The process oil, toluene and water were selected as sonication media in this investigation. The prepared GRs were suspended in media and then exposed to sonication using a probe ultrasonic device (BANDELIN SONOPULS HD3100, HF power of maximum 100 W, microtip MS 73, Italy). The sonication power changed ranging from 30 W to 60 W and sonication time altered between 10 and 30 min. A control sample was prepared by mechanical devulcanization via two roll milling of the GR sample for 20 min (i.e. DGR-Ctrl). To understand the swelling effect on devulcanization yield, GRs were also pre-immersed in oil, toluene and water for 0, 24 and 48 h.
Microtip ms 73
Manufactured by Bandelin
Sourced in Italy, Germany
The Microtip MS 73 is a laboratory equipment designed for sample preparation. It is a reusable, stainless steel microtip that can be used with various ultrasonic devices.
Automatically generated - may contain errors
Lab products found in correlation
2 protocols using microtip ms 73
1
Ultrasonic Devulcanization of Rubber
2
Biopolymer Emulsions with Gentamicin Sulfate
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Based on our previously reported studies (Rodríguez-Contreras, Canal, et al. 2013; Rodríguez-Contreras et al. 2016; Rodríguez-Contreras et al. 2017) , we used the following methodology for the preparation of biopolymers emulsions containing gentamicin sulfate. A Bandelin Sonopuls ultrasonic homogenizer with a micro-tip MS 73 (Bandelin, Germany) was used at 5 W for 3 min to sonicate a concentrated biopolymer solution (40 mg/mL) in chloroform (organic phase), with an aqueous solution of Genta with 2% PVA as an emulsifier. Different Genta concentrations 10% and 30% (w/ w) of the polymer mass were used to form the simple W/O emulsion. In regards to the porous Ta samples, the emulsion used for their coating was prepared with a 10% diluted PHBV solution.
The viscosity of the emulsions was determined for their characterization. A rotational viscometer Haake Mars (Thermo Fisher Scientific, Massachusetts, USA) was used at 25 ºC and with a fixed rotation speed of 0,6 mm/min to determine the viscosity of the biopolymer emulsions.
The viscosity of the emulsions was determined for their characterization. A rotational viscometer Haake Mars (Thermo Fisher Scientific, Massachusetts, USA) was used at 25 ºC and with a fixed rotation speed of 0,6 mm/min to determine the viscosity of the biopolymer emulsions.
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