Separation of aqueous phenol through polyurethane membranes by pervaporation

Hoshi, Masaru; Kogure, Masao; Saitoh, Takanori; Nakagawa, Tsutomu

doi:10.1002/(sici)1097-4628(19970718)65:3<469::aid-app6>3.0.co;2-f

Cited by 46 publications

(7 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A membrane was prepared in the same way as in the previous work. 17,24 An ethylacetate solution containing 20 -30 wt % polyurethane was coated on an exfoliate-treated polyethyleneterephthalate (PET) film, and then dried at 100°C for 5 min. The polyurethane membrane was laminated with a porous polypropylene sheet (Celgard 2500), and the PET film was displaced with a porous polypropylene sheet.…”

Section: Membrane Preparationmentioning

confidence: 99%

“…31,32 Therefore, a diffusion coefficient that is calculated by the following equations is thought to be an apparent mean diffusion coefficient. 24,25 Figure 8 shows the influence of the methylene group length in poly(alkylene glycols) on the apparent mean diffusion coefficient of the phenol (D phenol ) and the water (D water ) that was calculated by eqs. (4), (5), and (6).…”

Section: Pervaporation and Sorption Measurementmentioning

confidence: 99%

“…In previous work, we have reported polyurethane membranes for the separation of phenol from dilute aqueous solutions. 24,25 The polyurethane, which was made from polytetramethyleneglycol (PTMG), showed a good phenol permselectivity. The phenol concentration in the permeate solution increased from 0 to 65 wt %, and the total flux also increased up to 930 g ⅐ m Ϫ2 ⅐ h Ϫ1 with increasing the feed concentration of phenol from 0 to 7 wt % for the polyurethane of 1,6hexamethylenediisocyanate (HMDI)-PTMG.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Separation of aqueous phenol through polyurethane membranes by pervaporation. III. Effect of the methylene group length in poly(alkylene glycols)

Hoshi¹,

Ieshige²,

Saitoh³

et al. 2000

J. Appl. Polym. Sci.

Self Cite

View full text Add to dashboard Cite

Separation of phenol from dilute aqueous solution through polyurethane membranes by pervaporation was investigated. The effect of the methylene group length in poly(alkylene glycols) on permselectivity and solubility of phenol was studied. The poly(alkylene glycols) were obtained by polycondensation of 1,6-hexanediol, 1,8-octanediol, and 1,10-decanediol with a sulfuric acid catalyst. Polyethyleneglycol and polytetramethyleneglycol were commercially available. Progress of the polymerization in the poly(alkylene glycols) was confirmed by FTIR, 1 H-NMR analysis, and SEC measurement. The polyurethanes were obtained by polyaddition reaction of 1,6-hexamethylenediisocyanate and the poly(alkylene glycol), and were confirmed by FTIR analysis and SEC measurement. The phenol concentration in a permeate liquid increased from 25.1 to 36.2 wt %, and the phenol partial flux also increased from 49.3 to 68.9 g ⅐ m Ϫ2 ⅐ h Ϫ1 with increasing the methylene group length in the poly(alkylene glycols), whereas the water partial flux slightly decreased. As a result of sorption measurements, the change in the degree of swelling was small, and the phenol concentration in the membrane increased from 42.1 to 70.8 wt %. The increase in the methylene group length of the poly(alkylene glycols) should contribute to an increase in the hydrophobicity of the polyurethane so that the solubility of phenol to the membrane should increase. The phenol concentration in the permeate liquid and the phenol partial flux increased with an increase in the methylene group length of the poly(alkylene glycols) due to the increase in the phenol solubility for the polyurethane membranes.

show abstract

Section: Membrane Preparationmentioning

confidence: 99%

Section: Pervaporation and Sorption Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Separation of aqueous phenol through polyurethane membranes by pervaporation. III. Effect of the methylene group length in poly(alkylene glycols)

Hoshi¹,

Ieshige²,

Saitoh³

et al. 2000

J. Appl. Polym. Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…diol, diamine) for mechanical strength, 15 and has been used to remove 1,1,1-trichloroethane, toluene, dichloromethane, and phenol from aqueous solutions. 15, [16][17][18][19] HTPB-based polyurethaneurea membranes have soft segment of polybutadiene (PB) and rigid segment of urea, which have been used earlier for separation of ethanol-water mixture 20,21 and gas mixtures. 22 None report for the esters-water mixtures, such as EA-water mixture, can be found.…”

Section: Introductionmentioning

confidence: 99%

HTPB‐based polyurethaneurea membranes for recovery of aroma compounds from aqueous solution by pervaporation

Bai

Qian

Yin

et al. 2007

J of Applied Polymer Sci

View full text Add to dashboard Cite

Hydroxyterminated polybutadiene (HTPB)-based polyurethaneurea (PU), HTPB-PU, was synthesized by two-step polymerization and was firstly used as membrane materials to recover aroma, ethyl acetate (EA), from aqueous solution by pervaporation (PV). The effects of the numberaverage molecular weight (M n ) of HTPB, EA in feed, operating temperature, and membrane thickness on the PV performance of HTPB-PU membranes were investigated. The membranes demonstrated high EA permselectivity as well as high EA flux. The DSC result showed two transition temperatures in the HTPB-PU membrane and contact angle measurements revealed the difference of hydrophobicity of the membrane at both sides, which were induced by glass plate and air, respectively, due to movement of the soft hydrophobic polybutadiene (PB) segments in HTPB-PU chains. Furthermore, the PV performance of the HTPB-PU membrane with the hydrophobic surface facing the feed was much better than that with the hydrophilic surface.

show abstract

“…In previous work, we have reported polyurethane membranes for the separation of phenol from dilute aqueous solutions 24, 25. The polyurethane, which was made from polytetramethyleneglycol (PTMG), showed a good phenol permselectivity.…”

Section: Introductionmentioning

confidence: 99%

Separation of aqueous phenol through polyurethane membranes by pervaporation. III. Effect of the methylene group length in poly(alkylene glycols)

Hoshi

Ieshige

Saitoh

et al. 2000

J. Appl. Polym. Sci.

Self Cite

View full text Add to dashboard Cite

Separation of phenol from dilute aqueous solution through polyurethane membranes by pervaporation was investigated. The effect of the methylene group length in poly(alkylene glycols) on permselectivity and solubility of phenol was studied. The poly(alkylene glycols) were obtained by polycondensation of 1,6‐hexanediol, 1,8‐octanediol, and 1,10‐decanediol with a sulfuric acid catalyst. Polyethyleneglycol and polytetramethyleneglycol were commercially available. Progress of the polymerization in the poly(alkylene glycols) was confirmed by FTIR, 1H‐NMR analysis, and SEC measurement. The polyurethanes were obtained by polyaddition reaction of 1,6‐hexamethylenediisocyanate and the poly(alkylene glycol), and were confirmed by FTIR analysis and SEC measurement. The phenol concentration in a permeate liquid increased from 25.1 to 36.2 wt %, and the phenol partial flux also increased from 49.3 to 68.9 g · m−2 · h−1 with increasing the methylene group length in the poly(alkylene glycols), whereas the water partial flux slightly decreased. As a result of sorption measurements, the change in the degree of swelling was small, and the phenol concentration in the membrane increased from 42.1 to 70.8 wt %. The increase in the methylene group length of the poly(alkylene glycols) should contribute to an increase in the hydrophobicity of the polyurethane so that the solubility of phenol to the membrane should increase. The phenol concentration in the permeate liquid and the phenol partial flux increased with an increase in the methylene group length of the poly(alkylene glycols) due to the increase in the phenol solubility for the polyurethane membranes. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 654–664, 2000

show abstract

Separation of aqueous phenol through polyurethane membranes by pervaporation

Cited by 46 publications

References 2 publications

Separation of aqueous phenol through polyurethane membranes by pervaporation. III. Effect of the methylene group length in poly(alkylene glycols)

Separation of aqueous phenol through polyurethane membranes by pervaporation. III. Effect of the methylene group length in poly(alkylene glycols)

HTPB‐based polyurethaneurea membranes for recovery of aroma compounds from aqueous solution by pervaporation

Separation of aqueous phenol through polyurethane membranes by pervaporation. III. Effect of the methylene group length in poly(alkylene glycols)

Contact Info

Product

Resources

About