Método de detección por RMN pulsada de lubricación de fibras

Pulsed NMR also called Time domain NMR or Low field NMR

The purpose of applying an appropriate amount of oil in the fiber production process is to make the fiber antistatic, bundled and smooth, so as to facilitate post-processing. Uneven oiling of fibers will cause quality problems such as uneven evenness and wool. Oiling the fibers too high is a waste of money. Además, in the production of spandex, the fiber oiling detection is not accurate, and the concentration and use time of the degreasing agent Ccl4 cannot be accurately determined, and Ccl4 is very destructive to spandex, which will make spandex brittle and lose its high elasticity. Por lo tanto, it is necessary to accurately measure the oiling rate of fibers.

Pulsed NMR Method Compare with Extraction Method

The traditional extraction method takes 5 a 6 hours for one measurement, while chemical fiber production is continuous and high-speed production, and problems cannot be controlled in time. Al mismo tiempo, this method is costly and consumes a lot of reagents and labor. The pulsed NMR method has the advantages of being fast, no destructivo, verde, and does not consume chemical reagents. Just take a small amount of fiber and put it in the probe to test, and the result can be obtained in ten seconds. The benefits it brings are:

The pulsedNMR measurement test is fast;
The calibration of the pulsedNMR measuring instrument is simple;
Comparado con el método tradicional., thepulsedNMR measurement has much better repeatability and reproducibility;
PulsedNMR measurement can be used for quality inspection and quality control in the industrial production process, Ahorrar mano de obra y mejorar significativamente la eficiencia.;
The pulsedNMR measuring instrument is easy to operate, no requiere personal técnico, y es fácil de operar por personal no capacitado;
The pulsedNMR measurement function is powerful, Adecuado para la prueba del contenido de flúor de fibras y productos textiles.;
The pulsedNMR measurement has no requirements on the shape of the sample, y la muestra puede ser polvo, gránulo, película o bloque.
The pulsedNMR measurement is a non-invasive and non-destructive test, y la misma muestra se puede medir repetidamente según sea necesario;
The NMR signal of pulsedNMR measurement is generated by all hydrogen nuclei in the entire sample volume, Y el resultado de la prueba no depende de la superficie de la muestra ni del color de la muestra.;
Pulsed NMR measurement can be used for 1H content testing in some raw materials and chemical products;
PulsedNMR measurement can be used for oil and water content testing in other chemical products;