Customer publications

Here is a list of publications involving a Xenocs SAXS/WAXS system in the experimental conditions.

Customer publications

Structure formation in nanophase-separated systems with lamellar morphology: Comb-like vs. linear precision polymers

Danke, Varun; Gupta, Gaurav; Reimann, Sophie; Binder, Wolfgang H.; Beiner, Mario

We report findings of a comparative study of a comb-like polymer, poly(1,4-phenylene-2,5-n-didecyloxy terephthalate) and a linear chain precision polymer consisting of a methyl protected 2,6-diaminopyridine group after every 20th methylene unit of a linear saturated polyethylene chain . Both polymers exhibit lamellar morphologies related to a nanophase separation of the…
12 March 2019
Customer publications

Characterization of cereal β-glucan extracts: Conformation and structural aspects

Zielke, Claudia; Stradner, Anna; Nilsson, Lars

Several health benefits have been established for cereal mixed-linkage β-glucan of high molar mass (M), and are said to be attributed to the ability of β-glucan to form viscous slurries in the gut. As no comprehensive understanding exists yet, the characterization of β-glucan solution behavior is crucial. β-Glucan was characterized…
12 March 2019
Customer publications

Cellulose gelation in NaOH solutions is due to cellulose crystallization

Pereira, Ana; Duarte, Hugo; Nosrati, Pegah; Gubitosi, Marta; Gentile, Luigi; Romano, Anabela; Medronho, Bruno; Olsson, Ulf

Cellulose gelation in 2 M NaOH aqueous solution was followed by time resolved turbidity and rheology measurements. The kinetics of gelation is observed to change from several hours down to few seconds when the temperature is increased from 25 to 30 °C. The increase of turbidity upon gelation demonstrates the…
12 March 2019
Customer publications

On cellulose dissolution and aggregation in aqueous tetrabutylammonium hydroxide

Gubitosi, Marta; Duarte, Hugo; Gentile, Luigi; Olsson, Ulf; Medronho, Bruno

Aqueous tetrabutylammonium hydroxide, TBAH(aq), has been found to dissolve cellulose and to be a potential solvent for chemical processing or fiber spinning. In this paper, we have investigated the dissolution state of cellulose in 40 wt % TBAH(aq) solvent, and present an extensive study of rheology, combined with static light…
12 March 2019
Customer publications

Hydrogels composed of hyaluronic acid and dendritic ELPs: hierarchical structure and physical properties

Shmidov, Yulia; Zhou, Mingjun; Yosefi, Gal; Bitton, Ronit; Matson, John B.

Hydrogels that mimic the native extracellular matrix were prepared from hyaluronic acid (HA) and amine-terminated dendritic elastin-like peptides (denELPs) of generations 1, 2, and 3 (G1, 2, and 3) as crosslinking units. The physical properties of the hydrogels were investigated by rheology, scanning electron microscopy, swelling tests, small-angle X-ray scattering…
12 March 2019
Customer publications

Ferrihydrite Nanoparticle Aggregation Induced by Dissolved Organic Matter

Gentile, Luigi; Wang, Tao; Tunlid, Anders; Olsson, Ulf; Persson, Per

Ferrihydrite (Fh) nanoparticles are omnipresent in nature and often highly mobile because of their colloidal stability. Thus, Fh serves as a vector for iron as well as associated nutrients and contaminants. Here, we demonstrate, using small-angle X-ray scattering combined with cryo-transmission electron microscopy (cryo-TEM), that dissolved organic matter (DOM), extracted…
12 March 2019
Customer publications

Improving adhesion between aramid fibers and natural rubber through morphological and synthetic modification of the fibers

Kanbargi, Nihal; Lesser, Alan J.

ABSTRACT In this article, we present new methods to improve the adhesion between poly(paraphenylene terephthalamide) fibers and a natural rubber for tire reinforcement. Fiber pretreatments are applied to create new surface morphologies on the fiber that enables enhanced adhesion between the fiber and rubber matrix. The pretreated fibers are then…
12 March 2019
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsLiquid crystalsMaterialPhase analysisPolymer researchPore size and pore size distributionProteins & DNA/RNASelf-assembled materialTechniqueWAXS

Size-Selective Adsorption in Nanoporous Polymers from Coumarin Photo-Cross-Linked Columnar Liquid Crystals

Concellón, Alberto; Schenning, Albertus P. H. J.; Romero, Pilar; Marcos, Mercedes; Serrano, José Luis

We have prepared nanoporous polymers from columnar hexagonal hydrogen-bonded complexes, whose order is fixed by coumarin photoinduced cycloaddition (photodimerization). Two different hydrogen-bonded complexes were used and consisted of a melamine (M) or tris(triazolyl)triazine (T) derivative acting as central templates and three peripheral carboxylic acids containing coumarin units. These…
12 March 2019
Customer publications

Tuning the interphase adhesion in high-density polyethylene–silica nanocomposites with ionic liquids

Donato, Katarzyna Z.; Donato, Ricardo K.; Zhigunov, Alexander; Mauler, Raquel S.; Schrekker, Henri S.

This work addresses the use of ionic liquids (ILs) as multifunctional additives in the formation of high-density polyethylene (HDPE)/sol–gel silica nanocomposites via the melt-mixing process. Different approaches for nanocomposite formation were studied and compared, including (1) silica modification with ILs during the sol–gel process and further addition into the polymer…
12 March 2019

SAXS WAXS Articles

SAXS WAXS Articles

SAXS WAXS Articles – Publications With SAXS Measurements

SAXS WAXS Articles – Publications With SAXS Or WAXS Measurements Using Xenocs SAXS WAXS GISAXS Instruments In The Laboratory