Controllable fabrication of porous PLGA/PCL bilayer membrane for GTR using supercritical carbon dioxide foaming
Controllable fabrication of porous PLGA/PCL bilayer membrane for GTR using supercritical carbon dioxide foaming
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利用超临界二氧化碳发泡可控制备 GTR 多孔 PLGA/PCL 双层膜
DOI:
10.1016/j.apsusc.2018.04.059
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发表时间:
2019-04
影响因子:
6.7
通讯作者:
Cen Lian
中科院分区:
文献类型:
--
作者:
Song Chaobo;Li Shuang;Zhang Jiapeng;Xi Zhenhao;Lu Eryi;Zhao Ling;Cen Lian
In present study, an efficient solvent-free foaming method aided by supercritical carbon dioxide (sc-CO2) is developed to prepare porous PLGA/PCL bilayer membranes for potential guided tissue regeneration (GTR) applications. First rheological properties and foaming behaviors of PLGA and PCL were studied in detail. Compared with PLGA, PCL had lower viscosity with loss tangent tan δ over 1 thus got bigger and highly interconnected pores after foaming. Based on this, membranes with distinct porous PCL and PLGA bilayer were prepared via a one-step foaming. SEM showed the pore size of the PCL layer was 80–100 μm, and that of the PLGA layer was less than 10 μm. Through tensile tests these membranes exhibited a tensile strength of 4.02 MPa and a elongation at break of 57.7 %, meeting the mechanical requirements of GTR. Further cell tests demonstrated that the PCL layer suited for the proliferation of osteoblasts and the PLGA layer inhibited the ingrowth of fibroblasts. The porous PLGA/PCL bilayer membranes fabricated using this one-step foaming meet the requirements of GTR and possess great commercial potential.
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