Dodecyltriethoxysilane | CAS No. 18536-91-9

Dodecyltriethoxysilane (DTES) CAS 18536-91-9 is an organosilane compound with the chemical formula C18H40O3Si. It has a long alkyl chain (dodecyl) attached to a silicon atom, which is bonded to three ethoxy groups. DTES belongs to a class of molecules called coupling agents, which are used to link different materials together by forming covalent bonds.

One of the main applications of DTES is surface modification, which is the process of changing the properties of a material’s surface by coating it with another substance. DTES can be used to modify the surface of various substrates, such as metals, ceramics, glass, polymers, and minerals. By doing so, DTES can improve the adhesion, hydrophobicity, corrosion resistance, and biocompatibility of the substrates.

How does DTES work as a coupling agent? The mechanism involves two steps: hydrolysis and condensation. First, DTES reacts with water to form silanol groups (Si-OH) and ethanol. This is called hydrolysis. Second, the silanol groups react with each other or with other silanol groups on the substrate surface to form siloxane bonds (Si-O-Si). This is called condensation. The result is a thin layer of alkylsiloxane that covers the substrate surface.

The advantage of using DTES as a coupling agent is that it can form stable and durable coatings that are resistant to water, heat, and chemicals. Moreover, DTES can impart hydrophobicity to the substrate surface, which means that it repels water and reduces its wetting ability. This can be useful for applications that require water-repellent or self-cleaning surfaces, such as textiles, paints, coatings, and biomedical devices.

DTES can also be used in combination with other organosilanes or nanoparticles to create multifunctional coatings with enhanced properties. For example, DTES can be mixed with tetraethoxysilane (TEOS) to form anti-corrosive coatings on mild steel. DTES can also be blended with silica nanoparticles to modify the wettability of oil-wet carbonate substrates or calcite crystals.

DTES is a versatile coupling agent that can be used for surface modification of various substrates. It can form stable and hydrophobic alkylsiloxane coatings that improve the adhesion, corrosion resistance, and biocompatibility of the substrates. DTES can also be combined with other organosilanes or nanoparticles to create multifunctional coatings with enhanced properties.

Product codePR-213E
English name:Dodecyltriethoxysilane
LS 6570;
NSC 139837;

Silane, dodecyltriethoxy

Molecular Structure:
Molecular formula:18 H 40 O 3 Si
Molecular weight:332.5939
CAS Registry Number:18536-91-9
EINECS accession number:242-409-9