Article
Polymer Science
Juan Matmin, Salizatul Ilyana Ibrahim, Mohd Hayrie Mohd Hatta, Raidah Ricky Marzuki, Khairulazhar Jumbri, Nik Ahmad Nizam Nik Malek
Summary: The purpose of this study is to assess the water-polymer interaction in synthesized starch-derived superabsorbent polymer (S-SAP) for the treatment of solid waste sludge. By analyzing the amylose unit, it was found that hydrogen bonding formed between starch and water. Experimental results showed that S-SAP has high water capacity and water retention, making it suitable for the treatment of waste sludge and the development of water removal technology.
Article
Polymer Science
Xiaosai Hu, Chenyang Wang, Haiyang Yu
Summary: Superabsorbent polymers (SAPs) are being extensively researched in various fields due to their excellent water-absorbing abilities. Cross-linkers, including chemical and nanoparticle cross-linkers, play a crucial role in determining the water absorption performance of SAPs. However, the sustainable development of SAPs has been hindered by the limitations of these cross-linkers. In this study, sodium tungstate (STD) was introduced as a new cross-linker to enhance the water-holding capabilities of SAPs. The resulting poly(acrylic acid)/STD SAP exhibited high water-absorbing capacities in different solutions, indicating the potential of STD as a novel cross-linker for promoting the green development of SAPs.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Agronomy
Konstantin Korsakov, Alexey Stepanov, Lev Pozdnyakov, Olga Yakimenko
Summary: The effects of three types of urea fertilizers on soil N transformation processes were examined in a laboratory experiment. It was found that humate-coated urea (U_HA) showed advantages in reducing N losses, increasing N-NH4 content, and decreasing N2O emissions compared to conventional urea. U_HA also promoted soil respiration and microbial activity, making it a promising tool for reducing N losses in soils.
Article
Chemistry, Physical
Yi Zong, Pan Xu, Haoyu Yue, Xinxue Li
Summary: A water-soluble graft-copolymer HPMC-g-poly(AM/AA/APEG2400) was synthesized via free-radical copolymerization and demonstrated improved stability and salt resistance for profile control in high-temperature and high-salinity reservoirs. It also showed potential for hydrogel preparation with tunable gelation time and excellent long-term stability.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Review
Chemistry, Multidisciplinary
Minmin Yang, Jihuai Wu, Geoffrey M. Graham, Jianming Lin, Miaoliang Huang
Summary: Through analyzing research hotspots, top research clusters, influential works, representative literature, and emerging trends in SAP research, the study provides a visual panorama of the continuously increasing research over the past 20 years and identifies issues behind the sharp increase in publications.
FRONTIERS IN CHEMISTRY
(2021)
Article
Polymer Science
Yong-Rok Kwon, Jung-Soo Kim, Dong-Hyun Kim
Summary: A superabsorbent polymer (SAP) was synthesized by copolymerizing itaconic acid and vinyl sulfonic acid, the low absorbency was improved by introducing surface crosslinking. Various conditions for surface-crosslinking reactions were explored and correlated with the gel strength and absorption characteristics of the resulting SAP particles. Itaconic acid-based SAP that was crosslinked under optimal conditions exhibited good water absorption performance.
Article
Materials Science, Paper & Wood
Enfa Fu, Sijia Zhang, Yu Luan, Yuting Zhang, Summaira Saghir, Zhenggang Xiao
Summary: In this study, a new superabsorbent polymer composite was synthesized by adding biodegradable and renewable natural materials. The composite exhibited excellent water absorbency and retention capacity, making it a promising water-keeping material for agricultural and horticultural applications.
Article
Construction & Building Technology
Gerlinde Lefever, Danny Van Hemelrijck, Dimitrios G. Aggelis, Didier Snoeck
Summary: Research has found that adding superabsorbent polymers can enhance the repair ability of concrete infrastructure, and appropriate evaluation techniques are necessary to test its effectiveness. Using ultrasonic wave through transmission for non-destructive testing can help visualize the internal details of self-healing concrete materials and determine the healing effects over different time periods.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Chemical
Jie Song, Xi Li, Yuhua Niu, Lijun Chen, Zhiqiang Wei, Yidan Li, Youqian Wang
Summary: To enhance drug utilization and minimize side effects, researchers prepared (KHA/CMC-Fe3+)@CS hydrogel spheres using natural potassium humate (KHA), carboxymethyl cellulose (CMC), and chitosan (CS) as raw materials. The spheres exhibited pH-sensitivity, higher swelling in alkaline conditions, and followed Schott second-order swelling kinetics. The drug release mechanism was found to be Fickian delivery mode.
Article
Materials Science, Multidisciplinary
Hyesun Choi, Jongshin Park, Jiwon Lee
Summary: This study prepared an environmentally friendly superabsorbent hydrogel based on itaconic acid. The hydrogel demonstrated high water absorption and reswelling capacities. Analysis of the swelling kinetics showed a good relationship. Additionally, the hydrogel showed excellent low-temperature maintenance capability, making it promising for applications such as commercial ice packs.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Applied
Doan Van Hong Thien, Duc-Ninh Lam, Huynh Ngoc Diem, Thi Yen Nhu Pham, Nhat Quang Bui, Ta Nguyen Thanh Truc, Dan-Thuy Van-Pham
Summary: This study synthesized cellulose-g-poly(acrylic acid) with high water absorbency using cellulose extracted from pineapple leaves. By controlling the concentrations of the cross-linker and the initiator, the synthesized product demonstrated excellent water absorbency in both distilled water and saline solutions, showing great potential for agricultural applications.
CARBOHYDRATE POLYMERS
(2022)
Article
Biochemistry & Molecular Biology
Abdelfattah Darwish, Naglaa Salem El-Sayed, Sherief A. Al Kiey, Samir Kamel, Gamal Turky
Summary: This study investigates the dielectric behavior of a polyanionic electrically conductive superabsorbent hydrogel based on sodium alginate-g-poly(AM-co-ECA-co-AMPS) using broadband dielectric spectroscopy (BDS). It reveals that the dielectric spectra show three distinctive processes: electrode polarization, charge carrier's transport, and a molecular relaxation process. The effects of temperature and reduced graphene oxide (rGO) content are analyzed, and the results suggest the potential application of the hydrogel in forms of energy storage such as supercapacitors. The composite hydrogel with 2.5% rGO content exhibits excellent electrochemical capabilities.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Environmental
Haizhou Tian, Sha Cheng, Jianghong Zhen, Ziqiang Lei
Summary: The rapid evaporation of water in arid areas is a serious problem for plant growth due to water shortage. In this study, a superabsorbent polymer with excellent water absorbency was synthesized through aqueous solution polymerization. The polymer demonstrated satisfying performances including high water absorbency, long water retention, and fast swelling under different conditions. The research also showed that the polymer could effectively inhibit soil water evaporation, providing a new direction for the application of superabsorbent polymers.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Biochemistry & Molecular Biology
Eldotbieta Czarnecka, Jacek Nowaczyk
Summary: Three polymers with excellent absorption properties were synthesized by graft polymerization using different initiators and crosslinking agents. The molecular structure of the grafted potato and soluble starch was characterized, and the absorption properties were tested in various solutions. The thermal stability, morphological properties, and absorption capabilities were studied using FTIR, SEM, and thermogravimetric measurements.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Biochemistry & Molecular Biology
Elzbieta Czarnecka, Jacek Nowaczyk, Miroslawa Prochon, Anna Masek
Summary: This study focuses on the development of a superabsorbent polymer material that exhibits high fluid absorbance and biodegradability. The swelling and dehydration kinetics of hydrogels formed by grafting polymerization of carboxymethyl starch and chitosan were studied, and the surface morphology and texture properties of the hydrogels were observed using scanning electron microscopy. Spectroscopic analyses confirmed the formation of acetal crosslink bridges including vanillin molecules.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
