Facile Route for Bio-Phenol Siloxane Synthesis via Heterogeneous Catalytic Method and its Autonomic Antibacterial Property

Abstract

Eugenol, used as bio-phenol, was designed to replace the hydrogen atom of hydrogenterminated siloxane by hydrosilylation reaction under the presence of alumina-supported platinum catalyst (Pt-Al2O3), silica-supported platinum catalyst (Pt-SiO2) and carbon nanotube-supported platinum catalyst (Pt-CNT), respectively. The catalytic activities of these three platinum catalysts were measured by nuclear magnetic resonance hydrogen spectrometer (1H NMR). The properties of bio-phenol siloxane were characterized by Fourier transform infrared spectrometer (FT–IR), UV-visible spectrophotometer (UV) and thermogravimeter (TGA), and its antibacterial property against Escherichia coli was also studied. The results showed that the catalytic activity of the catalyst Pt-CNT was preferable. When the catalyst concentration was 100 ppm, the reaction temperature was 80 °C and reaction time was 6 h, the reactant conversion rate reached 97%. After modification with bio-phenol, the thermal stability of the obtained bio-phenol siloxane was improved. For bio-phenol siloxane, when the ratio of weight loss reached 98%, the pyrolysis temperature was raised to 663 °C which was 60 °C higher than hydrogenterminated siloxane. Meanwhile, its autonomic antibacterial property against Escherichia coli was improved significantly.

Improving Oxygen Permeability and Thermostability of Polycarbonate via Copolymerization Modification with Bio-Phenol Polysiloxane

“…Eugenol of 98% purity was purchased from Guangdong Tongcai New Material Corporation (Guangzhou, China). Carbon nanotube supported platinum catalyst (Pt-CNT) with 3% Pt was prepared in Zhongkai University of Agriculture and Engineering (Guangzhou, China) [6]. Diphenyl carbonate of 99% purity was obtained from Guangdong Wengjiang Reagent Corporation (Shaoguan, China).…”

“…Eugenol has been used in compound modification for its antibacterial activity, thermal stability, and chemical reactivity [1,2,3,4,5]. With the reactive phenol hydroxyl, bio-phenol polysiloxane has been synthesized via facile heterogeneous catalytic route between eugenol and hydrogen terminated polysiloxane [6,7,8]. As a new kind of functionalized polysiloxane, bio-phenol polysiloxane, which has chemical reactivity and antibacterial activity, has been used in the polymer modification [9].…”

A Simple Preparation Route for Bio-Phenol MQ Silicone Resin via the Hydrosilylation Method and its Autonomic Antibacterial Property

“…Eugenol (4-allyl-2-methoxyphenol) is a bio-phenol that derives from plants; it is one of the main constituents of plant essential oils, such as camphor oil, clove oil, cinnamon leaf oil, and nutmeg oil [12]. Its molecular structure is characterized by phenol hydroxyl, a carbon methoxy group, and an allyl group.…”

“…Furthermore, it is reported that eugenol has anticancer and antioxidant properties [18,19]. Moreover, research shows that the phenolic hydroxyl group plays a pivotal role in antimicrobial activity, and methoxy on the ortho carbon could also enhance the antibacterial activity [12,20].…”

Eugenol Polysiloxane-Polycarbonate/Graphene Nanocomposite: Enhanced in Thermostability and Barrier Property

“…With a soft Si-O-Si main chain, polysiloxane exhibits high and low temperature resistance, weather resistance, hydrophobicity and low-viscosity, and is usually used to modify plastic and rubber [4,5]. Eugenol polysiloxane, a new type of polysiloxane with two phenolic hydroxyl terminal groups, was synthesized via reaction between eugenol and hydrogenterminated polysiloxane, as our previous research reported [6]. Eugenol is a common bio-phenol in the chemical synthesis, and eugenol polysiloxane was used in the polymer modification for its chemical reactivity, antibacterial property and benzene ring which could improve the rigidity of polymer [7][8][9][10][11].…”