TEXTILE RESEARCH JOURNAL
·
2023
·
IF 2.3
Yanqin Shen,Jinyu Qiao,Hailiang Wu,Yijun Yao
In this work, a series of alkylation starches (St-Cn) with different alkylation degrees was synthesized by introducing alkyl chains (the number of carbon atoms was 3, 8, and 12, respectively) onto starch. The influence of the substitution degree (DS) and length of the alkyl chains on the sizing properties of alkylation starches was studied. Fourier transform infrared spectroscopy and proton nuclear magnetic resonance spectra provided evidence for the linkage of alkyl chains onto the starch structure. Benefiting from the flexibility characteristic of the alkyl chain and the weakening hydrogen bonding to starch structure, St-C8 alkylation starch film with a DS of 0.114 exhibited a high elongation break of 4.64%, which is higher than that of the modified starches reported in most of the literature. Moreover, the alkyl chain could reduce the internal stress of the starch adhesive layer among fibers, which improved the adhesion of alkylation starch to cotton fibers. The St-C12 alkylation starch obtained by the longer alkyl chain weakened the adhesion among fibers due to the strong hydrophobic effect. This work provides a new idea to achieve starch plasticization.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Zhang Qian,Shouqing Liu,Guanben Du,Shengtao Wang,Yilin Shen,Xiaojian Zhou,Shuyang Jiang,Hui Niu,Zhigang Duan,Taohong Li
Deriving environmentally friendly and renewable polymers from epoxidized plant oils (EPOs) is one of the promising strategies for realizing the sustainable development of materials industry. Direct crosslinking EPOs without pre-modifications is a straightforward, efficient, and cost-effective way for the utilization of EPOs. Herein, a facile and green strategy that crosslinks epoxidized soybean oil with highly branched and flexible polyamine via ring-opening and amidation polymerizations successfully produced a novel resin with exceptional properties and versatile potential applications. After completely cured, the resin appeared to be super strong structural adhesive as it provided a room-temperature bonding strength of 12–24 MPa for metal and non-metal substrates, as well as a steel bonding strength of 11.6 MPa at cryogenic temperature (−196 °C), which is far superior to the previously reported oil-based adhesives. Meanwhile, the resin exhibited excellent film-forming ability. Particularly, by controlling the curing temperature, the films with tunable mechanical properties were obtained with a tensile strength of 3–40 MPa and an elongation at break of 17–230%. The features of uncured resin, including liquid viscoelasticity, good wettability, and high molecular weight, make it a qualified pressure-sensitive adhesive which demonstrated satisfied peel strength for various substrates.
研究领域:
材料科学
·
绿色化学
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高分子化学
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产品关联
DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2014
·Vol. 8
·期 3
·312-319
·
IF 0
Tan Ming,He Gaohong,Dai Yan,Wang Rujie,Shi Wenhua
The ternary phase diagrams of polyetherimide (PEI)/ N,N -dimethylacetamide (DMAc) with H 2 O and BuOH as non-solvent were simulated using solubility parameter and Flory-Huggins theory. The phase diagrams show that 5.5% H 2 O/BuOH system containing 5% BuOH and 0.5% H 2 O, or 6.5% H 2 O/BuOH system containing 6.2% BuOH and 0.3% H 2 O is required to induce liquid-liquid demixing for 20 wt-% PEI/DMAc casting solution. Therefore, BuOH can enhance the phase separation of the PEI casting solution and hereby induce higher porosity of the membrane, and the diffusion of BuOH into the water coagulation bath causes larger pore size easily compared with DMAc. Our predictions that the membrane pure water flux first increases then decreases, and the rejection ratio of bovine serum albumin decreases with the increasing concentration of BuOH were validated by the experiments using the prepared membranes.
研究领域:
材料科学
·
膜技术
·
化学工程
✓ 已验证
DOI
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Wei Li,Lanjuan Wu,Zhifeng Zhu,Zhengqiao Zhang,Qian Liu,Yuhao Lu,Huizhen Ke
The purpose of this work was to examine the influence of poly(sodium allyl sulfonate) (PSAS) branches on sizing properties of biological macromolecule (corn starch) for exploring a new anionic starch graft copolymer size (S- g -PSAS). Successful synthesis of S- g -PSAS samples was confirmed by energy dispersive X-ray spectrometer. Viscosity stability, adhesion, film properties and desizability of the samples were also investigated. Compared with HS, improved adhesion to cotton and viscose fibers, viscosity stability and desizability for S- g -PSAS as well as enhanced breaking elongation and bending endurance for S- g -PSAS film were exhibited. With the rise in grafting ratio, bonding forces to both fibers, viscosity stability and desizability of S- g -PSAS and its film properties such as breaking elongation and bending endurance, were gradually enhanced. These results indicated that S- g -PSAS showed potential for the use as a new starch-based size in the sizing of cotton and viscose warps.
研究领域:
材料科学
·
纺织工程
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Lei Chen,Zhouyi Xiong,Hanguo Xiong,Zhenjiong Wang,Zia-ud Din,Asad Nawaz,Pengkai Wang,Chun Hu
The nano-TiO 2 was utilized to improve the bonding performance, structure stability and film-forming properties of renewable starch-based wood adhesive. The results showed that 4% nano-TiO 2 (nano-TiO 2 :starch, w;w) resulted in 6.5 MPa of shear strength and 6437 Pa.s of viscosity. The thermal stability was measured by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Additionally, low-field nuclear magnetic resonance (NMR) and rheological results exhibited the enhancement of nano-TiO 2 on the pseudoplasticity and structure which determined the state and migration of water. Besides, the structural characterization of copolymer was analyzed via fourier transform infrared spectroscopy (FTIR) and X-ray diffraction analysis (XRD). Furthermore, the film-forming property was evaluated by small angle X-ray scattering (SAXS) and dynamic mechanical analysis (DMA). The morphological structures of adhesive were observed by scanning electron microscopy (SEM). In conclusion, the 4% nano-TiO 2 (nano-TiO 2 :starch, w;w) can be employed to prepare starch-based wood adhesives with superior properties for wood application.
研究领域:
材料科学
·
木材科学与技术
✓ 已验证
DOI
PubMed
高影响因子
Polymers
·
2022
·Vol. 14
·期 9
·1917
·
IF 4.967
Fue Ren,Shuyan Yang,Yang Wu,Feng Guo,Feng Zhou
An ultra-low friction and high load capacity could be obtained on the surfaces grafted by a polymer brush even at relatively slow friction speeds in aqueous lubrication environments, which has attracted widespread attention to study the lubrication mechanism of polymer brushes; however, it has yet to be fully understood. The macroscopic tribological performance of two different polymer brushes, which were prepared by the method of “grafting to” and “grafting from” and named as PLL-g-PEG and PSPMA, respectively, were investigated. The friction results demonstrated that PLL-g-PEG obtained a lower friction coefficient than polymer brush PSPMA, which was ascribed to its unique “self-healing” behavior. The lubrication film was in situ observed and the film thickness induced by the polymer brush was measured using a laboratory set for film thickness measurement apparatus based on interference technology. It was found that PSPMA exhibited excellent lubrication performance not found in PLL-g-PEG, and two film-forming mechanisms highly dependent on velocity were revealed, which may be important to interpret the lubrication mechanism of polymer brushes in aqueous lubricants.Keywords:PLL-g-PEG brushes;PSPMA brushes;friction;film formation property;hydration effect;hydrodynamic effect;lubrication mechanism
研究领域:
摩擦学
·
聚合物科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Xunhai Pan,Xiaoyan Lin,Lili Liang,Hailing Xi
Strippable film decontamination is critical for removing radioactive surface contamination during nuclear facility decommissioning and accident response. However, the conventional detergents perform poorly in film formation, freeze easily, and are hard to spray at low temperatures (below 0 °C). In this study, a novel ethyl cellulose-g-polyacrylate (EC-g-PA) detergent was successfully synthesized via benzoyl peroxide (BPO) initiated free-radical polymerization of ethyl cellulose (EC), methyl methacrylate (MMA), butyl acrylate (BA), ethyl methacrylate (EMA), and 2-ethylhexyl acrylate (2-EHA). The synthesized EC-g-PA was characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), gel permeation chromatography (GPC), and thermogravimetric analysis (TGA). The film-forming and rheological properties of EC-g-PA detergents at low temperatures were systematically investigated and the mechanical properties of the EC-g-PA film were tested. Moreover, the decontamination efficiency of the EC-g-PA detergent on various plates within the temperature range from −10 °C to 25 °C was also investigated. The results demonstrate that the EC-g-PA detergent exhibits excellent low-temperature fluidity (below 0 °C) and colloidal stability. Notably, it demonstrates rapid film formation and complete peelability within 12 h under subzero conditions. The contamination decontamination rate (CDR) exceeds 90% on ceramic tiles (CT), glass (G), stainless steel (SS), and marble (M), while achieving 78.30% on concrete (C) at 0 °C. These results demonstrate that the EC-g-PA detergent shows significant potential for application in nuclear facility decommissioning and accident response at low temperatures.
研究领域:
核工程
·
高分子科学
·
表面化学
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环境修复
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2021
·Vol. 79
·期 11
·9717-9740
·
IF 2.87
Wu Guangfeng,Song Xin,Yang Zhihui,Li Yingchun,Zhang Huixuan
Waterborne polyurethane (WPU) prepolymer with acrylate terminal was prepared by using hydroxyethyl acrylate as an end-capping agent. Modified gelatin (mGH) was prepared by grafting vinyl groups which were obtained from hydrolysis and condensation of vinyl trimethoxysilane onto the renewable natural polymer material cold-water fish skin gelatin. Due to the excellent biodegradability and mechanical properties of cold-water fish skin gelatin, mGH was introduced into the WPU backbone by covalent bonding to improve WPU comprehensive property. The vinyl groups in mGH and the acrylate ends in the WPU prepolymer were connected by UV curing to prepare biodegradable and renewable mGH/WPU chemical hybrid materials. The test results showed that the film-forming properties, the water resistance and thermal stability of WPU were improved by covalent bonding. Water contact angle increased from79.6° to 96.5°, and the maximum thermal degradation rate temperature increased from 340 to 400 °C. In addition, incorporation of mGH with high modulus improved the moduli and yield strength of WPU, in which the yield strength increased from 11.3 to 18.2 MPa. The degradation performance of mGH/WPU chemical hybrid materials was also evaluated that the degradation rate reached 68% in 0.6% lipase PBS solution and 56% in soil after 60 days. The study provides a novel polymerization method for preparing high biodegradable decorative coatings and prints of specialty metals, polymer plastics and certain types of woodware as well as medical scaffold materials. Graphical abstract
研究领域:
材料科学
·
高分子化学
·
环境科学
✓ 已验证
DOI
高影响因子
ADVANCES IN POLYMER TECHNOLOGY
·
2019
·
IF 2.663
Quan Ma,Xingzhong Zhang,Qianwen Shi,Yan Li,Bin Li,Shilin Liu
In this work, we presented a facile pathway to fabricate polyanionic cellulosic microparticles by selective oxidation with sodium periodate firstly, followed by grafting sodium bisulfite to the 2,3-dialdehyde cellulose particles. The obtained polyanionic cellulosic microparticles with the particle size of 2-4 μm had increased stability in water, and it had pH responsiveness. Moreover, the polyanionic cellulosic microparticles had excellent film-forming property, and the tensile strength of the film formed from pristine cellulose particles was about 40 MPa, and it increased to 64 MPa for the film formed from SRC-50 particles. Furthermore, the polyanionic cellulosic microparticles had certain reduction ability, and it could be used as coating to cover the surface of fruits or vegetables, and it could prevent the discoloration of the fresh-cut potato. The cellulose based particle coating with excellent antibrowning capacity, biocompatible, and environmentally friendly characteristics would be attractive for the applications in packaging material for food preservation.
研究领域:
材料科学
·
化学工程
·
食品科学
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2017
·Vol. 24
·期 4
·1-7
·
IF 1.615
Li Hu,Zhou Zhen,Liu Jingcheng,Zheng Xiangfei,Xu Wenjia,Ji Changwei,Shi Weidong,Liu Ren,Liu Xiaoya
Hexakis(4-formylphenoxy) cyclotriphosphazene (HAPCP), substitution reaction product of hexachlorotriphosphazene (HCTP) with p-hydroxybenzaldehyde, was reduced by sodium borohydride to afford hexakis[4-(hydroxymethyl) phenoxyl] cyclotriphosphazene (HHPCP). The hydroxyl group of this compound was then protected by the reaction with di-tert-butyl dicarbonate ester (DBDC) in the presence of 4-dimethylaminopyridine (DMAP) as catalyst to give t-butyloxy carbonyl (tBOC) protected HHPCP. Fourier-transform infrared spectroscopy (FT-IR) and proton nuclear magnetic resonance ( 1 H NMR) were employed to characterize the chemical structure, indicating that the synthesis was successful. Thermal behavior was characterized by thermogravimetric analysis (TGA), the results showed that the initial thermal decomposition temperature occurred at approximately 170 °C, X-ray diffraction analysis (XRD) results showed that the tBOC protected HHPCP derivatives had amorphous form, and performed excellent film-forming property. Upon irradiation to 365 nm exposure, the photoacid generated proton H + , which can catalyze the deprotection of acid labile tBOC group. This type of novel molecular glass photoresist based on hexachlorotriphosphazene showed high sensitivity, making it possible to fabricate 1 μm line and space pattern under i-line exposure.
研究领域:
材料科学
·
化学
·
半导体制造
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Zihua Yu,Shaohua Wu,Chuncheng Li,Yaonan Xiao,Jiajian Liu,Bo Zhang
The poor processability has long limited the broad application of polybenzoxazoles in microelectronics. Herein, a series of poly(benzoxazole imide) (PBOI) copolymers were designed and prepared through the polymerization of 5-amino-2-(4-aminobenzene) benzoxazole with 3,3′,4,4′-biphenyl tetracarboxylic dianhydride and 4,4′-(hexafluoro-isopropylidene)diphthalic anhydride. These PBOI copolymers show excellent film-forming properties by integrating preformed benzoxazole structures into the polyimide backbone. Moreover, the molecular and aggregate structures of PBOIs, such as chain rigidity and stacking behavior, can be facilely regulated by controlling the comonomer ratio, thereby significantly affecting their macroscopic properties. A breakthrough in film performance could be further achieved by compounding PBOIs with fluorinated graphene (FG) via in situ polymerization. This series of FG/PBOI composite films exhibit high mechanical strength (119.8–371.2 MPa), modulus (2.5–6.7 GPa), heat resistance (5% weight loss, 551.3–620.6 °C), and hydrophobicity (water absorption within 72 h, 0.8–2.5%) as well as a low dielectric constant (2.09–3.4), which can well meet the development needs of microelectronic packaging. This work is also believed to provide theoretical guidance for the structural design and performance research of high-performance dielectrics.
研究领域:
材料科学
·
高分子化学
·
微电子
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Xiaoxia Hu,Jingquan Liu,Xiaole Gong,Jiangtao Xu,Jiuyong Yao,Kai Li,Honglei Liu
Herein, we reported a general and green synthetic strategy for photochromic functional alginate derivatives grafting with isoindolinone spiroxanthenes. Under mild condition, diverse 2-aminoalkyl isoindolinone spiroxanthene derivatives have been prepared from organic photochromic isobenzofuranone spiroxanthenes (including rhodamine B , rhodamine 6G and fluorescein), and grafted on alginate chains through amidation reaction using diamine as a linkage with water as a green solvent at room temperature . The photochromic properties of the fluorophores-modified polymers and the effect of pH value have been explored. Under acid conditions, the spiroisoindolinone rings of alginate derivatives are opened resulting in showing absorption bands and fluorescence with orange to green emission, while the alginate derivatives turned to colourless under basic conditions which is reversibly. In addition to biodegradability and biocompatibility, the polymers exhibit good film-forming properties simultaneously. The films and fibers produced from the alginate derivatives also project good fluorescence properties.
研究领域:
材料科学
·
化学
·
生物材料工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）