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Polydimethylsiloxane (PDMS) is a mineral-organic polymer of the siloxane family, often referred to as silicone. It consists of repeating dimethylsiloxane groups and has a chemical structure of [−Si(CH₃)₂O−] n, PDMS has the following characteristics:
Stability: PDMS has excellent chemical stability and does not react easily with other substances.
Transparency: It is colorless and transparent and is typically used in applications requiring optical transparency.
Heat and cold resistance: PDMS has good thermal stability and can operate stably over a wide temperature range.
Biocompatibility: Due to its inertness and low toxicity, PDMS is widely used in biomedical applications.
Wide range of applications: PDMS is used in microfluidic chip manufacturing, sealing materials, coatings, cosmetics, food industry and many other fields.
| Poly(dimethylsiloxane) Basic information | |
| Product Name | Poly(dimethylsiloxane) |
| Synonyms | silicon oil, polydimethylsiloxane, PDMS, dimethicone, dimethylpolysiloxane, E900, polymerized siloxane |
| CAS | 9016-00-6 |
| Molecular Formula | [−Si(CH₃)₂O−]n |
| Molecular Weight | 94.18664 |
| EINECS | 618-493-1 |
| Poly(dimethylsiloxane) Chemical Properties | |
| Melting point | -35°C |
| Boiling point | 155-220°C |
| Density | 0.971 |
| Storage temp | Refrigerator |
| Solubility | Chloroform (Slightly), Methanol (Slightly) |
| Form | Viscous Liquid |
| Color | Colorless |
| Specific Gravity | 0.918 |
| Refractive Index | 1.4035 |
| Poly(dimethylsiloxane) Safety Information | |
| Risk Statements | 36/37/38 |
| Safety Statements | 24/25 |
| RIDADR | 1993 |
| WGK Germany | 2 |
| RTECS | TQ2690000 |
| Hazard Class | 3 |
Electronic and electrical industry: PDMS is commonly used in applications such as electronic plugs and insulating oils because of its good electrical insulation properties.
Microfluidics and biomedical field: Due to its excellent biocompatibility and breathability, PDMS is widely used in applications such as lab-on-a-chip and tissue engineering.
Cosmetics and personal care: In cosmetics, PDMS is used as a softener and emulsifier in hair conditioners and skin care products because it provides a smooth feel and good spreading effect.
Industrial Lubrication and Mold Release: PDMS is used as a lubricant and mold release agent because of its chemical inertness and low surface tension, which effectively prevents adhesion.
Coatings and Surface Treatments: PDMS is used in coatings to improve surface smoothness and chemical resistance. It is also used in coatings for cookware such as non-stick pans.
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