Optimization of microfibrillated cellulose isolation from cocoa pod husk via mild oxalic acid hydrolysis: A response surface methodology approach

TEOS Silane Film Modified with SBA-15 Loaded with Cocoa Husk Extract as Pretreatment of ASTM 1008 Steel

“…Furthermore, in the band regions at 1245 cm -1 and 1061 cm-1 there are asymmetric stretching vibrations of the C-O-C ether bonds, and at 1061 cm -1 symmetric stretching vibrations of the C-O-C ether bonds 11,40 . These bonds can contribute to the intensity of the bands in the EXSBA sample and are characteristics of molecules with inhibitory potential such as tannins, caffeine, theobromine, fatty acids, cellulose, hemicellulose, and lignin which are already widely reported in the literature to be present in the cocoa husk 11,[42][43][44] .…”

“…For EXSBA (Figure 5B), this same thermal event leads to a mass loss of 6.8%. Zambrano-Mite et al 44 evaluated the thermal decomposition behavior of organic compounds from cocoa husk and associated this first stage of mass loss also with low molecular weight organic compounds. Therefore, the present work can also associate the mass loss in this first stage with the volatilization of these low molecular weight organic compounds that may be incorporated into EXSBA due to the loading with cocoa husk extract.…”

“…EXSBA has another thermal event by DTG (Figure 5B), the second event occurs in the temperature range of 150 °C to 550 °C, with a mass loss of 7.4% which can be attributed to the degradation of high molecular weight organic components with possible inhibitory properties impregnated in the mesopores and micropores of EXSBA, such as: hemicellulose, cellulose, lignin, fatty acids and tannins 42,44 . Finally, an inorganic thermal behavior of mass loss is observed 44,45 . Thus, the total mass loss of EXSBA was about 14.2%, indicating that at least about 7.4% can be attributed to the presence of organic compounds within the pores of EXSBA.…”