Poly(amine) modified kaolinite clay for VOC capture

Swasy, Maria I.; Campbell, McKenzie L.; Brummel, Beau R.; Guerra, Fernanda D.; Attia, Mohamed F.; Smith, Gary D.; Alexis, Frank; Whitehead, Daniel C.

doi:10.1016/j.chemosphere.2018.08.156

Cited by 27 publications

(16 citation statements)

References 27 publications

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“…These data clearly indicate the excellent performance of PEI-f-CNC cartridges for the removal of malodorous VFA constituents form rendering plant air. We hypothesize that the capture of VFAs with PEI- f -CNC is facilitated by the rapid formation of ammonium carboxylate salts upon reaction of the VFA with surface-bound amine groups on the nanoparticles [ 19 , 23 ].…”

Section: Resultsmentioning

confidence: 99%

“…Our laboratory has had a long-standing interest in exploring functional nano- and micro-scale materials for environmental remediation [ 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. Recently, we developed a route to access poly(ethylenimine)-modified cellulose nanocrystals (PEI- f -CNC) that are capable of capturing volatile organic compounds associated with odors [ 22 ] and degrading common pesticides from water [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

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Scaled Synthesis of Polyamine-Modified Cellulose Nanocrystals from Bulk Cotton and Their Use for Capturing Volatile Organic Compounds

et al. 2021

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We have previously demonstrated that cellulose nanocrystals modified with poly(ethylenimine) (PEI-f-CNC) are capable of capturing volatile organic compounds (VOCs) associated with malodors. In this manuscript, we describe our efforts to develop a scalable synthesis of these materials from bulk cotton. This work culminated in a reliable protocol for the synthesis of unmodified cellulose nanocrystals (CNCs) from bulk cotton on a 0.5 kg scale. Additionally, we developed a protocol for the modification of the CNCs by means of sequential 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) oxidation and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC) coupling to modify their surface with poly(ethylenimine) on a 100 g scale. Subsequently, we evaluated the performance of the PEI-f-CNC materials that were prepared in a series of VOC capture experiments. First, we demonstrated their efficacy in capturing volatile fatty acids emitted at a rendering plant when formulated as packed-bed filter cartridges. Secondly, we evaluated the potential to use aqueous PEI-f-CNC suspensions as a spray-based delivery method for VOC remediation. In both cases, the PEI-f-CNC formulations reduced detectable malodor VOCs by greater than 90%. The facile scaled synthesis of these materials and their excellent performance at VOC remediation suggest that they may emerge as a useful strategy for the remediation of VOCs associated with odor.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Scaled Synthesis of Polyamine-Modified Cellulose Nanocrystals from Bulk Cotton and Their Use for Capturing Volatile Organic Compounds

et al. 2021

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“…Unsaturated aldehydes are MOVOC components of household odors that are derived from the oxidation of skin oils or from oxidation of lipids during cooking [16,85,86]. Amine-functional polymers are known to bind with and capture aldehydes (including formaldehyde) through the formation of imine bonds [87,88], and have been used in air freshening products to bind with odors (patent US 9273427).…”

Section: Contemporary Approaches and Benefits Of Mitigating Malodorsmentioning

confidence: 99%

The Impact of Indoor Malodor: Historical Perspective, Modern Challenges, Negative Effects, and Approaches for Mitigation

2020

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Malodors, odors perceived to be unpleasant or offensive, may elicit negative symptoms via the olfactory system’s connections to cognitive and behavioral systems at levels below the known thresholds for direct adverse events. Publications on harm caused by indoor malodor are fragmented across disciplines and have not been comprehensively summarized to date. This review examines the potential negative effects of indoor malodor on human behavior, performance and health, including individual factors that may govern such responses and identifies gaps in existing research. Reported findings show that indoor malodor may have negative psychological, physical, social, and economic effects. However, further research is needed to understand whether the adverse effects are elicited via an individual’s experience or expectations or through a direct effect on human physiology and well-being. Conversely, mitigating indoor malodor has been reported to have benefits on performance and subjective responses in workers. Eliminating the source of malodor is often not achievable, particularly in low-income communities. Therefore, affordable approaches to mitigate indoor malodor such as air fresheners may hold promise. However, further investigations are needed into the effectiveness of such measures on improving health outcomes such as cognition, mood, and stress levels and their overall impact on indoor air quality.

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“…PEI) functionalized nanoparticles, microparticles, cellulose nanocrystals, and kaolinite clay materials for VOC remediation. [43][44][45][46] We have also explored the use of PEI-modied cellulose microcrystals for the removal of poly-and peruorinated surfactants from water. 47 In this study, we evaluated the use of a series of amine-functionalized cellulose nanocrystals (CNCs) to serve as a new material for the remediation of pesticide residues from water or organic solvent.…”

Section: Introductionmentioning

confidence: 99%