ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Cuiping Zhou,Xuan Zhao,Xiaoyun Zhao,Hui Li,Shuxiang Zhang,Wei Feng,Yongming Zhang
Realizing icephobic surfaces with low ice adhesion and durability continues to be fascinating as well as challenging. Herein, a norbornene-based fluorinated polymer (NFP) with high flexibility and high tensile strength is designed and fabricated using a fluorinated side chain and a norbornene backbone, displaying low ice shear strength less than 20 kPa and excellent durability. Experimental and theoretical analyses show that the flexibility of the polymer chains and the synergistic macromolecular aggregation of the fluorinated side groups and the norbornene backbone play key roles in the excellent surface icephobic properties of the NFP films. Moreover, we also develop a facile approach to the design of durable icephobic slippery surfaces, which possess remarkable icephobic performance. This study not only sheds light on the relationship between the polymer molecular structure and surface icephobic properties but also provides a new avenue to conveniently realize anti-icing coatings.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL PAPERS
·
2021
·Vol. 75
·期 10
·5515-5521
·
IF 2.097
Ma Yufeng,Kou Zhimin,Jia Puyou,Zhou Jing
In this paper, we synthesized two kinds of bio-based plasticizers (itaconic acid-4-propylguaiacol ester (IPE) and oleic acid-4-Propylguaiacol ester (OPE)) contained benzene groups and alkane chain groups with oleic acid, itaconic acid and 4-propylguaiacol. The performance of plasticized PVC films with IPE and OPE was investigated. The results showed that IPE played an important role as plasticizer on the tensile strength of PVC films, OPE played effect on the tensile strain of PVC films. OPE played more efficient plasticizing effect on PVC than IPE, and the tensile strain of PVC films plasticized with OPE reached 190% and was highest in all the samples. Due to the more benzene rings and ester groups in the chemical structure of IPE, which could form more hydrogen bonds and higher intermolecular interaction force between hydrogen of PVC and IPE than OPE, the compatibility of PVC and IPE was better than OPE. The plasticizing mechanism was also explored. This research would provide new ideas to design new plasticizers with the biomass resources.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
·
2024
·
IF 3.8
Hong-ying Chu,Chuan Gao,Shuai Huang,Xin-Ding Yao
DL-Isoborneol is a forestry chemical product that can serve as an intermediate in the synthesis of value-added plasticizer products. In this study, three kinds of DL-Isoborneol esters (octanoic acid-DL-Isoborneol, decanoic acid-DL-Isoborneol ester, and lauric acid-DL-Isoborneol ester [LDE]) with different fatty hydrocarbon chains were synthesized via esterification reaction. Fourier transform infrared spectrometer (FT-IR) and Nuclear magnetic hydrogen spectrum ( 1 H NMR) indicated that DL-Isoborneol esters were successfully synthesized. The oral toxicity experiment of plasticizers in mice indicated that DL-Isoborneol esters have toxic doses of 5000 mg/kg and was environmentally friendly and nontoxic. DL-Isoborneol esters were used as main plasticizers to plasticize polyvinyl chloride (PVC) and compared with commercial plasticizer dioctyl phthalate (DOP). The results showed that DL-Isoborneol esters could improve thermoplastic processing performance and thermal stability of plasticized PVC than DOP. DL-Isoborneol esters and PVC showed more excellent compatibility compared with DOP. T g of plasticized PVC reached 22°C, tensile strength and elongation at break of PVC plasticized with 40 wt% LDE reached 12.90 ± 0.83 MPa and 342 ± 13%, respectively. DL-Isoborneol esters with improved migration resistance performance and plasticization efficiency can completely replace DOP as main plasticizers for PVC. Highlights DL-Isoborneol esters with different fatty hydrocarbon chains were synthesized. DL-Isoborneol esters have toxic doses of 5000 mg/kg and are nontoxic. DL-Isoborneol esters can be used as main plasticizer for PVC. Plasticized PVC with improved processability. DOP can be completely replaced by DL-Isoborneol esters.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Dan Wei,Kai Ma,Lei Ni,Ahmed Mebarki,Gang Fu,Juncheng Jiang
Traditional batch peroxyester synthesis processes pose a significant risk due to the presence of thermally unstable substances and highly exothermic nature of the reactions, highlighting the urgent need for a shift toward greener processes. With the aim to enhance safety of this process, a batch-to-flow transition was conducted, taking acid-catalyzed acylation of pivalic anhydride (PAn) with tert -butyl hydroperoxide (TBHP) to synthesize tert -butyl peroxypivalate (TBPP) as a case study. The acylation mechanism was investigated through density function theory calculation as well as in situ IR characterization. It was demonstrated that PAn first reacts with sulfuric acid to form pivalic acid sulfate, which subsequently undergoes nucleophilic attack by TBHP, yielding the corresponding peroxyester. The effects of process conditions, including reaction temperature, dosing rate, stirring rate and molar ratio, on thermal hazards in the semi-batch reactor was assessed. Under this mode, the processes which gained high yields (>90 %) showed unacceptable thermal runaway hazards. Then, the reaction was carried out under flow conditions. The process was optimized based on multi-objective Bayesian optimization. Through the batch-to-flow transition, it was showcased that the thermal runaway hazard could be reduced from severe (Class V) to moderate (Class II) along with a 74-fold increase in space-time yield. Furthermore, to distinguish the thermal risks quantitatively under different conditions in flow, a risk factor (R-factor) was proposed for the first time as a safety metric. With the application of R-factor, safety-oriented optimization in flow was made possible and sustainable synthesis processes could be realized.
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Guangzeng Luo,Zhilu Gao,Cuiping Zhou,Yintan Huang,Shuangshuang Hu,Yifan Hu,Chuanyong Zong,Lan Lei,Hui Li
Well-tailored construction of icephobic surfaces with mechanical robustness and investigation of the structure–property relationships at the molecular level are highly desirable. Herein, a series of norbornene-based fluorinated polyolefin copolymers (FPOR-x) with varying norbornenyl dodecafluoroheptyl ester (NDFHE) molar fractions (0–100 mol %) were well-designed and fabricated via living ring-opening metathesis polymerization (ROMP) employing NDFHE and norbornenyl pentafluorophenyl ester (NPFPE) as the soft and hard segments, respectively. The mechanical and icephobic properties of the fluorinated copolymers can be regulated by adjusting the soft NDFHE contents. As a result, the well-designed norbornene-based copolymers exhibited a wide range of tunable mechanical properties, including tensile strength ranging from 0.2 to 26.4 MPa, elastic modulus ranging from 0.6 to 593.7 MPa, and breaking elongations ranging from 5718.7% to 3.7%, correlating with the proportion of soft NDFHE content. Furthermore, the synergistic interplay between soft and hard segments, particularly the hardness in the majority and softness in the minority or vice versa, could achieve a significant difference in the local modulus and enhance the propagations of cracks within the three-phase regions (soft regions/hard regions/ice), ultimately leading to a significant reduction in ice shear strength. Notably, FPOR-25% with a tensile strength of 12.0 MPa and an elastic modulus of 227.5 MPa exhibited a remarkably low ice shear strength of 57.7 kPa. This study not only highlights the relationship between the polymer molecular structure and surface icephobic properties but also breaks the limitations of icephobic surfaces with a low modulus.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Guangzeng Luo,Feng Xu,Kai Gong,Zhilu Gao,Qianqian Hou,Yintan Huang,Shuangshuang Hu,Chuanyong Zong,Lan Lei,Hui Li
Developing smart organogels with simultaneous low ice adhesion, high mechanical strength, and durability through a simple method has proven to be challenging yet valuable. In this work, organogels (NF-x) possessing variable liquid paraffin contents (0–50 wt %) with fluorinated polynorbornene networks were produced by ring-opening metathesis polymerization (ROMP) using norbornene-trifluoroethyl ester (NF) and dinorbornyl glycol ester (NEG) as monomer and cross-linking agent, respectively. The stability, mechanical behavior, anti-icing, and antifrosting properties were comprehensively investigated. Owing to the well-designed networks, the organogels exhibited excellent stability even under harsh conditions for long-term use. Unprecedentedly, they showed a reversible pressure-responsive effect, wherein the paraffin could migrate from the inside of the gels to form a self-lubricating layer covering the surface under external force and subsequently reabsorbed and recovered to the original state upon force removal, enhancing the on-demand secretion of lubricants to the surface. The sensitivity to the applied force (merely 4 kPa of NF-5) was positively correlated with the paraffin content in the organogels. Benefiting from the fluorinated polynorbornene networks and switchable self-lubricating property, the organogels showed excellent durability in mechanical, anti-icing, and antifrosting properties. Additionally, the mechanical, anti-icing, and antifrosting properties could be adjusted by varying the paraffin content. Notably, the NF-5 ice-phobic coating with 50 wt % paraffin exhibited high mechanical strength (1.69 MPa) and low ice shear strength (17.65 kPa), even after 15 icing–deicing cycles, remaining below 28 kPa. This study offers an approach to conveniently develop smart anti-icing materials with high mechanical durability.
✓ 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）