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ArticleDate
2011-08-19Online Publication Date
2011-08-19Print Publication Date
2011-09-28Permanent link to this record
http://hdl.handle.net/10754/598352
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We present here the creation of a defect-free polyvinylidene chloride barrier layer on the lumen-side of a hollow fiber sorbent. Hollow fiber sorbents have previously been shown to be promising materials for enabling low-cost CO 2 capture, provided a defect-free lumen-side barrier layer can be created. Film experiments examined the effect of drying rate, latex age, substrate porosity (porous vs nonporous), and substrate hydrophobicity/ hydrophilicity. Film studies show that in ideal conditions (i.e., slow drying, fresh latex, and smooth nonporous substrate), a defect-free film can be formed, whereas the other permutations of the variables investigated led to defective films. These results were extended to hollow fiber sorbents, and despite using fresh latex and relatively slow drying conditions, a defective lumen-side layer resulted. XRD and DSC indicate that polyvinylidene chloride latex develops crystallinity over time, thereby inhibiting proper film formation as confirmed by SEM and gas permeation. This and other key additional challenges associated with the porous hollow fiber substrate vs the nonporous flat substrate were overcome. By employing a toluene-vapor saturated drying gas (a swelling solvent for polyvinylidene chloride) a defect-free lumen-side barrier layer was created, as investigated by gas and water vapor permeation. © 2011 American Chemical Society.Citation
Lively RP, Mysona JA, Chance RR, Koros WJ (2011) Formation of Defect-Free Latex Films on Porous Fiber Supports. ACS Applied Materials & Interfaces 3: 3568–3582. Available: http://dx.doi.org/10.1021/am200789g.Sponsors
The authors thank ExxonMobil Corporation for funding this research. W.J.K. thanks King Abdullah University for Science and Technology (KAUST) for funding his time.Publisher
American Chemical Society (ACS)PubMed ID
21812472ae974a485f413a2113503eed53cd6c53
10.1021/am200789g
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