scholarly journals Deduction of Surfactants Effect on Performance, Morphology, Thermal and Molecular Properties of Polymeric Polyvinylidene Fluoride (PVDF) Based Ultrafiltration Membrane

2018 ◽  
Vol 63 (1) ◽  
pp. 27-35 ◽  
Author(s):  
Nurul Hannan Mohd Safari ◽  
Abdul Rahman Hassan ◽  
Che Wan Insyirah Che Wan Takwa ◽  
Sabariah Rozali
Keyword(s):  
Polyvinylidene Fluoride ◽  
Sodium Dodecyl ◽  
Tween 80 ◽  
Permeate Flux ◽  
Cross Sectional ◽  
Membrane Pores ◽  
Surfactant Material ◽  
Uf Membranes ◽  
Pore Properties ◽  
Triton X

In membrane making, surfactant material is one of the effective strategies to produce membrane / thin film with optimal and specific properties. This paper addressed the effect of Sodium dodecyl sulphate (SDS), Triton X-100 and Tween 80 as additives for the making of Polyvinylidene fluoride (PVDF) ultrafiltration (UF) membranes. The fabricated membranes were analysed in the aspect of performance, morphological structures, thermal properties and molecular orientation. Analysis results showed that the surfactant additives enhanced the membrane performance and properties. Surprisingly, the addition of 2 wt% surfactant increased the permeate flux of bovine serum albumin (BSA) up to 78.14 L/m2h compared to membrane without surfactant with flux at only 2.74 L/m2h. In addition, the role of surfactants on membrane pores and pore properties of PVDF UF membranes were examined. The cross-sectional morphological structures showed that these surfactants led towards the formation of macro-voids and finger-like structures as well as a spongy layer. The surfactants additives also improved the membrane pores and pore properties which reflect to the protein rejection up to 85 % and 78 % of BSA and egg albumin (EA), respectively. Moreover, analysis on the thermal features found that SDS, Triton X-100 and Tween 80 promoted better thermal stability and significantly fine molecular alignment which provided the versatility for the membrane to be used for any applications.

scholarly journals Characterization on Performance, Morphologies and Molecular Properties of Dual-Surfactants Based Polyvinylidene Fluoride Ultrafiltration Membranes

2019 ◽  
Vol 64 (3) ◽  
pp. 320-327
Author(s):  
Abdul Rahman Hassan ◽  
Che Wan Insyirah Che Wan Takwa ◽  
Nurul Hannan Mohd Safari ◽  
Sabariah Rozali ◽  
Nor Azirah Sulaiman
Keyword(s):  
Polyvinylidene Fluoride ◽  
Sodium Dodecyl ◽  
Tween 80 ◽  
Molecular Properties ◽  
Permeate Flux ◽  
Ultrafiltration Membranes ◽  
Membrane Performance ◽  
Phase Inversion Technique ◽  
Uf Membranes ◽  
Triton X

This paper addressed the pioneering work on the effects of dual surfactants component on the performance, morphologies and molecular properties of polyvinylidene fluoride/polyether glycol (PVDF/PEG 200) ultrafiltration (UF) membranes. The PVDF surfactant membranes were prepared via dry/wet via phase inversion technique with the addition of sodium dodecyl sulfate (SDS)/Tween 80 and Triton X-100/Tween 80 into polymer solution. Experimental data revealed that the dual surfactants improved the membrane performance up to 120.84 L/m2 × h and 82 % of permeate flux and rejection of bovine serum albumin, respectively. In addition, 2 wt% of dual surfactants alsofound to induce the growth of fine finger-like and macro-voids cavities inside the membranes while the FTIR spectra proved that the existence of dual surfactants in PVDF membranes produced better molecular alignment which contributed significantly towards better flux and good rejection. In conclusion, the used of dual surfactants in the PVDF ultrafiltration membranes improved the performance-properties of the membranes and extending the possibly versatile for the membrane to be used for more applications.

Micellar-enhanced ultrafiltration of copper ions using sodium dodecyl sulfate and its mixture with Brij 35, Tween 80 and Triton X-100

2013 ◽  
Vol 67 (10) ◽  
pp. 2154-2159 ◽  
Author(s):  
Baowei Zhao ◽  
Ruirui Li ◽  
Jinkui Zhong ◽  
Li Zhang
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Nonionic Surfactant ◽  
Sodium Dodecyl ◽  
Tween 80 ◽  
Molar Ratio ◽  
Permeate Flux ◽  
Brij 35 ◽  
Dodecyl Sulfate ◽  
Micellar Enhanced Ultrafiltration ◽  
Triton X

The performance of copper ion removal using sodium dodecyl sulfate (SDS) and its mixtures with Brij 35, Tween 80 (TW80) and Triton X-100 (TX100) by micellar-enhanced ultrafiltration (MEUF) was investigated. The effects of the molar ratio of nonionic surfactant to SDS on the critical micelle concentration (CMC) of SDS/Brij 35, SDS/TW80 and SDS/TX100, the removal efficiency of Cu2+, the residual concentration of SDS in the permeate solution and the permeate flux were tested. The results showed that the CMCs of the mixed surfactants were sharply less than that of pure SDS. The removal efficiencies of Cu2+ were up to the maximum values 98.3 and 95.8% when the molar ratios of Brij 35 and TW80 to SDS were 0.3, and it was 93.5% given 0.7 molar ratio of TX100 to SDS. The concentration of SDS in the permeate decreased dramatically with the addition of nonionic surfactant, and the permeate flux decreased slightly as the molar ratio increased. Compared with the performance by single SDS, the mixed SDS/Brij 35, SDS/TW80 and SDS/TX100 at an optimum composition could result in not only higher rejection of Cu2+ but also much less dosage of surfactant and concentration of SDS in the permeate.

Preparation, Characterization and Performance Studies of Active PVDF Ultrafiltration-Surfactants Membranes Containing PVP as Additive

2015 ◽  
Vol 1134 ◽  
pp. 44-49
Author(s):  
Nur Izzah Md Fadilah ◽  
Abdul Rahman Hassan
Keyword(s):  
Vinylidene Fluoride ◽  
Sodium Dodecyl ◽  
Tween 80 ◽  
Membrane Pores ◽  
Poly Vinylidene Fluoride ◽  
And Performance ◽  
Triton X ◽  
Surface Morphologies ◽  
Performance Surface ◽  
First Time

The role of surfactants in the formation of active Poly (vinylidene fluoride) (PVDF) ultrafiltration (AUF) membranes was studied. The effect combination of surfactants that are Sodium dodecyl sulfate (SDS)/Tween 80 and Tween 80/Triton X-100 formulations on performance and morphological structures were investigated for the first time. The influence of surfactants blends on the membrane pores was also examined. Experimental data showed that combination of Tween 80/Triton X-100 give the highest BSA permeation flux which value 285.51 Lm-2h-1. With combination of SDS/Tween 80, the AUF membrane showed the highest protein rejection up to 93% and 79% for Bovine Serum Albumin (BSA) and Egg Albumin (EA), respectively. Moreover, membranes characterization demonstrated that the addition of SDS/Tween 80 and Tween 80/Triton X-100 were found to affect the performance, surface morphologies and membrane pores of AUF PVDF membranes.

scholarly journals Oil sludge washing with surfactants and co-solvents: oil recovery from different types of oil sludges

2020 ◽  
Author(s):  
Diego Ramirez ◽  
Liz J. Shaw ◽  
Chris D. Collins
Keyword(s):  
Oil Recovery ◽  
Sodium Dodecyl ◽  
Tween 80 ◽  
Selective Extraction ◽  
Oil Sludge ◽  
High Effect ◽  
Recovery Techniques ◽  
Different Types ◽  
Triton X ◽  
Different Sources

Abstract Different physicochemical and biological treatments have been used to treat oil sludges, and oil recovery techniques are preferred such as oil sludge washing (OSW) with surfactants and co-solvents. Toluene is commonly used as co-solvent, but it is non-benign to the environment. This study tested alternative co-solvents (n-pentane, n-hexane, cyclohexane, and isooctane) at 1:1 and 2:1 C/OS (co-solvent to oil sludge ratio). Also, this study evaluated the effect on the oil recovery rate (ORR) of three main parameters in the washing: type, concentration, and application ratio (S/OS) of surfactants to oil sludges. To date, no study has assessed these parameters in the washing of oil sludges from different sources. Four types of oil sludges and five surfactants (Triton X-100 and X-114, Tween 80, sodium dodecyl sulphate (SDS), and rhamnolipid) were used. The results showed that cyclohexane had high ORR and could be used instead of toluene because it is more benign to the environment. The S/OS ratio had a high effect on the ORR and depended on the type of oil sludge. Rhamnolipid, Triton X-100, and Triton X-114 had the highest oil recovery rates (40 – 70%). In addition, it was found that the surfactant concentration had no effect on the ORR. Consequently, the addition of surfactant was not significantly different compared to the washing with no surfactants, except for one sludge. The use of the surfactant in the washing solution can help in the selective extraction of specific oil hydrocarbon fractions in the recovered oil to assess its potential reuse as fuel. Further recommendations were given to improve the OSW process.

Understanding the adsorption behavior of surface active molecules on ZnO nanostructures by experimental and first-principles calculations

2015 ◽  
Vol 17 (45) ◽  
pp. 30450-30460 ◽  
Author(s):  
Baljinder Singh ◽  
Satvinder Singh ◽  
Janpreet Singh ◽  
G. S. S. Saini ◽  
D. S. Mehta ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Sodium Dodecyl Sulphate ◽  
First Principles ◽  
Chemical Method ◽  
Sodium Dodecyl ◽  
Tween 80 ◽  
Zno Nanostructures ◽  
First Principles Calculations ◽  
Surface Active ◽  
Triton X

Zinc oxide (ZnO) nanostructures with different morphologies are prepared in the presence of surface active molecules such as sodium dodecyl sulphate (SDS), Tween 80 and Triton X-100 by a chemical method.

Preparation and Characterization of BaBi2Nb2O9/PVDF Inorganic-Organic Composite Ultrafiltration Membranes

2013 ◽  
Vol 681 ◽  
pp. 309-313
Author(s):  
Dong Hua Zhang ◽  
Li Jing Pan ◽  
Da Zhi Sun
Keyword(s):  
Polyvinylidene Fluoride ◽  
Pure Water ◽  
Water Flux ◽  
Composite Membranes ◽  
Rejection Rate ◽  
Inversion Method ◽  
Ultrafiltration Membranes ◽  
Cross Sectional ◽  
Uf Membranes ◽  
Phase Inversion Method

BaBi2Nb2O9/PVDF (polyvinylidene fluoride) composite ultrafiltration (UF)membranes were prepared by alloying BaBi2Nb2O9 (BBN) particles uniformly in the PVDF solution (15% polymer weight) and used a phase-inversion method. This paper studied the effect of the concentration of BBN from 0% to 5% in 0.2Mpa on pure water flux and rejection rate to Bovine serum albumin (BSA). The cross-sectional structures of composite membranes were observed by scanning electron microscopy (SEM). Moreover, XRD results revealed the crystal structure of PVDF. The experimental results showed that the BBN/PVDF composite ultrafiltration membranes were superior in separation performances than the pure PVDF membranes due to the addition of BBN.

scholarly journals Azo dye removal via surfactant-assisted polyvinylidene fluoride membrane

2021 ◽  
Vol 8 (1) ◽  
pp. 25-32
Author(s):  
Fatemeh Darbandi ◽  
Azadeh Mousavi ◽  
Tayebe Bagheri Lotfabad ◽  
Amir Heydarinasab ◽  
Soheila Yaghmaei
Keyword(s):  
Removal Efficiency ◽  
Azo Dye ◽  
Polyvinylidene Fluoride ◽  
Dye Removal ◽  
Tween 80 ◽  
Contact Angles ◽  
Synthetic Dyes ◽  
Permeate Flux ◽  
Pvdf Membrane ◽  
Tween 60

Background: Recently, concerns have been raised regarding the environmental and public health safety of azo dyes, the most widely used synthetic dyes. The membrane technique has been introduced as one of the efficient methods for dye removal treatments. Polyvinylidene fluoride (PVDF) membrane manipulated by surfactants was studied for removal of the azo dye, carmoisine. Methods: PVDF membrane was prepared via non-solvent-induced phase separation (NIPS) and used to remove the azo dye, carmoisine. Three nonionic surfactants including Tween 20, Tween 60, and Tween 80 were used individually as additives in casting solutions to improve PVDF membrane properties. Results: Fourier-transform infrared spectroscopy (FTIR) demonstrated the presence of functional groups of carbonyl (C=O) and hydroxyl (OH), assigned to Tween molecules, in the membrane chemical structure. All Tween species caused a decrease in the surface hydrophobicity of PVDF membranes illustrated by the reduced contact angles. Each Tween at a 2% concentration in the dope solution led to an increase in the pore-size of PVDF membranes, which was estimated by scanning electron microscopy (SEM). However, this impact was reversed at Tween concentrations of 4%. Membranes were assessed for dye removal efficiency and permeate flux in a cross-flow system. Permeability of PVDF membranes improved (~78%) with adding Tween 80 at a concentration of 2%. Tween 60 at a 2% concentration resulted in a ~45% increase in dye removal efficiency of PVDF membranes. And, atomic force microscopy (AFM) showed that Tween 60 increased membrane surface roughness. Conclusion: Surfactant-mediated changes in the surface properties of PVDF membrane improved dye removal efficacy.

scholarly journals Ecotoxicity of oil sludges and residuals from their washing with surfactants: soil dehydrogenase and ryegrass germination tests

2020 ◽  
Author(s):  
Diego Ramirez ◽  
Liz J. Shaw ◽  
Chris D. Collins
Keyword(s):  
Petroleum Hydrocarbon ◽  
Sodium Dodecyl ◽  
Surfactant Solution ◽  
Tween 80 ◽  
Soil Microbial ◽  
Low Concentrations ◽  
Negative Effect ◽  
High Concentrations ◽  
Triton X ◽  
The Impact

Abstract Oil sludge washing (OSW) with surfactants and co-solvents is used to recover the oil, and this process leaves some residuals (sediments and surfactant solution). Currently, there are no data on the ecotoxicological effects of these OSW residuals from different sludges. This study evaluated the toxicity of OSW residuals from washing four types of oil sludges with five surfactants (Triton X-100 and X-114, Tween 80, sodium dodecyl sulphate (SDS) and rhamnolipid) and a co-solvent (cyclohexane). The toxicity of the residuals was evaluated with the impact on the soil microbial dehydrogenase activity (DHA) and ryegrass (Lolium perenne) seed germination. There was a high DHA detected directly in the sludges and all OSW residual combinations, but this activity could not be attributed to the DHA itself but to some chemical interferences. The DHA was then tested in the soils amended with the OSW residuals to simulate a bioremediation scenario. There were no chemical interferences in this case. In general, the INTF concentrations were significantly higher at low concentrations, 1 and 5% (p < 0.01). There were no significant differences in the DHA at high concentrations of OSW residuals (10, 25 and 50%) which implied that the concentration of the contaminants is not directly proportional to the levels of ecotoxicity. Unexpectedly, the INTF values of the 10, 25 and 50% rhamnolipid-OSW residuals were significantly lower than the Triton X-100 residuals. The ryegrass germination rates were higher than 70% with no apparent phytotoxicity symptoms in the seedlings. Particularly, there was a highly significant negative effect of the residuals on the germination rates at high concentrations (p < 0.01). Given that the extractable petroleum hydrocarbon (EPH) concentrations in the OSW residual-amended soils in both DHA and germination tests were very low (13–21 ppm), other co-contaminants could be contributing to the toxicity. These findings implied that biotreatment techniques can be applied to treat the OSW residuals if necessary.

scholarly journals Alkylresorcinols in rye (Secale cereale L.) caryopses. III. Application of detergents for extraction of proteins and alkylresorcinols

2015 ◽  
Vol 45 (1–2) ◽  
pp. 33-43
Author(s):  
W. Mejbaum-Katzenellenbogen ◽  
J. Łomako ◽  
W. Łomako
Keyword(s):  
Secale Cereale ◽  
Sodium Dodecyl Sulphate ◽  
Sodium Dodecyl ◽  
Tween 80 ◽  
Secale Cereale L ◽  
Triton X

In the work here described sodium dodecyl sulphate solutions (SDS), tween 80 and triton X 100 were used for isolation of proteins and 5-n-alkylresorcinols from ground rye grain. It was found that the above named detergents extract different protein and various amounts of alkylresorcin derivatives. The results indicate that 5-n-alkylresorcinols are localized in the membraneous structures of rye caryopses.

scholarly journals Purification of 2-oxo acid dehydrogenase multienzyme complexes from ox heart by a new method

1980 ◽  
Vol 191 (1) ◽  
pp. 147-154 ◽  
Author(s):  
C J Stanley ◽  
R N Perham
Keyword(s):  
Pyruvate Dehydrogenase ◽  
Pyruvate Dehydrogenase Complex ◽  
Sodium Dodecyl ◽  
Tween 80 ◽  
New Method ◽  
Acid Dehydrogenase ◽  
Multienzyme Complexes ◽  
Oxoglutarate Dehydrogenase ◽  
Triton X ◽  
Dehydrogenase Complex

A new method is described that allows the parallel purification of the pyruvate dehydrogenase and 2-oxoglutarate dehydrogenase multienzyme complexes from ox heart without the need for prior isolation of mitochondria. All the assayable activity of the 2-oxo acid dehydrogenase complexes in the disrupted tissue is made soluble by the inclusion of non-ionic detergents such as Triton X-100 or Tween-80 in the buffer used for the initial extraction of the enzyme complexes. The yields of the pyruvate dehydrogenase and 2-oxoglutarate dehydrogenase complexes are many times greater than those obtained by means of previous methods. In terms of specific catalytic activity, banding pattern on sodium dodecyl sulphate/polyacrylamide-gel electrophoresis, sedimentation properties and possession of the regulatory phosphokinase bound to the pyruvate dehydrogenase complex, the 2-oxo acid dehydrogenase complexes prepared by the new method closely resemble those described by previous workers. The greatly improved yield of 2-oxo acid dehydrogenase complexes occasioned by the use of Triton X-100 or Tween-80 as solubilizing agent supports the possibility that the bulk of the pyruvate dehydrogenase complex is associated in some way with the mitochondrial inner membrane and is not free in the mitochondrial matrix space.

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