ACS Applied Polymer Materials
·
2025
·
IF 4.7
Jianglu Teng,Xibin Shen,Guohua Hang,Yuan Gao,Jiawei Hu,Sixun Zheng
The reaction of 4-(hydroxymethyl)phenylboronic acid with triethanolamine was carried out to synthesize a boronic ester diol featuring boron–nitrogen (B–N) coordination. This diol served as a chain extender, allowing B–N-coordinated boronic ester bonds to be introduced into polyurethane (PU) networks. Toward this end, we first synthesized a series of α,ω-dihydroxyl polyurethane telechelics with α,ω-dihydroxypropyl poly(dimethylsiloxane) as the polymeric diol. By varying the molar ratio of the boronic ester diol to 1,4-butane diol, the α,ω-dihydroxyl polyurethane telechelics were synthesized with variable contents of the dynamic covalent bonds. Thereafter, the reaction of α,ω-dihydroxyl PU telechelics with 3-isocyanatopropyl triethoxysilane was carried out to gain α,ω-ditriethoxysiloxane PU telechelics. The latter were readily cross-linked via the sol–gel process to afford the mechanically robust PU networks, with Young’s modulus and tensile strength as high as 302.7 and 35.4 MPa, respectively. More importantly, the reprocessing properties were imparted to the PU networks. Compared to the control PU network, the reprocessing temperature was depressed to 120 °C. In the meantime, the shape memory properties of PU networks were significantly improved through the introduction of dynamic covalent bonds. Furthermore, the shape memory networks featured reconfigurability with the introduction of B–N-coordinated boronic ester bonds.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Tongtong Pan,Gan Li,Rujie Li,Xiangmei Cui,Weidong Zhang
The remediation of environmental boron contamination has received extensive research attention. The adsorbent ECH@NGM aerogel with high hydrophilic and mechanical properties was synthesized to remove boron. The ECH@NGM aerogel had a high adsorption capacity of 81.11 mg/g, which was 14.50% higher than that of commercial boron-selective resin Amberlite IRA743. The Freundlich model and pseudo-second-order model described the adsorption behavior well. In addition, the response surface methodology (RSM) could predict the experimental outcomes and optimize the reaction conditions, and X-ray photoelectron spectroscopy (XPS) and control tests were utilized to investigate probable adsorption mechanisms. These data showed that the B ← N coordination bond was the primary adsorption force. The adsorbent had good resistance to interference from coexisting salts, high reusability, good adsorption performance even after five reuse cycles, and a high desorption rate in a relatively short time. The adsorption performance in real brines could be maintained at 80%. Therefore, this work not only provided ECH@NGM aerogels for the removal of boron from brine but also elucidated the main adsorption processes between N-containing adsorbents and boron, facilitating the design of future adsorbents for boron removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2018
·Vol. 42
·期 4
·878-887
·
IF 2.415
Jiangyi Wu,Meng Mei,Xiaojia Huang
To enrich carbamate pesticides from complex matrices, an adsorbent based on poly (vinylboronic anhydride pyridine complex- co -ethylenedimethacrylate) monolith was fabricated and utilized as the extraction phase of multiple monolithic fiber solid-phase microextraction. Due to the abundant boron atoms in the monolith, the B–N coordination interaction between adsorbent and analytes play a key role in the efficient extraction of analytes. Under the optimized conditions, the monolithic fibers were combined with high-performance liquid chromatography for the quantify trace levels of carbamate pesticides in environmental water and orange juice samples. For water sample, the limit of detection and limit of quantification were in the range of 0.017–0.29 and 0.057–0.96 μg/L, respectively. The related values in orange juice samples were 0.038–0.39 and 0.12–1.36 μg/kg, respectively. Besides, the proposed method also exhibits wide linearity, satisfactory coefficients of determination, and good precision. The introduced approach was successfully applied to determine trace target analytes in real-life samples. The spiked recoveries with different fortified concentrations were in the range of 80.4–117% for water samples and 83.7–119% for fruit juice samples. The relative standard deviations were below 10%. The results evidence that the suggested method was convenient, reliable, and eco-friendly for the monitoring of trace levels of carbamate pesticides in complex samples such as waters and juices.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Boyu Wang,Yani Huo,Cheng Chen,Xiao-Ye Wang,Chuancheng Jia,Jinying Wang,Xuefeng Guo
Achieving dynamic control over stereostructures and electronic properties of rigid molecules remains a significant challenge due to the delicate balance between stability and flexibility. Here, the construction of butterfly-shaped molecular junctions stabilized by moderate-strength boron-nitrogen (B←N) coordination between boraacenes and pyridines is reported. By leveraging the pivot-like flexibility of B←N bonds, molecular conductance switching with on/off ratios exceeding 100 is achieved through force-driven dynamic transitions between distinct stacking conformations. Single-molecule electrical measurements combined with first-principle calculations identify distinct charge transport mechanisms—through-space and through-bond—associated with the butterfly-wing open and closed configurations. Furthermore, external factors like electric fields and substituent effects modulate π – π interactions and charge transport properties. The introduction of destructive quantum interference effects can be achieved by replacing molecular units. The findings demonstrate that B←N coordination serves as a dynamically tunable linkage, offering a pathway to design molecular platforms with multifunctional units, customized stereo-conformations, and quantum effects.
研究领域:
物理化学
·
分子电子学
·
超分子化学
·
纳米科技
·
材料科学
·
理论计算化学
·
有机功能材料
·
化学生物学
✓ 已验证
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Xuebin Lian,Yuanjian Li,Minghui Li,Yongxin Bai,Xinyu Zhao,Jiangwen Li,Shujun Zhao
Achieving simultaneous exceptional adhesion and recyclability remains a formidable challenge due to the inherent strength-toughness trade-off and stability-switchability conflict in adhesive systems. Inspired by the hierarchical architecture of cartilage, we report a bioinspired cross-linked network integrating B-N coordination bonds and dynamic boronic ester linkages for high-performance recyclable adhesives. The biomimetic design replicates the structural organization of cartilage's collagen-proteoglycan matrix, where dynamic B-N coordination bonds between network junctions facilitate energy dissipation through bond dissociation-induced network elongation. The network is constructed via 3-amino-1,2-propanediol-mediated epoxy ring-opening and subsequent cross-linking with 1,4-phenylenediboronic acid, forming a dynamic covalent polymer network, denoted as BEAD (boronic ester adhesive), with high cross-linking density. BEAD exhibits exceptional mechanical properties (46.42 ± 5.32 MPa tensile strength, 2.60 ± 0.31 MJ/m³ toughness) and robust adhesion (26.69 ± 0.74 MPa lap shear strength on steel). The synergy of B-N coordination (enhancing cohesion) and boronic ester exchange (enabling reprocessability) yields an optimal balance of strength and recyclability, retaining 80.7% adhesion performance after five reprocessing cycles. The study presents a biomimetic dynamic bonding strategy to overcome the strength-recyclability trade-off in adhesives, establishing a sustainable paradigm for structural materials.
研究领域:
高分子材料科学
·
生物仿生工程
·
粘附力学
·
可持续材料
·
功能高分子
·
界面化学
·
结构胶黏剂
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Yubing Fu,Song Chen,Xinyu Chen,Haixun Zheng,Xueling Yan,Zelin Liu,Mengtao Wang,Lan Liu
Sustainable adhesives with simultaneous high strength and excellent ductility are important but still challenging. Here, an epoxy adhesive with simultaneously strong, tough, and sustainable features by designing a new hierarchical energy-dissipated cross-linking structure is reported: an annular structure containing quadruple internal B─N coordination boronic esters (AQBN). Under small strain, the AQBN structure is rigid to enhance the tensile strength of the adhesive. With medium strain applied, its non-coplanar ring and internal quadruple B─N coordination can orderly open, providing mechanical energy dissipation and excellent ductility. Therefore, this multilevel structure can endow epoxy adhesives with both high strength and toughness. Besides, the rapid dynamic exchange and internal B─N coordination in boronic esters enable the adhesives to have good sustainability and environmental tolerance, respectively. As a result, the epoxy adhesives exhibit simultaneous high adhesive strength (18.5 MPa), outstanding toughness (work of debonding of 29692 N m −1 ), good chemical/physical recyclability, and excellent environmental reliability (humidity, water, high/ultralow temperature, and organic solvents). This work provides a new strategy for balancing the strength, toughness, and sustainability of adhesives.
研究领域:
材料科学
·
胶粘技术
·
聚合物化学
·
可持续性
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Riting Huang,Furui He,Shujuan Yang,Keyang Mai,Shuntian Huang,Haifang Liu,Yuhong Feng,Gaobo Yu,Jiacheng Li
High quantum yield polysaccharide-based materials are significative for the dynamic anti-counterfeiting, while that are limited by weak fluorescence. However, natural polysaccharides with weak fluorescence are not suitable for anti-counterfeiting. Herein, alginate derivatives (SA-PBA) exhibiting aggregation-induced emission with high-quantum yields were synthesized by grafting phenylboronic acid (PBA) onto a sodium alginate (SA) chain. As the concentration increases, polymer assembly can be induced to form more compact soft colloidal aggregates, which enhances the fluorescence properties of alginate derivatives by introducing B ← N coordination bonds in the hydrophobic microregions. Interestingly, the clustered aggregates of SA-PBA can be dynamically controlled by pH, realizing the reversible adjustment of fluorescence. The corresponding mechanism is revealed by the combination of coarse-grained simulations and experiments. It is found that SA-PBA uses a hydrophobic driving force and hydrogen bond interaction to self-assemble in an aqueous solution and promote fluorescence emission. Moreover, the fluorescence quantum yield of SA-PBA can reach 14.4 % and can be reversibly altered by tuning soft colloidal microstructures. Therefore, a reversible information encryption system of SA-PBA is developed for anti-counterfeiting. This work shed some light on how to design novel anti-counterfeit materials based on natural polysaccharides and optimize the dynamic fluorescence conditions.
研究领域:
材料科学
·
化学
·
纳米技术
·
防伪技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Jin-Ye Lang,Yuan-Shuo Yang,Neng Wan,Chao Peng,Xian-Hua Wang,Lin-Yi Dong
Larger mesopores can effectively reduce the diffusion resistance of target molecules in microspheres. Therefore, the photoinitiated suspension polymerization was used to fabricate a novel mesoporous polymer microsphere (MPM), in which large macropores resulted from the synergy of fumed silica nanoparticle as solid porogen and toluene as auxiliary porogen. The spherical MPM had 35.9 nm of larger mesopores and was suitable for solid phase extraction (SPE) adsorbent. To improve the selectivity and adsorption capacity, the MPM was first grafted with polyethyleneimine as amplifier, and further modified with boronic acid moieties. The successful synthesis of the boronate-modified MPM (BMPM) was confirmed by detailed characterization. Due to the combination of B-N coordination and hydrophobic (or π-π) interaction, the resultant BMPM exhibited excellent adsorption performance for nitrogen-containing sulfonamides, which was successfully fitted with Langmuir, pseudo-first-order and pseudo-second-order kinetic models, respectively. Therefore, the BMPM as SPE adsorbent was used for enrichment and separation of sulfonamides. The BMPM-based SPE process was optimized in detail, and combined with high performance liquid chromatography (HPLC) analysis for simultaneous determination of sulfonamides from real aqueous samples. The proposed BMPM-based SPE combined with HPLC strategy showed low limit of detection ranged from 0.81 to 2.50 ng mL −1 . The recoveries of sulfonamides at three spiked levels ranged from 90.2% to 105.5%, 80.9% to 104.7% and 81.0% to 104.5% for tap, lake and river water, respectively. The intra- and inter-day relative standard deviations (n = 5) were no more than 5.0% and 6.7%, respectively. These results indicated that the BMPM was very promising adsorbent for selective capture of other nitrogen-containing substances and the MPM could be performed functionalization by various affinity units.
研究领域:
材料科学
·
分析化学
·
环境科学
·
药学
✓ 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）