Light-responsive viscoelastic fluids based on anionic wormlike micelles

Lü, Yong; Zhou, Tengfei; Fan, Qing; Dong, Jianfeng; Li, Xuefeng

doi:10.1016/j.jcis.2013.09.014

Cited by 60 publications

(45 citation statements)

References 43 publications

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“…Upon further increasing the concentrations of Na 2 CO 3 and OTAB, the viscosity is increased rapidly and a maximum viscosity is reached at [Na 2 CO 3 ]=2.54 wt.% and [OTAB]=1.2 wt.% for the NaOA/Na 2 CO 3 and NaOA/OTAB systems, respectively. Such a rapid growth in viscosity can be attributed to the long and entangled wormlike micelles formation, which is commonly observed in similar wormlike micelle systems [16,27,28]. However, further increasing [Na 2 CO 3 ] and [OTAB] would result in the viscosity decrease, because excessive salt could adsorb on the micelle surface and reduce the net charge of wormlike micelles, which might cause wormlike micelles becoming huddled [27][28][29].…”

Section: Effects Of Inorganic and Organic Additivesmentioning

confidence: 92%

“…Thus, the wormlike micelles would undergo a transition from linear to branched threefold junctions [1,11]. Since the inter-micellar junctions can effectively slide along the micellar body, the branched wormlike micelles would result in a reduced viscosity compared to the entangled ones [1], which is generally presented in wormlike micelle systems [16,27,28].…”

Section: Effects Of Inorganic and Organic Additivesmentioning

confidence: 99%

“…The addition of inorganic salts, such as KCl, NaCl, Na 2 CO 3 , and NaCl/NaOH could give rise to a highly viscoelastic fluids of NaOA solution [14,15]. Recently, a new light-responsive viscoelastic fluid based on NaOA wormlike micelles was discovered by introducing the cationic azobenzene dye C 0 AZOC 2 IMB in the system [16].…”

Section: Introductionmentioning

confidence: 99%

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Nanoparticles induced micellar growth in sodium oleate wormlike micelles solutions

Fan

Li²,

Zhang³

et al. 2015

Colloid Polym Sci

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The rheological behavior of anionic surfactant sodium oleate (NaOA) in the presence of inorganic salt of sodiu m c a r b o n a t e ( N a 2 C O 3 ) , o r g a n i c s a l t o f nOctyltrimethylammonium bromide (OTAB) and nano-sized silica particles (nano SiO 2 ) was studied in detail. Regardless of the surfactant concentration (NaOA), OTAB was stronger than that of Na 2 CO 3 in promoting the rapid growth of NaOA micelles, resulting in higher viscosity of NaOA aqueous solutions. It was found that nano SiO 2 nearly not affects solution viscosity in the NaOA/Na 2 CO 3 system. However, results of NaOA/OTAB system in the presence of nano SiO 2 show that nano SiO 2 promoted wormlike micelles formation and enhanced the bulk viscosity. Simultaneously, the presence of nano SiO 2 also facilitated the branched wormlike micelles formation as confirmed by viscosity and cryo-TEM measurements because of the electrostatic interactions between wormlike micelles and nano SiO 2 .

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Section: Effects Of Inorganic and Organic Additivesmentioning

confidence: 92%

Section: Effects Of Inorganic and Organic Additivesmentioning

confidence: 99%

See 1 more Smart Citation

Nanoparticles induced micellar growth in sodium oleate wormlike micelles solutions

Fan

Li²,

Zhang³

et al. 2015

Colloid Polym Sci

Self Cite

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“…Similarly, Zheng et al [13] prepared a UV-induced self-assembly based on N-methyl-N-cetylpyrrolidinium bromide (C16MPBr) and sodium (4-phenylazophenoxy)-acetate (AzoNa) through facile mixing of C16MPBr and trans-AzoNa in water. Li and co-workers [14] reported a new class of light-responsive viscoelastic fluids based on sodium oleate in the presence of a cationic azobenzene dye, 1-[2-(4-phenylazo-phenoxy)-ethyl]-3-methylimidazolium bromide (C 0 AZOC 2 IMB, Fig. 3.1a).…”

Section: Uv/vis Isomerization Of a Light-respondermentioning

confidence: 99%

Light-responsive Wormlike Micelles

Feng¹,

Chu

Dreiss

2015

SpringerBriefs in Molecular Science

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UV/Vis light as a trigger displays a set of advantages over other types of stimuli in terms of its "clean" character, low cost, and precise spatial localization, and for these reasons it has been widely exploited in the development of smart materials. Light-responsive wormlike micelles take advantage of light-induced cis-trans isomerization or dimerization of light-sensitive surfactants or additives containing a suitable chromophore. These changes alter the packing of surfactant molecules in the aggregates and drive micellar transitions between wormlike micelles and other structures, thus tuning the viscoelasticity. This chapter summarizes two types of strategies in manipulating light-sensitive wormlike micelleseither to incorporate light-sensitive additives into classical existing wormlike micellar solutions or to directly introduce light-sensitive functional moieties on the surfactant molecules. In both cases, the worms self-assemble or disassemble upon alternate UV/Vis light irradiation.Keywords Photo-switchable · Light-responsive · Wormlike micelles · Azobenzene · Cis-trans isomerization · Photo-rheology UV/Vis light as a trigger displays a set of benefits over other types of stimuli and thus has been widely exploited in the development of smart materials [1][2][3][4]. Light as a stimulus is relevant to many biological processes, in which optical signals are recorded and transduced as sophisticated biochemical events. In addition, in contrast to redox reagents, pH, stress, or salinity, light is an elegant and non-invasive trigger and can be operated in a clean environment, thus avoiding changes in the composition or thermodynamic conditions. It is a cheap and readily available trigger as a mild energy source. Finally, better than ultrasound and electricity, light can be directed at a precise spatial location; this is particularly valuable in nanoscience and nanotechnology and for medical applications.Light has been used as a trigger by exploiting dimerization, cis-trans isomerization, photo-scission, polymerization, or polarity changes in a range of systems [3]. However, quite obviously, not all reported light-sensitive surfactants

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“…[16][17][18][19][20][21][22][23] With the development of the research on the smart material, stimuli-responsive polymers have attracted significant interest. When they are subjected to external environmental stimuli, [24] such as the changes of solvent, [25] temperature, [26][27][28] ionic strength, [29] pH, [30,31] and light irradiation, [32,33] the molecular chains of the corresponding stimuli-responsive polymer brushes will generate a conformational change, leading to the changes in the properties of polymer brushes.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of dual-responsive spiropyran-based random copolymer brushes via surface-initiated atom transfer radical polymerization

Liu

Yang

et al. 2016

Designed Monomers and Polymers

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(2016) Preparation and characterization of dual-responsive spiropyran-based random copolymer brushes via surfaceinitiated atom transfer radical polymerization, Designed Monomers and Polymers, 19:2, 193-204, DOI: 10.1080/15685551.2015 shenzhen institutes of advanced Technology, Chinese academy of sciences, shenzhen, P.r. China ABSTRACT Silica nanoparticles (SiO 2 ) were grafted with the precursor random copolymer of 1′-(2-acryloxyethyl)-3′,3′-dimethyl-6-nitrospiro-(2H-1-benzopyran-2,2′-indoline) (SPMA) and tert-butyl methacrylate (tBMA) by surface-initiated atom transfer radical polymerization (SI-ATRP), and SiO 2 -g-P(SPMA-comethacrylic acid (MAA)) was obtained via chemical hydrolysis of the resulting precursor random copolymer in acidic conditions. From transmission electron microscopy, we observed the spherical morphology of monodispersed silica nanoparticles and core-shell structure of SiO 2 -g-P(SPMAco-MAA). Energy dispersive spectroscopy, Fourier transform infrared spectra, X-ray photoelectron spectroscopy, and the thermogravimetric analysis indicated that the polymer had been successfully grafted onto the surface of silica nanoparticles. The dual-responsive properties were characterized by means of ultraviolet-visible spectrophotometer and dynamic light scattering. The average hydrodynamic diameter of SiO 2 -g-P(SPMA-co-MAA) increased from 185.7 to 212.7 nm under ultraviolet light irradiation for 5 min. Also, the particle size of SiO 2 -g-P(SPMA-co-MAA) increased with the rising pH value of surrounding condition.

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Light-responsive viscoelastic fluids based on anionic wormlike micelles

Cited by 60 publications

References 43 publications

Nanoparticles induced micellar growth in sodium oleate wormlike micelles solutions

Nanoparticles induced micellar growth in sodium oleate wormlike micelles solutions

Light-responsive Wormlike Micelles

Preparation and characterization of dual-responsive spiropyran-based random copolymer brushes via surface-initiated atom transfer radical polymerization

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