A new approach for blending waste plastics processing: Superabsorbent resin synthesis

Zhang, Junping; Zhang, Fu-Shen

doi:10.1016/j.jclepro.2018.06.222

Cited by 55 publications

(21 citation statements)

References 46 publications

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“…The pseudo-second order swelling kinetics model (Equation ( 3)) and the Ritger-Peppas model (Equation ( 4)) were used to analyze the experimental swelling data to evaluate the swelling behavior of SAPC, with results shown in Figure 6a,b [40][41][42]:…”

Section: Performance Tests Of Sapc 361 Swelling Kinetics Of Sapc In Distilled Watermentioning

confidence: 99%

Kaolin-Enhanced Superabsorbent Composites: Synthesis, Characterization and Swelling Behaviors

Chen

Zhang

et al. 2021

Polymers

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One type of low-cost and eco-friendly organic‒inorganic superabsorbent composite (SAPC) was synthesized by free radical polymerization of acrylic acid (AA), starch (ST), sodium alginate (SA) and kaolin (KL) in aqueous solution. The structure and morphology of the SAPC were characterized by Fourier transform infrared spectrometer (FT-IR), scanning electron microscope (SEM), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The influence of different reaction conditions on water absorption of SAPC, i.e., SA and KL contents, AA neutralization degree (ND), potassium persulfate (KPS) and N, N′-methylenebisacrylamide (MBA) loading were systematically studied. Under the optimal synthesis conditions, very high water absorption of 1200 g/g was achieved. The swelling kinetic mechanism of SAPC was studied by pseudo-second order swelling kinetics model and Ritger‒Peppas model. The performances of SAPC under different environments were tested and results revealed that this new SAPC had excellent swelling capacity, high water retention, good salt tolerance in monovalent salt solution (NaCl solution) and good pH tolerance between 4 and 10.

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Section: Performance Tests Of Sapc 361 Swelling Kinetics Of Sapc In Distilled Watermentioning

confidence: 99%

Kaolin-Enhanced Superabsorbent Composites: Synthesis, Characterization and Swelling Behaviors

Chen

Zhang

et al. 2021

Polymers

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“…Figure 8 showed the reswelling capability for PAA/SC superabsorbent composites as a function of reswelling times in distilled water. It can be seen that the PAA/SC (14 wt%), PAA/SC (10 wt%) and PAA/SC (6 wt%) showed good reswelling capability and still retained approximately 66.06%, 61.68% and 55.74% of their initial water absorbency after re-swelling seven times [ 48 ]. These results suggested that the superabsorbent composites of PAA/SC were reusable and recyclable water-absorbing materials, and can be especially useful in agricultural applications.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Eco-Friendly Superabsorbent Composites Based on Waste Semicoke

et al. 2020

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A series of novel superabsorbent composites of poly(acrylic acid)/semicoke were prepared by polymerization of acrylic acid using ammonium persulphate as initiator, N,N′-methylenebisacrylamide as crosslinker and semicoke which was the by-product of coal carbonizing as the inorganic components. FTIR and SEM analysis indicated that the superabsorbent composites had been successfully polymerized and the semicoke participated in construction of the 3D polymeric network. Meanwhile, the effects of initiator, crosslinker, semicoke, and neutralization degree, as well as the pH value, were investigated, and the results showed that superabsorbent composites containing 10% of semicoke possessed the maximum water absorbency of 584 g/g in distilled water and 75 g/g in 0.9% NaCl solution. The superabsorbent composites kept the high water absorbency within a wide pH range of 4–11, and still exhibited better re-swelling capability even after seven times. The superabsorbent composite with its excellent performance is a potential water-retaining agent used in agriculture.

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“…When the neutralization degree is too high, (for instance, over 70%), a large amount of –COONa is produced in the composite. The formation of massive –COO − leads to an increase in ionic strength, which will cause electrostatic screening, preventing further swelling of the gel in saline solution [ 32 ]. As shown in Figure 3 , the optimized neutralization degree was found to be 70%.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Applications of Salt-Resistant Superabsorbent Poly (Acrylic Acid-Acrylamide/Fly Ash) Composite

et al. 2019

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Solution polymerization synthesized alt-resistant superabsorbent poly (acrylic acid-acrylamide/fly ash) composites. The mass ratio of acrylic acid (AA) to acrylamide (AM), the concentration of crosslinker, the neutralization degree (ND) of AA, and the polymerization temperature were investigated by single-factor method. Optimized conditions for the synthesis of poly (acrylic acid-acrylamide/fly ash) (PAA-AM/FA) are, as following: m (AA)/m (AM) is 1.5, the content of crosslinker N, N-methylenebisacrylamide. (MBA) is 0.7%, neutralization degree of AA is 70%, polymerization temperature is 70 °C, and fly ash (FA) content is 50%. The prepared PAA-AM/FA demonstrated superior water absorption performance. The absorption capacities of PAA-AM/FA for pure water and 0.9% NaCl solution were found to be 976 g·g−1 and 81 g·g−1, respectively. Furthermore, PAA-AM/FA was found to have excellent adsorption capacity (148 mg·g−1) for Rhodamine B in water. Fourier Transform-Infrared Spectroscopy (FT-IR), Thermogravimetric Analysis (TGA), and Scanning Electron Microscopy (SEM) characterized the prepared materials. Results showed that fly ash was incorporated into the macromolecular polymer matrix and played a key role in improving the performance of the polymer composites.

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A new approach for blending waste plastics processing: Superabsorbent resin synthesis

Cited by 55 publications

References 46 publications

Kaolin-Enhanced Superabsorbent Composites: Synthesis, Characterization and Swelling Behaviors

Kaolin-Enhanced Superabsorbent Composites: Synthesis, Characterization and Swelling Behaviors

Fabrication of Eco-Friendly Superabsorbent Composites Based on Waste Semicoke

Preparation and Applications of Salt-Resistant Superabsorbent Poly (Acrylic Acid-Acrylamide/Fly Ash) Composite

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