Gilbert, Jennifer; Valldeperas, Maria; Dhayal, Surender K.; Barauskas, Justas; Dicko, Cedric; Nylander, Tommy
Immobilisation of ?-galactosidase within a lipid sponge phase: structure, stability and kinetics characterisation
In the formulation of an active enzyme enclosed in a matrix for controlled delivery, it is a challenge to achieve a high protein load and to ensure high activity of the protein. For the first time to our knowledge, we report the use of a highly swollen lipid sponge (L3)…
Enhancing the accessibility to basic sites of as-synthesized silicas applied in catalytic transesterification
Zapelini, Iago W.; Silva, Laura L.; Oliveira, Cristiano L. P.; Cardoso, Dilson
Heterogeneous catalysis for biodiesel production is a current challenge due to the low activity of solid catalysts, especially caused by diffusional resistances. Hybrid silicas, containing SiO?CTA+ provide high conversions in the transesterification of oils and model molecules, but this activity is limited to the external surface area. The generation of…
Unveiling the role of hydrothermal carbon dots as anodes in sodium-ion batteries with ultrahigh initial coulombic efficiency
Xie, Fei; Xu, Zhen; Jensen, Anders C. S.; Ding, Feixiang; Au, Heather; Feng, Jingyu; Luo, Hui; Qiao, Mo; Guo, Zhenyu; Lu, Yaxiang; Drew, Alan J.; Hu, Yong-Sheng; Titirici, Maria-Magdalena
Hard carbon materials are regarded as the most promising anode materials for sodium-ion batteries (SIBs) due to their best cost-effectiveness. However, their relatively low specific capacity and initial Coulombic efficiency (ICE) compared with the graphite anode in lithium-ion batteries still limit the energy density for further development. Thus, it is…
Tailored crystalline order of nascent polyethylene from metallocene supported on confined polystyrene
Wu, Yanjie; Yang, Huaqin; Li, Wei; Mattea, Carlos; Stapf, Siegfried; Zhang, Letian; Ye, Chunlin; Ye, Xiaofeng
Building the desirable superstructure of polyethylene is one of the important topics for developing high value-added products, which brings potential benefits for society and sustainable development. Crystalline order is the ubiquitous superstructure for enhancing mechanical properties of polymeric materials. In this work, polystyrene copolymers (c-PS) are incorporated into pores of…
Structure Evolution and Deformation Behavior of Polyethylene Film during Biaxial Stretching
Chen, Qiang; Wang, Zhiwei; Zhang, Sumei; Cao, Ya; Chen, Jinyao
The structure evolution and deformation behavior of tenter-frame biaxially oriented polyethylene (TF-BOPE) films were investigated in this study. For sequential biaxial stretching, the original spherulites were broken into small pieces, and the fibrillar structure simultaneously formed during the machine direction (MD) stretching. Subsequently, the single fibrils were pulled away, and…
Antimicrobial and cytotoxic activity of (thio)alkyl hexopyranosides, nonionic glycolipid mimetics
Dubák, Petr; Gurská, So?a; Bogdanová, Kate?ina; Uhríková, Daniela; Kanjaková, Nina; Combet, Sophie; Klunda, Tomá; Kolá?, Milan; Hajdúch, Marian; Poláková, Monika
A series of 19 synthetic alkyl and thioalkyl glycosides derived from d-mannose, d-glucose and d-galactose and having C10C16 aglycone were investigated for cytotoxic activity against 7 human cancer and 2 non-tumor cell lines as well as for antimicrobial potential on 12 bacterial and yeast strains. The most potent compounds were…
Morphological Evolution of Tetrachlorinated Perylene Bisimides with Lengthy Alkyl Substituent Polycrystalline Thin Films during Reversible Phase Transitions
Xin, Rui; Wang, Shaojuan; Zeng, Cheng; Ji, Andong; Zhang, Jie; Ren, Zhongjie; Jiang, Wei; Wang, Zhaohui; Yan, Shouke
The phase behavior and related morphological evolution of thin films of lengthy alkyl substituted core-tetrachlorinated perylene bisimide (C18-4ClPBI), a large ?-conjugated molecule, have been studied. It is found that the C18-4ClPBI can exist in two different crystalline phases depending on temperature, which transform reversibly in heating and cooling processes. The…
Physicochemical Properties of the Binary Mixtures of CuII-Containing Chelate-Based Ionic Liquids with Linear Alcohols
Zhang, Songna; Wang, Yongtao; Wang, Xinyu; Yao, Jia; Li, Haoran
Systematic measurements (densities, viscosities, conductivities) combined with small-angle X-ray scattering (SAXS) experiments were performed for binary mixtures of CuII-containing chelate-based ionic liquid (ChIL) with linear alcohols. The experimental results were explained by disruption of alcohols to ionic aggregation of the ChILs. Viscosity deviations (??) of four binary systems all show
Photo-degradation of polyethylene under stress: A successive self-nucleation and annealing (SSA) study
Liu, Qiang; Liu, Shixiang; Lv, Yadong; Huang, Yajiang; Kong, Miqiu; Yang, Qi; Li, Guangxian
Successive self-nucleation and annealing (SSA) technique based on calorimetry is utilized to reveal the effect of uniaxial tensile stress on the photo-oxidation of high density polyethylene (HDPE). Stress-induced acceleratory and inhibitory effects on HDPE are confirmed by analyzing the newly formed melting peaks at low temperatures and the gradually disappeared…
Tailoring the pore size and permeability of isoporous membranes through blending with poly(ethylene glycol): Toward the balance of macro- and microphase separation
Yang, Cao-ying; Zhu, Guo-dong; Yi, Zhuan; Qiu, Ya-yu; Liu, Li-fen; Gao, Cong-jie
Isoporous membranes prepared from the combination of self-assembly and non-solvent induced phase inversion (SNIPS) were known for their asymmetric structures that were characterized with an isoporous top layer and porous/interconnected sublayer. This unique feature provides an opportunity to tailor the structure on toplayer and sublayer separately or synchronously by adjusting…