Polymers
·
2024
·Vol. 16
·期 10
·1318
·
IF 4.7
Mengjuan Liu,Hui Wang,Wei Fang,Tao Lu,Jinsen Wang,Guozhang Wu
This study aims to investigate the effects of different hydroxy-terminated silicones on the properties of polycarbonate-silicone copolymers (ICS-PC) by introducing flexible and hydrophobic silicone into isosorbide-based polycarbonate through melt transesterification- polycondensation method. Through compatibility and transesterification experiments, it is confirmed that the alcohol-hydroxyl polydimethylsiloxane (a-PDMS) has higher reactivity and silicone conversion than the phenol-hydroxyl polydimethylsiloxane (p-PDMS), but the conversion does not exceed 81%. Polyether-modified silicone (PEMS) exhibits better compatibility and higher reactivity, thus resulting in higher conversion that can reach 86%. Effects of the type and content of silicone on the glass transition temperature (Tg), optical transparency, saturated water absorption, and mechanical strength of ICS-PCs were also discussed. It is found thatp-PDMS has higherTg, hydrophobicity, and mechanical strength with similar silicone content, but the total transmittance does not exceed 60%. In contrast, the PEMS system exhibits better optical transparency due to its improved compatibility with the PC matrix, with a total transmittance of up to 73%,Tgexceeding 150 °C while maintaining excellent flexibility and hydrophobicity. These results are helpful to further improve the comprehensive properties of bio-based polycarbonates.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
PubMed
高影响因子
POLYMER
·
2013
·
IF 3.379
Zhaofeng Wu,Hua Wang,Xingyou Tian,Meng Xue,Xin Ding,Xianzhu Ye,Zhongyue Cui
The surface and mechanical properties of hybrid films of waterborne polyurethane (WPU) and fluorinated polymethacrylate (FPMA), and high-hydrophobic silica (SiO 2 ) contained hybrid films of FPMA/WPU were investigated. X-ray photoelectron spectroscopy confirmed that the surfaces of hybrid films exhibited notable fluorine enrichment. Scanning electron microscopy observation demonstrated that micro-scale rough structures consisted of sub-micro papillae and micro-scale wrinkles formed on the surfaces of FPMA/WPU. This was attributed to the enhanced phase separation of WPU and the incompatibility of low-surface-energy FPMA and WPU. Colloidal SiO 2 was modified by polydimethylsiloxane and the modified SiO 2 was reactive and high-hydrophobic. After the addition of reactive SiO 2 , the rough structures became micro-scale striped wrinkles studded with nano- and sub-micro papillae formed by the high-hydrophobic SiO 2 . The combination of the fluorine enrichment and the rough structures accounted for the high hydrophobic FPMA/WPU film and superhydrophobic SiO 2 /FPMA/WPU film.
研究领域:
材料科学
·
表面化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Yiqun Song,Ting Xu,Hongchang Zhang,Shuangqing Hu,Sheng Wei,Miao Cao,Huan Wang,Daqiang Yin
Vision is the primary sensory function for most animals and is also a sensitive toxic target of environmental pollutants. A new class of organophosphate flame retardants (OPFRs) termed emerging OPFRs (eOPFRs) with limited toxicological information is rapidly developed into the substitutes of traditional OPFRs. In this study, we investigated the visual toxicity of triphenyl phosphate (TPHP, one traditional OPFR) and cresyl diphenyl phosphate (CDP, one emerging OPFR) on zebrafish larvae at environmentally relevant concentrations (3 and 30 nM). After 5 days of exposure, an opposite toxicity was found between the two OPFRs, manifested in the light perception and the gene expressions of visual opsins. CDP caused a weak reaction to light and overall inhibition of opsin expression (0.7- to 0.8-fold) in the larvae, while TPHP tended to stimulate these events (1.2- to 2.4-fold). Besides, we identified a key transcription factor, tbx2a, that was significantly disrupted in both OPFRs’ exposure. The differing ways in which both OPFRs bind to Tbx2a may be the reason behind their opposite effects. These findings provided new clues for the toxicological mechanisms of OPFRs and revisited the question regarding safe substitutes for those emerging contaminants.
研究领域:
环境毒理学
·
发育生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 4
·2198-2208
·
IF 3.119
Hui Su,Jiaxin Lv,Liansheng Yang,Li Feng,Yongze Liu,Ziwen Du,Liqiu Zhang
The pollution of aromatic organophosphorus flame retardants (aromatic OPFRs) in aquatic environments has drawn great attention over the last few years. Two MIL-101-based metal–organic frameworks (Cr-MIL-101 and Fe-MIL-101-NH2) which possess ordered mesoporous cavities (2.9 and 3.4 nm) and aromatic structures were chosen and prepared to selectively adsorb a typical aromatic OPFR [triphenyl phosphate (TPhP)] from aqueous solution. Pore distribution analysis showed that Cr-MIL-101 and Fe-MIL-101-NH2 had both a mesoporous structure (2–3.5 nm) and microporous structure (1–2 nm), conducive to diffusion and adsorption of TPhP molecules. Compared with Fe-MIL-101-NH2 as well as commercial activated carbon, Cr-MIL-101 showed rapid and efficient adsorption for TPhP, and its initial sorption velocity (v0) calculated from the pseudo-second-order model was up to 568.18 μmol g−1 h−1. The adsorption equilibrium of TPhP on the Cr-MIL-101 was almost achieved within 12 h, while the equilibrium time of other adsorbents required more than 48 h. The study of selective adsorption found that Cr-MIL-101 had a higher sorption amount for aromatic OPFRs than alkyl-OPFRs and other aromatic compounds with different chemical structures. Cr-MIL-101 was able to keep a steady selective adsorption for TPhP in the presence of co-existing aromatic compounds. Based on the analysis of Kow, molecular structure and further density functional theory calculations, hydrophobic interactions may play a dominant role in the selective adsorption process of TPhP, and π–π interactions may be also involved. Cr-MIL-101 exhibits reusability and promising potential to rapidly and selectively remove aromatic OPFR in environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Coatings Technology and Research
·
2019
·Vol. 17
·期 2
·345-359
·
IF 1.584
Peng Zhongkang,Tang Liuyan,Yuan Ye,Qu Jinqing
Abstract A series of N -alkylated aminosulfonic acids (NASAs) were synthesized with 1,4-butane sultone and primary amines and then reacted with hexamethylene diisocyanate trimer to obtain water-dispersible polyisocyanates (WDPs). Two-component waterborne polyurethane (2K-WPU) coatings were finally prepared by the reaction of WDPs and aqueous hydroxyl resins. The structures and properties of WDPs and 2K-WPU coatings were characterized. The effects of the categories and amounts of NASAs on the properties of WDPs and 2K-WPU coatings, including viscosities, water resistance and transparency, were investigated. The results showed that the average molecular weights and viscosities of the WDPs increased with the increase in the amounts and molecular weights of NASAs. 3-(Cyclohexylamino)-1-propanesulfonic acid possesses a high molecular weight, resulting in low-concentration –SO 3 per mass, so a high concentration up to 3.5 wt% was needed to meet water-dispersible requirements. On the other hand, 3-isobutylamino-1-propanesulfonic acid (IBAPS) has high-concentration –SO 3 per mass and only a low concentration (2.5 wt%) was required to offer satisfactory water dispersibility. 2K-WPU film cured by IBAPS-WDP displayed high gloss, good transparency and excellent water resistance owing to suitable steric hindrance and high content of –SO 3 H per mass. Graphic abstract
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2013
·Vol. 291
·期 9
·2155-2162
·
IF 2.161
Zhou Xi,Hong Liangzhi
( R )-(−)-1,1′-Binaphthyl-2,2′-diyl hydrogen phosphate (BPA) has been demonstrated as an efficient organocatalyst for controlled ring-opening homopolymerization of ε-caprolactone (ε-CL) and copolymerization of ε-CL with glycolide and lactide. High molar mass PCL with narrow molar mass distribution has also been synthesized from the bulk ring-opening polymerization (ROP) of ε-CL with BPA as catalysts; the highest molar mass of PCL is 4.35 × 10 4 g/mol with polydispersity index of 1.20. The successful synthesis of high molar mass PCL is attributed to the bifunctional activation mechanism for the ROP of ε-CL catalyzed by BPA. More interestingly, ppm level of BPA is sufficient to catalyze controlled ROP of ε-CL.
研究领域:
高分子化学
·
生物材料
·
有机催化
·
可控聚合
·
可降解材料
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 136
·期 11
·47186
·
IF 1.901
Liyuan Sun,Yajie Zhang,Jinggang Wang,Fei Liu,Zhen Jia,Xiaoqing Liu,Jin Zhu
2,5-furandicarboxylic acid (FDCA), a bio-based monomer, was taken as a sustainable alternative to isophthalic acid (IPA) for the modification of poly(ethylene terephthalate) (PET). Results showed that FDCA was more effective than IPA in terms of reducing the crystallization activity of PET, because FDCA is more rigid and highly polar, which will hinder the PET chain packing during crystallization process. Moreover, modification of PET with FDCA resulted in copolyester with higher glass transition temperature, higher tensile modulus, better optical clarity, and gas barrier property, compared to those of IPA. With the addition of 20 mol % FDCA, the resulted copolyester poly(ethylene 2,5-furandicarboxylate- co -ethylene terephthalate) (PEFT 20) was able to keep high transparency even after being annealed at 110 °C for 40 min. However, when 20 mol % of IPA was added, poly(ethylene isophthalate- co -ethylene terephthalate) (PEIT20) easily turned opaque under the same heat treatment. Therefore, less amount of FDCA was required in order to obtain the PET copolyester with better performance. The result indicated that FDCA had great potential to substitute IPA for the modification of PET from the point of view of industrial application. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47186.
研究领域:
材料科学
·
可持续化学
·
高分子化学
✓ 已验证
DOI
高影响因子
Coatings
·
2017
·Vol. 7
·期 8
·117
·
IF 2.175
Wenjing Xia,Nianqing Zhu,Rongjie Hou,Wengui Zhong,Mingqing Chen
The polyurethane prepolymer terminated with a double bond was synthesized using isophorone diisocyanate (IPDI), hydroxyl terminated polybutadiene (HTPB), 1,4-butanediol (BDO), and 2-hydroxyethyl acrylate (HEA). Then, a series of innovative UV-curable polyurethane coatings were prepared by blending ene-terminated polyurethane, fluoroacrylate monomer, and multifunctional thiol crosslinker upon UV exposure. The incorporation of fluoroacrylate monomer and multifunctional thiols into polyurethane coatings significantly enhanced the hydrophobic property, mechanical property, pencil hardness, and glossiness of the polyurethane coatings. This method of preparing UV crosslinkable, hydrophobic polyurethane coatings based on thiol-ene chemistry exhibited numerous advantages over other UV photocuring systems.Keywords:polyurethane;fluorine-containing;UV-crosslinkable
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
SpringerPlus
·
2015
·Vol. 4
·期 1
·1-11
·
IF 0
Lou Shengfeng,Jia Lihua,Guo Xiangfeng,Wu Ping,Gao Lianbing,Wang Jianjun
Diethylene glycol monomethyl ether monolaurate (DGMEML) was synthesized via the reaction of diethylene glycol monomethyl ether (DGME) with methyl laurate (ML) by a new solid base catalyst of KF/CaO/AC, which was prepared by impregnation method using active carbon as carrier. The catalysts were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), nitrogen physisorption-desorption and Hammett indicator methods; the effect of the mole ratio of KF to CaO, DGME to ML molar ratio, amount of catalyst, reaction time and temperature on the yield of DGMEML were studied; and the relationship between the structure of the catalyst and the yield of DGMEML was investigated. The formed KCaF3 and K2O were acting as the main active components in the catalytic transesterification; the highest yield of 96.3 % was obtained as KF-to-CaO molar ratio of 2.0, DGME to ML molar ratio of 4.0, catalyst amount of 5 wt%, and reaction time of 30 min at 75 °C; and the catalyst displayed good stability in the transesterification.
研究领域:
化学工程
·
催化材料
✓ 已验证
DOI
PubMed
Protection of Metals and Physical Chemistry of Surfaces
·
2020
·Vol. 56
·期 4
·740-745
·
IF 0.985
Lijun Chen,Chen Xiaolong,Gong Yilu,Shao Tantan,Zhang Xin,Chen Dawei,Cai Zhibin
Abstract Polyacrylate latex contained monobutyl itaconate (MBI) and N,N-diethylacrylamide (DEA) was successfully prepared by semi-continuous seeded emulsion polymerization with a green mixed emulsifier of sodium dodecyl benzene sulfonate (SDBS) anion surfactant and tetradecyl hydroxypropyl decyl betaine (THDB) amphoteric emulsifier, the mixed monomers of methyl methacrylate (MMA), butyl acrylate (BA) were modified by MBI and DEA, which were initiated with potassium persulfate (KPS). The structure was characterized by Fourier transform infrared spectroscopy (FTIR). The film of latex was measured by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and contact angle (CA). The particle size of the latex was tested by Zetatrac dynamic light scattering detector. The optimal conditions are as follows: the amount of mixed emulsifiers is 6.0%; the optimum mass ratio of SDBS to THDB is 1 : 1; the amount of initiator is 0.7%; the mass rate of main monomers of MMA : BA = 1 : 1; the amount of DEA is 5.0% and MBI is 2%. In this paper, the polyarcylate emulsion shows excellent thermal stability and hydrophobicity.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Yunying Lian,Ming Li,Yuying Gao,Menglong Zhao,Jinping Liu,Liang Xiao
Poly(methyl methacrylate) (PMMA) is an ideal polymer matrix for long-term cycling of solid-state lithium–oxygen (Li–O2) batteries using gel polymer electrolytes (GPEs) due to its resistance to nucleophilic attack by the oxygen reduction reaction (ORR) intermediates. However, it is challenging to achieve dimensionally stable gel states with linear PMMA molecules when they are exposed to solvent swelling. To this end, the present work proposes a novel poly(ethylene terephthalate) (PET) fabric reinforcement approach to prepare a dimensionally stable PMMA-based GPE (PMMA@PET GPE) that exhibits a high lithium-ion conductivity of 0.71 mS cm–1 at 25 °C. Benefiting from the chemical and electrochemical stability of PMMA and PET toward lithium metal and ORR intermediates, as well as the mechanical strength and elasticity reinforced by PET fabric that effectively suppress the growth of lithium dendrite, solid-state Li–O2 batteries with PMMA@PET GPE achieve a high reversible capacity of 4.51 mAh cm–2 and 117 stable cycles. PMMA@PET GPE enables a prolonged cycle life 4 times higher than its counterparts including poly(vinylidene fluoride-co hexafluoropropylene) (PVDF-HFP)-based GPE and organic liquid electrolytes. This fabric reinforcement approach would facilitate the application of PMMA-based GPEs in solid-state lithium metal batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
RESOURCES CONSERVATION AND RECYCLING
·
2025
·
IF 10.9
Wenlong Pang,Mengyu Zhai,Huijin Hu,Zhongxun Tian,Jun Yang,Shaonan Tian,Yufeng Wu
The effective recycling of waste polyurethane foam (PUF) is essential for reducing environmental burden, preventing littering, and decreasing reliance on virgin resources. In this study, we developed a mild, solvent-assisted glycolysis strategy using polyether polyol and various small-molecule diols to achieve complete depolymerization of waste PUF. The resulting recycled polyols (RPs) exhibited excellent reactivity and compatibility, enabling direct reuse-without purification-in the synthesis of rigid polyurethane foam (RPUF) at a substitution level of up to 40 wt%. Comprehensive characterization confirmed that the mechanical and physical properties of the recycled RPUF were comparable to those of commercial products. Importantly, a cradle-to-gate life cycle assessment (LCA) was conducted, highlighting the minimal differences in environmental impacts of the process, with a focus on the limitations of the assessment, particularly in terms of global warming potential (GWP). This work provides important theoretical support for the industrialization of polyurethane waste recycling.
✓ 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）