a. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
b. Department of Obstetrics and Gynecology, Affiliated Sixth People's Hospital, Shanghai Jiaotong University, Shanghai 200233, China
Shi-yan Chen(陈仕艳), E-mail:chensy@dhu.edu.cn
Qing-kai Wu(吴氢凯), E-mail:wuqingkai@sjtu.edu.cn
收稿:2016-07-28,
修回:2016-10-18,
录用:2016-10-18,
纸质出版:2017-03-25
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Yin Na, Chen Shi-yan, Cao Yi-meng, 等. Improvement in Mechanical Properties and Biocompatibility of Biosynthetic Bacterial Cellulose/Lotus Root Starch Composites[J]. Chinese Journal of Polymer Science, 2017,35(3):354-364.
Yin Na, Chen Shi-yan, Cao Yi-meng, et al. Improvement in Mechanical Properties and Biocompatibility of Biosynthetic Bacterial Cellulose/Lotus Root Starch Composites[J]. Chinese Journal of Polymer Science, 2017, 35(3): 354-364.
Yin Na, Chen Shi-yan, Cao Yi-meng, 等. Improvement in Mechanical Properties and Biocompatibility of Biosynthetic Bacterial Cellulose/Lotus Root Starch Composites[J]. Chinese Journal of Polymer Science, 2017,35(3):354-364. DOI: 10.1007/s10118-017-1903-z.
Yin Na, Chen Shi-yan, Cao Yi-meng, et al. Improvement in Mechanical Properties and Biocompatibility of Biosynthetic Bacterial Cellulose/Lotus Root Starch Composites[J]. Chinese Journal of Polymer Science, 2017, 35(3): 354-364. DOI: 10.1007/s10118-017-1903-z.
Bacterial cellulose/lotus root starch (BC/LRS) composites were prepared by cultivating Acetobacter xylinum in nutrient media containing gelatinized lotus root starch. Low concentrations of gelatinized LRS had increased BC production with the maximum value at 6.67 g/L when 5 g/L of LRS was added in the culture media and the composites had thicker and denser fibrils compared with those of BC with low concentrations of LRS (2.5 and 5 g/L). When the concentration of LRS was increased above 7.5 g/L
the morphology of the BC/LRS composites contained more fibril layers that were linked with LRS. The results from X-ray diffraction (XRD) demonstrated that there was no significant difference in structure between BC and BC/LRS composites except a slight increase in crystallinity for BC/LRS composites as the concentration of LRS was lifted up. The tensile tests were performed to display BC/LRS composites prepared with LRS concentration at 2.5 and 5 g/L in media had the tensile strength of 54 and 60 MPa
respectively
which indicated an improvement in mechanical property compared to the unmodified BC (45 MPa). Live/dead assay with chondrocytes seeded on BC/LRS composite revealed higher cell viability ranging from 85% to 90% than BC. Furthermore
cell morphology with typical spindle shape was observed on the surfaces of BC/LRS composite by confocal microscope. Through the overall results
it shows that this study has provided a guidance to prepare BC/LRS composites with better cell biocompatibility and higher mechanical strength than those of BC for the potential use in cartilage tissue engineering.
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