composites. FT-IR spectra showed that the ratio of CO3/PO4 in the infrared adsorption bands of HCA formed on the PLA composite containing vaterite was much larger than that of HCA formed on the PLA composite containing calcium chloride. Substitution of carbonate ion in hydroxyapatite is believed to be strongly influenced by ceramic phases in the composites. The zeta potentials of HCA formed on the PLA composite containing vaterite or calcium chloride was -6 mV or -17 mV, respectively. The zeta potential may be influenced by the amount of carbonate ion in hydroxyapatite.

scholarly journals Protein molecularly imprinted polysiloxane prepared using calcium silicate/calcium alginate composite membrane as the matrix

2018 ◽  
Vol 48 (7) ◽  
pp. 791-798
Author(s):  
Dong LIU ◽  
Meng QI ◽  
KongYin ZHAO ◽  
GuoQing XU ◽  
MengDi WU ◽  
...  
Keyword(s):  
Composite Membrane ◽  
Calcium Silicate ◽  
Calcium Alginate ◽  
Molecularly Imprinted ◽  
The Matrix
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