检索结果-南通市图书馆

A polarization method for quickly distinguishing the morphology of electro-spun ultrafine fibers

Chinese Chemical Letters 2018年第8期29卷 1317-1320页

作者： Xiaopeng Li Yuanhuan Zhu Hui Ma Yong Sheng School of Materials Science and Engineering Sichuan University Center for Precision Medicine and Healthcare Tsinghua-Berkeley Shenzhen Institute Tsinghua University Shenzhen Key Laboratory for Minimal Invasive Medical Technologies Institute of Optical Imaging and Sensing Graduate School at Shenzhen Tsinghua University Department of Physics Tsinghua University

In the fields of tissue engineering and controlled drug release, electro-spun fibers are often required to have structural characteristics such as high porosity and large specific surface area. The traditional scanning electron microscope can observe the microscopic appearance of the sample clearly, but it damage to the polymer electro-spun fiber, and the detection takes a long time. In view of this, we have tested a polarization method to quickly distinguish different morphological features of the samples, such as smooth surface, microporous, and beaded microspheres using the depolarization parameter MMDD-△,which is obtained by the Mueller matrix polar decomposition. The preliminary results show that this method is simple, fast, and potentially capable of non-destructive evaluation of the microstructure properties of the object surface.

关键词： Electrospinning ultrafine fiber Polarized light Nondestructive testing Mueller matrix

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Electrospun Food-Grade ultrafine fibers from Pectin and Pullulan Blends

引用

Food and Nutrition Sciences 2016年第7期7卷 636-646页

作者： Shih-Chuan Liu Ran Li Peggy M. Tomasula Ana M. M. Sousa Linshu Liu Dairy and Functional Foods Research Unit Eastern Regional Research Center Agricultural Research Service US Department of Agriculture Wyndmoor PA USA School of Diet and Industry Management Chung-Shan Medical University and Department of Nutrition Chung Shan Medical University Hospital Taiwan State Key Laboratory of Hollow fiber Materials and Processes School of Materials Science and Engineering Tianjin Polytechnic University Tianjin China

Electrospinning was used to produce ultrafine fibers and fibrous mats from aqueous solutions containing two edible polysaccharides: pectin (PEC) and pullulan (PUL). The process excluded the use of a synthetic carrier polymer or non-aqueous solvents thus maintaining the food-grade status of the components. The inclusion of PUL reduced the surface tension and electric conductivity of pectin solution, and promoted molecular entanglement between PEC and PUL as confirmed by rheological analysis. The spinnability of either polysaccharide was promoted by inclusion of the other. Cross-linking PEC networks were obtained by soaking the fibrous mats in successive Ca2+ solution. The fibrous mats can be used to carry bioactive compounds as demonstrated using probiotic bacteria Lactobacillus rhamnosus GG (LGG) as a model bioactive compound. The research is significant for the development of food products with unique textures and functionalities.

关键词： Food Processing ultrafine fiber Pectin Pullulan Lactobacillus Rhamnosus GG (LGG) Functional Foods

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Formation of ultrafine Apatite fibers by Sol-gel/Electrospinning

引用

Chemical Research in Chinese Universities 2007年第3期23卷 366-369页

作者： DING Ya-mei YUAN Xiao-yan ZHAO Jin GUO Wan-chun WANG Xiu-kui School of Materials Science and Engineering Tianjin University Tianjin 300072 P. R. China

ultrafine apatite fibers were prepared by electrospinning of sol-gel precursor/poly（ vinyl pyrrolidone）（PVP） solutions followed by subsequent calcination. The as-electrospun and calcinated fibers were observed under a scanning electron microscope and an optical polarizing microscope. Results show that the morphology and the diameter of as-electrospun fibers strongly depend on the viscosity and the surface tension of sol-gel precursor/PVP solutions. After calcination, the smooth as-electrospun fibers shrink and the fiber diameter decreases because of the removal of the polymer. The chemical evolution upon the transformation of the precursor from a gel to the final apatite fibers was investigated by thermogravimetric-differenfial thermal analysis, X-ray diffraction, and Fourier transform infrared spectroscopy. It is thus suggested that the crystalline structure of the calcined fibers is largely influenced by the calcination temperature. After being calcined at 600 ℃, the apatite fibers with a diameter of about 280 nm containing β-tricalcium phosphate were obtained.

关键词： Apatite ultrafine fiber Sol-gel Electrospinning

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

静电纺丝制备壳聚糖/聚乙烯醇超细纤维的研究

静电纺丝制备壳聚糖/聚乙烯醇超细纤维的研究

引用

2004年全国高分子材料科学与工程研讨会

作者：张园园黄小波袁晓燕天津大学材料科学与工程学院天津大学材料科学与工程学院天津大学材料科学与工程学院

＜正＞静电纺丝是制备超细纤维的一种重要方法,得到的电纺纤维具有直径小（几纳米至几微米）、比表面积高等特点。静电纺丝过程是将具有一定粘度的高分子溶液或熔体置于带有金属毛细管喷头的装置中,在高压电场的作用下,处于喷口的液滴... 详细信息

＜正＞静电纺丝是制备超细纤维的一种重要方法,得到的电纺纤维具有直径小（几纳米至几微米）、比表面积高等特点。静电纺丝过程是将具有一定粘度的高分子溶液或熔体置于带有金属毛细管喷头的装置中,在高压电场的作用下,处于喷口的液滴克服表面张力形成喷丝细流,在到达接收装置之前,细流不断分裂细化及溶剂挥发,最后形成电纺纤维。若液体在连续的推动供给下,可得到一定厚度的超细纤维膜。

关键词： electrospinning chitosan poly(vinyl alcohol) spinnability ultrafine fiber

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：