Analysis of Nanocellulose by Diffusing wave spectroscopy (DWS) (CAT#: STEM-MB-0858-WXH)

Introduction

Nanocellulose is a light solid substance obtained from plant matter which comprises nanosized cellulose fibrils. This new material is a pseudo-plastic and possesses the property of specific kinds of fluids or gels that are generally thick in normal conditions. The lateral dimensions of nanocellulose range from 5 to 20 nm, and the longitudinal dimension ranges from a few 10's of nanometers to several microns.
Nanocellulose has a wide range of applications, from cleaning of oil spills to usage in children’s toys. Nanocellulose can be used in pharmaceutical, food and medical industries. This new material can also replace some petrochemical-based products and is very likely to be cheaper than most other kinds of high-performance nanoscale materials.

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Principle Applications Procedure Materials Notes Related Products

Principle

Diffusing-wave spectroscopy (DWS) is an optical technique derived from dynamic light scattering (DLS) that studies the dynamics of scattered light in the limit of strong multiple scattering. DWS is able to give information about the local dynamics of particle dispersion in a highly turbid medium. It has been widely used in the past to study colloidal suspensions, emulsions, foams, gels, biological media, and other forms of soft matter. If carefully calibrated, DWS allows the quantitative measurement of microscopic motion in a soft material, from which the rheological properties of the complex medium can be extracted via the microrheology approach.
The technique of DWS depends on the scattering of light from highly turbid suspensions. A sample of the suspension is illuminated by light from a laser and the incoming photons are multiply scattered. This scattered light is detected and subjected to autocorrelation analysis.

Applications

• Diffusing Wave Spectroscopy (DWS) is an advanced light scattering technique, which is primarily applied for microrheology and particle sizing.
• DWS has been applied in biomedical and clinical areas, especially in monitoring cerebral blood flow (CBF).

Procedure

1. Sample Preparation
2. Diffusing Wave Spectroscopy Testing
3. Data analysis

Materials

• Diffusing wave spectroscopy (DWS) instrument
• DWS RheoLab

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