检索结果-南通市图书馆

The Influence of Pair Spiral Extrusion Equipment on Thermoplastic Potato Starch

合成化学 2004年第Z1期12卷 106-106页

作者： wang qing-ning 1, feng hui-xia 1, ye qi-zhi 2.1. college of petrochemical technology, lanzhou univ. of sic. and tech., gansu 730050, china 2. Information central for resources and environmental science, C.A.S., gansu 730000 china college of petrochemical technology Lanzhou Univ. of Sic. and Tech. Gansu 730050 China Information central for resources and environmental science C.A.S. Gansu 730000 China

Owing to contain a great deal of hydroxyl in Potato Starch, between the molecules and inside of molecules have very strong hydroxyl action. Thus, the liquate temperature is higher than disintegrate temperature, so it is difficult to process. Under the microscope, the microcosmic construction is a polar crystal molecule, and it appears globe *** make the original potato starch into possession thermoplastic, we must make molecule of starch to change construct into amorphous state to form thermoplastic starch colophony. Besides auxiliary agent, shearing stress, temperature, time, pressure and hydrous quantity can affect the quality of starch thermoplastic too. The pair spiral extrude machine is used widely as the machines that are based of the pressure difference, and this extrude course may suffice *** the machine of pair spiral extrude of specific combination in the test of thermoplastic starch, the potato starch can be turned into thermoplastic starch of denaturalization preferably under auxiliary agent, shearing stress, temperature, pressure and the certain hydrous *** the action of the technology process condition and the spiral combination, potato starch grains expand and fragmentate; hydroxyl bond cleave between and inside of molecules. Thus, crystallize state is changed into amorphous state. The transmutation of starch molecule property may be seen clearly from X diffraction chart and analyses of the construction property,By means of the denaturation, the crystal area of potato starch is broken,its crystallization degree is decreased,and its molecular chains are in amorphous state. The hydrogen bond among the molecular chain is broken or removed so that the starch structure is changed, making the starch *** processing of thermoplastic starch advances a higher requirement of ingredient water content, and tech.ical conditions. A remodeled twin-screw extruder is used to create an environment to realize the condition of de

关键词： thermoplastic starch, thermoplastic process, machine of pair spiral extrude.

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

Study on Properties and Synthesize of a new Polymeric Aluminum Sulfate-silicate

引用

合成化学 2004年第Z1期12卷 137-137页

作者： Yu Shu-rong wang qing-ning Zhang Fei-long ye qi-zhi college of petrochemical technology Lanzhou Univ. of Sic. and Tech. Gansu 730050 China 　　 Information central. For resources and environmental science C.A.S. Gansu 730000 China

The polymeric basic.aluminum silicate-sulfate can be made from three substances, such as aluminum sulfate, sodium silicate and sodium aluminates. Adoption sort neote ric one synthesis,under high shear mixing condition to produce polymeric Aluminum Sulfate-silicate--inorganic macromolecule flocculants, that is liquid, PH is 3.0, molecular formula: AlA (OH) B (SO4) C (SiOx)Because inorganic macromolecule have capability of electricity neutralized, bigger molecular mass,strong capability of adsorption, and products are relative stabilize, more economical than organic macromolecule flocculants, innocuity and high effect compared with tradition *** can use the flocculants to make sewages purified .The sewages contain sulfur, oiliness, which are treated sewages of oil refining to organism treatment sump in parturition course of oil refining,and the sewages of dark and white in parturition course of paper mill. We study the properties of the flocculants, change of CODCr and effect of sewerage decolouring and so *** fig. Can be seen to add the flocculants(0.1ml) to the sewages of the oil refining and the paper mill that effect is not distinctly. yet increase of quantity to remove turbidity and floccules effect is distinctness. When the flocculants (0.5mi) be added to the dark sewage of, the penetrate light rate attain 90～98%, the sewage of the oil refining is about 90%, but when we make floccules experiment, the color of dark green and auras of the sewages of oil refining and the paper mill are all disappear, the PASS that add to the sewage will have certainly time to flocculate. When use pay attention to quantity and horary the *** a result in the sewages purified, those products form quickly, granule density is big, and subsided velocity is quickly, Floccules effect and capability of removing turbidity, removing CODCr are ascendancy than tradition flocculants - aluminates, and the remained aluminum of water treatment is little. It has preponderanc

关键词： Polymeric basic aluminum silicate-sulfate flocculants, Sewerage treatment

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

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

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

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：