INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Xujie Yang,Xinru Wang,Xing Wang,Xinke Li,Hanwen Xin,Jinghui Zhou,Dayin Sun
Lignin, a natural polyphenol polymer, is a biocompatible, cost-effective and accessible material. To fully utilize the benefits of lignin, it is crucial to transform its complex macromolecules into nanoscale particles in a single solvent. In this research, an assembly-mediated internal cross-linking method in single solvent was proposed to manufacture cross-linked lignin colloidal particles with nanoscale particle size controlled to be around 50 nm. Then, cross-linked lignin composite particles with a unique “patchy” structure for dental cleansing were obtained by rapidly grafting the cross-linked lignin colloidal particles onto the surface of silica microspheres through the bridging effect of silane coupling agent. The resulting composite particles have rivets with adjustable hardness, significantly lower than traditional abrasives like silica in both hardness and modulus. Through the group cleansing behavior of soft interlocking, a breakthrough has been achieved in the high solid content agglomeration friction mode of traditional abrasives, which effectively reduces tooth wear and exhibits an excellent plaque removal effect.
研究领域:
材料科学
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口腔医学
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生物材料
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产品关联
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
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2024
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IF 7.2
Tiantian Wang,Shenghua Xue,Baoluo He,Shujuan Liu,Qian Ye,Feng Zhou,Weimin Liu
Supramolecular oleogel is a promising lubricant, showing satisfactory lubrication performance and excellent stability. In this work, a series of gallium-based liquid metal (GLM)-based nano-oleogels were prepared by combining alkylthiol self-assembled GLM nanodroplets (C12@GLM) and α-lipoic acid ester-based dynamic covalently linked supramolecular gels. The dynamic disulfide bonds not only facilitate the formation of dense gel networks but also hinder the sedimentation of nanoparticles by forming coordinate bonds with C12@GLM, thereby conferring great dispersion stability (more than 2 months). The superior friction and wear reduction of nano-oleogels GLM@G-0.5 was observed, with the coefficient of friction decreased to 0.108 from 0.216, wear volume loss reduced by 73.04%, and the load carrying capacity increased from 50 to 550 N, compared with base oil. In conjunction with the shear thinning and creep recovery of the rheological properties of the nano-oleogels, the friction mechanism studies revealed that the gel networks of the nano-oleogels are disrupted under shear, releasing the base oil and nanoparticles. The formation of the lubricating film is assisted by the synergistic action of the nanoadditives and the gel lubricants, and the tribochemical reaction film consisting of iron oxides and iron sulfides, along with GLM nanodroplets.
研究领域:
材料科学
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润滑工程
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化学
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2023
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IF 8.4
Junhai Wang,Yu Kan,Tingting Yan,Wenfeng Liang,Lixiu Zhang,Xinran Li,Siyang Gao
Progress in nanolubricant additive is crucial to pursuit of energy saving and sustainable development. For enhancing lubrication efficiency of pentaerythritol ester (PETE) oil, we synthesized zero-dimensional/two-dimensional (0D/2D) carbon dots(CD)@Ti3C2Tx-MXene hybrid composites using a facial hydrothermal method, which gave full play to interlayer shear mechanism of Ti3C2Tx-MXene, repair effect of carbon dots and their potential synergy. The composites were added to PETE as lubricating additives, during which ultrasonic treatment was employed to enhance the dispersion stability. The frictional tests confirmed that the addition of CD@Ti3C2Tx resulted in significant reductions in friction and wear across varying temperatures owing to the ultrasmall size, interlayer sliding, and synergistic effect. The optimal concentration of 0.1 wt % of CD@Ti3C2Tx reduced friction coefficients and wear volumes of PETE by 54.5% and 57.6% at 25 °C, 53.3% and 54.3% at 100 °C, and 40.0% and 45.9% at 200 °C, respectively. A tribofilm induced by complex tribochemical reactions, mainly consisting of carbon dots, Ti3C2Tx, metal oxides, carbides, and nitrides, was generated at the contact interface, which significantly alleviated direct contact between the rubbing pair. This study explores the potential of CD@Ti3C2Tx for development of advanced lubricating materials and is expected to contribute to wider adoption of MXene-based materials in the field of tribology.
研究领域:
材料科学
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纳米技术
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摩擦学
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机械工程
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产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
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2024
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IF 6.1
Qian Ye,Xin Chen,Xiaozhi Zhang,Xinnan Wang,Yuhong Cui,Shujuan Liu,Feng Zhou
Herein, the anti-corrosive polymer brush functionalized MXene (P-MBTS 2 MA@MXene) was successfully prepared via surface-initiated polymerization. First, the dopamine initiator (DA-Br) can self-assemble onto MXene nanosheets formation of initiator modified MXene (PDA-Br@MXene) via spontaneous oxidative polymerization, then the corrosion inhibitor MBT derivative MBTS 2 MA monomer was grafted onto MXene nanosheets through surface-initiated atom transfer radical polymerization (SI-ATRP) to obtain polymer brush P-MBTS 2 MA functionalized MXene (P-MBTS 2 MA@MXene). The prepared P-MBTS 2 MA@MXene served as lubricant additive, manifesting good tribological properties with a low COF of 0.098 % and 94.8 % wear-reduction, which is attributed to the shielding effect and protective film formed by P-MBTS 2 MA@MXene. Additionally, the grafting P-MBTS 2 MA endows MXene nanosheets with improved anti-corrosion property, which prevents further corrosion of the metal surface via releasing corrosion resistance molecule MBT.
研究领域:
材料科学
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化学工程
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纳米技术
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
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