Methyltrimethoxysilane

Catalog NumberHG1185553

CAS Number1185-55-3

CategorySilicone Surfactants

Synonyms

Silane, methyltrimethoxy-;Silane, trimethoxymethyl-;Trimethoxy(methyl)silane

Molecular Weight

136.22

Molecular Formula

C4H12O3Si

Appearance

Liquid

Application

Use as couplingagent.; Use as film-formingagent.; Use as surface modifying agent.

Active Content

95%

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Case Study

Methyltrimethoxysilane as a Hydrophobic Agent for Silica Thin Layer Fabrication

Darmawan, Adi, et al. IOP Conference Series: Materials Science and Engineering. 299. 1. IOP Publishing, 2018.

Methyltrimethoxysilane (MTMS) functions as a hydrophobic precursor for fabricating silica thin layers with tunable wettability.
Experimental Protocol: MTMS is hydrolyzed in an ethanol-water mixture (molar ratio 1:4) under acidic conditions at pH 3-4 at 25°C for 2 h. The sol is deposited onto silicon substrates by spin-coating at 3000 rpm for 30 s. The coated substrates are calcined at 350°C for 2 h to form the silica thin layer. The pH of the precursor solution is adjusted from 2 to 12 to study its effect on surface properties.
Performance Evaluation: The silica thin layer exhibits a water contact angle up to 94.7^o when prepared at pH 8.12, indicating hydrophobic surface characteristics. The Si-C peak at 865-750 cm^-1 in FTIR spectra confirms the retention of methyl groups after calcination at 350°C. The hydrophobicity is attributed to the surface methyl groups from MTMS that resist thermal decomposition. This MTMS-based approach provides a simple method for preparing hydrophobic silica coatings.

Methyltrimethoxysilane as a Multipurpose Additive for Superhydrophobic Cotton Fabric

Ou, Junfei, et al. Progress in Organic Coatings 146 (2020): 105700.

Methyltrimethoxysilane (MTMS) serves as a multipurpose chemical additive for fabricating durable superhydrophobic cotton fabric.
Experimental Protocol: Cleaned cotton fabric is immersed in a solution containing HDTMS (100 L), MTMS (150 L), H₂O (20 mL), and C₂H₅OH (10 mL) for 1.5 h. The fabric is dried at 110°C for 30 min and ultrasonically cleaned in ethanol for 10 min. The laundering durability is assessed by AATCC Test Method 61-2007, and abrasion resistance is tested by ISO105-X12:2001 at 44.8 kPa.
Performance Evaluation: The treated fabric exhibits a maximum water contact angle of 162.5 2.4^o and a minimum sliding angle of 12.5 2.7^o. MTMS reduces the optimal treatment time from 4 h (HDTMS alone) to 1.5 h. The fabric retains superhydrophobicity after 70 accelerated laundering cycles and 1700 abrasion cycles, demonstrating excellent durability. The gained weight is 2.6 0.05%, confirming a thicker coating layer.

Methyltrimethoxysilane as a Precursor for Elastic Silica Aerogels with High Thermal Insulation

Wang, Lukai, et al. RSC advances 9.19 (2019): 10948-10957.

Methyltrimethoxysilane (MTMS) acts as a silica precursor for preparing elastic, hydrophobic aerogels reinforced with polyvinylmethyldimethoxysilane (PVMDMS).
Experimental Protocol: MTMS and PVMDMS are mixed in benzyl alcohol with a Si molar ratio of PVMDMS/(PVMDMS + MTMS) from 20 to 90 mol%. Tetramethylammonium hydroxide (TMAOH)/Si at 0.075 mol/mol and H₂O/Si at 3 mol/mol are added. The sol is gelled at 50°C for 2 h, aged at 100°C for 4 d, and dried using CO₂ supercritical drying at 55°C and 15 MPa.
Performance Evaluation: The optimized aerogel (PRMSA-50) exhibits a water contact angle of 136.9^o, a compressive strength of 0.19-1.98 MPa with elastic recovery, and a high BET surface area of 1039 m²/g. The thermal conductivity reaches as low as 0.0228 W m^-1 K^-1 under ambient conditions, demonstrating excellent thermal insulation performance.

• Synonyms: Silane, methyltrimethoxy-;Silane, trimethoxymethyl-;Trimethoxy(methyl)silane
• Molecular Weight: 136.22
• Molecular Formula: C4H12O3Si
• Appearance: Liquid
• Application: Use as couplingagent.; Use as film-formingagent.; Use as surface modifying agent.
• Active Content: 95%