MOLECULAR CRYSTALS AND LIQUID CRYSTALS
·
2023
·
IF 0.7
Zhongli Zou,Kun Liu,Yang Li
AZ31B has the advantages of high specific strength, low melting point and good toughness, but one of the significant disadvantages is poor corrosion resistance. This topic designed and prepared a corrosion-resistant composite coating of organic polymer phytic acid and rare earth praseodymium salt based on this characteristic. The test results show that the corrosion resistance of the PA/Pr composite coating is more potent than that of a single phytic acid conversion coating, and the surface of the composite layer is clustered particles with good compactness. The conversion coating mainly consists of praseodymium hydroxide, oxide and some phytate compounds. In addition, density functional theory (DFT) was used to analyze the inhibition mechanism of phytic acid; Molecular dynamics (MD) was used to evaluate the adsorption characteristics of phytic acid on metal substrates and rare earth metal oxides.
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 3.1
Bingyue Huang,Shaoyuan Wu,Deyu Liu,Yi Zhang,Jinghan Hu,Yanling Yue,Shiyi Ming,Guoyong Zhou,Xingyu Guan,Kui Wang,Weijiang Huang,Wei Yan
To address the limitations of traditional binary flame retardant systems for waterborne polyurethane (WPU), this work proposes a ternary hybrid flame retardant design strategy: boron nitride (BN) particles coated with phytic acid (PA) and chitosan (CS) (BN@PA-CS) were fabricated via a facile, green modification strategy, to overcome poor dispersion and weak interfacial interaction from physical blending. The flame-retardant, mechanical and rheological behaviors of modified WPU were explored. The results show that, compared with pure waterborne polyurethane (WPU), the peak heat release rate (pHRR) of the BN@PA-CS7 sample decreased by 34.5%, the total heat release (THR) decreased by 45%, and the total smoke production (TSP) was reduced by up to 75%, demonstrating excellent smoke suppression performance. BN@PA-CS suppresses complete polymer oxidation combustion and toxic gas emission. Furthermore, a trade-off in mechanical properties: low filler loadings (1–2 wt%) improve tensile strength, yet higher contents (5–7 wt%) trigger property deterioration owing to filler aggregation; elongation at break decreases monotonically. Besides, complex viscosity of WPU is reduced. This work provides a strategy to develop biomass-derived flame retardants by constructing a ternary hybrid structure on inorganic particles, which offers new insights for balancing flame retardancy and comprehensive properties of polymer materials.
✓ 已验证
DOI
高影响因子
Materials Horizons
·
2023
·
IF 13.3
Cuiwen Liu,Ru Zhang,Yao Wang,Chengmeng Wei,Feng Li,Ning Qing,Liuyan Tang
In recent years, flexible strain sensors have attracted increasing interest, and accurate sensing and comfortable wearables are highly demanded. However, current flexible strain sensors fail to have wide linearity and high sensitivity simultaneously, and their adhesion is insufficient for convenient wear and precise motion monitoring. Herein, chitosan/poly(vinyl alcohol) hydrogels with phytic acid (PA) and boric acid (BA) as crosslinkers (CS/PVA–PA–BA hydrogels) were fabricated. The synergy of phytic acid and boric acid not only improved the mechanical properties of the obtained hydrogels (1070% of fracture strain and 0.83 MPa of fracture stress), but also provided them with outstandingly strong adhesion. Their adhesive strength was up to 527 kPa for a variety of materials, including glass, silica rubber, steel, polytetrafluoroethylene (PTFE), and skin. In addition, the hydrogel-based strain sensor demonstrated high sensitivity (gauge factor = 4.61), a wide linear strain range (up to 1000%, R2 = 0.996), fast response time (90 ms), and good stability. A flexible strain sensor with such high sensitivity and wide linear range simultaneously, to the best of our knowledge, has never been reported before. The development of CS/PVA–PA–BA hydrogels is expected to inspire a novel method for high-adhesive and high-sensing-performance wearable electronics.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Ling Sun,Ziwei Wang,Lan Ding,Qiuyan Zhang,Di Li,Xiaohui Liu,Yuanlin Ren,Yuesheng Li
Herein, a multifunctional composite coating is constructed on silk fabrics by a facile impregnation strategy. In detail, the pre-period involves the aggregation growth of sophora flower extract/phytic acid-lanthanum ion-silk fibroin complex network, while the post-period introduces a water repellent layer that is composed of hydroxyl-terminated polydimethylsiloxane and hexadecyltrimethoxysilane composite. Benefiting from the synergistic effect of P, Si and N elements, the optimized finished silk sample denoted as D/FR/W R -SF exhibits a limiting oxygen index value of up to 29.3%, and shows a damage length as low as 9.4 cm in the vertical burning test. Since the sophora flower extract contains flavonoids such as rutin and quercetin , it confers good antibacterial activity and ultraviolet resistance to silk fabrics. The results display that D/FR/W R -SF inhibits the colony propagation of Escherichia coli and Staphylococcus aureus , and achieves an ultraviolet protection factor value of 38.61 compared with the control silk fabrics. Attributed to the directional arrangement of long-chain alkane and Si-CH 3 , D/FR/W R -SF exhibits good water repellency with a water contact angle of 138°. Additionally, D/FR/W R -SF also presents satisfactory washing resistance (integrated properties after 25 laundering cycles). Therefore, such a complete multifunctional composite coating scheme shows great potential for expanding advanced textile applications.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2022
·
IF 5.907
Wen-Juan Yan,Sheng Xu,Chi-Jie Ding,Zhi-Hao Liu,Yan Hu,Qi-Xun Fan,Jiang-Shuo Li,Xian-Yao Tian,Hong-Yan Zeng
In this paper, an interlayered/surface-modified flame retardant (LDHs@PA-MEL) was prepared via a one-pot method with phytic acid (PA), melamine (MEL), and layered double hydroxides (LDHs-C) and used as a novel flame retardant for polypropylene (PP). In LDHs@PA-MEL, PA and MEL self-assembled to form a PA-MEL supramolecular network for functionalization on the surface of LDHs-C, and phytate anions intercalated into the interlayer . The extreme dispersibility of LDHs@PA-MEL in PP is attributed to the dual modification of PA and MEL. With the addition of 20 wt%, the PP/LDHs@PA-MEL composites achieved the limiting oxygen index (LOI) of 29.6%, whereas the PP/LDHs-C composites exhibited only LOI of 24.8%. The peak heat release rate (PHRR), total heat release (THR) and total smoke production (TSP) for PP/LDHs@PA-MEL were 409 kW∙m −2 , 70.3 MJ∙m −2 , and 7.1 m 2 , respectively, which presented declines of 63.5%, 26.2% and 43.7% compared with those of Neat PP. The flame retardancy of LDHs@PA-MEL was mainly due to catalytic charring, release of non-combustible gases, and physical barrier effects. More specially, this work provides a feasible method for the preparation of high-performance PP composites.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2023
·
IF 5.9
Song Li,Feng Zhao,Xueya Wang,Zhihua Liu,Jingze Guo,Yutong Li,Shuangmei Tan,Zhenxiang Xin,Shuai Zhao,Lin Li
Green flame retardants have drawn much attention because of their environmental friendliness. But for the high flame retardancy of flammable polymers, most existing green flame retardants are unsatisfactory, even the flame-retardant process can not achieve high efficiency and environmental protection. In this work, flame retardants and flame-retardant process are addressed in a two-pronged approach. An eco-friendly bio-based synergistic flame retardant (PAU) was synthesized based on phytic acid (PA) and urea (U) through simple complexation assembly in water. The designed flame retardant coating can be directly coated on the surface of any topological shape with polydopamine as an adhesive. Flame retardant expandable polystyrene (EPS-PAU) with light weight and high toughness is prepared with the designed PAU flame-retardant coating. The coated EPS plates exhibit V-0 UL-94 rating and 42.0 % of limited oxygen index and excellent smoke suppression. Moreover, the density of EPS-PAU is slightly increased only by 2.27 % on the basis of the neat EPS, and the hard shell formed using PDA as an adhesive layer is beneficial for the improvement of impact strength. This novel biomass-based PAU system provides a promising strategy for manufacturing polymer products with excellent flame retardancy, smoke inhibition and light weight.
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Jiachen Zhu,Lijuan Li,Lianmin Ji,Shengjie Lan,Shaojie Tao,Donghai Zhu
The preparation of high-performance epoxy resins (EP) with enhanced mechanical properties and flame retardancy for building materials has long been a significant challenge. In this study, bio-based phytic acid (PA) was intercalated into the layers of layered double hydroxides (LDH) via coprecipitation. Subsequently, ultrafine Fe(OH) 3 was in situ grown on PA-intercalated LDH through tannin-mediated assembly, resulting in the synthesis of the LDH-PA@TA-Fe(OH) 3 hierarchical hybrid flame retardant. Comprehensive characterization of its microstructure, morphology, and chemical composition was performed. The EP composite demonstrated a LOI of 31.3 % and a UL-94 V-1 rating when the additive of 7.5 wt% LDH-PA@TA-Fe(OH) 3 was utilized. Additionally, the EP/LDH-PA@TA-Fe(OH) 3 composite demonstrated a substantial reduction in peak heat release rate (pHRR) and peak smoke production rate (pSPR) with reductions of 48.1 % and 52.7 %, respectively, along with a 62.5 % decrease in peak CO production rate (pCOP), compared to neat EP. These improvements in fire safety are primarily ascribed to the synergistic flame retardancy of LDH and Fe(OH) 3 in condensed and gas phases, along with the efficient catalytic charring performance of PA and Fe 3+ . Furthermore, the incorporation of LDH-PA@TA-Fe(OH) 3 enhanced the mechanical properties of EP, which could be ascribed to the improved dispersibility of the modified LDH and the strengthened interfacial interaction. This study introduces a novel approach for the development of highly effective LDH-based hybrid flame retardant materials, enabling the fabrication of EP composites with superior mechanical performance and fire safety.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Yayun Hong,Hongli Zhao,Chenlu Pu,Qiliang Zhan,Qianying Sheng,Minbo Lan
In this work, multifunctional Ti4+-immobilized phytic acid-modified magnetic graphene (denoted as MagG@PEI@PA-Ti4+) nanocomposites were fabricated through a facile route for simultaneous/respective enrichment of N-glyco- and phosphopeptides. Phytic acid (PA), with six phosphate groups, possesses excellent hydrophilicity and metal ion coordination ability, which endowed the MagG@PEI@PA-Ti4+ with combined properties of immobilized metal ion affinity chromatography (IMAC)- and hydrophilic interaction liquid chromatography (HILIC)-based materials. On the basis of the different binding ability of N-glyco- and phosphopeptides on MagG@PEI@PA-Ti4+, the MagG@PEI@PA-Ti4+ nanocomposites could enrich N-glyco- and phosphopeptides simultaneously or respectively by using different enrichment conditions, achieving controllable selective enrichment of N-glyco- and phosphopeptides. The proposed nanocomposites demonstrated an outstanding performance for selective enrichment of N-glycopeptides (selectivity, 1:1000 molar ratios of IgG/BSA; sensitivity, 0.5 fmol/μL IgG; loading capacity, 300 mg g–1; recovery, >90%) and phosphopeptides (selectivity, 1:5000 molar ratios of α-casein/BSA; sensitivity, 0.1 fmol/μL α-casein; loading capacity, 100 mg g–1; recovery, >90%). Taking advantage of these merits, a total of 393 N-glycopeptides derived from 259 glycoproteins and 574 phosphopeptides derived from 341 phosphoproteins were identified from 200 μg of HeLa cell extracts through a single-step enrichment using MagG@PEI@PA-Ti4+.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2022
·
IF 6.556
Lingyun Gui,Beibei Chen,Zhen Zhou,Yong Liang,Man He,Bin Hu
Phytic acid (PA) functionalized magnetic adsorbents was synthesized through simple process. The functionalized sorbents are featured with core-shell structure, good magnetism, chemical stability, selectivity, and fast adsorption/desorption dynamics for the preconcentration of trace rare earth elements (REEs). With the aid of inductively coupled plasma mass spectrometry detection, the prepared Fe 3 O 4 @SiO 2 @PA sorbents were employed for the separation and enrichment of 15 REEs from environmental water and atmospheric particulates with different sizes. Under the optimal conditions, the method presented an enrichment factor of 300-fold and low detection limits (0.002–1.1 ng/L) for 15 REEs, with the relative standard deviations of 1.4–4.4%. Environmental water samples were analyzed by the proposed method, and 15 REEs of 0.08–5.80 ng/L were found in local rainwater and river water. The REEs concentration in locally collected fine particulate matter was 0.01–0.93 ng/m 3 , 0.03–1.70 ng/m 3 and 0.03–2.47 ng/m 3 of REEs were found in inhalable particulate matter and total suspended particulate samples, respectively. The bioaccessibility of REEs in PM 2.5 was evaluated by using Gamble's solution extraction, which was calculated to be 0.73–5.46%.
✓ 已验证
DOI
PubMed
高影响因子
FIRE SAFETY JOURNAL
·
2025
·
IF 3.3
Haoran Jiang,Yong Hu,Yong Jiang,Rong Qiu,Hui Huang
Due to the increased risk of phosphate depletion, there is an increasing demand for low-phosphorus or bio-based phosphorus flame inhibitors. Therefore, two novel composites with biologically-based phosphorus sources that chelate transition metal ions were synthesized via assembly method, i.e., Mn-PMC and Ni-PMC, the structure and binding states of the composites were examined by SEM, TEM, FTIR, XRD, XPS, BET and TGA. The results indicated that Mn-PMC and Ni-PMC (ⅰ) are nanoscale materials with well dispersed, (ⅱ) have an amorphous structure and have sites that bind to other substances, (ⅲ) contain no halogen elements. Then the combustion inhibition experiments of downward flame spread and TG-IR-MS analysis revealed (ⅰ) that the inhibition efficiency of the two prepared inhibitors was higher than that of commercial phosphate-containing inhibitor ADP. Among them, Ni-PMC had the best suppression effect, and the flame of cellulose sample containing it would automatically extinguish after igniting with a smallest dosage, (ⅱ) two inhibitors reduced the laminar flame velocity and flame temperature. (ⅲ) their flame suppression mechanism was indicated as that the pyrolysis releases inert gas to dilute the free radical concentration. This work is helpful for the development of efficient transition metal fire extinguishing agents to replace traditional phosphorus resources.
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 32
·11226-11237
·
IF 4.174
Zhihao Zhang,Xinjuan Li,Zhongying Ma,Haozhe Ning,Dan Zhang,Yuhua Wang
There are still some key problems in the process of the flame retardant treatment of poly vinyl alcohol (PVA): poor compatibility, deteriorating mechanical properties and potential toxicity to human health and environment. To solve these issues, a green and eco-friendly bio-based polyelectrolyte complex (PEC) formed by chitosan and phytic acid was designed to enhance the flame retardant and mechanical properties of PVA by a facile ultrasonic-assisted solution blending method. Moreover, the mechanical and flame retardant properties could be regulated by varying the ratio of each component in the PEC. Thermogravimetric analysis (TGA) indicated that after the introduction of PEC, PVA/PEC composites maintained better thermal stability and char formation ability. Besides, when the addition of PEC reached 20 wt%, the limited oxygen index (LOI) value of cured PVA increased from 18% to 25.9%, 30.8% and 35.6% for PVA/20(2 : 1) PEC, PVA/20(1 : 2) PEC and PVA/20(1 : 8) PEC, respectively. Moreover, UL-94 V-0 rating was achieved except for the PVA/20(2 : 1) PEC. Compared with pure PVA, the peak heat release rate (pHRR) and the total heat release (THR) of PVA/20(1 : 8) PEC demonstrated a sharp decrease by 69.9% and 45.5%, respectively, in the microscale combustion calorimeter measurements (MCC). These results indicate that PEC can endow PVA with excellent flame retardancy. Furthermore, the microscopic investigations on char residues of all samples by scanning electron microscopy, Fourier transform infrared spectra and Raman spectroscopy revealed the possible flame retardant mechanisms in condensed and gaseous phases. In addition, PVA/PEC composites have better mechanical properties owing to their harder backbones of chitosan, formation of phosphonate bonds and the PVA molecular chain movement blocked by PEC. As a result, the facile processing technology and eco-friendly flame retardants are expected to be applied in practice.
✓ 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）