JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Bingyan Sun,Yueyong Shang,Haodong Chen,Kiran Khadka,Yiting Pan,Menghong Hu,Youji Wang
Perfluorooctanoate (PFOA) is widely used as a surfactant and has metabolic, immunologic, developmental, and genetic toxicity on marine organisms. However, the effects of PFOA on individual defense functions in mussels in the presence of titanium dioxide nanoparticles (nano-TiO 2 ) are poorly understood. To investigate the defense strategies and regulatory mechanisms of mussels under combined stressors, the thick-shell mussels Mytilus coruscus were exposed to different PFOA concentrations (0, 2 and 200 μg/L) and nano-TiO 2 (0 and 0.1 mg /L, size: 25 nm) for 14 days. The results showed that, compared to the control group, PFOA and nano-TiO 2 significantly reduced the number of byssal threads (NBT), byssal threads length (BTL), diameter of proximal threads (DPB), diameter of middle threads (DMB), diameter of distal byssal threads (DDB), adhesive plaque area (BPA), and breaking force of byssal threads (N). Under the influence of PFOA and nano-TiO 2 , the morphological surface smoothness of the fractured byssal threads surface increased, concurrently inducing an increased surface roughness in the adhesive plaques. Additionally, under the presence of PFOA and nano-TiO 2 , the foot displayed dispersed tissue organization and damaged villi, accompanied by an increased incidence of cellular apoptosis and an upregulation of the apoptosis gene caspase-8 . Expression of the adhesion gene mfp-3 and byssal threads strength genes ( preCOL-D, preCOL-NG ) was upregulated. An interactive effect on the performance of byssal threads is observed under the combined influence of PFOA and nano-TiO 2 . Under co-exposure to PFOA and nano-TiO 2 , the performance of the byssal threads deteriorates, the foot structure is impaired, and the genes mRNA expression of byssal thread secretory proteins have compensated for the adhesion and byssal threads strength by up-regulation. Within marine ecosystems, organic and particulate contaminants exert a pronounced effect on the essential life processes of individual organisms, thereby jeopardizing their ecological niche within community assemblages and perturbing the dynamic equilibrium of the overarching ecosystem. Environmental Implication Perfluorooctanoic acid (PFOA) is prone to accumulate in marine organisms. TiO 2 nanoparticles (nano-TiO 2 ) are emerging environmental pollutants frequently found in marine environment. The effects of PFOA and nano-TiO 2 on marine mussels are not well understood, and their toxic mechanisms remain largely unknown. We investigated the impacts of PFOA and nano-TiO 2 on mussel byssus defense mechanisms. By assessing byssus performance indicators, morphological structures of the byssus, subcellular localization, and changes in byssal secretion-related genes, we revealed the combined effects and mechanisms through which these two types of pollutants may affect the functional capabilities and survival of mussels in the complex marine ecosystem.
研究领域:
海洋生物学
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环境毒理学
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分子生物学
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生态学
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产品关联
DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 34
·2201367
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IF 6.389
Wenkai Wang,Huaiyu Song,Zekang Lu,Qing Zeng,Qinghao Wang,Cheng Ma,Hongjun Jin,Jinwan Qi,Tongyue Wu,Shuitao Gao,Mingning Zhu,Dongdong Lu,Jianbin Huang,Yun Yan
Reliable human–machine interactions rely highly on a material that can provide stable real-time conductivity in the presence of unexpected damage. The closest step toward this goal is to create various self-healing materials, but the performance of the material will inevitably be interrupted during the process of healing. Herein, it is reported that damage-resistant conductivity of a skin-like polyelectrolyte film electrode can be achieved by creating hierarchical pores in analogy to those in mussel byssus. The hierarchical porous structure in mussel byssus is well-known to expel water quickly from the rock surface, but its role in recovering the ionic conductivity has been overlooked. It is shown that the ionic conductivity in the porous film remains stable as long as a small part of the film is still in contacting, owing to the fast ion transportation in the hierarchical pores. As such, the real-time conductivity does not change even if the skin-like film is cut with a knife or pieced with a needle during work. It is envisioned that the current damage-resistant ionic electrode wants to open a new vista in the design of soft conductive devices for reliable human–machine interactions.
研究领域:
材料科学
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生物仿生学
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电子皮肤
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2020
·Vol. 9
·期 2
·373-380
·
IF 5.344
Chenglong Dong,Hailong Fan,Feng Tang,Xiaobin Gao,Kai Feng,Jiahui Wang,Zhaoxia Jin
Applications in the harsh environment require hydrogels with ultra-stiffness, toughness, and stretchability. However, it remains a challenge to increase the elastic modulus without sacrificing the maximum elongation of hydrogels, because of the trade-off between stiffness and extensibility. Inspired by the crosslinking hierarchy of mussel byssus cuticle, here, we report a strategy to fabricate an ultra-stiff, tough and stretchable triple-crosslinked (TC) hydrogel. The polymer is crosslinked by chemical crosslinker at first, subsequently by introducing a polyphenolic compound, tannic acid (TA), and metal ions. The hydrogen-bond-based network between the polymer and TA works as an extensible and energy-dissipative network, mimicking the matrix of the cuticle, while the higher crosslinked domains formed by the coordinate bonds between TA and metal ions contribute to the stiffness. The triple-crosslinked hydrogel exhibits two orders of magnitude increase in stiffness (E = 58 MPa), but without sacrificing the maximum elongation (ε = 850%), compared with those of metal-free hydrogels (E = 0.18 MPa, and ε = 860%). The combination of ultra-stiffness, toughness, and stretchability in hydrogels is successfully achieved through leveraging the hierarchically cross-linked network based on hydrogen bonding and coordination bonding. Moreover, utilizing the wide distribution of bonding strength of coordination interaction, the mechanical properties of triple-crosslinked hydrogels can be manipulated by using different kinds of catechol-metal coordination.
研究领域:
材料科学
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生物仿生学
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高分子化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2021
·
IF 6.064
Jiawei Liu,Lin Li,Zhongzheng Xu,Yongpeng Sun,Yining Wu,Caili Dai
Fracture conformance control in reservoir can effectively improve water channel to increase crude oil displacement efficiency of subsequent waterflooding. Inspired by the remarkable underwater wet adhesion of mussel byssus, hydrogel particles which can adhere stably on the fracture rock surface in reservoir conditions could achieve long-lasting reservoir control effect. In this work, the size-controllable biomimetic functional hydrogel particles were prepared by mechanical shearing after bulk hydrogel was constructed by catechol-functionalized polyacrylamide and phenolic resin crosslinking agent. The influence of solution salinity on the aggregation and adhesion of hydrogel particles was investigated via scanning electron microscope (SEM), colloidal probe atomic force microscope (AFM) and quartz crystal microbalance with dissipation (QCM-D). The results showed that hydrogel particles maintained well-dispersed state in low-salinity water, while exhibited significant adhesion and adsorption capacity to the silica surface in simulated reservoir salinity water. This is of great importance to the practical applications that the hydrogel particles would not show enhanced adhesion to rock surfaces until the reservoir salinity water was met, which was beneficial to the in-depth migration of hydrogel particles to achieve effective deep reservoir profile control. Furthermore, the visible micro-model was designed and applied to evaluate profile control effect of hydrogel particles, and the results showed that hydrogel particles could withstand water flushing and adhere stably to the fracture surface. The waterflooding sweep efficiency was increased remarkably from 20.3% ± 2.0% to 38.8% ± 2.0%. This work would help better understand the function mechanism of hydrogel particles in reservoir control and provide novel and efficient method for the practical application in enhanced oil recovery.
研究领域:
材料科学
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石油工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
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