POLYMER INTERNATIONAL
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2017
·Vol. 67
·期 3
·322-329
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IF 2.07
Yu Qi,Zhihuan Weng,Jinyan Wang,Shouhai Zhang,Lishuai Zong,Cheng Liu,Xigao Jian
The development of bio-based thermosetting resins with good thermal stability can potentially afford sustainable polymers as replacements for petroleum-based polymers. We report a practical route to a novel catechin-based phthalonitrile resin precursor (CA-Ph), which contains free phenolic hydroxyl groups that result in ‘self-curing’ at elevated temperatures to afford a thermostable polymer. Comparison of the performance of this CA-Ph resin with that of a conventional petroleum-based bisphenol A phthalonitrile resin (BPA-Ph; containing 5 wt% of the curing agent 4,4′-diaminodiphenylsulfone) revealed that CA-Ph exhibits a lower melting point and curing temperature. Cured CA-Ph resin retains 95% of its weight at 520 °C under a nitrogen atmosphere, which compares favorably with results obtained for BPA-Ph resin that retains 95% of its weight at a lower temperature of 484 °C. Kinetic results indicated that the curing reactions of both CA-Ph and BPA-Ph systems follow an autocatalytic mechanism. These results suggest that catechin is a useful bio-based feedstock for the preparation of self-curing and thermally stable phthalonitrile resins for advanced technological applications. © 2017 Society of Chemical Industry
研究领域:
材料科学
·
有机化学
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DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
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2013
·
IF 2.404
Bin Sun,Yi Zuo,Jidong Li,Li Wang,Kuangyun Tang,Di Huang,Jingjing Du,Peipei Luo,Yubao Li
Low monomer–polymer conversion is the key factor leading to cytotoxicity for resin-containing restorative materials. This paper provides a new root canal filling system based on self-curing injectable polyurethane which can achieve high conversion in a short time. Traced FTIR spectra show more than 90% NCO group participated in the curing reaction after 4 h, and only about 5% remained after 24 h. The calculated data also testified the curing process supports a third-order reaction, and this efficient and sufficient reaction is postulated to weaken the toxic stimulation. By culturing with L929 murine fibroblasts, the PU sealer is shown to be favorable for cell attachment and proliferation. Then physicochemical properties of the injectable PU-based sealer were evaluated according to the Standard [ISO 6876:2001 (E)] for clinical application. A series of physicochemical properties of PU sealer have been tested comparing with AH Plus and Apexit Plus. And the results present that the self-curing PU sealer could not only match the clinic requirements, but even has better properties than the other two commercial sealers. We expect the high conversion PU sealer has a tremendous potential in the field of root canal filling after further biological evaluation.
研究领域:
牙科学
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生物材料学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2020
·
IF 5.162
Kegui Zhang,Wenzhong Yang,Feng Ge,Bin Xu,Yun Chen,Xiaoshuang Yin,Ying Liu,Huanzhen Zuo
A composite coating containing konjac glucomannan (KGM) and CaCO 3 was fabricated on AA5052 alloy through a self-curing process, and its surface morphology and component were characterized by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The effect of Ca(OH) 2 content on the protective property of the composite coating for aluminum alloy in 3.5 wt% NaCl solution was evaluated by electrochemical impedance spectroscopy measurements. Moreover, the inhibitory performance of the coating on the pitting corrosion of metal was examined by potentiodynamic polarization curves and atomic force microscopy (AFM). The images of scanning electron microscope show the composite coating with a thickness of 50 μm has well-defined branch-shaped structure. The FT-IR spectra confirm the successful fabrication of the polymer coating through the formation of CaCO 3 . The results of electrochemical impedance spectroscopy suggest that the resistance of the aluminum alloy sample coated with such protective layer is improved by six orders of magnitude, compared with the bare metal. After 60 d of immersion, the polarization curve data and AFM analysis show the pitting corrosion occurring on AA5052 surface is prevented due to the barrier property of coating.
研究领域:
材料科学
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电化学
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表面工程
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Junliang He,Ji Zhou,Jizhen Tian,Shuai Li,Yunfei Gao,Zhengguang Heng,Yang Chen,Huawei Zou,Mei Liang
Data-driven methods or computational techniques have opened new paradigms for the rational design of materials. The introduction of specific groups could largely enhance anti-flammable and mechanical properties for epoxy resins. In this work, two high-performance epoxy resins (mABAEP and SAAEP) containing assisted flame-retardant “genes” were designed adopting a material genome approach combined with DFT calculations and synthesized through a one-pot method. The resin can be automatically molded in the presence of a heat source without mixing with hardener, called “self-curing”, which considerably increases the density of assisted flame-retardant “genes”. The presence of such “genes” in epoxy resin could promote char layer formation and release nonflammable gases during combustion, further improving flame retardancy. On the other hand, those “genes” with strong polarity enhance intermolecular forces thus reducing the motility of chain segments. The bending test shows that SAASC (SAAEP after self-curing) has higher flexural modulus and flexural strength (5155 MPa, 125.7 MPa) compared to E51/DDM (2564 MPa, 103.7 MPa), with 101% and 21% improvement respectively. In addition, SAASC has a higher glass transition temperature (217 °C) and char yield (45.0%), as well as superior antibacterial properties, which can satisfy multifunctional applications.
研究领域:
材料科学
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化学工程
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计算化学
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DOI
高影响因子
MATERIALS & DESIGN
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2024
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IF 7.6
Rui Ruan,Behzad Shiroud Heidari,Peilin Chen,Junjie Gao,Ziming Chen,Lianzhi Chen,Euphemie Landao-Bassonga,Yongquan Wang,Lingqiang Chen,Bing Wang,Minghao Zheng
Nacre of Pinctada maxima is a natural biomineralized matrix, appeared 7 million years before hominins. In this study, we converted nacre into a self-setting particle bound with multiple calcium orthophosphates that reassemble mammals’ bone mineral matrices for induction of bone regeneration. The nacre-based calcium orthophosphates composite (NCOC) exhibited a compression strength of 10 MPa, which is superior to human trabecular bone. In vitro bioactivity tests revealed the formation of apatite with nano-porous flake-like crystals on the composite surface that mimic HA structure of a human bone matrix. NCOC demonstrated efficient attachment and proliferation of osteoblast cells, promoting osteogenic differentiation by increasing expressions of RUNX2 and OPN . In vivo studies using rabbit back fascia demonstrated that NCOC displays better bone healing and biocompatibility than conventional bone substitute apatite in critical bone defect models. The degradation of calcium carbonate crystal in vivo does not compromise structural integrity of NCOC. Overall, our data showed that NCOC produced through self-setting reactions, presents advantages such as accelerated biodegradation and osteostimulative properties, making it a promising bone substitute for effective bone regeneration.
研究领域:
生物材料学
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骨科医学
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组织工程学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Haiyan Jiang,Xinlei Ma,Lei Lei,Yuzheng Xia,Xiaonong Chen,Shuxian Shi
High internal phase emulsion (HIPE) presents an attractive approach for fabricating porous materials, however, most of which require external energy input (e.g., heat, UV) to solidify soft colloid templates into robust polymeric skeleton structures. Herein, a ketone-group-containing ambient-condition curable (ACC) copolymer was prepared in order to create a polyHIPE system based on the keto-hydrazide chemistry. Tailored design is made possible by the adaptable construction feature of ACC copolymer, and its amphiphilic properties significantly expand the selection of water-in-oil (W/O) HIPE stabilizers. By utilizing the unmodified ZnO nanoparticles as stabilizers and anti-shrinkage agents based on ionic crosslinking, and employing the ACC copolymer solution as the continuous phase, we streamlined the stabilization modification step, removed the need for purifying polyHIPE, and established a rapid, straightforward, and cost-effective polyHIPE preparation protocol. Results demonstrated that the obtained polyHIPEs exhibit ideal pore structures, with densities as low as 0.046 g/cm³ and porosities exceeding 90%, exhibiting remarkable stability, 3D printing feasibility, and the capacity for crosslinking under ambient circumstances. By using Soxhlet extraction, the gel content of polyHIPEs was found to be 65.5%, and mechanical characteristics were assessed up to 1.9 MPa. The technique’s successful 20-fold scaled-up HIPE production further confirms it as a promising and straightforward approach for large-scale, energy-saving, and environmentally friendly manufacture of self-curable HIPEs.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
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2025
·
IF 1.6
Xueqiang Shao,Changyu Fu,Yujing Zhang,Jinyi Chen,Jinbei Yang,Zhongliang Yao
A novel self-solidifying polymeric ionic liquid (P-[DMT-PS][PHSA]) was synthesized via phenolic condensation and applied as a recyclable acidic catalyst for biodiesel production. The catalyst demonstrated high acidity (4.68 mmol/g), excellent thermal stability, and effective catalytic performance, achieving 98.19% oleic acid conversion under optimized conditions. Notably, P-[DMT-PS][PHSA] is soluble during the esterification, allowing it to act as a homogeneous catalyst, and re-precipitates upon methanol evaporation for easy recovery. Even after 10 cycles, the catalyst maintained 97.0% oleic acid conversion, highlighting its stability and reusability. Additionally, P-[DMT-PS][PHSA] exhibits remarkable substrate adaptability, effectively catalyzing the esterification of a range of substrates. This study presents a simple and mild synthesis method for polymeric ionic liquids and showcases P-[DMT-PS][PHSA] as a promising alternative to conventional catalysts for biodiesel production.
研究领域:
化学工程
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催化科学
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能源科学
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DOI
高影响因子
GREEN CHEMISTRY
·
2019
·Vol. 21
·期 11
·3182-3189
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IF 9.405
Xiaocheng Lin,Xiaomei Ling,Jinyi Chen,Meichen Li,Tongwen Xu,Ting Qiu
Different from the common ionic liquids (ILs) as homogeneous catalysts, solid ionic liquids (SILs) as heterogeneous catalysts are simply fabricated herein via an efficient one-step reaction for biodiesel production. Specifically, low-cost aliphatic amines containing secondary and/or primary amine groups are selected as the starting materials followed by the reaction with 1,3-propane sultone under mild conditions to graft sulfonic acid (–SO3H) groups onto the final products. The –SO3H groups are divided into two types: the bonding –SO3H groups (zwitterion arising from the hydrogen bond between sulfonic acid groups and amine groups) make the products turn solid while the free –SO3H groups endow the products with catalytic activity. Such solid ionic liquids (SILs) present pronounced activity, excellent stability and reusability as heterogeneous catalysts in esterification of free fatty acids (FFAs), indicating great potential in biodiesel production because of their high performance and low cost.
研究领域:
化学工程
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可再生能源
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催化科学
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Dingtao Guo,Jiawei Li,Yu Shao,Lei Wang,Guiping He,Liang Wu,Dongming Qi
The use of color microsphere (CMS) is an alternative to overcome the limitation of dye-based ink-jet inks in polyester-cotton (T/C) blend fabric and achieve low energy, water consumption and pollution discharge of textile digital ink-jet printing. In this work, we reported a novel self-cured core-shell CMS ink and ink-jet printing on T/C blend fabric without pretreatment and postprocess, where the core is the copolymerization of styrene (St) and highly soluble polymerizable dye (HSPD), and the shell is fluorosilicone-modified polyacrylate. Particularly, we proposed a model molecular structure of HSPD with a chromophore-polymerizable-solubilizer group, which exhibited a high solubility in monomer of St, greatly improving the color strength of the ink-jet printed T/C blend fabrics. Besides, it can be found that, when 3 wt% the crosslinking agent of St was introduced into the core, the K/S value of printed T/C blend fabrics was higher at 1.57 than that of samples without the crosslinking agent, resulting from the more absorption of visible light by a regular arrangement of microspheres on the surface of the T/C blend fabrics as evidenced in SEM images. More importantly, the fluorosilicone-modified CMS ink printed T/C blend fabric was hydrophobic and the water contact angle (WCA) was 150.1°, providing the excellent dry/wet rubbing fastness (grades 5 and 4), washing fastness (grade 4), hand feeling and air permeability, effectively preventing contamination from cola, milk, coffee and tea. Compared with the conventional dye-based ink-jet printing process, this CMS ink-jet printing process, without the process of sizing, steaming, and washing, reduced the consumption of time, water, electric energy, and carbon dioxide (CO 2 ) emissions by 79.5 %, 99.9 %, 91.6 %, and 91.6 %, respectively. This work will provide an important model system for the modulation of CMS inks, improving the color depth and fastness, but also a guiding strategy for the development of the shorter-process low-carbon cleaner printing technology.
研究领域:
纺织工程
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材料科学
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DOI
高影响因子
Journal of Cleaner Production
·
2021
·
IF 9.297
Xiaocheng Lin,Mantian Li,Zhiwen Chen,Meichen Li,Youjie Huang,Ting Qiu
Polymeric self-solidifying ionic liquids (PSILs) were simply fabricated by the facile nucleophilic substitution reaction between polyethyleneimine (PEI) and 1,3-propanesultone (PS). Because of the presence of less-substituted amino groups in PEI chain, more than 1 equivalents of sulfonic groups (–SO 3 H) per amino group were grafted onto PEI chain. Part of –SO 3 H groups could be bonded with amino groups to form –SO 3 – …N + – zwitterions , the presence of zwitterion and the high molecular of PEI could make PSILs become solid, while the left free –SO 3 H groups played a role in the acid catalysis and therefore no additional acids were required. The final PSILs showed high catalytic activity , stability and generality as the heterogeneous catalysts for biodiesel production via the esterification of a variety of free fatty acids (FFAs), as well as the transesterification of waste cooking oil and palm oil. Moreover, the one-step fabrication process of PSILs is much simpler than the multi-step fabrication process of traditional ionic liquids, suggesting potential benefits.
研究领域:
化学工程
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能源科学
·
催化材料
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Tao Huang,Shu-Wen Zhang,Lulu Zhou,Aiyin Li,Hui Tao
Hg II contaminants tend to be soluble in the anoxic sediments, which would potentially deteriorate the traditional solidification/stabilization (S/S) process. The thiol-functionalized expanded perlite (thiol-Exp-p) was prepared and employed in the self-cementation of the alkali-activated volcanic tuff (VT) as both lightweight aggregate and adsorbent to enhance the S/S of the Hg-contaminated soil. The cementation experiments were comprehensively researched in a systematical design. The experiments of adsorption, self-cementation, coupling, and stability were subsequently configured and implemented to investigate the feasibility of the coupling system and to optimize the whole S/S process. Both the pseudo-first-order kinetic model and the intraparticle diffusion model were appropriate in fitting the dynamic adsorption of Hg II to thiol-Exp-p. CaO among the three alkali components had the most significant influence on the self-cementation of VT. The factors including the curing temperatures, the grinding times of VT, and the mass ratios of fly ash (FA) to binder all affected the coupling S/S process of Hg II -spiked soil. The compressive strengths gradually decreased over the dosage of soil samples ranging from 10% to 70% in the solidified blocks in the stability experiments with the leaching concentrations contrarily elevating in the range. The addition of thiol-Exp-p to the self-cementation of VT not only reinforced the stabilization of Hg II species in the solidified sample but also positively influenced the solidification process.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Meng-Ying Liu,Hai-Yang Chen,Bin-Bin Wu,En-Hui Lv,Ling-Wei Che,Li-Min Chen,Li Zhao,Ji Liu,Guo-Dong Zhang,Jie-Feng Gao,Yong-Qian Shi,Long-Cheng Tang
Silicone resin, an organic-inorganic hybrid structure with an alternating Si-O-Si main chain, exhibits outstanding thermal stability, weather resistance, and electrical insulation, making it widely used in thermal protection materials, electronic packaging, and polymer-derived ceramics. However, its poor bonding performance and long curing temperature limit its potential application. Although introducing heteroatoms to form Si-O-X bonds enhances its thermal stability hardness and adhesion, existing modification methods suffer from long reaction times and require large amounts of organic solvents or halogen catalysts. In this work, we report a green and facile synthesis of borosilicone resin (BSi n R) via boric acid (BA) catalyst/modification without using halogen catalysts or organic solvents. Notably, introduction of boron element (B) significantly enhances the activity of the connected silicon methoxy groups, enabling room-temperature self-curing in humid environments by reducing curing temperature and time. When applied as a corrosion-resistant coating, BSi n R shows over 90 % visible light transmittance and 4H pencil hardness, and effectively protects tinplate from corrosion in 3.5 wt% NaCl solution. Additionally, at high temperatures, B promotes more complete and stable residual carbon structures on cured samples, effectively increasing T 5% to 402.5 °C and char yield to 84.9 %. Owing to its low viscosity, long-term storage stability (>2 months without precipitation), and excellent comprehensive properties, this facilely prepared BSi n R holds broad application prospects in aerospace, electronic packaging, and extreme-environment anti-corrosion coatings.
研究领域:
材料科学
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高分子化学
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表面工程
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腐蚀防护
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功能涂层
✓ 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）