Abstract In this study, a new extraction approach for liquid samples – stir cake sorptive using monoliths as extractive medium was developed. The preparation procedure of is very simple. First, monolithic synthesized according to the in situ polymerization monolith; then, inserted an original unit (holder), which constructed from syringe cartridge and allows magnetic stirring during process. effects dimension design on performance were optimized detail. To demonstrate usability approach,...

Conversion of natural gas hydrates into CO2 is well-known as an innovative and eco-friendly method both future energy production greenhouse control. To increase the total CH4 rate by using such a method, experiments were carried out replacing with mixtures containing N2 from naturally occurring at 273.9 K pressure ranging 2.50 to 6.67 MPa. Raman spectroscopic analysis was performed examine structure distributions in hydrate phase. Results showed no structural transition found prefer large...

Isotactic polypropylene (iPP) is a commonly used thermoplastic polymer with many excellent properties. But high brittleness, especially at low temperatures, limits the use of iPP. The presence transcrystallization iPP makes it possible for fiber-reinforced composites higher strength. Bacterial cellulose (BC) kind great potential to be as new filler reinforce due its crystallinity, biodegradability and efficient mechanical In this study, iPP/BC hamburger composite was prepared by simple hot...

Swapping CH4 with CO2 in hydrocarbon hydrates is renowned as an eco-friendly method for potential energy production and climate change mitigation. To fully understand the CH4–CO2 replacement process, situ Raman spectroscopy combined long-term macroscopic measurements were carried out by putting into gaseous at temperatures ranging from 273.2 to 281.2 K. A kinetic model based on gas diffusion theory was modified. Results showed that swapping process started surface reaction followed hydrate...

Among numerous nucleating agents, organic carboxylate agents have been demonstrated to markedly improve the crystallization of polypropylene (PP). However, poor dispersion in PP matrix affects modification effect. In this work, erucamide (ECM) and sodium 4-[(4-chlorobenzoyl) amino] benzoate (SCAB) form a hydrogen-bonded self-assembled structure obtain SCAB-ECM composite agent order SCAB exert internal lubrication on matrix. The molecular was investigated by using Fourier transform infrared...

Bacterial cellulose (BC) is a new kind of with great potential in enhancing preparation isotactic Polypropylene (iPP) composites, which have been found excellent performance. However, the interface compatibility between BC and iPP poor. In this study, iPP/BC composites were prepared by solution mixing. Esterification modified (CO) Maleic anhydride grafted polypropylene (MAPP) added as compatibilizer was both used to improve interfacial composites. The rheology isothermal crystallization...

Isotactic polybutene (iPB) has a wide application in the water pipe field. However, most valuable form I, needs 7 days to complete transformation. In this study, attapulgite (ATP), which produces lattice matching of iPB was selected prepare an iPB/ATP composite. The Fischer-Tropsch wax (FTW) grafted with maleic anhydride obtain MAFT, and ATP structure reset by reactions MAFT prepared FATP, improved interface compatibility iPB. Fourier transform infrared spectroscopy (FT-IR) contact angle...

Microcrystalline cellulose (MCC) offers great potential to improve the mechanical and crystallization properties of isotactic polybutene-1 (iPB) because its low cost, biodegradability, renewability excellent properties. However, compatibility polar MCC non-polar iPB is poor. In this study, maleic anhydride grafted polybutene (MAPB) was prepared by solution method used as a compatibilizer in fabrication iPB/MCC composites using twin screw extruder. The ultimate tensile strength, modulus,...

Isotactic polybutylene-1 (iPB) has lots of advantages and is best used as hot water pipe. However, to transform into stable crystal form I, the iPB needs long 7 days. In this process, irreversible damage brings great difficulties use iPB. The method which convert it directly I shortcomings such being requiring complex operation expensive. study, an innovative idea was put forward, not paying attention transformation but only focusing on reducing time can be applied. bamboo powder modified by...

To solve the decrease in crystallization, mechanical and thermal properties of recycled polyethylene terephthalate (rPET) during recycling, aromatic amide fatty acid salt nucleating agents Na-4-ClBeAmBe, Na-4-ClBeAmGl Na-4-ClAcAmBe were synthesized rPET/nucleating agent blend was prepared by melting blending. The molecular structure, stability, microstructure crystal structure characterized detail. differential scanning calorimetry (DSC) result indicated that addition improved...

Zinc stearate (Znst) was physically blended with the sodium 4-[(4 chlorobenzoyl) amino] benzoate (SCAB) to obtain SCAB-Znst composite nucleating agent. Znst used improve dispersion property of SCAB and exert a lubricating effect on PP matrix. The scanning electron microscopy fracture surface morphology PP/SCAB illustrated that addition greatly reduced aggregation phenomenon in result rotary rheometer indicated exhibits internal lubrication PP. DSC crystallization properties were improved....

Isotactic poly (1-butene) (iPB) has excellent properties which are recognized as a green and energy saving product. However, the most stable valuable crystal form I had spontaneous transformation that took long seven days to complete. As special solid waste, herb residue (HR) is rich in cellulose great potential accelerate of iPB. polarity HR results interface compatibility with non-polar In this study, was modified by silane coupling agent (KH570) obtain KHR iPB/HR composite prepared. The...

The attapulgite (ATP) with unique one-dimensional rod-like structure was used to improve the mechanical and crystallization properties of recycled polypropylene (rPP). In order increase compatibility polar ATP non-polar rPP, maleic anhydride (MAH) grafted onto fischer-tropsch wax (FTW) then reacted prepare FATP. tensile, flexural impact strength composites were maximized at FATP content 3 wt%, increased by 13.09, 17.56, 101.92% compared reaching level PP. Due improved compatibility, rPP/FATP...

In this work, a novel α-nucleating agent (NA) for polypropylene (PP) termed APAl-3C-12Li was prepared and evaluated compared with the commercially available type NA-21. For synthesis of organophosphate-type NA (APAl-3C), -OH group acid part NA-21 substituted by isopropoxy group. The structure APAl-3C analyzed spectroscopy element analysis, results which were consistent theoretical molecular formula. APAl-3C's thermal stability studied differential scanning calorimetry (DSC) thermogravimetry...

A new stir bar sorptive extraction (SBSE) based on molecularly imprinted polymer (MIP) with bisphenol as template was prepared. Based it, a simple, selective and sensitive method for the determination of (BPA) developed combined high performance liquid chromatography (HPLC) diode array detection. To achieve optimum performance, several main parameters, including desorption time, nature solvent, pH value contents inorganic salt in sample matrix, were investigated. The optimized parameters BPA...

In this work, a kind of aryl phosphate salt nucleating agent (APAl-12C) was synthesized, which replaced in the hydroxyl group on aluminum hydroxy bis [2,2'-methylene-bis(4,6-di-tert-butylphenyl) phosphate] (APAl-OH) by lauroyloxy, could improve dispersion between and iPP matrix reduce migration potential increasing molecular weight. The structure APAl-12C analyzed fourier infrared spectroscopy (FT-IR ) 1H NMR. differential scanning calorimeter (DSC) results indicated that addition APAl-OH or...

The molecular chains of recycled polyethylene terephthalate (rPET) show breakage during daily use, causing poor crystallization and leading to mechanical properties that, when blended with the nucleating agent, become an effective method solving this problem. salt-nucleating agent sodium benzoate (SB), disodium (DT), trisodium 1,3,5benzene tricarboxylic (TBT) were synthesized, rPET/nucleating blend was prepared. intrinsic viscosity (η) results showed that η rPET/SB decreased, which indicated...

In this work, aiming to improve the flame retardancy performance of high impact polystyrene (HIPS), HIPS compounds were synthesized with addition intumescent retardant (IFR: mass ratio APP and PER was 3:1) diatoms into matrix by melt blending method. It found IFR/diatoms system exhibited efficiency catalytic carbonization effect in burning process. The LOI value HIPS-2 compound 28 wt% IFR 2 increased 29.0% passed V-0 rating. PHRR for is about 460.58 kW/m2 compared 937.22 pure THR 32.9 MJ/m2...

A new stir bar sorptive extraction ( SBSE) coating based on molecularly imprinted polymer MIP) with diethylstilbestrol as replaced template molecule was prepared.The influences of the contents and monomer in polymerization mixture performance MIP-SBSE were investigated thoroughly.The MIP characterized by elemental analysis, scanning electron microscopy infrared spectroscopy.In order to evaluate usability coating, combined high liquid chromatography HPLC) diode array detector DAD) dienestrol...