CAS 919-30-2 Coupling Agent And Surface Modifier 3-Aminopropyltriethoxysilane APTES

CAS 919-30-2 Coupling Agent And Surface Modifier 3-Aminopropyltriethoxysilane APTES

• 3-Aminopropyltriethoxysilane (APTES) Description

  3-Aminopropyltriethoxysilane (APTES) is an organosilane compound with both amine and ethoxy functional groups. It is widely used as a coupling agent, surface modifier, or adhesion promoter in various industries, including coatings, adhesives, and materials science. APTES hydrolyzes in the presence of water to form silanol groups, which can bond to inorganic surfaces like glass, silica, or metal oxides, while the amine group reacts with organic materials.

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  Technical Data Table

  Property	Description
  Chemical Name	3-Aminopropyltriethoxysilane
  Chemical Formula	C9H23NO3Si
  CAS Number	919-30-2
  Molecular Weight	221.37 g/mol
  Appearance	Colorless to pale yellow transparent liquid
  Odor	Ammoniacal odor
  Boiling Point	~217°C (at 760 mmHg)
  Flash Point	~96°C
  Density	~0.946 g/cm³ at 25°C
  Solubility	Soluble in organic solvents (e.g., ethanol, isopropanol); hydrolyzes in water
  Viscosity	~2 cP at 25°C
  Reactivity	Reacts with water, forming silanol groups
  pH Stability	Stable in neutral to acidic conditions; rapidly hydrolyzes in alkaline pH
  Shelf Life	1 year under proper storage conditions
  Storage	Store in a cool, dry place, tightly sealed, away from moisture and heat

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  Key Features

  1. Coupling Agent:

     • Bonds organic polymers to inorganic surfaces (e.g., glass, ceramics, metals) by forming covalent bonds.

  2. Surface Modification:

     • Creates amine-functionalized surfaces, enabling further reactions or improving surface properties (e.g., adhesion, compatibility).

  3. Hydrolyzable Silane:

     • Hydrolyzes in the presence of water to generate silanol groups that can react with hydroxyl groups on surfaces.

  4. Versatile Chemical Reactivity:

     • The primary amine group reacts with carboxylic acids, epoxides, or isocyanates, allowing for use in cross-linking and functionalization.

  5. Thermal Stability:

     • Stable under standard conditions, making it suitable for a wide range of industrial applications.

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  Applications

  1. Surface Treatment

  • Glass, Silica, and Metal Oxides:
    • Used to modify surfaces for better adhesion of polymers, coatings, and films.
  • Nanoparticles:
    • Functionalizes nanoparticles for applications in drug delivery, catalysis, and material science.

  2. Adhesives and Sealants

  • Adhesion Promoter:
    • Enhances the bonding between organic resins and inorganic surfaces in adhesives and sealants.

  3. Coatings

  • Anti-Corrosion Coatings:
    • Improves adhesion and durability in protective coatings for metals and other surfaces.
  • Functional Coatings:
    • Creates surfaces with improved hydrophilicity, biocompatibility, or reactivity.

  4. Composites

  • Fiber-Reinforced Composites:
    • Enhances the bonding of resin matrices to glass or carbon fibers, improving mechanical strength and durability.

  5. Biomedical Applications

  • Biomaterials:
    • Used to functionalize surfaces for cell adhesion, protein immobilization, or drug delivery systems.
  • Diagnostics:
    • Functionalizes sensors and diagnostic devices for improved sensitivity and selectivity.

  6. Sol-Gel Chemistry

  • Acts as a precursor or modifier in sol-gel processes for the synthesis of silica-based materials or thin films.

  7. Electronics

  • Functionalizes surfaces in electronic components to improve adhesion and dielectric properties.