Preparation of highly flexible cellulose acetate membranes modified by hyperbranched poly(amine ester)-epoxidized soybean oil and evaluation of its filtration properties

Effect of a Natural Processing Aid on the Properties of Acrylonitrile-Butadiene Rubber: Study on Soybean Oil Fatty Acid from Seed Crop

“…To confirm that the SBOFA was successfully obtained, the chemical structure of the SBOFA was investigated using ATR-FTIR analysis in comparison with that of the SBO ( Figure 1 ). The typical functional groups of the SBO and SBOFA appeared at 3008, 2926, 2854, 1743, 1464, 1160, and 722 cm −1 and were identified as the –C=CH stretching, C–H of CH 3 stretching, C–H of CH 2 stretching, –C=O stretching of ester, C–H of CH 2 , –CH in plane, and –HC=CH– bending (out of plane) [ 25 , 26 ], respectively, as summarized in Table 3 .…”

“…From Figure 1 , the appearance of peaks at 1710 and 3300–3500 cm −1 attributed to the C=O stretching and O–H of the carboxylic acid, respectively, indicated the formation of free fatty acids (FFAs) [ 25 , 26 , 27 ]. Moreover, the absorption peak at 1743 cm −1 of the C=O of triacylglycerols in the SBO was shifted to 1740 cm −1 attributed to the carboxylate group of the fatty acid metallic salt (or Na soaps) [ 27 ].…”

“…The ATR-FTIR spectra of NBR vulcanizates with varying SBOFA loadings is shown in Figure 6 . All the NBR vulcanizates with SBOFA showed an absorption peak at 1740 cm −1 (C=O stretching of the sodium salt fatty acids) [ 25 , 31 ], which was absent in the NBR vulcanizate without SBOFA. Hence, this peak indicated the presence the SBOFA.…”

Recycled-Oil-Based Polyurethane Modified with Organic Silicone for Controllable Release of Coated Fertilizer

“…In the FTIR spectrum of RO, the characteristic peaks at 3010 cm −1 and 1760 cm −1 were attributed to the C=C–H and C=O stretching vibrations, respectively. In the spectrum of ERO, the new peaks at 910 cm −1 (Figure 2a ERO at high resolution) and 3460 cm −1 were assigned to the stretching vibration of epoxy groups and hydroxyl group [26], respectively. At the same time, the peak at 3010 cm −1 was weakened, demonstrating that C=C–H bonds were partially oxidized to form epoxy groups.…”

“…The recovered oil was premodified according to the procedures reported by the literature [26,27,28] with slightly modification. Typically, 150 g of recovered oil was added to a 3L-four-necked reaction kettle equipped with a mechanical stirrer, thermometer, and water condenser.…”