Chinese Academy of Sciences

Shandong University

Jilin Core Logistics and Coating Equipment Co., Ltd.

Shandong Gelnnt Environmental Technology Co., Ltd.

Changchun Institute of Applied Chemistry

Changchun Institute of Applied Chemistry Chines Academy of Sciences

Lijia An

Shichun Jiang

Daocheng Pan

Xiangling Ji

Qiang Wang

Linlin Gao

Yuxi Jia

Weiguo Yao

Qingmei Sui

Mingshun Jiang

Qinglin Wang

Guoshun Wan

Bingzheng Jiang

Haiqing Wang

Hui Ye

Jieying Zhi

Leida Zhang

Yaru Zhao

Yunli Guo

Nana Zhao

A fiber grating sensor insert, implanting system and method of an intelligent plastic pipe. A fiber grating sensors' strip-shaped insert is accurately implanted in an oblique guiding manner in the pipe's outer surface during the continuous extrusion molding process of the plastic pipe, so that temperature and strain sensors implanted beforehand in strip-shaped insert are buried in the pipe, and the sensors' survival in a bad pipe manufacturing and working environment is ensured, real-time online monitoring on parameters of the pipe such as temperature, strain, pressure and the like is achieved, the conventional continuous extrusion process technology of plastic pipes is combined with optical fiber communication technology, and the manufactured intelligent plastic pipe can achieve real-time online monitoring of temperature, strain, pressure and other parameters, and then can realize the safety early warning, fault diagnosis and automatic control of urban pipe networks, thereby effectively promoting the construction of 'smart cities'.

Fiber grating sensor insert, implanting system and method of intelligent plastic pipe

A composite material packaged fiber grating sensor and a manufacturing method thereof. The sensor includes a fiber grating sensor component, a composite material coverage layer, a resin package layer and a composite material substrate layer. In the sensor, a temperature fiber grating and a strain fiber grating are packaged in a composite material structure, so that the structure is light and simple, its computability with the composite material is good, the measurement accuracy is high, and the survival rate and the service life of the installed sensor can be greatly improved, the sensor component can be externally pasted on to or inter-implanted in a composite material structural part, and can be applied to the distributed online health monitoring on the structural part. The manufacturing method of the composite material packaged fiber grating sensor is simple, efficient and stable, and is suitable for rapid mass production by enterprises.

Composite material packaged fiber grating sensor and manufacturing method thereof

The present invention belongs to a method for preparing organic ligand-capped titanium dioxide nanocrystals, wherein the method comprises steps of using methyl titanate, ethyl titanate, n-propyl titanate, iso-propyl titanate, butyl titanate or titanium tetrachloride as a titanium source, and with capping by oleic acid or an organic capping agent, reacting the titanium source in an organic non-polar solvent with an aqueous alkaline substance solution in the interface at a temperature of 25 to 280&#xb0; C. for 0.5 to 240 hrs, thus a transparent sol containing titanium dioxide nanocrystals is obtained, said the titanium dioxide nanocrystals have particle diameters of 1-20 nm. The preparing process has the features of mild reaction conditions and is a simpler and easier method with a shorter preparation period, thereby facilitating the industrialization.

Method for preparing organic ligand-capped titanium dioxide nanocrystals

The present invention provides a process for producing a nanosemiconductor luminous material on a liquid-liquid interface, comprising the steps of: a) an oxide of a Group IIB metal and a carboxylic acid with 2-18 carbon atoms or an oleic acid reacting with each other in a solvent at 150-300&#xb0; C. for 5-30 min, wherein the mol ratio of the oxide to the acid being 1&#x2dc;5:5&#x2dc;1; b) adding trioctylphosphine oxide and trioctylphosphine with a mol ratio of trioctylphosphine oxide to trioctylphosphine of 10&#x2dc;1:1&#x2dc;10 and a mol ratio of the total mol numbers of trioctylphosphine oxide to the oxide of 10&#x2dc;1:1&#x2dc;10; c) adding an aqueous solution of at least one alkaline/alkaline earth metal chalcogenide in a mol ratio of the chalcogenide to the oxide of 10&#x2dc;1:1&#x2dc;10; and d) reacting at 20-100&#xb0; C. for 0.5&#x2dc;10 h to obtain a sol containing a semiconductor nanoparticle. The produced semiconductor nanoparticle can emit a wavelength-adjustable visible light under a UV lamp.

Liquid-liquid interfacial synthetic method for nanosemiconductor luminous material

A two-phase thermal method for the preparation of cadmium sulfide quantum dots where a cadmium source, a sulfur source and a capping agent are heated in water and water-insoluble organic solvents forming a two-phase system. By means of varying reaction time, cadmium sulfide quantum dots of different sizes can be prepared. Quantum dots already obtained can be used as crystal seeds in the reaction of newly added reaction precursor to give larger sized quantum dots with a size distribution similar to that of the initial crystal seeds so as to realize the control of quantum dot size. The quantum dots obtained in the present invention have relatively narrow size distribution, and emit royal purple or blue light under ultraviolet lamp, with a photoluminescence quantum efficiency of from 3 to 60%.

Two-phase thermal method for preparation of cadmium sulfide quantum dots

Growing community of inventors

Changchun, China

Lijia An