Scientific Reports
·
2024
·Vol. 14
·期 1
·1-11
·
IF 3.8
Yumang Zhang,Yongheng Wang,Chengyu Wang,Yunhang Gao,Shuxia Liu,Zhonglei Xie,Hongyan Chang
Using polyaspartic acid (PAsp) and bentonite (BT) as the main raw materials, a new type of degradable soil water retaining agent (PAsp-AA/BT) was synthesized by microwave radiation. The optimum synthesis conditions and comprehensive properties of PAsp-AA/BT were discussed and the structure and surface characteristics of PAspsp-AA/BT were characterized by FTIR, SEM, XRD and TGA in the paper. The results showed that the optimum synthesis conditions of PAsp-AA/BT were as follows: the dosages of polyaspartic acid (PAsp), bentonite (BT), initiator potassium persulfate, crosslinking agent N , N ′-methylene bisacrylamide was 5, 3, 0.3, 0.03%, respectively, the neutralization degree of acrylic acid was 75%, and the microwave power was 490W. Under this condition, the absorption ratio of the synthesized PAspsp-AA/BT in deionized water and 0.9% NaCl solution was 953 and 164 g/g, respectively. The synthesized PAsp-AA/BT had a high water absorption rate, good water retention and repeated water absorption, and the degradation rate in soil within 30 days reached 32.75%, with good degradation effect. The analysis of SEM, FT-IR, XRD and TGA showed that: the surface of PAsp-AA/BT was rough and had obvious pore structure, which was conducive to the diffusion of water molecules; polyaspartic acid, bentonite and acrylic acid were polymerized; the cross-linking structure was formed between polyaspartic acid, bentonite and acrylic acid; the product of PASP-AA/BT had good thermal stability. This study provides a new soil water retaining agent, which is helpful for the better development of soil water retaining agent research.
研究领域:
材料科学
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环境科学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Sha Cheng,Xiaomei Liu,Jianghong Zhen,Ziqiang Lei
To study the application of superabsorbent resin (SAR) in preventing water evaporation in soil, hydroxymethyl cellulose sodium-g-poly (acrylic acid-co-2- acrylamido-2-methyl-1-propanesulfonic acid)/laterite (NaHMC-g-P (AA-co-AMPS)/ laterite) was prepared by radical polymerization. The structure and morphology of SAR were characterized by FTIR, SEM and TGA. The factors affecting the water absorbency of SAR were studied and the water absorption of the resin under the optimum synthetic conditions reached the equilibrium at 15 min in distilled water, and the optimum water absorption of SAR was 1329 g/g, 269 g/g and 140 g/g in distilled water, tap water and 0.9 wt% NaCl solution, respectively. The swelling kinetic mechanism of the SAR was explained by the pseudo-second-order swelling kinetics model and Ritger-Peppas model. The effects of soil type, particle size and content of SAR on water evaporation rate in soil were studied.
研究领域:
材料科学
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环境科学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Jialve Zhang,Yanli Shi,Zhengyue Wu,Xvbo Zhang,Yujing Zhang,Picheng Chen,Chuanhui Gao,Yumin Wu,Yuetao Liu
The development of materials with high water absorption, long-lasting water retention, and frost resistance is of great significance for the development of arid, semi-arid, and cold regions. This study utilized acrylic acid (AA), acrylamide (AM), 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS), and N , N ′-methylenebisacrylamide (MBA) as precursors to construct a covalently crosslinked rigid network through free radical polymerization, while sodium carboxymethyl cellulose (CMC) and Ca 2+ ions were introduced to fabricate the flexible network via non-covalent interactions, yielding a PAA-AM-AMPS/CMC dual-network hydrogel with a three-dimensional architecture. The resultant hydrogel exhibited a water absorption capacity of 1435 g/g in aqueous solution, and the soil combined with 1 wt% hydrogel attained a remarkable water holding capacity of 156 %. It maintained 25 % moisture after 20 days and exhibited only a 23 % reduction in water retention after fifteen cycles, so illustrating exceptional water retention capabilities. Moreover, the compact dual-network structure endowed the hydrogel with a stress of 0.248 MPa and a fracture elongation of 1280 %, concurrently reducing the freezing point to −33.15 °C, significantly enhanced the hydrogel's mechanical properties and ultra-freeze resistance. Soil combined with 15 % hydrogel exhibited a freezing point decreased to −13.03 °C and maintained 70.16 % unfrozen water following freezing at −20 °C. Thus, the PAA-AM-AMPS/CMC hydrogel demonstrates exceptional capabilities in water absorption, soil water retention, and freeze resistance, which has considerable implications for efficient water resource management under extreme conditions.
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Yafu Tang,Yuechao Yang,Dongdong Cheng,Bin Gao,Yongshan Wan,Yuncong C. Li,Yuanyuan Yao,Jiazhuo Xie,Lu Liu
To improve fertilizer use efficiency, reduce irrigation requirement, and minimize negative environmental impact, a novel large-grained-activated-lignite-slow-release fertilizer (LAF) with good water retention was developed by mechanical extrusion of activated lignite and conventional fertilizer. A 3D molybdate-sulfur hierarchical hollow nanosphere (3D-MoS2–HN) catalyst was successfully fabricated via a simple route, and the lignite was activated by 3D-MoS2–HN to increase its water-soluble humic acid content and nutrient adsorption ability. After activation, the amounts of small molecular active groups and water-soluble humic acid of activated lignite were significantly higher than those of raw lignite. The activation also increased adsorption ability of the activated lignite for nutrients. LAF prepared from the activated lignite had a preferable slow-release property and good water-holding capacity in soil. Moreover, a pot trial further demonstrated that LAF effectively improved the growth of an apple plant. With outstanding water-retention and slow-release capacities, this new fertilizer is economical and eco-friendly, and thus is promising in field applications.
研究领域:
农业科学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Yuankai Zhou,Xiaohao Guo,Zhiwen Li,Wei Liu,Wanqing Yang,Yalan Zhang,Hu Du,Evgeny Abakumov,Daishe Wu,Yongdong Zhang,Jianjun Dai,Ping Zhang,Fang Yao,Xianchuan Xie
Persistent dry conditions have significantly affected agricultural productivity, while also posing a threat to food security. To alleviate the effects of aridity, superabsorbent polymers have been widely used to improve soil water retention and increase drought tolerance in the soil recently. However, most of their raw materials originate from petroleum-based materials, which raises concerns about their biodegradability and environmental effect. This study focuses on creating cow dung-based superabsorbent polymers (CDSP) with excellent swelling capacities, achieving up to 494 g/g at solubilization equilibrium due to its porous properties and excellent water affinity. After five cycles, the swelling ratio of the group with better performance remained at nearly 300 g/g. The water retention capacity of the soil amended with CDSP increased by 1–3 times compared to the original, with the duration of water retention extending from 51 h to 72–120 h. More interestingly, CDSP improved soil pore structure and plant drought resistance, extending the survival time of plant under water deficit and increasing fresh plant weight by up to 2.6 times. These findings demonstrated the CDSP as a potential soil enhancer and a solution to climate-induced drought challenge, showing their effectiveness in sustainable agricultural development and waste resource utilization.
研究领域:
农业科学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2011
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IF 2.816
Boli Ni,Mingzhu Liu,Shaoyu Lü,Lihua Xie,Yanfang Wang
To sustain the further world population, more fertilizers are required, which may become an environmental hazard, unless adequate technical and socioeconomic impacts are addressed. In the current study, slow-release formulations of nitrogen fertilizer were developed on the basis of natural attapulgite (APT) clay, ethylcellulose (EC) film, and sodium carboxymethylcellulose/hydroxyethylcellulose (CMC/HEC) hydrogel. The structural and chemical characteristics of the product were examined. The release profiles of urea, ammonium sulfate, and ammonium chloride as nitrogen fertilizer substrates were determined in soil. To further compare the release profiles of nitrogen from different fertilizer substrates, a mathematical model for nutrient release from the coated fertilizer was applied to calculate the diffusion coefficient D. The influence of the product on water-holding and water-retention capacities of soil was determined. The experimental data indicated that the product can effectively reduce nutrient loss, improve use efficiency of water, and prolong irrigation cycles in drought-prone environments.
研究领域:
农业科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Soft Matter
·
2024
·Vol. 20
·期 7
·1438-1446
·
IF 2.9
Yan Liu,Fangzhi Duan,Yongfeng Zhu,Xicun Wang,Li Zong,Aiqin Wang
Rapid water absorption is very important for the application of superabsorbent polymers under dry or semi-dry conditions, but there are currently few relevant studies. In this context, a novel porous superabsorbent of chitosan-grafted acrylic copolymer-2-acrylamido-2-methylpropanesulfonic acid/sapindus mukorossi pericarp/calcined oil shale semi-coke (CS-g-P(AA-co-AMPS)/SMP/COSSC) was prepared by a green and convenient foam template method, which was triggered by redox polymerization. The rich pore structure of the porous superabsorbent was conducive to accelerating the water absorption rate. It only took 15 min to reach a swelling capacity of 650 g g−1 in distilled water. Soil experiments show that even with the addition of 0.5 wt% porous superabsorbent, the soil water retention time can be extended to 7 days. Finally, it was applied to the growth of cabbage seeds and it was found that the growth was significantly improved. Based on these excellent properties, we expect to provide a valuable reference for the preparation of fast-absorbing materials through the green water-based foam template method, contributing to sustainable agriculture.
研究领域:
材料科学
·
农业科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）