Synthesis of AzPhchitosan-bifenthrin-PVC to protect cables against termites

Zhang, Lingkun; Cai, Weiwei; Chen, Wuya; Zhang, Li; Hu, Kaikai; Guan, Yan‐Qing

doi:10.1016/j.carbpol.2015.11.075

Cited by 13 publications

(6 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As insects with relatively advanced evolution, termites cause irreversible harm to buildings, gardens, trees, water conservancy projects, transportation facilities, and telecommunication equipment. 3 Termite damage is mainly reflected in the following aspects:…”

Section: Introductionmentioning

confidence: 99%

“…In the United States, economic losses due to termite hazards exceed 3 billion dollars per year. As insects with relatively advanced evolution, termites cause irreversible harm to buildings, gardens, trees, water conservancy projects, transportation facilities, and telecommunication equipment . Termite damage is mainly reflected in the following aspects: (1) eating a variety of field crops, trees, and fruit trees, as well as flower seedlings, resulting in reduced or even no yield; (2) damaging buildings, eventually resulting in the sudden collapse of buildings, endangering the safety of human life and property; , and (3) the damage of termites to soil dikes is the most critical in water conservancy projects.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

pH-Responsive ZIF-8-Based Metal–Organic-Framework Nanoparticles for Termite Control

Zhao

Shang

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Pesticides are the primary defending strategy against major biological invaders and important for ensuring national food security. Intelligent nanopesticides with precise controlled release modes are currently an emerging area of interest in the field of green, safe, and sustainable pesticide formulation. In this study, βcypermethrin (β-CYP) was loaded into ZIF-8 by the one-pot method, which successfully prepared a pH-responsive delivery nanoparticle (β-CYP/ZIF-8) to control termites. Results demonstrated that β-CYP/ZIF-8 had a mean diameter of 188 ± 2 nm and a loading capacity of approximately 21%. In vitro release experiments showed that β-CYP/ZIF-8 releases better in acidic than in neutral conditions due to the presence of intermediate acidunstable imidazole organic compounds. The acidic microenvironment in which termites thrive can promote β-CYP release due to ZIF-8 decomposition, thus improving pesticide targeting and reducing toxic side effects. The bioactivity survey confirmed that β-CYP/ZIF-8 could control termites (Coptotermes formosanus Shiraki) for a longer duration compared to commercial wettable powder (WP) and emulsifiable concentrate (EC). Moreover, an acute toxicity test showed an over 2-and 10-fold reduction in the acute toxicity of β-CYP/ZIF-8 to earthworms and zebrafish, respectively, compared to that of commercial WP and EC. Finally, the cytotoxicity assay of β-CYP/ZIF-8 showed higher safety to human hepatocyte LO2 cells. Overall, these β-CYP/ZIF-8 nanoparticles, prepared using the one-pot method, have great application potential in sustainable pest management and protection of the ecological environment.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

pH-Responsive ZIF-8-Based Metal–Organic-Framework Nanoparticles for Termite Control

Zhao

Shang

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…The incorporation of AgNPs in chitosan aiming to produce antibacterial nanocomposites has produced a substantial number of publications 16,17 . Hitherto, there are a few numbers of research studies on the synthesis of covalently bonded Cs‐PVC conjugates 18,19 …”

Section: Introductionmentioning

confidence: 99%

“…16,17 Hitherto, there are a few numbers of research studies on the synthesis of covalently bonded Cs-PVC conjugates. 18,19 In the field of medical applications, most devices used are often manufactured from synthetic polymers, which are commonly called medical polymers. To choose a specific polymer for manufacturing medical devices, certain parameters should be fulfilled such as biocompatibility, cost-effectiveness, mechanical flexibility, ability to continued sterilization procedures and low environmental impact after consumption.…”

mentioning

confidence: 99%

Chitosan‐PVC conjugates/metal nanoparticles for biomedical applications

Abdel-Monem

Rabie

El‐Liethy

et al. 2021

Polymers for Advanced Techs

View full text Add to dashboard Cite

Four chitosan-poly(vinyl chloride), Cs-PVC, conjugates were synthesized by primarily reacting amino-PVC with chloroacetyl chloride to give 2-chloro-N-(2-aminoethyl) acetamide-functionalized PVC (PVC-AcCl) followed by conjugation with chitosan to yield a derivative of acetamide-functionalized PVC chitosan (Cs-AcPVC). On the other hand, a one-pot reaction between PVC-chloroacetyl chloride, benzimodazole, and chitosan produced benzimodazole-functionalized PVC conjugates (PVC1). The above one-pot reaction was repeated with incorporating silver nanoparticles, AgNPs, via in situ reduction of Ag salt to give PVC2 whereas silver treated titanium dioxide (Ag/TiO 2 )NPs was simply mixed with PVC1 to afford PVC3. Fourier-transform infrared spectroscopy FTIR spectroscopic analyses of all the synthesized materials were studied. Morphological investigation such as scanning and transmission electron microscopy, and thermal gravimetric analysis were also carried out. The antibacterial activities of the synthesized conjugates were investigated against two Gram-negative (Escherichia coli, and Salmonella typhimurium) and two Gram-positive (Staphylococcus aureus, and Listeria monocytogenes) bacterial strains. The antibacterial assay showed that all PVC-Cs conjugates exhibited excellent bacterial inhibition (five-log10 reduction) at a concentration of 500 mg/L after 30 min and almost complete inhibition after 120 min. Minimum inhibition concentration investigation showed that conjugates PVC-chloroacetyl chitosan and PVC3 were more potent than PVC1 and PVC2 against both Gram-negative and Gram-positive strains at 250 mg/L. These results suggested that all four polymeric conjugates might afford a revolutionary antibacterial polymeric material that can be useful in many applications such as water sanitization, food packaging, and biomedical devices.

show abstract

“…Poly(vinyl chloride) (PVC), an indispensable plastic material, is wildly used in industry, agriculture, architecture, household items, and medicine for its virtue of chemical resistance, abrasion resistance, electrical insulator, sound/thermal insulation, and mature production technology. − The global PVC consumption is expected to be 49.5 million tons in 2020 and grows sustainably with a rate of 4.9% per annum . However, because of its intrinsic composition and structural features, PVC suffers from rapid dehydrochlorination reaction and the subsequent HCl-catalytic degradation reaction under heat or ultraviolet (UV) light radiation, as well as the so-generated deterioration of esthetic and mechanical properties. − Therefore, the addition of thermal or UV stabilizers is indispensable for enhancing the stability of PVC materials.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Enhancements of Ultraviolet-Shielding Properties and Thermal Stability/Photostability of Poly(vinyl chloride) via Incorporation of Defect-Rich CeO₂ Nanoparticles

Wang

Zhang

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

In the present work, CeO2 nanoparticles with abundant surface defects and controlled particle size were synthesized by separate nucleation and aging steps followed by a calcination treatment and applied as a multifunctional additive for the preparation of a PVC–CeO2 composite film. The characterization results demonstrated that the as-prepared PVC–CeO2 composite film could completely block UV-C, 98.6% UV-B, and more than 50% UV-A with high transparency in visible light; meanwhile, its initial pyrolysis temperature could be put off by 16 °C compared to that of pristine PVC. Density functional theory calculations and experimental results revealed that the enhanced thermal stability/photostability of PVC–CeO2 composite films is mainly attributed to the close interaction and good compatibility between the CeO2 nanoparticle and PVC matrix, enhanced HCl-capture capability of highly dispersed CeO2 nanoparticles, and the formation of the coordinate complex between Ce atoms in defect-rich CeO2 and labile Cl atoms in PVC main chains. Furthermore, the excellent UV absorption capacity of CeO2 nanoparticles could endow the PVC–CeO2 composite film with significantly improved UV-shielding efficiency. This work provides a new clue for the rational design and synthesis of rare earth-based additives, which are expected to be used in polymers, especially in PVC-based functional materials.

show abstract

Synthesis of AzPhchitosan-bifenthrin-PVC to protect cables against termites

Cited by 13 publications

References 32 publications

pH-Responsive ZIF-8-Based Metal–Organic-Framework Nanoparticles for Termite Control

pH-Responsive ZIF-8-Based Metal–Organic-Framework Nanoparticles for Termite Control

Chitosan‐PVC conjugates/metal nanoparticles for biomedical applications

Simultaneous Enhancements of Ultraviolet-Shielding Properties and Thermal Stability/Photostability of Poly(vinyl chloride) via Incorporation of Defect-Rich CeO₂ Nanoparticles

Contact Info

Product

Resources

About

Synthesis of AzPhchitosan-bifenthrin-PVC to protect cables against termites

Cited by 13 publications

References 32 publications

pH-Responsive ZIF-8-Based Metal–Organic-Framework Nanoparticles for Termite Control

pH-Responsive ZIF-8-Based Metal–Organic-Framework Nanoparticles for Termite Control

Chitosan‐PVC conjugates/metal nanoparticles for biomedical applications

Simultaneous Enhancements of Ultraviolet-Shielding Properties and Thermal Stability/Photostability of Poly(vinyl chloride) via Incorporation of Defect-Rich CeO2 Nanoparticles

Contact Info

Product

Resources

About

Simultaneous Enhancements of Ultraviolet-Shielding Properties and Thermal Stability/Photostability of Poly(vinyl chloride) via Incorporation of Defect-Rich CeO₂ Nanoparticles