Instructions for use of TEMPO oxidized nanocellulose

TEMPO-Oxidized Nanocellulose (TOCNF) is prepared by selective oxidation of cellulose by Because the surface of this material contains a large amount of carboxy groups, it has high hydrophilicity, charge density and excellent mechanical properties, and has a wide range of applications in composite materials, thickeners, biomedical, coatings and electronic devices. The following are instructions for using TEMPO oxidized nanocellulose:TEMPO (2,2,6,6-tetramethylpiperidine oxide) as a catalyst.

1. Storage and processing

• Storage conditions : TEMPO oxidized nanocellulose should be stored in a dry and cool environment to avoid direct sunlight and moisture. Especially in the form of dry powder, it should be stored in an airtight container to prevent moisture absorption. If it is in the form of a suspension, it is recommended to store it in a low temperature environment around 4°C.

• Treatment method : When treating TEMPO oxidized nanocellulose, especially in powder form, protective gloves and masks should be worn to prevent inhalation or direct skin contact. The suspension should be operated in a clean environment to prevent contamination.

2. Dispersion and preparation

• Dispersant selection : TEMPO oxidized nanocellulose usually has good dispersion in water to form a stable suspension. In general, even dispersion is not required without additional dispersant. However, when dispersing in non-aqueous solvents, it may be necessary to use surfactants.

• Preparation method : TEMPO oxidized nanocellulose can be evenly dispersed in water or other solvents through mechanical stirring, high shear stirring or ultrasonic treatment. During the dispersion process, the processing time and stirring speed can be adjusted according to the specific application requirements to ensure uniform dispersion.

3. Application method

• Composite material reinforcement : TEMPO oxidized nanocellulose is dispersed in a polymer matrix, and composite materials with enhanced properties are prepared through mixing, casting or injection molding processes. The mechanical strength and heat resistance of the material can be significantly improved.

• Thickener : Due to the high viscosity properties of TEMPO oxidized nanocellulose, it is often used to thicken water-based coatings, gels or emulsions. By adjusting the cellulose concentration, the viscosity and rheology of the system can be controlled.

• Biomedical Applications : TEMPO oxidized nanocellulose can be used in wound dressings, drug carriers or tissue engineering stents due to its high biocompatibility. Before use, ensure that the material is sterile and may require further chemical modification of its surface.

• Electronic devices and conductive films : In the field of electronic devices, TEMPO oxidized nanocellulose can be used to make flexible conductive films, transparent electrodes or other functional films. It can be prepared by coating, printing or spraying processes to exhibit good conductivity and flexibility.

4. Safety and environmental considerations

• Biodegradability : TEMPO oxidized nanocellulose is a natural cellulose derivative with good biodegradability and environmental friendliness, suitable for use in the fields of environmentally friendly materials and biomedical.

• Waste treatment : TEMPO oxidized nanocellulose after use should be treated in accordance with laboratory or industrial standards. It is recommended to treat harmlessly through biodegradation or incineration to avoid pollution to the environment.

5. Quality control

• Particle size and distribution detection : The particle size and distribution of TEMPO oxidized nanocellulose are detected by transmission electron microscopy (TEM) or dynamic light scattering (DLS) to ensure its uniformity and consistency of performance.

• Dispersion stability detection : Regularly detect the dispersion state of TEMPO oxidized nanocellulose suspension to ensure its stability and dispersion during use.

• Viscosity measurement : Use a rheometer to measure the viscosity of TEMPO oxidized nanocellulose to ensure consistent performance in applications.

6. Things to note

• TEMPO oxidized nanocellulose is easy to absorb moisture, and you should pay attention to moisture-proof when using it, especially in powder form.

• If precipitation or stratification occurs in the suspension, its uniformity should be restored by stirring or ultrasonic treatment before use.

• In composite materials or other applications, the concentration and dispersion state of TEMPO oxidized nanocellulose should be adjusted according to specific needs to obtain optimal performance.

These instructions can help you effectively use TEMPO oxidized nanocellulose in a variety of applications. If you have more questions or specific application requirements, please feel free to discuss further!