In-situ stirring and continuous sampling device of small-angle neutron scattering spectrometer

Abstract

The invention discloses an in-situ stirring and continuous sampling device applicable to a small-angle neutron scattering spectrometer. In the device, a sample plate welded with a cuvette pool and with a neutron incident hole is driven to move in a timing and positioning way by a servo motor controlled by a computer so as to achieve the purpose of automatic and continuous sampling. A cuvette loaded with a sample and a magnetic stirrer is placed in the cuvette pool, a magnetic stirring device is controlled to drive the magnetic stirrer to continuously stir at different rotational speeds by thecomputer, so that continuous stirring of a sample is achieved as well as automatic and continuous sampling is achieved. With the in-situ stirring and continuous sampling device provided by the technical scheme of the invention,in-situ structure evolution test of colloid with small-angle neutron easy to coagulate and settle down and particle dispersion sample can be achieved; and moreover, the in-situ stirring and continuous sampling device has the advantages of settling prevention, displacement accuracy, automation, labor saving and the like, is simple to install and easy to disassemble and isapplicable to microstructure evaluation test of systems easy to coagulate such as the colloid and the particle dispersion system in small-angle neutron scattering research.

Description

technical field [0001] The invention belongs to the technical field of in-situ automatic measurement of neutron scattering, and in particular relates to an in-situ stirring continuous sampling device for a small-angle neutron scattering spectrometer. Background technique [0002] Small-angle neutron scattering is a special method for studying the structure of matter in the range of several to hundreds of nanometers by analyzing the scattering intensity of long-wavelength neutrons (about 0.2-2nm) in a small angle range (below about 2°). measurement technology. Therefore, small-angle neutron scattering technology can be used for in-situ detection of polymers, biomacromolecules, and colloidal solutions. [0003] In the study of materials such as soft matter (polymers, biomacromolecules, gels, etc.), the small-angle neutron scattering method has unique advantages in deuterium labeling and contrast changes. Utilizing the ability of neutrons to distinguish hydrogen and deuterium...

AI Technical Summary

Problems solved by technology

However, the time resolution of neutron scattering has been limited by the beam intensity

For concentrated colloidal dispersions with weak signals, or insoluble nanoparticles, long-term experiments will lead to coagulation of colloids or sedimentation of particles, making the experiment impossible

[0004] At present, the neutron dispersion (diffraction) technology in China is in its infancy, and there is no such supporting device designed and developed for neutron dispersion (diffraction) spectrometers with continuous sample feeding and stirring functions.

However, X-rays are not suitable for studying the conformation of a single molecular chain, and no similar explorations based on synchrotron radiation light sources and commercial light sources have been found.

Although the international community attaches great importance to the development and application of small-angle neutron scattering technology, some shear rheological devices on small-angle neutron scattering platforms have been able to achieve neutron scattering tests under stirring conditions, but such devices are not suitable for the required samples. The amount is large, manual sample change is required, and continuous sample delivery is not possible

Especially for samples with many categories and a small amount of samples, the test work cannot be completed efficiently or even

Images