JOURNAL OF CULTURAL HERITAGE
·
2022
·
IF 3.229
Minghao Jia,Xiaoxia Huang,Xiaogang Zhang,Gang Hu
Improving the strength decrease caused by fungal metabolites is still an arduous task in the field of paper materials protection. A set of damaged Kangxi Dictionary from Qing Dynasty was chosen as samples in this work. The main goal of this work is to develop high-efficiency and eco-friendly media with the characteristics of antifungal and reinforcement, to preserve paper materials and continue the historical and scientific research value of cultural heritage. PHMG as an efficient antifungal was used in this work. For better behavior, the epoxy group of KH560 can be induced by the amino group in PHMG by ring opening reaction to form PHMG-KH560 colloidal complex. Spraying PHMG-KH560 on paper could establish Si-O-C bonding and increased the hydrogen bond between polymeric material and paper fibers, which simultaneously inhibited fungi and improved mechanical strength of the original paper, even after the artificial aging. PHMG-KH560 had certain antifungal activity against five fungi, such as Aspergillus versicolor, and Aspergillus Niger , and had better inhibitory effect on Cladosporium herbarum, Trichoderma viride , and Penicillium expansum . The ancient writing ink on the paper sprayed with PHMG-KH560 did not affect its visual beauty, which also indicated that the complex reagent was expected to be applied to the antifungal and reinforcement of paper materials.
研究领域:
文物保护
·
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2017
·Vol. 25
·期 2
·1365-1375
·
IF 3.417
Ni Shuzhen,Wang Chunjian,Bian Huiyang,Yu Zhihuai,Jiao Liang,Fang Guigan,Dai Hongqi
The exploitation of light-weight paper-based cellulosic materials (PBCM) is beneficial for protecting the environment, cutting production cost and improving utilization efficiency of cellulose. In this study, a simple reaction using PEI (Polyethyleneimine) and KH560 was reported to improve the physical performance and hydrophobicity of PBCM. FTIR spectra indicated that the epoxide group of KH560 disappeared during reaction with PEI. Physical properties and hydrophobicity of the dried PBCM were determined after impregnation with the mixture of enzymatic starch and PEI-KH560. Compared with the control, the dry tensile index, wet tensile index and folding endurance of PBCM were increased by 27.1, 61.4 and 137.5%, respectively, when the dosage of PEI-KH560 was 1.35%. If starch (6.35 g/m 2 ) was added together with PEI-KH560 (1.35%), the dry tensile index could increase by 98.6%. The pH and alkaline reserve value of PBCM were also improved. The addition of PEI-KH560 improved the thermal stability of starch, thus was beneficial for the increase of thermal stability of PBCM. This novel method adopted in this study to improve the physical performance, hydrophobicity and alkaline reserve value of PBCM provided a cost-efficient and simple way to broaden its potential application fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yi Zhao,Shuzhen Ni,Ying Gao,Xin Zhang,Xingxiang Ji,Fengshan Zhang
Novel eco-friendly strength agent has inspired much attention of researchers. Herein, the PEI-KH560 prepared by PEI (polyethyleneimine) and KH560 (γ-glycidyl ether propyl trimethoxysilane) was added in the pulp suspension to enhance the paper performance. The results showed that the m(PEI):m(KH560) ratio and PEI's molecular weight were closely related with the paper strength and hydrophobicity. The SEM morphology of paper surface showed that the fiber-fiber crosslinking reached the tightest, at the optimal m(PEI):m(KH560) ratio and PEI's molecular weight. The results showed that when the M w (molecular weight) of PEI was 10,000 and the m(PEI):m(KH560) ratio was 1:2, the PEI-KH560 presented the best strengthening performance on the paper strength and hydrophobicity. Dry tensile index and wet tensile index could reach 29.9 N·m/g and 1.37 N·m/g after adding the PEI 10000 -KH560 in pulp suspension before the paper formation. Further, the effect of process conditions (temperature, time, the addition amount, and pulp concentration) on the strength and hydrophobicity of paper network structure was investigated, after adding PEI-KH560 into the pulp suspension. It was of great significance for studying the mechanism between the chemical structures of PEI-KH560 and paper performance, which provided valuable theoretical practice on the preparation of novel strength agent.
研究领域:
材料科学
·
造纸工程
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Zhengwei Yang,Guoqing Xiao,Chunlin Chen,Chunyan Chen,Fei Zhong,Mingtan Wang,Rui Zou
Herein, the excellent properties of one dimension (1D) and two dimension (2D) nanoparticles were fully combined to enhance the thermal stability and flame retardancy of waterborne epoxy intumescent fire retardant (IFR) coatings. Specifically, layered hexagonal boron nitride (h-BN) nanosheet-linked acidified carbon nanotubes (CNTs) hybrids (BP@Si/CNTs) were prepared using polydopamine (PDA) and γ-(2,3-epoxypropoxy)propytrimethoxysilane (KH560) as bridging agents. The results of the fire test, furnace test and thermogravimetric analysis indicated that the incorporation of 2 wt% of BP@Si/CNTs hybrids in the IFR coating significantly improved the thermal stability and flame retardancy of the char layer. The backside temperature of the BP@Si/CNTs 2.0% /EP sample decreased by 89.3 °C, the expansion rate increased by 11.53, and the residual char increased by 11.05 wt% compared to the control EP. The potential flame retardant mechanism was investigated by residual char analysis. The mechanism investigations indicated that the improved fire resistance of the composite coatings is attributed to the enhancement of the char layer by the physical barrier effect of the h-BN nanosheets and the "skeletal framework" effect of the CNTs during the combustion process.
研究领域:
材料科学
·
防火材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yali Gao,Weisheng Yang,Wenbo Yi,Shuzhen Ni,Yingjuan Fu,Menghua Qin,Fengshan Zhang
In recent years, researchers have put much attention on the improvements and upgrades of novel wet strength agent in the papermaking fields, especially in the usage of household paper. Herein, PEI M -KH560 by polyethyleneimine (PEI) and γ-glycidyl ether propyl trimethoxysilane (KH560) was synthesized with five molecular weights (Mw) of PEI at 600, 1800, 10,000, 70,000 and 750,000. Results showed that the molecular weight greatly influenced the physicochemical properties of PEI-KH560, such as the size and thermal stability. The intrinsic cationic charge of PEI-KH560 provided the bonding sites with the paper fibers, forming strengthened fiber-fiber joints. It was shown that the dry, wet strength and hydrophobicity of cellulosic paper sheets were obviously improved. When the m (PEI):m(KH560) is 1:2, the strength of papers after sizing by Mw of PEI at 600 and 1800 is the most obvious, with the dry strength increased by 227.9 % and 187.5 %, and the wet strength increased by 183.8 % and 207.8 %, respectively. The maximum hydrophobicity was found at the PEI 1800 -KH560 with the contact angle value of 130.6°. The resultant environmental-friendly agent (PEI-KH560) obtained in this work provides valuable significance for the preparation of household and food packaging paper.
研究领域:
制浆造纸工程
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2019
·
IF 3.074
Yunqing Xia,Yi He,Chunlin Chen,Youqing Wu,Fei Zhong,Jingyu Chen
In this work, the hydrophilic organic films were successfully coated on g-C 3 N 4 nanosheets through facile co-modification of dopamine (DA) and silane coupling agent (KH560). The co -modification of polydopamine (PDA) and KH560 on lamellar g-C 3 N 4 greatly enhanced dispersion of g-C 3 N 4 in aqueous solution and dramatically improved the compatibility and interfacial interaction with waterborne epoxy. The effect of incorporating modified g-C 3 N 4 nanosheets into waterborne epoxy on anticorrosion performance for P110 steel substrates were demonstrated through electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and salt spray test. The results revealed that the |Z| 0.01Hz value and percentage coating resistance (R c ) gain (η c %) of nanocomposite coating increased by 977% and 90.72% with the addition of modified g-C 3 N 4 nanosheets in comparison with pure waterborne epoxy coating, exhibiting outstanding anticorrosion abilities. The reinforced anticorrosion performances of nanocomposite coating could be attributed to the notable shielding effect and well dispersibility of modified g-C 3 N 4 nanosheets.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 30
·期 2
·1626-1636
·
IF 2.324
Li Yuexuan,Duan Yugang
Silicon coupling reagent is regarded as a common additive on surface treatment of polymer due to its high bonding strength and low cost. In this paper, a series of γ-(2, 3-epoxypropoxy) propyltrimethoxysilane (KH560)-based reduced graphene oxide (RGO)@Fe 3 O 4 (KH560/RGO@Fe 3 O 4 ) composites with different ratio of Fe 3 O 4 nanoparticles (NPs) are synthesized by a facile hydrothermal method. It is confirmed that the silicon reagent KH560, as a hopeful candidate for increasing the RGO lattice defects, is favorable to improve the electromagnetic wave absorption. Meanwhile, the microwave attenuation mechanism of KH560/RGO@Fe 3 O 4 composite suggests that the dielectric loss mainly causes by multiple Debye dipolar relaxation and its magnetic loss comes from the eddy-current effect of Fe 3 O 4 NPs over the high frequency range. In consequence, the KH560/RGO@Fe 3 O 4 composite endows the excellent absorption performance, the reflection loss (RL) value is optimized to − 25 dB at 14.1 GHz with a thickness of 3 mm and the maximum frequency bandwidth for RL < − 10 dB is 4.1 GHz with a thickness of 4 mm.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2019
·Vol. 30
·期 5
·1735-1743
·
IF 1.637
Chen Yufei,Wu Yunzhong,Geng Chengbao,Li Zhiguo,Dai Guoqing,Cui Weiwei
KH560-SiO 2 /polyethersulfone/bismaleimide-phenolic epoxy resin (KH560-SiO 2 /PES/BMI-EPN) composite had been prepared and studied, in which BMI-EPN resin was used as matrix, PES resin and SiO 2 modified by silane coupling agent (KH560-SiO 2 ) as toughness reinforcing agent. The curing kinetics and the apparent activation energy of the resin system were studied and calculated by the non-isothermal differential scanning calorimetry. The micro-morphology was investigated by scanning electron microscope (SEM), and the mechanical, thermal and dielectric properties of the composites was analyzed. The morphology showed that PES resin and KH560-SiO 2 were evenly dispersed in the matrix and a multi-phase structure was formed. The flexural modulus, flexural and impact strength of composite were 4.2 GPa, 156.2 MPa and 20.9 kJ m −2 , with an increase of 31%, 50% and 83% than those of resin matrix, respectively, when the content of PES resin was 4 wt% and KH560-SiO 2 was 1.5 wt%. Furthermore, the thermal decomposition temperature ( T d ) of the composite was 393 °C which was 15 °C higher than that of resin matrix. The results of dielectric properties showed that the dielectric constant of the composite first decreased and then increased with the increase of KH560-SiO 2 doping content, and the dielectric loss did not change significantly. The dielectric constant and dielectric loss tangent were 4.55 and 0.0029 at 10 Hz, when the content of KH560-SiO 2 was 1.5 wt%. This study provided theoretical data for expanding the application range of phenolic epoxy and bismaleimide.
研究领域:
材料科学
·
高分子化学
·
复合材料工程
✓ 已验证
DOI
高影响因子
Processes
·
2024
·Vol. 12
·期 4
·654
·
IF 2.8
Ting Xiao,Yudian Wang,Xia Lang,Siyu Chen,Lihua Jiang,Fujun Tao,Yequan Xiao,Xinyi Li,Xinyu Tan
Superhydrophobic surfaces with non-wetting characteristics have been considered to be potential candidates for ice/frost prevention. In this study, a transparent superhydrophobic coating was created by using a simple method that employed (3-glycidoxypropyl) trimethoxysilane (KH560) and 1,2-Bis (trimethoxysilyl) ethane (D26) as coupling agents and epoxy resin (E51) as an adhesive. The synergy between KH560 and D26 significantly improves the long-term outdoor durability, anti-icing, and anti-frosting performance of the superhydrophobic coating. The coating also has good acid and alkali resistance, UV resistance, and durability. The obtained SiO2@E51@KH560@D26 can delay the freezing time of water by 1974 s, much longer than bare glass (345 s) and also longer than the coatings with only D26 (932 s) or with only KH560 (1087 s). Moreover, the SiO2@E51@KH560@D26 showed an improved anti-frosting capability compared with the other three samples and better maintained its superhydrophobic properties at low temperatures. Our study proposes a potential method to fabricate a superhydrophobic coating with both anti-icing and anti-frosting properties.
研究领域:
材料科学
·
表面工程
·
涂层技术
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Wei Zhao,Hongjing Liu,Chengpeng Zhang,Yuyang Cao,Yuying Xu,Xueli Liu,Zhen Lu
Metal–organic frame UiO-66-NH 2 was modified by 3-glycidyl ether oxypropyl trimethoxysilane (KH560), and KH560-UiO-66-NH 2 was synthetized and added to Pebax to prepare KH560-UiO-66-NH 2 /Pebax mixed matrix membranes (MMMs). The epoxy group of KH560 had an amine-epoxidation reaction with the NH 2 in UiO-66-NH 2 , which prevented UiO-66-NH 2 from agglutinating in the MMMs. In addition, the N H bond and OH bond of KH560-UiO-66-NH 2 could theoretically form hydrogen bonds with CO and N H bonds in the main chain of polymerization, respectively, so as to improve the interfacial compatibility between fillers and polymers. The structure and properties of the filler particles and MMMs were evaluated by Fourier transform infrared spectrometer, x-ray diffraction, scanning electron microscopy, and thermogravimetric analyzer. The results showed that the filler particles were successfully synthesized, and had good crystallinity, uniform size distribution, and good thermal stability. The inorganic and organic interfaces of MMMs had no obvious interface defects. The obtained KH560-UiO-66-NH 2 /Pebax MMMs showed CO 2 permeability of 111.52 Barre and CO 2 /N 2 selectivity of 92.16, which were 85.65% and 88.73% higher than that of pristine membranes, respectively. The gas separation performance of MMMs was significantly improved, exceeding the upper bound of 2008 Robeson.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2023
·Vol. 30
·期 6
·1-13
·
IF 2.8
Su Hao,Yang Jin
Using 3-aminopropyltriethoxysilane (KH550), γ-glycidyloxypropyltrimethoxysilane (KH560) and silica with different particle sizes as raw materials, the grafting reaction through layer-by-layer assembly strawberry-like silica particles with multi-scale effects were prepared, and their structures were characterized by infrared spectroscopy (FT-IR), hydrogen nuclear magnetic resonance (NMR), X-ray diffraction (XRD), transmission electron microscopy (TEM) and other testing methods. Then it was physically blended with laboratory-made water-based epoxy resin WEP, and the coating with superhydrophobic properties was prepared by the low surface energy modification of methyltrimethoxysilane (MTMS). Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) to characterize the blending stability and heat resistance of the coating, and to analyze its morphological characteristics with scanning electron microscopy (SEM), and to analyze its abrasion resistance by measuring the change in the surface contact angle of the coating under certain conditions, Chemical resistance. The results showed that the prepared strawberry-like silica particles reached the expected structure, and formed Pickering emulsion similar to oil-in-water after blending with WEP, which was a stable emulsion system of solid particles. At the same time, due to the introduction of strawberry-like silica particles and the low surface energy modification of MTMS, the modified WEP has superhydrophobic properties, as well as excellent abrasion resistance, corrosion resistance and self-cleaning effect.
研究领域:
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2019
·
IF 6.282
Dan Yang,Xinxin Kong,Yufeng Ni,Dahai Gao,Bin Yang,Yangyang Zhu,Liqun Zhang
Nitrile-butadiene rubber (NBR) composites filled with functionalized BN platelets were successfully prepared to yield materials with high thermal conductivities and dielectric constants. To enhance the interfacial interactions between BN platelets and NBR matrix, non-covalent functionalization of poly(dopamine) (PDA) followed by covalent functionalization of γ-(2,3-epoxypropoxy)propytrimethoxysilane (KH560) were employed for BN platelets surface modification to yield BN-PDA-KH560. This route led to good filler dispersion of BN-PDA-KH560 plateltes with decreased interfacial thermal resistances. Large thermal conductivity (0.409 W/mK) was achieved with 30 vol% BN-PDA-KH560/NBR composite. This value was 2.6 folds higher than that of pure NBR (0.157 W/mK). The 30 vol% BN-PDA-KH560/NBR composite not only exhibited relatively high dielectric constant (9 at 100 Hz) but also remained low dielectric loss tangent (0.12 at 100 Hz). Overall, these findings provide a simple and effective route for preparing high-performance NBR composites with large thermal conductivities and dielectric constants for potential application in electronic devices.
研究领域:
材料科学
·
化学工程
·
复合材料
✓ 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）