Polydimethylsiloxane Sponges Incorporated with Mesoporous Silica Nanoparticles (PDMS/H-MSNs) and Their Selective Solvent Absorptions,Industrial & Engineering Chemistry Research

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Polydimethylsiloxane Sponges Incorporated with Mesoporous Silica Nanoparticles (PDMS/H-MSNs) and Their Selective Solvent Absorptions
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-08-19 , DOI: 10.1021/acs.iecr.9b02946
Tidapa Rattanaumpa ₁ , Wittawinwit Naowanon ₂ , Sujitra Amnuaypanich ₂ , Sittipong Amnuaypanich _{1,

2}

Affiliation

Polydimethylsiloxane (PDMS) sponges incorporated with hydrophobic mesoporous silica nanoparticles (PDMS/H-MSNs) were fabricated by a sugar templating method. Hydrophobicity of H-MSNs was achieved by heat treatment under an inert atmosphere. PDMS/H-MSNs had a progressively increased water contact angle with loading amounts of H-MSNs. The mechanical properties were improved upon incorporation of H-MSNs in PDMS sponges. Also, PDMS/H-MSNs sponges were resilient as indicated by a complete recovery to its original shape after 50 cycles of compression strain at 50%. PDMS/H-MSNs sponges were capable of selectively absorbing diesel oil and various organic solvents. The sponges had the ability to completely remove solvents either floating on a water surface or under water. PDMS/H-MSNs increasingly absorbed chloroform with increasing amounts of H-MSNs with its absorption capacity as high as 2000%. The reusability was tested with PDMS/20H-MSNs sponges by repeated adsorption–desorption of dichloromethane. The sponge can maintain its absorption capacities after 20 adsorption–desorption cycles.

中文翻译：

掺有介孔二氧化硅纳米粒子（PDMS / H-MSNs）的聚二甲基硅氧烷海绵及其选择性溶剂吸收

通过糖模板法制备了与疏水性介孔二氧化硅纳米粒子（PDMS / H-MSNs）结合的聚二甲基硅氧烷（PDMS）海绵。H-MSNs的疏水性是通过在惰性气氛下进行热处理来实现的。PDMS / H-MSNs的水接触角随着H-MSNs的加载量而逐渐增加。在PDMS海绵中掺入H-MSN后，机械性能得到改善。同样，PDMS / H-MSNs海绵具有弹性，如在50％的压缩应变50次循环后完全恢复其原始形状所显示。PDMS / H-MSNs海绵能够选择性吸收柴油和各种有机溶剂。海绵具有完全去除浮在水面上或水下的溶剂的能力。PDMS / H-MSNs吸收的氯仿随着H-MSNs含量的增加而增加，其吸收能力高达2000％。使用PDMS / 20H-MSNs海绵通过重复吸附和脱附二氯甲烷测试了可重复使用性。海绵在20个吸附-解吸循环后可以保持其吸收能力。

更新日期：2019-08-19

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