Diffusion of low molecular weight siloxane from bulk to surface

Homma, Hiroya; Kuroyagi, T.; Izumi, Kunikazu; Mirley, C. L.; Ronzello, JoAnne; Boggs, S.A.

doi:10.1109/94.775625

Cited by 98 publications

(31 citation statements)

References 13 publications

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“…1) between 808 and 1,266 cm -1 , which were attributed to siloxanes because that region is their main IR absorption region. Assignment of peaks was done as reported in the literature (Brown et al 1988;Günzler and Gremlich 2000;Homma et al 1999;Coates 2000;Hamciuc et al 2007). An increase of peaks intensity was observed at 1,063 and 2,964 cm -1 compared with the raw material.…”

Section: Ft-ir Of Lignocellulosic Materialsmentioning

confidence: 99%

Evaluation of N-terminated siloxanes grafted onto lignocellulose as adsorbent for the removal of phenol red from water

Vala

Tichagwa

Dikio

2014

Int. J. Environ. Sci. Technol.

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This study reports the chemical modification of lignocellulose (from Kikuyu grass) with N-terminated siloxanes and its utilisation as adsorbent for the removal of phenol red from aqueous media. The stability of the bond between lignocellulose and siloxane was assessed after Soxhlet extraction of unreacted siloxanes in tetrahydrofuran for 5 h, as well as soaking the materials in water for 24 h. Adsorption tests showed the prepared materials to be good candidate for the removal of phenol red (dye) from water, with adsorption capacity from 1.454 to 3.312 mg of phenol red adsorbed per gram of adsorbent. The kinetics of adsorption was found to follow a pseudo-second-order equation indicating chemisorption rather than simple forces of association. The linearised form of adsorption isotherms matched with the Langmuir model.

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Section: Ft-ir Of Lignocellulosic Materialsmentioning

confidence: 99%

Evaluation of N-terminated siloxanes grafted onto lignocellulose as adsorbent for the removal of phenol red from water

Vala

Tichagwa

Dikio

2014

Int. J. Environ. Sci. Technol.

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“…The peak at 1271 cm À1 of the PMS-treated fibers resulted from stretching vibrations of the SiACH 3 bonds, 20,22,23 whereas the peak at 768 cm À1 corresponds to the vibrations of a collection of bonds, including SiAO, SiAC, and/or SiAOAC. 22,24 The peak at 1019 cm À1 is typically attributed to stretching of SiAOASi bonds 23,25 developed among the silanols. The sharp peak at 1104 cm À1 is due to asymmetric vibrations of the SiAOAC bonds, 26,27 which emerge when silanols and polysilanols are anchored chemically to cellulosic fibers.…”

Section: Reactions Of Pms With Cellulosic Fibersmentioning

confidence: 99%

Potassium methyl siliconate‐treated pulp fibers and their effects on wood plastic composites: Water sorption and dimensional stability

Piao

Cai

Stark

et al. 2012

J of Applied Polymer Sci

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Potassium methyl siliconate (PMS) was investigated as a new nano modifier of wood fiber and wood flour to improve the compatibility between the fiber/flour and the plastic matrix in fiber reinforced plastic composites. Before injection molding, bleached and brown pulp fibers and mixed species wood flour were pretreated in PMS solutions. The morphology of the treated and untreated fiber and flour, the compatibility of PMS-treated fiber and flour with polyethylene (PE), and the water sorption and volumetric swell of PMS-treated fiber/flour plastic composites in a long-term soaking test were evaluated. Fiber and flour treated with PMS increased the compatibility between the fiber/flour and the PE matrix. The increased compatibility of PMS-treated fiber and flour with the matrix contributed to the reduction of water sorption and, thus, increased dimensional stability. For all composites, water sorption and volumetric swell of fiber/four plastic composites decreased as the ratio of fiber to flour increased.

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“…The reason for this improved performance is the hydrophobic surface behavior and especially the SIR capability to transfer the hydrophobic behavior the accumulated contamination. The progressive accumulation that occurs (an average period of 18 days for a critical amount to be formed) and the time gap that exists between deposition and wetting permits the recovery of hydrophobicity on the coating surface, as a result of the low molecular weight (LMW) molecules migration [13][14][15][23][24][25][26]. Thus leakage current activity is suppressed.…”

Section: Evaluation Of the Coated Insulators Performancementioning

confidence: 99%