Nanomaterials
·
2022
·Vol. 12
·期 22
·4048
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IF 5.719
Wenju Zhu,Qing Wang,Mingyang Yang,Minjing Li,Chunming Zheng,Dongxiang Li,Xiaohan Zhang,Bowen Cheng,Zhao Dai
In recent years, we have witnessed numerous indoor fires caused by the flammable properties of cotton. Flame-retardant cotton deserves our attention. A novel boric acid and diethylenetriaminepenta (methylene-phosphonic acid) (DTPMPA) ammonium salt-based chelating coordination flame retardant (BDA) was successfully prepared for cotton fabrics, and a related retardant mechanism with ion transfer was investigated. BDA can form a stable chemical and coordination bond on the surface of cotton fibers by a simple three-curing finishing process. The limiting oxygen index (LOI) value of BDA-90 increased to 36.1%, and the LOI value of cotton fabric became 30.3% after 50 laundering cycles (LCs) and exhibited excellent durable flame retardancy. Fourier-transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) methods were used to observe the bonding mode and morphology of BDA on cotton fibers. A synergistic flame-retardant mechanism of condensed and gas phases was concluded from thermogravimetry (TG), cone calorimeter tests, and TG-FTIR. The test results of whiteness and tensile strength showed that the physical properties of BDA-treated cotton fabric were well maintained.Keywords:cotton;flame retardant;thermal stability;DTPMPA;group synergistic
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
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yanji Zhu,Hongwei Li,Mingliang Zhu,Huaiyuan Wang,Zhenggui Li
Anti-scaling is one key problem in various industrial productions. The coating technology is the most effective protection method for metals and pipelines. As a good scale inhibitor, diethylene triamine penta(methylene phosphonic acid) (DTPMPA) generally takes effect after placement into wastewater and through discharging with water flow. In this study, a novel DTPMPA-modified superhydrophobic anodized aluminium (DSAA) coating was designed, fabricated and utilized for anti-scaling of CaCO 3 deposition. The unique anti-scaling performance on the surface of the DSAA coating originated from the gradual release of DTPMPA at the solution/coating interface, plus the effect of superhydrophobic anti-scaling. During the CaCO 3 deposition, the abundant air layer retained at the surface of the superhydrophobic DSAA coating prevented further deposition of CaCO 3 . In addition, the active DTPMPA gradually and dynamically released from the DSAA coating to the water/coating interface chelated with Ca 2+ and further stopped the possible combination between Ca 2+ and CO 3 2− . This synergistic antiscaling effect of the DSAA coating showed a wide application prospect in effective anti-scaling on various surfaces. This work provides a new way of designing and fabricating dynamic superhydrophobic coatings for anti-scaling.
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 the Taiwan Institute of Chemical Engineers
·
2019
·
IF 3.834
Xixi Chen,Huaiyuan Wang,Chijia Wang,Wenbo Zhang,Chongjiang Lv,Yanji Zhu
Carbon nanotubes (CNTs), as a carrier of diethylenetriaminepenta(methylphosphonic acid) (DTPMPA), combining with flake zinc and PVDF powders, were used to fabricate a novel organosilicon epoxy resin-based (EP) composite coating (EP/iDCNTs/Zn/PVDF) for antiscaling and anti-corrosion purposes. Compared with EP coating, the EP/iDCNTs/Zn/PVDF composite coating exhibited unique antiscaling properties with the CaCO 3 deposition on the coating surface decreased by 81.6%. It was mainly because the coating surface contains DTPMPA, and Zn 2+ released by corrosion of Zn powder, which jointly inhibited the deposition behavior of CaCO 3 . Meanwhile, the fabricated composite coating hardly adhered by CaCO 3 crystals which was due to its higher hydrophobicity. Moreover, anti-corrosion tests proved that the prepared composite coating's impedance modulus was about 2 orders higher than that of the EP coating. This was ascribed to the improving shielding effect of fillers and high hydrophobicity of coating, preventing the water and oxygen molecules from penetrating into the composite coating.
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
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Gang Long,Xue Ma,HouYong Yu,Meijin Jin,Xuefei Chen,Xiaohua Wang,Zengwen Yao,Dengteng Ge,Cheng Zeng,Shengjian Wang,Haojie Zang,Yi Jiang
The inherent flammability, lack of antibacterial function, and “performance-sustainability trade-off” caused by traditional additives of polyamide 66 (PA66) severely restrict its application in safety-critical fields like aerospace and medical devices. Thus, this study prepared a green bio-nanohybrid (DCZ) by constructing interfacial chelation between Zn 2+ and diethylene triamine penta(methylene phosphonic acid) (DTPMPA) on the surface of cellulose nanocrystals (CNC). When compounded with PA66, DCZ exhibits excellent properties: limiting oxygen index (LOI) reaches 31.3 %, peak heat release rate (pHRR) decreases by 65.3 %, total heat release (THR) decreases by 26.8 %, and no melt dripping as well as good antibacterial performance. Notably, the chelation-induced cross-linked interphase also improves the material's tensile strength by 61.9 %. After 30 days of UV irradiation or immersion in pH 3–11 solutions, the LOI loss remains less than 4 %, breaking the bottleneck of poor weather resistance of traditional flame-retardant PA66 under harsh environments. This strategy upgrades PA66 into a multifunctional “safety material” platform, which can be processed into films, fibers and complex profiles. It provides a green and feasible technical path for the development of high-end safety materials for aerospace interiors, medical devices and other fields.
研究领域:
材料科学
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聚合物复合材料
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阻燃材料
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纳米技术
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可持续材料
·
生物高分子
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaodong Jin,Xinyi Wu,Wufei Tang,Zheni Tan,Wanfu Wang,Shibing Sun
Layer by layer (LBL) self-assembly coatings upon expandable polystyrene (EPS) surface play an important role in improving its flame retardancy. However, a large number of layers is needed to achieve a satisfied fire performance, and the coatings are difficult to adhere on the inert EPS surface, resulting in the poor durability. In this work, the surface of EPS was activated by ultraviolet ozone (UVO) with the appearance of oxygen contained groups, then a LBL coating with only two bilayers (branched polyethyleneimine (BPEI)-kaolinite (kaol)-BPEI-diethylene triamine penta (methylene phosphonic acid)) was covalently connected on the EPS surface. Compared with neat EPS, the obtained E-K 5 D 30 sample increased the value of limiting oxygen index (LOI) from 18.8 % to 37.7 %, improved the ignition time from 59 s to 95 s, reduced the peak heat release rate (pHRR) value from 282.0 kW/m 2 to 220.9 kW/m 2 , and enhanced the char residues from 6.3 % to 32.3 % after the combustion. Moreover, an ultraviolet (UV) curing layer with P/N elements was prepared upon E-K 5 D 30 sample to maximize the flame retardant durability. A novel amino-intercalated kaol was used to play a smoke suppression role. The results showed that E-K* 5 D 30 -P 8 N 3 sample further increased the LOI to 39.2 %. Even after 12 h washing, the E-K* 5 D 30 -P 8 N 3 sample exhibited a slight LOI reduction to 37.8 %, and fire performance index (FPI) value of 0.405 m 2 ·s/kW, showing the successful construction of coatings with good fire safety and flame retardant durability.
研究领域:
材料科学
·
聚合物化学
·
消防安全工程
✓ 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）