ACS Applied Materials & Interfaces
·
2026
·Vol. 18
·期 31
·43003-43016
·
IF 7.8
Tan Lei,Lu Xuyang,He Wentao,Li Dan,Wei Yen,Qian Yongqiang,Guo Shengwei
Solid−solid phase change materials (SS−PCMs) are promising candidates for solar-cell thermal management because they can buffer heat accumulation through latent heat storage. However, their practical application is still hindered by poor optical transmittance and insufficient mechanical stability. In this work, we present a robust material design strategy to fabricate highly transparent and morphologically stable phase change films via the synergistic crosslinking polymerization of octadecyl acrylate with tailored diacrylate crosslinkers. Measured at 20 ° C (below the transition point), the optimized phase change films demonstrate an exceptional visible light transmittance of up to 96.8% at 700 nm. Systematic investigations reveal that the optical, mechanical (2.8−11.3 MPa), and thermal storage (43−86 J/g) properties can be precisely engineered by modulating the crosslinker architecture and density. Furthermore, integrated application tests as front-encapsulants for monocrystalline silicon solar cells demonstrate that these phase change films provide superior passive thermal management, effectively suppressing heat-induced efficiency degradation. Under continuous solar irradiation, the PCM-encapsulated system extended the temperature-rise delay by 940 s compared to conventional covers, maintaining significantly more stable photovoltaic performance. This work establishes a versatile multifunctional platform for the next generation of photothermal-cooperative energy management systems.
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PubMed
高影响因子
FUEL
·
2026
·
IF 7.8
Saiyi Song,Xiangyu Chen,Xiaojie Feng,Xiaoxiao Wei,Yinghua Sun,Shuqian Xia
The depletion of conventional light oil reserves and the escalating global energy crisis have intensified the strategic imperative to develop unconventional heavy oil resources. However, the efficient extraction and transportation of heavy oil are severely hampered by its inherent high viscosity, primarily caused by elevated contents of asphaltenes. In this work, an oil-soluble polymeric viscosity reducer (MPPMO) was pre-designed using molecular dynamics (MD) simulations and realized by grafting polyethylene glycol monomethyl ether (PGME) onto the PMO backbone to integrate polar functionalities with a long-chain structure. Performance evaluation demonstrated that MPPMO achieves a net viscosity-reduction efficiency of 42.51%, markedly outperforming PMO (35.54%) with a relative improvement of about 20% in high-viscosity crude oil (OIL A, 17951 mPa·s) at 50 °C, while maintaining an exceptional stability over 14 h. Molecular dynamics simulations illustrate that introducing polar groups (–COOH and –O–) enables MPPMO to interact more strongly with asphaltenes than PMO, leading to the breakdown of asphaltene aggregates and viscosity reduction, while the long-chain backbone of MPPMO further inhibits their re-aggregation through steric hindrance. Therefore, these findings support a molecular-design strategy that couples long-chain backbones with multiple polar functional groups to improve the dispersion of asphaltene aggregates and enhance heavy-oil flowability.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 2.8
Fei Chen,Xiaoping Zhang,Guangzheng Zhang,Linlin Mo,Baikang Zhu,Tingyong Wang,Bingyuan Hong,Daiwei Liu
The poor low-temperature flowability of waxy crude oil, stemming from the formation of a continuous wax crystal network, poses a major operational and economic challenge to pipeline transportation. While polymeric pour point depressants (PPDs) and intrinsic asphaltenes are known to exhibit a synergistic flow-enhancing effect, the mechanistic role of PPD molecular architecture—specifically the impact of polar and aromatic functional groups—remains inadequately defined. To address this, a series of structurally tailored comb-like PPDs were synthesized via radical copolymerization of octadecyl acrylate with vinyl acetate (POV), maleic anhydride (POM), or styrene (POS). Their synergistic interactions with asphaltenes (0.75 wt%) in a model waxy oil were systematically deciphered through pour point measurements, rheological analysis, differential scanning calorimetry (DSC), polarized light microscopy, and molecular dynamics (MD) simulations. Results indicate that for oil without asphaltenes, polyoctadecyl acrylate (POA) performed best, lowering the pour point by 9°C. Remarkably, in the presence of asphaltenes, PPDs incorporating polar or aromatic comonomers outperformed POA significantly, with POS-3 achieving a 24°C pour point reduction. Microscopy and MD simulations revealed that polar/aromatic groups enhance PPD-asphaltene interaction, leading to the formation of composite particles that template the growth of larger, more spherical wax crystals, thereby effectively disrupting the three-dimensional network. This work establishes a clear structure-activity relationship and provides a molecular-level design principle for developing high-efficiency composite PPDs, contributing to the fundamental understanding and practical application of flow assurance strategies.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Di Tan,Fandong Meng,Yunxia Ni,Wen Sun,Quan Liu,Xin Wang,Zhekun Shi,Qiang Zhao,Yifeng Lei,Shifang Luan,Longjian Xue
Water-durable adhesives are widely explored in various fields like wearable electronics, tissue engineering and sea refloatation. However, in harsh underwater environment, adhesives with sound and comprehensive performance on various surfaces remain highly challenging. Herein, we report a hydrophobic hydrogel adhesive composed of crystalline octadecyl (C18) chains with versatile, robust and thermally switchable underwater adhesion. The inherent hydrophobicity and the amorphous state of C18 chains allow the hydrogel adhesive to conformally adapt to underwater surfaces, independent of surface energy, curvature, charge and roughness as well as the salinity and pH of the water environment. The crystallization of C18 chains greatly increases the modulus of the hydrogel, interlocking the adhesive to the contacting surfaces and resulting in the underwater adhesion up to 275 kPa. The phase change of hydrogel regulates the stress distribution at the contact interface and the adhesion capacity, resulting in a switchable underwater adhesion. The phase change of C18 chains also endows the hydrogel self-healing property, ensuring durability and reusability. Moreover, the temperature of phase change is around ∼ 40 ℃, endowing adhesive with bio-applications in dynamic watery environments. Therefore, the adhesive is highly potential in emerging areas of wearable electronics, tissue engineering and so on.
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ACS Applied Polymer Materials
·
2022
·
IF 4.855
Xiaoyan He,Wenyu Shi,Nan Sun,Miaomiao Hou,Zheping Tan,Hui Jia,Xiaoquan Lu
Hydrogels with adhesion and conductivity properties have certain applications in the field of strain sensing equipment. With the semi-interpenetrating structure formed by branched polyethylenimine (PEI) and the dynamic cross-linking of hydrophobic microspheres, a hydrogel with universal adhesion, conductivity, stretchability, and transparency was successfully prepared. The hydrophobic microspheres formed by the hydrophobic monomer octadecyl acrylate (C18) can enhance the mechanical properties of the hydrogel. The introduction of branched PEI gives the hydrogel excellent stretchability; the optimal tensile strain is 903%. The hydrogel is endowed with a broad spectrum of adhesion, making it have good adhesion to organic, inorganic, and biological skin. The presence of mobile ions in the hydrogel network makes it have a certain degree of conductivity. At the same time, the hydrogel can show a response to different strains (10%, 50%, 100%) and weights (20 g, 50 g, 100 g, 200 g) through changes in resistivity. Subsequently, the hydrogel is attached to the wrist and finger joints to detect the impact on the human body. Experimental results prove that this hydrogel has the potential to be applied to strain sensors and can sense and detect changes in human joints through ionic conduction and resistance changes caused by shape deformation.
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COMPLEXITY
·
2021
·
IF 2.833
Zhenfu Ma,Kai Zhang,Mengjie Zhao,Lu Liu,Chao Zhong,Jian Wang
In view of the problems of low permeability, high oil viscosity and freezing point, and low productivity of single well in Luo 321 and Luo 36 blocks of Luojia Oilfield, the chemical viscosity-reducing cold production technology was studied. By analyzing the properties of crude oil, it is concluded that the reason for high viscosity and high freezing point is the high content of asphaltene, pectin, and wax. The viscosity is mainly affected by asphaltene; the wax precipitation point and pour point are mainly affected by the wax; and the solidification point is affected by the wax and asphaltene. The treatment idea of reducing viscosity and inhibiting wax is determined. By compounding the synthetic pour point depressant POA-VA and the viscosity reducer DBD-DOPAMA, the effect of reducing the viscosity and freezing point of crude oil was evaluated. PD-7 (POA-VA 40%, DBD-DOPAMA 50%, and P-10C 10%) system was selected as the optimal formula. When the concentration of the system is 10%, the viscosity reduction rate reaches 95.2%; the freezing point can reduce by 10.2°C; it has good oil sample adaptability, salinity resistance, and temperature resistance; and the oil washing rate can reach more than 60%. The oil displacement system was injected into the formation by means of multiconcentration and multislug and was applied in the field of Luo 321-2 Well. A total of 500 t of the oil displacement system was injected, and the effect of measures lasted for 400 days, with a cumulative oil increase of 883 t. It has been applied in different blocks 30 times and achieved a good field application effect.
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高影响因子
POLYMER
·
2023
·
IF 4.6
Bailin Shan,Yan Wu,Xuejuan Cao,Boming Tang,Kuiling Wei
Self-healing polymers have attracted extensively interests to improving durability of materials. A promising strategy to prepare self-healing materials is the incorporation of dynamic disulfide bonds into polymer backbones. In this study, a novel hydrophobic chain extender containing disulfide bond (CY-OA) has been successfully synthesized and used to elevate the practical application capability of the self-healing WPU . FT-IR and Raman spectra confirmed that the disulfide bonds were successfully incorporated into the polyurethane backbones. The synthetic self-healing waterborne polyurethanes (SHWPUs) all had the high-water contact angle above 108 ° and the low water absorption below 5%, exhibiting the good hydrophobicity and water resistance. Increasing addition of CY-OA simultaneously optimized the mechanical properties and self-healing efficiency of SHWPUs. The mechanical properties of repaired SHWPU-4 film had been almost recovered to its original values (tensile strength and elongation at break were 12.79 MPa and 1003%) at 120 °C for 1 h. Meanwhile, the feature of dynamic disulfide bonds produced a relatively low activation energy of 54.78 kJ/mol, resulting in a good self-healing efficiency of 93%. Therefore, this hydrophobic self-healing WPU contributed the scratch resistance, water resistance, reprocess ability and further got the feasibility of practical applications.
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POLYMER DEGRADATION AND STABILITY
·
2021
·
IF 5.03
Weijie Ning,Yawen Yang,Ding Zhang,Renming Pan
Common ultrafine powder fire extinguishing agent couldn't put out the oil fire. To solve this problem, a simple and controllable way for preparing hydrophobic and oleophobic fire extinguishing agent was developed. Firstly, fluorinated acrylate copolymers (FP) with different fluorine contents were prepared and used to modify the extinguishing agent. Unlike perfluorooctane sulphonate/ perfluorooctanoic acids (PFOS/PFOA) with C8-fluorocarbon chains widely used as modifiers, the prepared FP with C6-fluorocarbon chains not only met the environmental standards, but also possessed excellent properties. Subsequently, the fluorine contents of particles modified by two FP were 19.3% and 37.4% respectively. The contact angles of deionized water were 103.5° and 117° respectively, and those of aviation kerosene were 68° and 120.5° respectively. They possessed outstanding hydrophobicity, but particles modified by FP2 had better oleophobicity. Finally, the particles covered the surface of fuel, which prevented the fuel from evaporating. Combined with the effect of interrupting the combustion chain reaction, the flame was gradually extinguished.
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LIQUID CRYSTALS
·
2020
·
IF 2.908
Li Zhang,Yawen Liu,Zhiqing Shi,Taoyu He,Xinjian Gong,Pengfei Geng,Zhenwei Gao,Yinghan Wang
Polymer-dispersed liquid crystal (PDLC) films containing a series of monomers with different alkyl chain lengths were prepared by nucleophile-initiated thiol-ene click reaction. The effect of alkyl chain length of monomers, dye and temperature on electro-optical properties of PDLC films was investigated. It was found that the alkyl chain length and polymerisation rate of monomers together determine the size of liquid crystal (LC) droplets, thus affecting the electro-optical properties of PDLC. In addition, the type and content of dyes could be optimised to obtain PDLC materials with better comprehensive properties for display.
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NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 23
·9903-9911
·
IF 3.288
Xueqin Zhang,Ruqing Zhang,Shu Wu,Ying Sun,Hong Yang,Baoping Lin
An ideal hydrogel for biomedical engineering or flexible devices should have excellent properties, especially high stretchability, strength, resilience and self-healing ability to withstand cyclic loading and damage. The formation of hydrogels by physically and chemically dual-crosslinked structures is a powerful method to improve the strength and resilience. Here, we have designed a physically and chemically dual-crosslinked (PCDC) hydrogel with sodium dodecyl sulfate-stearyl methacrylate (SDS-C18) micelles as physical crosslinkers, amphiphilic polyether modified polysiloxane terminated by isocyanoethyl methacrylate (SiPU) nanoparticles as chemical crosslinkers, and acrylamide (AM) as the monomer. The prepared PCDC hydrogels have a tensile strength of more than 130 kPa and a tensile elongation at break value of over 710%, and can quickly recover their original state in cyclic tensile and cyclic compression tests, exhibiting excellent stretchability, strength and resilience. Based on the hydrophobic interaction mechanism, remarkable self-healing properties of the hydrogels were achieved, allowing re-adhesion of cut surfaces without any external stimulus.
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PETROLEUM SCIENCE AND TECHNOLOGY
·
2021
·
IF 1.268
Zihao Huang,Xin Pu,Jiawen Hu,Jin Gu,Jichang Liu
A series of poly (n-alkyl acrylate-maleic anhydride) with different molecular weights were prepared as pour point depressants (PPDs) for JENM waxy crude oil obtained from the China-Myanmar crude oil pipeline. The crystallization temperature, wax morphology, and rheological behavior of crude oil were analyzed by differential scanning calorimetry, polarizing microscope, and rotary rheometer, respectively. The results indicate that the molecular weight significantly affects the performance of the pour point depressant. When the weight-average molecular weight (Mw) of copolymers were ranging from 60,000 to 70,000, it has a better pour point depression effect for JENM crude oil. The added copolymer (MW = 68,300) has achieved optimal performance which decreased the pour point of crude oil from 30 to 19 °C and crystallization temperature from 39.5 to 36.1 °C with the smallest wax crystal size and the 96.7% reduction viscosity.
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Nanoscale
·
2013
·Vol. 5
·期 24
·12409-12424
·
IF 6.233
Haiyan Chen,Bowen Li,Jiadan Qiu,Jiangyu Li,Jing Jin,Shuhang Dai,Yuxiang Ma,Yueqing Gu
Two kinds of thermally responsive polymers P(FAA-NIPA-co-AAm-co-ODA) and P(FPA-NIPA-co-AAm-co-ODA) containing folate, isopropyl acrylamide and octadecyl acrylate were fabricated through free radical random copolymerization for targeted drug delivery. Then the micelles formed in aqueous solution by self-assembly and were characterized in terms of particle size, lower critical solution temperature (LCST) and a variety of optical spectra. MTT assays demonstrated the low cytotoxicity of the control micelle and drug-loaded micelle on A549 cells and Bel 7402 cells. Then fluorescein and cypate were used as model drugs to optimize the constituents of micelles for drug entrapment efficiency and investigate the release kinetics of micelles in vitro. The FA and thermal co-mediated tumor-targeting efficiency of the two kinds of micelles were verified and compared in detail at cell level and animal level, respectively. These results indicated that the dual-targeting micelles are promising drug delivery systems for tumor-targeting therapy.
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高影响因子
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