In this article, graphene oxide (GO) is modified using Phosphorous acid via the strong –P = O in the study reported in the paper. And the chemical structure was characterized by Fourier Transform infrared spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X‐ray diffraction. And polypropylene (PP) composites are prepared by melt compounding method, and functionalized graphene oxide (FGO) is in situ thermally reduced during the processing. The thermal stability, mechanical and flame properties, and morphology for the char layer of composite materials were separately investigated using TG (Thermogravimetric analysis), tensile and charpy impact tests and SEM (scanning electron microscope). The results of SEM and TEM indicate that FGO nanosheets are homogeneously dispersed in polymer matrix with intercalation and exfoliation microstructure. The FGO/PP nanocomposite exhibits higher thermal stability and flame retardant property than those of the GO counterpart and pure PP. During the thermal decomposition, The –P = O introduced to improve the flame effect and the yield of the carbon residue was increase. The heat release rate and the escape of volatile degradation products are reduced in the FGO‐based nanocomposites. POLYM. COMPOS., 40:723–729, 2019. © 2018 Society of Plastics Engineers

A novel polymer, by molecularly imprinting glutathione (GSH), capable of being directly utilized in the aqueous phase, was developed for uptaking GSH. To significantly improve cross-linking density of this molecular imprinted polymer (MIP), the pseudoternary phase diagram of N,N′-methylene-biacrylamide, methanol, and water was investigated to increase solubility of NMBA. Subsequently, key fabrication variables, including a functional monomer, cross-linker, and initiator quantity, polymerization temperature, and time were optimized. Under optimum conditions, the maximum adsorption capacity of GSH approached 27 mg g −1 , and the separation degree was as high as 2.84. The Fourier transform infrared spectrometer (FTIR), scanning electron microscope (SEM), and Brunauer−Emmett−Teller (BET) analysis results from GSH-MIP and the control indicated that the high adsorption capacity and selectivity of GSH originated from the arrangement of functional groups and cavities. Additionally, this MIP demonstrated appealing long-time stability and reusability. The adsorption kinetics could be well described by a pseudo-first-order model, while the thermodynamics of the adsorption process could be described by neither classic Langmuir nor Freundlich model. The adsorption and separation study was applied in urine, and the adsorption rate was 90.30%, the desorption rate was 75.32%, and the purity was 58.74%.

Purpose -The purpose of this paper is to prepare a higher chloromethylation degree (CD) modified macroporous adsorption resin (MAR, LX1180-Cl) and further study their adsorption performance. Design/methodology/approach -CD and crosslinking degree were evaluated using stationary potential step and rotating-disk method, the adsorption performance of LX1180-Cl and LX1180 for flavonoids were studied using the UV-VIS spectrophotometry.Findings -This research realized high CD (9.6 mass %) on high crosslinking MAR, LX1180. In tandem, the adsorption performance of them to flavonoids finds that the matching degree of polarity (presented with CD) and size were the critical factor to adsorption. It was also found that the reaction time had reduced to 24 h with the addition of iron particles into the zinc chloride (ZnCl 2 ) catalyst.Research limitations/implications -The study on reaction mechanism and the function principle of hybrid catalyst were speculated, but not the rigid experimental result. Practical implications -This contribution can provide a rule for the separation and purification of natural products with the aim to improve food additive removal or isolation and purification of flavonoids used for healthcare applications. Originality/value -This contribution provided a novel way to obtain high degree of CD with high crosslinking MAR, CD of commercially available MAR was improved by 2.5 times to 9.6 percent under crosslinking degree at 58.2 percent, compared with reported CD value (ca. 4.2 percent under crosslinking degree at 20.0 percent), which will be useful in the following further systematically research about the adsorption and separation selectivity of MAR. Besides, the primitive chosen principle of MAR according to the substrate was also presented. Moreover, the chloromethylation mechanism, although speculative, was briefly presented, which will stimulate the related study.

Molecular imprinted polymers of solanesol (SSO-MIPs) were synthesized through solution polymerization using solanesol (SSO) as the template molecule, N-vinylpyrrolidone (NVP) and acrylic acid (AA) as functional monomers, ethyleneglycol dimethacrylate (EGDMA) as cross-linker and azodiisobutyronitrile (AIBN) as initiator. Focused on the adsorption capacity and separation degree of MIP-SSO to SSO from the mixture of SSO and Triacontanol (TAL), the effects of the monomers, cross-linker and initiators on them were investigated and optimized. Finally, the structure of MIP-SSO prepared under the optimal conditions was characterized using Fourier transform infrared and scanning electron microscope. To obtain the more objective results, non-imprinted molecular polymers (NMIPs) prepared under the same condition was also characterized as contrast.