Ha, Yu-Mi; Seo, Hae Cheon; Kim, Young-O; Khil, Myung-Seob; Cho, Jae Whan; Lee, Jae-Suk; Jung, Yong Chae
Effects of Hard Segment of Polyurethane with Disulfide Bonds on Shape Memory and Self-Healing Ability
Self-healing polyurethane with disulfide bonds was synthesized using polycarbonate diol as a soft segment, and methylene diphenyl diisocyanate and 2-hydroxyethyl disulfide as a hard segment. Well-developed phase separation as the hard segments increased was confirmed by Fourier transform infrared spectra. The X-ray diffraction data showed that the crystallinity of the…
Strong, Water-Stable Ionic Cable from Bio-Hydrogel
Kong, Weiqing; Li, Tian; Chen, Chaoji; Chen, Gegu; Brozena, Alexandra H.; Liu, Dapeng; Liu, Yang; Wang, Chengwei; Gan, Wentao; Wang, Sha; He, Shuaiming; Hu, Liangbing
Nanofluids have attracted much attention due to their various applications in energy storage, water desalination, and ionic circuits. However, the practical applications of the existing ionic conductors are limited due to their poor mechanical strength and stability in water. Here, inspired by nature, we develop a mechanically robust and water-stable…
Introducing Functionality to Fluorinated Electroactive Polymers
Kallitsis, Konstantinos; Soulestin, Thibaut; Tencé-Girault, Sylvie; Brochon, Cyril; Cloutet, Eric; Domingues Dos Santos, Fabrice; Hadziioannou, Georges
Fluorinated electroactive polymers (FEPs) are among the most interesting insulating materials for the production of organic electronic devices. Their ability to tune their response to an applied electric field makes them appropriate for vastly different applications in electronics. However, due to the chemical inertness of such polymers and the rather…
Characterization of phospholipid vesicles containing lauric acid: physicochemical basis for process and product development
Farkuh, Laura; Hennies, Paulo T.; Nunes, Cláudia; Reis, Salette; Barreiros, Luisa; Segundo, Marcela A.; Oseliero Filho, Pedro L.; Oliveira, Cristiano L. P.; Cassago, Alexandre; Portugal, Rodrigo V.; Muramoto, Rodrigo A.; Carretero, Gustavo P. B.; Schreier, Shirley; Chaimovich, Hernan; Cuccovia, Iolanda M.
Lauric acid (LAH) strongly inhibits the growth of acne-causing bacteria. LAH is essentially water-insoluble and the solubility of laurate (LA) salts are medium and temperature dependent. Hence, LAH/LA preparations are difficult to formulate. Here we fully characterized phospholipid vesicles containing up to 50 mol% LAH. Vesicles of dipalmitoylphosphatidylcholine (DPPC) containing…
Periodic Polyethylene Sulfonates from Polyesterification: Bulk and Nanoparticle Morphologies and Ionic Conductivities
Rank, Christina; Yan, Lu; Mecking, Stefan; Winey, Karen I.
A series of polyethylene-like ionomers with periodic sulfonate groups were synthesized by polyesterification of octatetracontane-1,48-diol and tetrabutylammonium dimethyl sulfosuccinate. Optional cation exchange in aqueous dispersions replaced the NBu4+ counterions for Na+ or Cs+. The defined periodic microstructure of the polymers leads to the formation of layered structures in bulk and…
Phase separation and performance of polyethersulfone/cellulose nanocrystals membranes
Lessan, Fatemeh; Karimi, Mohammad; Bañuelos, Jose Leobardo; Foudazi, Reza
We investigate the effect of cellulose nanocrystals (CNC) as a hydrophilic nanoparticle on the characteristics of polyethersulfone (PES) based membranes. The membranes are fabricated using typical nonsolvent induced phase separation (NIPS) method. We study the radius of gyration and aggregation of PES in dimethylformamide in the presence of CNC, the…
Continuous, high-throughput production of artemisinin-loaded supramolecular cochleates using simple off-the-shelf flow focusing device
Shuddhodana; Wong, Pooi Wen Kathy; Judeh, Zaher
Lipid cochleates are gaining increasing interest as drug-carriers. However, their preparation relies on conventional batch processes that are complex, time consuming and lack batch-to-batch reproducibility; presenting a bottleneck for clinical translation. We report an efficient continuous preparation process for artemisinin-loaded cochleates (ART-cochleates) using inexpensive off-the-shelf flow
Variance of Zein Protein and Starch Granule Morphology between Corn and Steam Flaked Products Determined Starch Ruminal Degradability Through Altering Starch Hydrolyzing Bacteria Attachment
Xu, NingNing; Wang, DiMing; Liu, JianXin
The current study investigated differences of ?-zein protein contents and starch granule characteristics between raw and steam flaked corns and their influences on ruminal starch hydrolyzing bacteria (SHB) attached to corn grain. Two types of raw (Corn1 and Corn2) and their steam-flaked products (SFCorn1 and SFCorn2) were applied to explore…
Nanoscopic Structure of Complexes Formed between DNA and the Cell-Penetrating Peptide Penetratin
de Mello, Lucas Rodrigues; Hamley, Ian William; Castelletto, Valeria; Garcia, Bianca Bonetto Moreno; Han, Sang Won; de Oliveira, Cristiano Luis Pinto; da Silva, Emerson Rodrigo
One of the most remarkable examples of cell-penetrating peptides (CPPs) is Penetratin, a 16-mer fragment derived from the Drosophila Antennapedia homeobox. Understanding the structure of Penetratin/DNA complexes is a key factor for the successful design of new vectors for gene delivery and may assist in optimizing molecular carriers based on…
Crystal Chemistry and SAXS Studies of an Octahedral Polyoxoarsenotungstate Nanocluster Encapsulating Four Unprecedented Thorium Arsenate Fragments (Th3As2On n = 25 or 26)
Dufaye, Maxime; Duval, Sylvain; Stoclet, Grégory; Loiseau, Thierry
The reaction of 8 with the 5f tetravalent thorium cation in presence of an acetate buffer and KCl at pH = 4.7 gives rise to the formation of an octahedral polyoxoarsenotungstate nanocluster 38. This molecule is constructed around four unprecedented Th3As2On (n = 25 or 26) fragments stabilized by the…