DSC and SWAXS Studies on the Effects of Silk Nanocrystals on Crystallization of Poly(l-Lactic Acid)
DSC and SWAXS Studies on the Effects of Silk Nanocrystals on Crystallization of Poly(l-Lactic Acid)
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DSC和SWAXS研究丝纳米晶对聚L-乳酸结晶影响
DOI：
10.1007/978-981-15-1251-3_14
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Sakurai Shinichi
中科院分区：
文献类型：
--
作者：
Pandey Amit Kumar;Diep Pham Thi Ngoc;Patwa Rahul;Katiyar Vimal;Sasaki Sono;Sakurai Shinichi
聚l-乳酸（PLLA）由于其良好的力学性能是最常用的生物基聚酯之一。但其结晶速度慢、结晶度低等特性限制了其商业应用。为了克服这些限制，有机纳米填料被加入到pla基质中。本文报道了利用蚕茧废料在实验室制备的蚕丝纳米晶（SNC）作为固态成核剂。以二氯甲烷为铸造溶剂，采用溶液铸造法制备了SNC含量为1.0 wt%的PLLA/SNC复合材料。用差示扫描量热法（DSC）和小角和广角x射线散射（SWAXS）研究了熔体在110℃（200℃，5 min）淬火时的等温结晶动力学。结果发现，加入1.0 wt%的SNC后，诱导期缩短，结晶速度加快，结晶度终值增大，片层增厚加速。这些实验结果可以解释为SNC的加载使聚合物链具有规则的折叠。
Poly (l-lactic acid) (PLLA) is one of the most frequently used biobased polyesters due to its favorable mechanical properties. However, some properties such as slow crystallization rate and low crystallinity restrict its commercial uses. In order to overcome these limitations, organic nanofillers are incorporated into the PLLA matrix. Herein, we report the use of silk nanocrystal (SNC) as a solid-state nucleation agent, which has been prepared in the laboratory from the wastes of the muga silk cocoon. PLLA/SNC composites with 1.0 wt% loadings of SNC have been prepared by solution casting with dichloromethane as a cast solvent. Isothermal crystallization kinetics at 110 °C has been studied by the differential scanning calorimetry (DSC) and small- and wide-angle X-ray scattering (SWAXS) upon quenching from melt (200 °C for 5 min). As a result, it is found that loading SNC with 1.0 wt% caused the reduction of the induction period, the acceleration of crystallization, the increase of the final value of the degree of crystallinity, and the acceleration of lamellar thickening. These experimental results can be explained by the fact that the regular folding of the polymer chains is attained by the loading of SNC.
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影响因子：
5.5
作者：
Tomoko Fujiwara;M. Miyamoto;Y. Kimura;T. Iwata;Y. Doi
通讯作者：
Tomoko Fujiwara;M. Miyamoto;Y. Kimura;T. Iwata;Y. Doi
光子工厂小角度 X 射线散射光束线 BL-6A 的开发
DOI：
--
发表时间：
2012
期刊：
影响因子：
--
作者：
Shimizu;N.;Mori;T.;Igarashi;N.;Ohta;H.;Nagatani;Y.;Kosuge;T. and Ito;K.
通讯作者：
K.
丝素蛋白纳米盘增强聚L-乳酸等温结晶过程中的结构演化
影响因子：
3.4
作者：
Pandey Amit Kumar;Katiyar Vimal;Takagi Hideaki;Shimizu Nobutaka;Igarashi Noriyuki;Sasaki Sono;Sakurai Shinichi
通讯作者：
Sakurai Shinichi
增塑剂用量对聚L-乳酸结晶改善的影响
影响因子：
0.6
作者：
Thi Ngoc Diep Pham;Takagi Hideaki;Shimizu Nobutaka;Igarashi Noriyuki;Sasaki Sono;Sakurai Shinichi
通讯作者：
Sakurai Shinichi
聚(d,l-丙交酯)/聚(氧乙烯)共混物中聚(氧乙烯)的高阶晶体结构
影响因子：
4.6
作者：
N. Tien;T. Hoa;M. Mochizuki;K. Saijo;H. Hasegawa;S. Sasaki;S. Sakurai
通讯作者：
S. Sakurai