γ-aminopropyltriethoxysilane

• CAS: 919-30-2
• Catalog Number: ALC-FP-919302
• Category: Featured Products
• Density: 0.945 ± 0.005 (25ºC, g/ml)
• Appearance: Colorless liquid
• Assay: ≥ 98%
• Refractive Index: 1.4230 ± 0.0050 (n25D)
• Sample Lot No.: HD240515

Case Study

γ-Aminopropyltriethoxysilane for the Silanization of Halloysite Nanotubes

Jia S, et al. Applied Clay Science, 2019, 180, 105204.

Raw and calcined halloysite (300-1200 °C) were silanized using γ-aminopropyltriethoxysilane (APTES) in dry toluene under reflux at 120 °C for 20 h. A CaCl₂ drying tube ensured anhydrous conditions. The resulting powders, Hal-M and Hal-X-M, were washed with dry toluene and vacuum-dried at 90 °C. Structural characterization via XRD, thermal analysis, DRIFT, solid-state NMR (¹H, ²⁹Si), and TEM/HRTEM revealed that halloysite retained its tubular morphology up to 900 °C, while surface hydroxyl distribution varied with calcination temperature. Maximum external Si-OH groups occurred at 700 °C, yielding the highest silane loading (5.87 wt %). This methodology demonstrates optimized surface functionalization of halloysite for advanced material development.

γ-Aminopropyltriethoxysilane for Surface Modification of Cellulose Nanofibrils in Portland Cement

Bai J, et al. Construction and Building Materials, 2025, 486, 141956.

Cellulose nanofibrils (CNF) were surface-modified with γ-aminopropyltriethoxysilane (KH550) via a sol-gel approach. KH550 was added to 0.1 % CNF suspensions at 0.2-1.5 wt % of CNF, hydrolyzed under magnetic stirring for 15 min, and heated at 65 °C for 2 h. Modified CNF (KCNF) was centrifuged and freeze-dried for characterization. Optimal dispersion occurred at 0.8 wt % KH550, enhancing cement composite properties. Stratification behavior over 1 month confirmed colloidal stability. This protocol highlights KH550's utility in improving CNF compatibility with cement matrices, enabling enhanced mechanical and rheological performance.

γ-Aminopropyltriethoxysilane for the Preparation of TA-APTES-MoS₂ Composite in Crumb-Rubber-Modified Asphalt

Tan Q, et al. Construction and Building Materials, 2024, 456, 139191.

γ-Aminopropyltriethoxysilane (APTES) was co-deposited with tannic acid (TA) onto MoS₂ to form a bio-based TA-APTES-MoS₂ coating for incorporation into crumb-rubber-modified asphalt (CRMA). A 0.75 g TA solution in 100 mL THAM buffer (pH 8.0) was combined with 0.8 g MoS₂ and 0.5 mL APTES and stirred at 30 °C for 18 h with oxygenation. The product was filtered, washed, and dried at 60 °C for 24 h. Under alkaline conditions, TA catechol groups oxidized to benzoquinone derivatives, crosslinking to form a mesh structure. APTES amino groups chemically bonded to the mesh, enhancing adhesion. The resultant TA-APTES-MoS₂ composite effectively modified CRMA, demonstrating the experimental application of APTES in bio-based surface functionalization.

γ-Aminopropyltriethoxysilane as Curing Agent in Cellulose Acetate Butyrate-Modified Waterborne Acrylic Coatings

Zheng B, et al. Reactive and Functional Polymers, 2020, 154, 104657.

γ-Aminopropyltriethoxysilane (KH-550) was employed as a curing agent for cellulose acetate butyrate (CAB)-modified waterborne acrylic resin. KH-550 was pre-hydrolyzed with water (1:3 mass ratio) for 30 min to yield a transparent curing solution. The aqueous resin was blended with KH-550 at varying mass ratios (1:0-1:0.45) at room temperature. Coatings were applied onto galvanized sheets using a 60 μm wire rod and cured at 100 °C for 30 min. The experimental method demonstrated that APTES effectively crosslinks CAB-modified acrylic films, enhancing film integrity and coating performance, highlighting its practical application in waterborne resin curing.