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• W4207036735 endingPage "128387" @default.
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• W4207036735 abstract "There is increased pressure on microcapsule manufacturers to develop microcapsules following green chemistry principles and using safe biobased materials. Diphenolic acid, prepared from cellulose-derived levulinic acid and phenol, was used as a replacement for bisphenol-A. The resulting diepoxy resin diglycidyl ether diphenolate methyl ester (DGEDP-methyl ester) was incorporated in the fragrance oil and reacts with hexamethylenediamine (HMDA) to build capsule walls by interfacial polymerization. The biobased emulsifier gum arabic at 2.5 wt% was found to provide good capsule formation. The effect of DGEDP-methyl ester/HMDA ratios on various capsule properties was studied. A low HMDA concentration at 0.75 wt% yields deformed capsules with lower microencapsulation efficiency (EE< 90%) and lower stability (oil leaking > 26.3% after acid treatment, and > 87.2% after sonication). A medium HMDA concentration (1 wt%) with 2–4 wt% DGEDP-methyl ester generates spherical capsules with higher EE (91.2–96.5%) and improved stability (oil leaking was < 20.3% after acid treatment, and < 76% after sonication). Increasing the content of HMDA to 1.25 wt% along with ≥ 2 wt% DGEDP-methyl ester led to extensive aggregation with a slight increase in EE at the expense of capsule stability. These observations demonstrate that DGEDP-methyl ester/HMDA interfacial polymerization is a promising biobased alternative for isocyanate and formaldehyde approaches for oil encapsulation." @default.
• W4207036735 created "2022-01-26" @default.
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• W4207036735 date "2022-05-01" @default.
• W4207036735 modified "2023-10-16" @default.
• W4207036735 title "Bio-based alternative for encapsulating fragrance oils in epoxy resin microcapsules" @default.
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• W4207036735 doi "https://doi.org/10.1016/j.colsurfa.2022.128387" @default.
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