Blog

High-Efficiency Grinding Solution for Fibrous Sample Preparation

Globally, cotton fiber is a widely used natural plant fiber, extensively applied in medical, textile, and industrial fields. Among these, medical-grade degreased cotton is an essential healthcare material due to its excellent absorbency, biocompatibility, and safety, making it ideal for wound cleaning, dressing, and protection.

Degreased cotton is typically produced from raw cotton through multiple processes, including impurity removal, degreasing, bleaching, washing, and drying. Its fiber structure features high toughness, high strength, and strong entanglement, which presents a key challenge in sample preparation—how to efficiently grind it into uniform and controllable particle sizes for downstream analysis or material development.

Challenges in Degreased Cotton Sample Preparation

In practical applications, processing degreased cotton involves several difficulties:

High fiber toughness makes complete grinding difficult

Fluffy structure tends to entangle and affect equipment performance

Uneven particle size impacts experimental reproducibility

Low efficiency in large-scale sample processing

To address these challenges, Welso offers an ultra centrifugal grinding solution designed for efficient and reliable fibrous sample preparation.

Key Advantages of the Ultra Centrifugal Mill

1. High-Speed Shear for Efficient Grinding

The instrument utilizes a high-speed rotor system operating up to 12,000 rpm. Combined impact and shear forces rapidly break down cotton fibers, enabling a fast “feed-and-exit” grinding process.

2. Continuous Feeding for Higher Throughput

The system supports continuous sample feeding, making it ideal for batch processing and significantly improving efficiency while reducing manual intervention.

3. Controllable Particle Size

By using interchangeable sieve rings with different mesh sizes, users can precisely control the final particle size, ensuring consistency across experiments.

Recommended Experimental Procedure

To achieve stable and reliable results, follow the steps below:

Step 1: Equipment Setup
Install a 0.01 mm metal sieve along with the collection tray, ensuring proper assembly.

Step 2: Parameter Setting
Set the rotation speed to 12,000 rpm and start the instrument.

Step 3: Cryogenic Pretreatment
Freeze the degreased cotton sample using liquid nitrogen to make the fibers brittle and improve grinding efficiency.

Step 4: Uniform Feeding
Feed the sample evenly and gradually into the inlet using appropriate tools to avoid overloading.

Step 5: Sample Collection
Stop the instrument once the grinding sound diminishes, then collect the processed powder.

Experimental Results

After processing with the ultra centrifugal mill, degreased cotton samples exhibit:

Thorough fiber breakdown

Uniform and stable particle size

No significant agglomeration

Suitability for further material development and analysis

Safety and Operation Notes

To ensure safe operation and optimal performance:

Wear proper protective equipment when handling liquid nitrogen to avoid frostbite

Handle sieve rings and rotor blades carefully due to sharp edges

Clean the instrument after each use to prevent clogging

Regularly inspect key components to maintain stable operation

Application Range

The ultra centrifugal mill is suitable for a wide variety of sample types, including:

Soft materials

Medium-hard substances

Brittle samples

Tough and fibrous materials

Its high-speed grinding mechanism enables rapid size reduction, making it especially suitable for complex structures and large-volume sample processing, demonstrating excellent versatility and adaptability.

In fibrous sample preparation, efficiency and particle size control are critical. The Welso ultra centrifugal mill provides a highly efficient and reliable solution with its high-speed grinding capability, continuous operation mode, and flexible particle size control.

If you are looking for a grinding solution for tough fibrous materials, Welso is committed to delivering professional and dependable support for your laboratory applications.