POLYMER DEGRADATION AND STABILITY
·
2019
·
IF 3.78
Shengnan Li,Ling Zhong,Shuo Huang,Dingfei Wang,Fengxiu Zhang,Guangxian Zhang
A novel flame-retardant ammonium salt of cholamine (methylenephosphonic acid) ethylene-organic phosphate acid (ACMPEP) with reactive -P O(ONH 4 ) 2 and OH groups was synthesized and characterized using nuclear magnetic resonance spectroscopy . The flame retardant not only could be grafted onto cotton fibers through P O C covalent bonds , but also react with each other to form poly-ACMPEP. The results showed that the finished cotton fabrics have excellent flame retardance, good stiffness and durability. The limiting oxygen index (LOI) value of 30% ACMPEP-treated cotton was 42.0%, and after 50 laundering cycles, the LOI value still had 30.0%. Thermogravimetric analysis (TGA) results showed that the decomposition temperature of treated cotton fibers in N 2 and air was 253 °C and 247 °C, lower than that of the control cotton fibers. Additionally, thermogravimetric-Fourier transform infrared (TG-FTIR) spectroscopy analysis indicated that the treated cotton fibers only released little combustible volatile during the thermal pyrolysis process. The cone calorimetry results showed that the heat release rate (HRR) and the total heat release (THR) of treated cottons were much lower than those of control cottons. The bending length increased 44.8% for the cotton fabric treated with 30% ACMPEP. The scanning electron microscopy (SEM) and the X-ray diffraction suggested that the finishing process only slightly affected the cotton fiber structure. The FTIR spectroscopy analysis confirmed the cross-linking reaction between ACMPEP molecules and cellulose . The tensile strengths of the finished cotton fabrics decreased a little. Together, the results suggested that the ACMPEP-treated cotton fabrics have excellent flame retardance and durability.
研究领域:
材料科学
·
纺织工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Wenju Zhu,Shuixia Liu,Huili Zhang,Dongxiang Li,Xiaohan Zhang,Wei Peng,Shuolong Wang,Shuang Xu,Chunming Zheng,Bowen Cheng
The durability and flame retardancy of cotton fabrics have been the focus of long-term research. In this paper, a method for preparing flame retardants through the direct modification of biomass was proposed, and the durable flame retardant of homologous cottonseed meal modified biomass flame retardants for cotton fabrics was achieved through biomass composition analysis and modeling. In this study, a cottonseed meal-phosphoric acid-boric acid synergistic bio-based flame retardant (CPB) was synthesized and characterized. The results of XPS and scanning electron microscope (SEM) showed that DC-CPB1 was mainly grafted on the superficial layer and surface of the fabric, and DC-CPB2 was mainly grafted on the surface of cotton fiber. In the vertical flammability test (VFT) and limiting oxygen index test (LOI), the LOI value of cotton fabric after 50 cycles of washing can reach up to 33.5 %, and the carbon damage length was reduced from 300 mm to a minimum of 69 mm, showing excellent flame-retardant performance and self-extinguishing ability. In the cone calorimetry test, the peak heat release rate (PHRR) was significantly reduced by 82.49 %, and the results of thermogravimetric (TG) analysis and thermogravimetry-infrared-mass (TG-IR-MS) test showed that CPB1 mainly had a gas phase. In contrast, CPB2 mainly had a condensed phase flame retardant mechanism. The mechanical properties of the cotton fabric remain good after treatment.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2020
·Vol. 12
·期 9
·1936
·
IF 3.426
Jiaxuan Niu,Wenjie Xu,Kaiyi Tian,Gang He,Zhengyong Huang,Qiang Wang
In this paper, the superhydrophobic coating was prepared by spraying the composites of fluorocarbon emulsion and nanosized silica on the conductive glass sheet for the triboelectric energy harvesting from water droplets. The low surface energy of fluorine in the fluorocarbon emulsion and nanosilica renders the coating with the static contact angle and sliding angle of 156.2° and 6.74°, respectively. The conductive aluminum tape was attached on the surface of the superhydrophobic coating to complete the circuit constituted with the aluminum electrode, charged superhydrophobic coating, and the conductive glass sheet. During the contact electrification with the bouncing water droplet, the superhydrophobic coating with the aluminum electrode can obtain the electric energy with an open-circuit voltage of 20 V and short-circuit current of 4.5 μA, respectively. While the control device only produced an open-circuit voltage of 0.2 V. The generated power by one drop was enough to light up 16 commercial LEDs. Results demonstrate that the fluorocarbon/silica composite superhydrophobic coating is potentially a strong candidate for scavenging energy in sliding mode from raindrops.Keywords:superhydrophobic;mechanical durability;energy harvesting
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2019
·
IF 3.78
Shuo Huang,Yajuan Feng,Shengnan Li,Yang Zhou,Fengxiu Zhang,Guangxian Zhang
A novel self-buffering flame retardant ammonium amino trimethylene phosphate (AATMP) was synthesized by a facile one-step water-solvent method to solve the problem of flammable cotton triggering easily and spreading fire. The structure of AATMP FR was verified by FT˗ IR, 1 H NMR, 13 C NMR, and 31 P NMR spectra. AATMP was grafted onto cotton fabrics using the dip-dry-cure method, and the grafted cotton was confirmed by FT-IR spectra. The limiting oxygen index (LOI) of cotton treated with a mass concentration of 15% AATMP solution reached 43.9%. After 30 and 50 laundering cycles, LOI values were maintained at 34.8% and 29.7%, respectively, suggesting that AATMP can be used as a durable flame retardant. The vertical flammability of treated cotton indicated no afterflame or afterglow time for comparison. Cone calorimetry results revealed that the total heat release of treated cotton was 1.6 MJ/m 2 , lower than that of control cotton (2.8 MJ/m 2 ). The peak heat release rate of control cotton was 195.1 kW/m 2 , much higher than that of treated cotton (16.1 kW/m 2 , further confirming the efficient fire resistance of AATMP. Thermogravimetry analysis and thermogravimetric-infrared spectroscopy indicated that AATMP FR altered the thermal decomposition pathway of treated cotton. X-ray diffraction patterns and scanning electron microscopy suggested that the structure of treated fibers was hardly affected. The tensile strength and whiteness of treated cotton fabrics were sustained well due to the self-buffering property of the neutral AATMP molecule.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2020
·
IF 7.635
Yuan-long Wu,Wei She,Dean Shi,Tao Jiang,Tong-hui Hao,Jie Liu,Qun-chao Zhang,Jun You,RobertK.Y. Li
Efficient anti-icing techniques are of great implications in many fields of our society. In this work, multi-functional copolymers containing siloxane units are designed to prepare durable anti-icing coating. The presence of siloxane groups endows the copolymers with triggered self-crosslinking ability, strong self-adhesiveness and high structural stability in severe conditions, which further enhanced the mechanical/chemical durability of the composite coatings . The optimal composite coating containing 40 wt% copolymer and 60 wt% fluorinated silicon dioxide exhibits excellent water repellency with contact angle beyond 160° and sliding angle below 2°. The water-freezing time can be postponed to 1765 s at −20 °C in concrete with the ice adhesion strength as low as 68.1 kPa. More impressively, the performance of this anti-icing coating can be well maintained even after over 110 cycles sandpaper abrasion at 2.5 kPa and 20 icing/deicing cycles, or immerging in various corrosive/organic conditions for more than 10 days. The composite coatings can be well applied on surfaces with diverse properties, such as metal, ceramics, glass and polymer for a myriad of anti-icing applications.
研究领域:
材料科学
·
化学工程
·
表面涂层
·
聚合物科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Fengxiu Zhang,Weiwei Gao,Yaling Jia,Yi Lu,Guangxian Zhang
A new halogen-free and formaldehyde-free ammonium salt of melamine hexa(methylphosphonic acid) (AMHMPA) was facilely synthesized as flame retardant (FR) material under water-solvent and low temperature condition to counter inflammable cotton fabric fire hazard. The reactive P O(NH 4 ) 2 and PO(OH) 2 groups from AMHMPA reacted with cotton reactive OH groups to form P O C bonds. A layer of AMHMPA was coated onto the treated-cotton surface, and a carbon skeleton was formed after combustion. The char residue percentages of the treated-cotton fabrics and untreated fabric were 38.5 and 3.6% at 600 °C, respectively. The phosphorus contents for the control, treated-cotton and burned-cotton were 0, 37.499 and 24.896%, respectively. The LOIs of cotton treated with 30–90 g/L AMHMPA reached 32.0–43.0%. After 50 laundering cycles (LCs), the LOIs still maintained 26.0–33.4%. AMHMPA-treated cotton had no cytotoxicity towards the environment and humans. These results demonstrated that AMHMPA-treated cotton exhibited eco-friendly, outstanding durability and excellent flame retardancy. TG-IR and cone calorimeter results confirmed AMHMPA condensation phase flame retardant mechanism.
研究领域:
材料科学
·
纺织工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 38
·e52917
·
IF 3.057
Chengyu Shi,Yulei Zhang,Xinyuan Lu,Zaozhen He,Aizhao Pan,Gang Chang,Ling He
The demand for highly-durable protective coatings for use in extreme environments is continually growing, however, poor durability and adhesion restricted their practical applications. Herein, we prepared a novel solution-processable graphene-based copolymer for fabricating highly-durable protective coatings. The random-structured copolymer GO- g -(PMMA- co -PMPS) was prepared by graphene-based initiator (GO- g -Cl) initiating methyl methacrylate (MMA) and 3-methacryloxypropyltrimethoxysilane (MPS) via surface-initiated atom transfer radical polymerization (SI-ATRP). The copolymers rendered the coatings with high transmittance (~95%), high hydrophobicity (water contact angles = 113.8 ± 2.13°), and strong adhesion (1.26–1.38 MPa). Tetrahydrofuran (THF)-casted coating surface presented a higher Si content and greater surface roughness than that cast from dimethyl carbonate (DMC), yielding more hydrophobic coating than those cast from DMC. The coatings could be coated on different substrates (glass, aluminum, and sandstone); and besides, the structures and performance of the coatings remained unchanged, even exposing to acid/alkali, salt, and ultraviolet light irradiation. These high-performance properties make the GO-based copolymers ideal candidates for fabricating high-durability protective coatings.
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
DIAMOND AND RELATED MATERIALS
·
2022
·
IF 3.806
Xiaoyi Zhang,Guoliang Lin,Shenglan Ma,Mingyi Liu,Wanxi Jiang,Chen Wu
This article has been retracted: please see Elsevier Policy on Article Withdrawal ( http://www.elsevier.com/locate/withdrawalpolicy ). This article has been retracted at the request of the Corresponding Authors and Editor-in-Chief. One of the corresponding authors, Xiaoyi Zhang, notified the journal of several issues relating to the article and requested its retraction. These issues have been detailed below: - The experiments were not performed as reported in the article. Specifically, the coating was applied to a wood surface, rather than the reported concrete surface. When subsequent experiments were conducted using concrete, the experimental data were not reproducible. - Some of the authors informed the journal that they were not aware of the content of the manuscript, nor of their authorship. - In addition, according to Dr. Zhang: “…the pictures and data in the paper are used incorrectly, resulting in unreliable experimental results”. These issues represent a clear violation of our publishing policies, and publishing ethics standards. The Editor-in-Chief has assessed the case and decided to retract the article. The corresponding authors agreed to the retraction.
研究领域:
材料科学
·
土木工程
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Jun-Fei Shen,Sheng-Nan Hu,Na Tian,Meng-Ying Li,Shuang-Li Yang,Si-Yi Tian,Ming-Shu Chen,Zhi-You Zhou,Shi-Gang Sun
Highly active and durable electrocatalysts for the cathodic oxygen reduction reaction (ORR) are vital for the large-scale commercialization of proton exchange membrane fuel cells. Alloying Pt with transition metals is a promising method to enhance the ORR catalytic activity, but the leaching of transition metals is inevitable, which deteriorates the stability. Here, we report the design of a P-doped PtCo electrocatalyst supported on carbon via a facile one-pot hydrothermal method. On the one hand, the introduction of P into the carbon support by phytic acid can enhance the anchoring ability of the PtCo alloy and inhibit the migration of nanoparticles. On the other hand, the doping of P into the lattice of the PtCo alloy further tunes the electronic effect, which improves activity and stability simultaneously. The mass activity of as-prepared P5-PtCo/C at 0.9 V can reach 0.72 A mgPt–1, which is 4.5 times higher than that of commercial Pt/C. After an accelerated durability test (ADT) of 30,000 potential cycles, the mass activity only decreased by 9.4%. Meanwhile, the average particle size of the catalyst slightly increased from 4.94 to 5.15 nm after the ADT of 70,000 potential cycles. This study provides a facile approach for constructing nonmetal-doped PtM catalysts with improved durability for the ORR.
研究领域:
电化学
·
材料科学
·
催化
·
能源材料
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Yanjie Zheng,Keli Wang,Lei Sun,Huili Shi,Xia Zhang
Superamphiphobic materials have a higher and broader application value compared to superhydrophobic materials. Nevertheless, durability has always been an obstacle to its practical application. Herein, we report a method that utilizes 1H, 1H, 2H, 2H-perfluorodecyltrichlorosilane (PFDTS) as an esterification reaction modifier agent for kaolin, and polyurethane as adhesive binding to substrates, so as to construct inorganic/polymer composite coatings , for obtaining a durability superamphiphobic material. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy characterization reveal that kaolin is successfully grafted by PFDTS. Thermogravimetry and differential scanning calorimetry tests exhibit that the material can withstand temperatures up to 400 °C. The self-cleaning test demonstrates that the as-prepared coating is repulsive to a variety of liquids such as water, milk, mud, olive oil, and n-hexadecane, which has a surface tension as low as 27.5 mN/m. It still maintains superamphiphobicity after the material is polished by sandpaper and the retention rate is above 96 % when the friction distance is about 4500 cm. After soaking in strong acid and strong base, it shows superior acid resistance and favorable alkali resistance. After aging durability irradiation for 300 min, it still retains superamphiphobicity. In addition, the biological contamination resistance tests indicate that it has a certain adhesion resistance to gram-positive bacteria Staphylococcus aureus and gram-negative bacteria Escherichia coli . Therefore, it is a promising kind of durable anti-fouling material for underground oil pipelines and construction.
研究领域:
材料科学
·
表面化学
·
聚合物科学
·
涂料与薄膜
·
生物医学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Junping Shi,Lielin Wang,Hua Xie,Shidi Yao,Xiuqi Pu,Zhu Liu,Xiaojiang Chen,Yun Ding
Highly reactive fission product cesium may volatilize at high temperatures. PbO–B 2 O 3 –ZnO glass with low melting temperature and excellent chemical durability can be used as a potential matrix for immobilizing Cs. In this work, five PbO–B 2 O 3 –ZnO glasses with different contents of Pb were synthesized via a melt-quenching process. These specimens were characterized with XRD , Raman, DTA and viscosity measurements . The results showed that the melting temperature decreases, viscosity decreases and structural polymerization increases with increasing lead content. Cs-doped 35PbO–60B 2 O 3 –5ZnO glasses were synthesized at low temperatures. XRD results revealed the amorphous nature of the glass solidified bodies. EDS and ICP-MS studies confirmed that Cs is retained in the glass. Clear vitrified waste products containing up to 13.6 wt% Cs were obtained. The chemical durability of the samples was evaluated via PCT-A and MCC-1 method. For the glass solidified body comprising a Cs/matrix ratio of 0.136, the leaching rate of Cs was 1.6 × 10 −1 g m −2 d −1 from the PCT test, which indicates that it has a good chemical stability. 35PbO–60B 2 O 3 –5ZnO glass was expected to be a suitable matrix for Cs immobilization.
研究领域:
材料科学
·
核废料管理
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Mengnan Yu,Rongzhan Liu,Yanwei Du,Zhenyu Ni
Cotton fabric is widely used for its excellent wearability but often suffers from drawbacks such as poor stain resistance, susceptibility to corrosion, and low colorfastness. Here, we introduce a novel method to create colorful superhydrophobic cotton fabric using octadecylamine-modified dialdehyde cellulose (DAC/ODA) particles as building units, which are synthesized via a Schiff base reaction and subsequently dyed with active dyes. Leveraging the film-forming ability of ODA and the affinity between cellulose materials, DAC/ODA formed a robust coating on the cotton surface, with its microstructure precisely controlled through thermal induction. The resulting fabric (DAC/ODA/Cotton) exhibited exceptional superhydrophobicity, with a water contact angle of 155° and an osmotic pressure of 426.2 mm. The uniform coverage of DAC/ODA on cotton fibers also ensured high air permeability (33.1 mm/s). Additionally, DAC/ODA/Cotton demonstrated outstanding antifouling performance against various common liquids and water can easily remove dust from its surface. Importantly, the fabric maintains its superhydrophobicity under extreme conditions such as high temperature, UV radiation, and acid-base exposure. Even after 100 abrasion cycles, no significant changes in surface morphology and color on DAC/ODA/Cotton were observed. This fluorine-free, environmentally friendly approach offers significant potential for developing multifunctional textiles and coatings with broad applications while reducing environmental impact.
研究领域:
材料科学
·
纺织工程
·
环境科学
✓ 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）