JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 24
·e53955
·
IF 3
Xiaodong Bai,Licheng Deng,Yancheng Yan,Hua Hu,Yumei Luo,Xuetong Cai
Lost circulation will cause huge economic losses every year. In order to effectively reduce the harm of lost circulation to drilling, it is particularly important to use reasonable and efficient lost circulation materials (LCM). As a kind of water-absorbing, expandable and deformable LCM, water-absorbing resin can adapt to holes and cracks of different sizes. In this study, a kind of encapsulated water-absorbing resin LCM (PMMA/PNAD) was proposed. The water-absorbing resin is synthesized by acrylamide (AM), 2-acrylamide-2-methyl-propane sulfonic acid (APMS) and diallyl dimethyl ammonium chloride (DMDAAC) as reaction monomers through aqueous solution polymerization. The shell material is polymethylmethacrylate (PMMA), which is coated on the surface of the water-absorbing resin by oil phase separation method. The results of the experimental evaluation indicate that the water-absorbing resin possesses robust water-absorbing and swelling properties, which significantly affect the rheological properties of the drilling fluid. However, the coated shell can effectively mitigate the impact of the absorbent resin on the drilling fluid. Under the formation environment of 100°C or 2 Mpa, the shell can soften or break to release the absorbent resin. The lost circulation control performance test results show that PMMA/PNAD has good pressure bearing capacity, and can still maintain good lost circulation control at 6.9 Mpa.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 48
·46892
·
IF 1.901
H.L. Guan,D.L. Yong,M.X. Fan,X.L. Yu,Z. Wang,J.J. Liu,J.B. Li
The superabsorbent resin (SAR) containing sodium humate (SH) has been synthesized by free-radical graft copolymerization with acrylic acid, 2-acrylamido-2-methylpropane sulfonic acid, and SH as monomers in aqueous solution, using N,N ′-methylenebisacrylamide as crosslinking reagent and potassium persulfate as initiator. The structure and morphology of the as-prepared SARs were fully characterized by Fourier transform infrared , scanning electron microscopy and thermogravimetric analysis, respectively. Meanwhile, the effects of crosslinking reagent, initiator, SH, and neutralization degree on the water absorbency of SAR were studied. The results showed that the adding of SH in the SAR enhanced the salt-tolerating and moisture-resisting capacities obviously. The SAR without SH [poly(acrylic acid) (PAA)/2-acrylamido-2-methyl-1-propanesulfonic (AMPS)] showed a maximum water absorbency of 600 g g −1 in distilled water and 60 g g −1 in 0.9 wt % NaCl solution, while SAR modified by SH (PAA/AMPS/SH) exhibited the maximum water absorbency of 1380 g g −1 in distilled water and 117 g g −1 in 0.9 wt % NaCl solution. Furthermore, the moisture-resisting capacity of PAA/AMPS/SH decreases to 8 wt % compared with PAA/AMPS. PAA/AMPS/SH also has better water absorbency in different cation solutions. The results indicated that the introduction of SH could enhance the performance of SAR obviously. The possible reasons with this enhancement were also investigated. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46892.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Wenxia Sima,Kaisen Fan,Potao Sun,Tao Yuan,Ming Yang,Zhaoping Li,Fengqi Liu,Yao Yuan
Repairing the micro-scale damage of insulating materials under a strong electric field has long been a highly desired but challenging task. Among all kinds of damage, water tree damage in the insulating materials of electrical equipment and electronic devices working in humid environments has long been considered irreparable. The main challenge is that residual water prevents the healing agent from filling the water tree branch channel. To solve this problem, this work reports a magnetically targeted, water-triggered, self-healing microcapsule (MTWTSH-MC) that makes a breakthrough against water tree damage based on microfluidic techniques. Targeted microcapsules driven by a directional magnetic field are concentrated to the vulnerable area of the insulating materials, exerting very limited effects on the dielectric. When damage breaks the microcapsules, the healing agent releases and quickly fills the damage channel and then reacts with water in the air or in the branch channel of the water tree, achieving solidification of the healing agent and self-healing of the damage channels. In this way, we can realize self-perception, self-triggering, and self-healing for both mechanical damage and water tree damage in insulation materials without any external stimulation.
研究领域:
材料科学
·
电气工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Qi Kong,Honglei Mu,Yanchao Han,Weijie Wu,Chuan Tong,Xiangjun Fang,Ruiling Liu,Hangjun Chen,Haiyan Gao
In order to develop biodegradable phase change materials (PCMs) with high latent heat for cold chain logistics, superabsorbent resin (SAR) was prepared based on starch graft copolymerization. FTIR and DSC demonstrated that acrylic acid was successfully grafted onto starches and optimum latent heat of PCM was 330.4 J/g with 10% (w/w) starch. The water retention of PCM with 10% (w/w) starch was 0.49 after heating at 50 °C for 200 h, which was 4.9 folds higher than that of non-starch PCM. Biodegradation rate of PCM was 60.12% within 75-day burial, which was 6 folds higher than that of non-starch PCM. Moreover, significant reduction in browning index, odor, decay, relative conductivity and malondialdehyde (MDA) content was observed in Lentinus edodes treated by biodegradable PCM. These results indicated that the application of biodegradable PCM could extend the shelf life of fresh L. edodes stored at 25 °C.
研究领域:
食品科学
·
材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Qiang Liu,Yitao Yu,Guanglai Zhu,Haiming Liu,Chuanxing Jiang,Wei Zhang,Yuanyue Li,Qiang Xue,Yong Wan,Bing Li,Xian Zhang,Caifeng Dai,Zhenhua Wang
The hybrid super absorbent resin (SAR), Poly(acrylicacid-co-acrylamide-co-2-acrylamido-2-methyl-1-propane sulfonic acid) based on zeolite synthesized from solid waste slag (P(AA-co-AM-co-AMPS)/zeolite) was synthesized. The chemical and structural characteristics of the materials were examined through FTIR, XRD , and SEM studies. In the presence of zeolite, the flat surface of the composite transformed into interconnected porous structure . The deionized water equilibrium swelling capacity of the hybridized SAR (835.79 g/g) was higher than that of the pure SAR (524.53 g/g). As much as 40 % of the water was released from the fully swollen hybrid SAR when it was centrifuged. P(AA-co-AM-co-AMPS)/zeolite had a swelling loss rate just of 27.64 % after five swelling/drying cycles. In addition, it still had good absorption in ionic salt solutions of different concentrations and good water retention at different temperatures. This confirmed that the hybridized SAR had excellent water holding capacity and salt solution adsorption. The FTIR and XRD results showed that the excellent performance of the hybridized SAR may originate from the interconnection of the zeolite and the pure SAR. The P(AA-co-AM-co-AMPS)/zeolite may be utilized as an agricultural water retaining agent.
研究领域:
材料科学
·
环境科学
·
农业科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Pan Gou,Yuanli Xiang,Lin Ye,Sijiang Liu,Xiaowen Zhao
Superabsorbent resins (SARs) have been developed to improve water management in agriculture. Injectable SARs offer significant potential for enhancing plant growth by penetrating deeply into the soil prior to gelation; however, relevant research remains scarce. In this study, injectable starch-based SARs were synthesised via a straightforward two-step process. Initially, hydrophilic polar groups were grafted onto the starch backbone, followed by crosslinking with pentaerythritol tris [3-(1-aziridinyl) propionate] (PTAP). This approach conferred both injectability and underwater gelation capabilities to the system. By adjusting the starch content, the time required for the gelation precursor to reach clogging and gelation points was significantly extended. Additionally, the effective injection ratio was enhanced, and macromolecular diffusion into water was inhibited, resulting in excellent injectability. The equilibrium swelling ratio of the resin reached 517.62 g/g with high water retention ratio. Because the contact angles of the gelation precursor on wood, glass, and aluminium surfaces were lower than those of water, it effectively displaced interfacial water, enabling strong underwater adhesion to the substrates. The gelation precursor effectively penetrated the crevices of wet sandstone and adhered the fragments without dispersal, highlighting its potential for applications in agricultural water retention and sandstone stabilisation.
研究领域:
材料科学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2020
·Vol. 28
·期 10
·2702-2709
·
IF 2.572
Yu Xianglin,Cheng Kai,Xiang Yu,Mei Hua,Wang Jiapei,Li Junbo
A superabsorbent resin (SAR) with good degradability was prepared with acrylic acid (AA), acrylamide (AM), 2-acrylamido-2-methylpropane sulfonic acid (AMPS), organic montmorillonite (OMMT) and titanium dioxide (TiO 2 ) through inverse suspension polymerization, using potassium persulfate (KPS) as initiator and N,N-methylenebisacrylamide (MBA) as crosslinker. The structure and micrographs of the SAR were fully characterized with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD). Meanwhile, the effects of major factors such as initiator, crosslinker, OMMT and TiO 2 contents and the oil–water ratio on liquid absorbency were investigated, which reached 769.3 g/g in distilled water and 91.1 g/g in 0.9wt% NaCl solution, respectively. The equilibrium degradation performances were evaluated under the optimum conditions by the mass loss of the SAR in the soil and under the ultraviolet light, which reached 32.3wt% after 120 days and 83.9wt% after 40 h, respectively. The introduction of OMMT promoted the photodegradability obviously. The maximum photodgradation of PAA/TiO 2 SAR reached 74.3wt% after 60 h, which was lower than the PAA/OMMT/TiO 2 SAR. The degradable SAR has an encouraging potential for agricultural and forestry applications.
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
高影响因子
POLYMER BULLETIN
·
2024
·
IF 3.1
Yu Kun,Liu Jiangrong,Li Huiting,Li Bing,Guo Jianzhong
Superabsorbent hydrogels demonstrate positive significance as water-retaining materials in agriculture and gardens. The super water-retaining hydrogel (BASA) based on the bamboo powder with the rich sulfonic acid group and carboxyl group was successfully and efficiently synthesized by ultrasonic wave-assisted and polymerization methods. The preparation process has the advantages of mild conditions and process simplification. The impact of reaction conditions (the ionic strength, pH value, cross-linking agent and initiator content) was systematically studied. Characterization methods such as elemental analysis, FTIR, SEM and TGA indicated that the synthesized super water-retaining agent had excellent water retention properties and good stability. The maximal absorbent capacities in ultrapure water and rainwater reached 1047 g g −1 and 952 g g −1 , respectively. The water retention properties of BASA were affected by the water quality and ionic strength of water solution. The swelling process is mainly the hydrogen bonding between the active group and the hydrogen atom of the water molecule and the electrostatic interaction of anionic groups such as sulfonic acid groups, but it also includes the synergistic effect of diffusion process. The outcomes demonstrate that BASA is a powerful water absorption hydrogel for soil water retention agent in the agricultural field.
研究领域:
农业科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2018
·
IF 0
Xianglin Yu,Zhe Wang,Jiajun Liu,Hua Mei,Dingli Yong,Junbo Li
A sodium humated (SH) modified superabsorbent resin (SAR), which had good water absorbency and slow-release fertilizer properties has been successfully prepared by inverse suspension polymerization. The structure and morphology of the as-prepared SAR was characterized by Fourier Transform Infrared Spectroscopy (FTIR), Optical Microscope (OM) and Thermogravimetric Analysis (TGA). The effect of initiator content, crosslinker content, oil-water ratio and temperature on the water absorbency of the SAR was investigated. Under optimum conditions, the water absorbency reached 1097 g/g and 103 g/g in deionized water and 0.9 wt% NaCl solution, respectively. The moisture resistance capacity of SAR with SH increased to 2%. What’s more, the SH modified SAR also had better water absorbency in different cation solutions. The slow-release test showed a two-stage release characteristic of SAR that fast rate in first 12 days (carbon content reached 0.218 mg / 5 ml) and slow rate from 12 to 30 days (carbon content reached 0.242 mg / 5 ml). The degradation performance test showed that degradation rate of the SAR in soil could reach 31.9% after 100 days.
研究领域:
材料科学
·
农业科学
✓ 已验证
DOI
POLYMER
·
2025
·
IF 4.5
Bo Zhu,Xu Sun,Yu Feng,Ji Liu,Xinyu Tao,Bo Yang
A microcapsule/XLPE composite material based on reversible Diels-Alder(DA) reaction was designed to solve the problem of electro-hydro hybrid tree aging in cross-linked polyethylene (XLPE) cables during long-term operation. Light-water dual-responsive microcapsules were prepared by in-situ polymerization using hyperbranched polysiloxane containing furan functional groups and linear polysiloxane containing furan and maleimide functional groups introduced by C C covalent bond as core materials and urea-formaldehyde resin as wall materials. A series of composites was prepared by regulating the doping concentration of microcapsules, and their insulation properties were tested. The effect of the doping content of microcapsules on the properties of materials was analyzed, and the multiple self-healing mechanism of microcapsule/XLPE composite was revealed. The results show that when the microcapsule doping concentration is 1 wt%, the composite material can self-heal while maintaining the intrinsic insulation performance of XLPE. Under the condition of thermal triggering, the dynamic reconstruction of the reversible bond enables the material to achieve dual repair of water tree and electrical tree damage, and maintains more than 80 % of the insulation performance after three times of damage-repair, which provides a new strategy for the intelligent design and life extension of high voltage cable insulation materials.
研究领域:
高分子材料科学
·
电气绝缘工程
·
功能复合材料
·
智能材料
·
电力电缆技术
✓ 已验证
产品关联
DOI
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
·
环境科学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2024
·
IF 4.1
Zhu Bo,Yang Bo,He Shengkun,Sun Hao,Wei Xinlao
To inhibit and repair the damage to cable insulation caused by the formation of water tree structure by micro water droplets at insulation defects in low-density polyethylene (LDPE) materials under the action of an AC electric field. In this paper, using low-density polyethylene as the matrix, we investigate the effects of graft modification and nano-doping on the growth of water trees in LDPE materials and design LDPE composite insulating materials with different components. Accelerated water tree aging experiments were carried out using the water needle electrode method to analyze the repair ability of grafted monomers on the damaged area of the water tree. Through the observation of OM, SEM, and FDS of the materials before and after aging, it is shown that the LDPE composite insulating material doped with a small amount of nano-SiO 2 has a good self-repairing property of water tree. By testing the insulation and mechanical properties of the aged LDPE composite insulation material doped with a small amount of nano-SiO 2 , it was found that both could be restored to about 90 % of the pure sample, indicating that the self-healing performance of the composite material is very excellent. The research in this paper not only improves the online service life of the cable but also provides a new idea for repairing LDPE cable insulation materials, which has good research prospects in practical applications.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）