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CO2 switchable foams have gained increasing attention recently for their smart properties.

Abatract: The poly (L-lactide)/laponite composite films are prepared by the method of solution blending with polylactide (PLA) and laponite. The results show that when laponite content was lower than 0.2 %( mass w/w), laponite can be uniform dispersed in PLA and the composed material had good stability. Fourier transform infrared spectroscopy (FTIR) study demonstrates that PLA was successfully incorporated with laponite by Si-O bond. The mechanical measurement reveals that the tensile strength of PLA/laponite composite film has been increased with compared to pure PLA. The water contact angle (WCA) tests indicate that the hydrophobicity of the laponite modified PLA films can be improved. The present study reveals that the laponite as a complexing agent can improve the mechanical properties and hydrophilicity of PLA.

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To expand the extent of conjugation with biologically active molecules (biopolymers, peptides, drugs, etc.) and biomaterial substrates, we synthesized a serial of poly (ethy1ene glycol) (PEG) derivatives (PEG-2000-NH2, MPEG-1200-NH2, and APEG-1200-NH2) in three efficient steps. The end groups were characterized by 1H NMR spectroscopy.

The present work describes a solution-liquid-solid (SLS) synthesis route for the preparation of CdSe nanocrystal quantum dots using the low-melting-point Bi nanoparticles as catalysts. UV-vis absorption spectra were used to determine the growth of CdSe cluster. The shape and size distribution of the CdSe QDs were determined by analysis of Transmission electron microcopy (TEM) images. A peak wavelength of 399nm in the absorption spectra on day 5 indicated that the CdSe cluster formed. TEM micrographs showed that CdSe QDs had a relatively narrow distribution of QD size, and the diameter of CdSe QDs was about 4 nm. Our preliminary results illustrated that smaller size of CdSe QDs could be prepared by SLS method and it was small enough for bioimaging applications.