Preparation and morphology control of three‐dimensional interconnected microporous PDMS for oil sorption

Abstract

This study described an approach to impart controlled morphology and improved pore interconnectivity to poly(dimethylsiloxane) (PDMS) sponges for oil sorption by partially fusing the sugar particles together prior to creation of a continuous PDMS matrix. PDMS sponges with high absorption capacity, low water pickup, and remarkable reusability were fabricated by the polymerization of the PDMS prepolymer and a curing agent in cyclohexane. The PDMS sponge showed oil absorbency in the range from 790% to 4000% for various oils solvents, with the maximum absorption capacity reaching up to 23 times of its weight. Compressive modulus of PDMS subjected to sugar fusion for 24 hr was significantly increased to 1900 Mpa. The sponge also exhibited excellent repellency to corrosive strong acid and alkali. Besides, oil can be quickly adsorbed in tens of seconds and maintained for several months. Furthermore, PDMS sponges showed little loss of their absorption capacities and owned weights after 20 absorbing/recovering cycles. Copyright © 2015 John Wiley & Sons, Ltd.

A Flexible and Highly Sensitive Pressure Sensor Based on a PDMS Foam Coated with Graphene Nanoplatelets

“…Commonly, commercially available sugar lumps or sugar/salt particles are used to form sacrificial well-connected templates [15,16,17,18,19]. In the present work templates are obtained by compacting dark brown sugar particles having an average size of 270 μm (see Section 3.2).…”

Offenzellige Schwämme mit niedrigen Dichten als Funktionsmaterialien

“…Graphen, Graphen/PS, Graphen/PU/Fe 3 O 4 , CNT/Graphen, CNT, CNT/Bor, CNF, Kohlenstoff, Melamin,, modifiziertes Melamin,, Melamin/Lignin, modifiziertes PU, PU/Fe 3 O 4 /SiO 2 /Fluorpolymer, Polysiloxan, PDMS, Silicon/Fe 3 O 4 /SiO 2 , Cellulose, Cellulose/Fe 3 O 4 , Chitin, Lignin, Gelatine, elektrogesponnene Fasern, P(St‐DVB), PP…”

Thermo-Physical Characterization of Carbon Nanotube Composite Foam for Oil Recovery Applications

“…The sponge could be elastically deformed in any shape and compressed more times without structural collapse. Si et al [11] controlled PDMS sponges' morphology and enhanced their pore interconnectivity for oil sorption by partially melding sugar particles (400-1600 µm) before creating a continuous PDMS-based matrix. In order to obtain a material with reliable sorption performances, an optimal pore size distribution coupled to an improved chemical inertness, high mechanical strength, and effective water to oil selectivity is required.…”