Co-reporter:Dan Zhao;Xiao-dong Xu 徐晓冬;Shuai-shuai Yuan 袁帅帅
Chinese Journal of Polymer Science 2017 Volume 35( Issue 7) pp:887-896
Publication Date(Web):26 May 2017
DOI:10.1007/s10118-017-1930-9
Marine economy is seriously affected by marine biofouling, which has plagued people for thousands of years. Although various strategies have been developed to protect artificial surfaces against marine biofouling, cost-effective biofouling-resistant coating is still a goal in pursue. Herein, a cost-effective liquid-infused porous slippery surface (LIPSS) was facilely prepared by using poly(styrene-b-(ethylene-co-butylene)-b-styrene) (SEBS) elastomer to form microsphere surfaces, followed by infusing fluorocarbon lubricants into the porous structure. The as-prepared slippery surfaces were characterized by static water contact angle, sliding velocity and sliding angle analysis. We also investigated the adhesion behavior of Escherichia coli (E. coli) and limnetic algae on different surfaces. It is confirmed that the slippery surfaces have better anti-biofouling properties than the porous SEBS reference. This cost-effective approach is feasible and easily produced, and may potentially be used as fouling-resistant surfaces.
Co-reporter:Qiang Shi;Jianwen Hou;Jian Gao;Chunming Li;Jing Jin;Shing-Chung Wong;Jinghua Yin
Advanced Materials Interfaces 2016 Volume 3( Issue 5) pp:
Publication Date(Web):
DOI:10.1002/admi.201500652
A newly developed nanofiber platform for nonadherent cell capture and release is demonstrated. The nanofiber platform is fabricated by single-spinneret electrospinning of bovine serum albumin (BSA)-conjugated poly(N-isopropylacrylamide) (PNIPAAm) and polycaprolactone blends. The nanofibers possess core-sheath structure with PNIPAAm as the sheath, which render the nanofibers switchable between hydrophilicity and hydrophobicity with the temperature change. As a result of BSA immobilization on the sheath part, the nanofibers resist platelet adhesion in the blood, facilitating the direct capture and isolation of red blood cells (RBCs) from the blood. Meanwhile, the captured RBCs are readily released from the nanofibers with the temperature stimuli. The capture and release efficiencies of up to 100% are achieved while maintaining cellular integrity and function. This work presents a promising platform to capture and release nonadherent cell effectively for subsequent molecular analysis and disease diagnosis.
Co-reporter:Meng Zhang;Xianneng Tu;Jingyang Wang
Chemical Research in Chinese Universities 2016 Volume 32( Issue 4) pp:530-533
Publication Date(Web):2016 August
DOI:10.1007/s40242-016-6037-2
In this paper, CuO, CuO/Cu2O, Cu2O, Cu2O/Cu and Cu microcrystals were synthesized via a hydrothermal method by mixing Cu(NO3)2·3H2O and NaOH together in the presence of an ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate([BMIM]BF4) or 1-butyl-3-methylimidazolium chloride([BMIM]Cl). The structures and the morphologies of the obtained products were characterized by means of X-ray diffractometer( XRD), field-emission scanning electron microscopy/energy-dispersive spectroscopy(FESEM/EDS), transmission electron microscopy/selected area electron diffraction(TEM/SAED) and Raman spectroscopy. The result of XRD indicates that Cu2O and Cu microcrystals are cubic phase and the Raman spectra confirm the presence of carbon. The results of FESEM and TEM images show Cu2O microcrystals as rule cubes of 2 μm in length and Cu particles of 5 μm in diameter. According to the difference between crystal structures, bi-component and single component products were synthesized by adjusting the reaction conditions. A possible formation mechanism of Cu2O and Cu was proposed in [BMIM]BF4.
Co-reporter:Xiaodong Xu, Siwei Feng, Yuanqi Zhu, Han Li, Xiande Shen, Chunhong Zhang, Jianwei Bai, Lili Zhang
European Polymer Journal 2013 Volume 49(Issue 11) pp:3673-3680
Publication Date(Web):November 2013
DOI:10.1016/j.eurpolymj.2013.07.035
•Stereospecific radical polymerization of optically active (S)-HPEMA was realized.•A catalytic amount of the Lewis acid is enough to control the stereoregularity.•Solvents strongly influence the effect of Lewis acids on the tacticity of the polymer.•The polymerization in n-BuOH in the presence of La(OTf)3 shows the highest isotacticity.•The mechanism of stereocontrol was analyzed based on Lewis acid-monomer interaction.The effects of Lewis acids, namely, rare earth metal trifluoromethanesulfonates, on the radical polymerization of (S)-N-(2-hydroxy-1-phenylethyl) methacrylamide were examined under various conditions. In the absence of Lewis acids, syndiotactic-rich polymers (r = 84%) were obtained, whereas in the presence of a catalytic amount of Lewis acids, the polymerization proceeded in an isotactic-specific manner (m up to 64%). Polymerization solvents strongly influenced the effect of the Lewis acids. The polymerization in n-butyl alcohol showed the highest isotactic selectivity, whereas the polymerization in DMSO showed no isotacticity-enhancing effect. Further increases in the Lewis acid concentration and the polymerization temperature did not produce clear effects on the tacticity of the polymers. The interaction between the monomer and Lewis acids was investigated, and the plausible mechanism of stereocontrol in the radical polymerization of (S)-HPEMA was analyzed based on the Lewis acid-monomer interaction.Graphical abstract
Co-reporter:Xiaodong Xu, Meng Zhang, Jing Feng, Milin Zhang
Materials Letters 2008 Volume 62(17–18) pp:2787-2790
Publication Date(Web):30 June 2008
DOI:10.1016/j.matlet.2008.01.046
Co-reporter:Xinxin Li, ;Yuanyuan Dan;Jing Feng;Lan Ge ;Milin Zhang
Crystal Research and Technology 2008 Volume 43( Issue 10) pp:1062-1068
Publication Date(Web):
DOI:10.1002/crat.200800040
Abstract
Lysozyme crystallization was conducted in the ionic liquid (IL) 1-butyl-3-methylimidizolium tetrafluoroborate ([BMIm][BF4]) with different buffer/IL proportions. It was found that the addition of [BMIm][BF4] could promote the crystallization process, during which more lager single crystals with controllable morphologies could be obtained due to the manageable crystal growth velocity. A probable explanation was proposed based on the influence of the ionic polarization and kinetics in the lysozyme crystallization. Moreover, the transform in coordination number and the relative growth rate of different crystal faces were discussed. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
