Water-in-water (W/W) emulsions formed by mixing incompatible water-soluble polymers cannot be stabilized with molecular surfactants. However, they can particles through the so-called Pickering effect. Recently, it was shown that its stabilization achieved also nanoplates. Here, we show for first time even nanorods in form of cellulose nanocrystals (CNCs) efficiently stabilize W/W emulsions. Static light scattering and confocal microscopy techniques were used to determine surface coverage...

The effect of the addition protein particles was investigated on stability water-in-water emulsions formed by mixing aqueous dextran and poly (ethylene oxide) solutions. Protein with hydrodynamic radii ranging from 15 to 320 nm were produced heating globular proteins in controlled conditions. structure visualized confocal laser scanning microscopy using different fluorescent probes label phase particles. It is shown that contrary native proteins, adsorb at interface can form a monolayer...

Water-in-water emulsions were formed by mixing incompatible aqueous solutions of dextran and poly(ethylene oxide) (PEO) in the presence latex or protein particles. It was found that particles with a radius as small 0.1 μm become trapped at interface between PEO- dextran-rich phases interfacial tensions down to 10(-6) N/m. The visualized emulsion droplets using confocal laser scanning microscopy (CLSM) allowing determination contact angle. Various degrees coverage could be observed. On...

The structure and stability of water-in-water emulsions was investigated in the presence spherical, pH-sensitive microgels. were formed by mixing aqueous solutions dextran PEO. microgels consisted cross-linked, synthetic polymers with a radius that steeply increased from 60 to 220 nm increasing pH within narrow range around 7.0. At all values between 5.0 7.5, preferentially situated at interface, but only 7.0 stable for least 1 week. droplet size visualized confocal laser scanning microscopy...

The phase diagram of mixtures xyloglucan (XG) and amylopectin (AMP) in aqueous solution is presented. Water-in-water emulsions prepared from the two-phase regime were studied detail, interfacial tension was determined. It shown that can be stabilized by addition β-lactoglobulin microgels (βLGm), but only at pH ≤ 5.0. Excess βLGm preferentially entered AMP > 5.0 XG lower pH. inversion caused adsorption onto started below 5.5. modification surface particles coating with polysaccharides a...

Protein fibrils, microgels, and fractal aggregates were produced by heating solutions of β-lactoglobulin (β-lg) under different conditions. The effect the protein particle morphology on stability structure water-in-water (W/W) emulsions was studied for mixtures poly(ethylene oxide) (PEO) dextran. particles partition to dextran phase at pH 7.0 where they have a net negative charge, but prefer PEO 3.0 positive charge. partitioning comparing with those 7.0. preference one or other are shown...

Particle-stabilized water-in-water emulsions were prepared by mixing dextran and poly(ethylene oxide) (PEO) in water adding cellulose nanocrystals (CNC). The CNC formed a layer at the surface of dispersed droplets PEO-rich phase. Excess partitioned to continuous Aggregation different rates was induced NaCl between 10 100 mM. In presence more than 2 g/L CNC, fast aggregation led formation an emulsion gel showing no signs creaming. Confocal laser scanning microscopy showed that emulgels...

Cellulose nanocrystals (CNC) are rod-like biosourced nanoparticles that widely used in a range of applications. Charged CNC was obtained by acid extraction from cotton and dispersed aqueous solution using ultrasound characterized light scattering. Aggregation gelation induced addition NaCl investigated scattering as function the concentration (30–70 mM), (0.5–5 g/L), temperature (10–60 °C). Formation fractal aggregates observed grow with time until they percolate form weak system spanning...

The viscosity (η) of dextran (Dex), methyl cellulose (MC), hydroxypropylmethyl (HPMC), κ-carrageenan (KC), alginate (Alg), and carboxymethyl (CMC) was measured as a function the shear rate (γ̇) over broad range concentrations both in salt-free water 0.1 M NaCl. concentration (C) dependence Newtonian (η0) found to be universal for neutral polysaccharides anionic NaCl when C multiplied with intrinsic viscosity. compared theoretical predictions assuming dominant hydrodynamic or topological...

Cross-correlation dynamic light scattering was used to measure the structure factor of heated solutions globular protein β-lactoglobulin at pH 7 and 0.1 M NaCl. After 24 h heating 80 °C finite size aggregates are formed concentrations below 15 g/L, whereas higher turbid gels formed. The may be considered as collections randomly close packed "blobs" with a self-similar characterized by fractal dimension df = 2.0 ± 0.1. concentration dependence compared that elastic shear modulus. results for...

It is shown how interpenetrated polymer networks can be formed by self-assembly in water of two different amphiphilic triblock copolymers, which preserve and combine the properties stimuli-responsiveness each polymer. Aqueous solutions a pH UV-sensitive copolymer spontaneously self-assembled network when mixed. The polymers were based on poly(acrylic acid) poly(ethylene oxide), respectively, had hydrophobic end blocks. structure mixed was studied with light scattering dynamic mechanical...

Abstract We analyze the peeling properties of an uncross-linked pressure sensitive adhesive. 90° master curves on PyrexTM and PMMA (polymethylmetacrylate) are constructed The shift coefficients aT compared with ones obtained from rheometrical shear tests. With our machine, front is kept fixed, enabling us to observe mechanisms deformation count four different in cohesive failure, three interfacial (the last being unstable); they correspond various slopes that we identify. flow patterns at...

Superhydrophobic surfaces present properties of self-cleaning and unwetting that could be applied in the optics field. The wetting dewetting these superhydrophobic are compared to only hydrophobic polyethylene. contact angle such a surface varies from 170° 130–140°. is studied using two techniques dynamic measurements. behaviors surfaces, dried or prewetted with water vapor, different. previously discontinuous, slower than dry one. This specific behavior interpreted as roughness effect on...