2445-53-6Relevant articles and documents
Flexible conductive polypyrrole nanocomposite membranes based on bacterial cellulose with amphiphobicity
Tang, Lian,Han, Jinlu,Jiang, Zhenlin,Chen, Shiyan,Wang, Huaping
, p. 230 - 235 (2015)
Flexible conductive polypyrrole nanocomposite membranes based on bacterial cellulose (BC) with amphiphobicity have been successfully prepared through in situ chemical synthesis and then infiltrated with polysiloxane solution. The results suggested that polypyrrole (PPy) nanoparticles deposited on thesurface of BC formed a continuous coreshell structure by taking along the BC template. After modification with polysiloxane, the surface characteristics of the conductive BC membranes changed from highly hydrophilic to hydrophobic. The AFM images revealed that the roughness of samples after polysiloxane treatment increased along with the increase of pyrrole concentration. The contact angles (CAs) datarevealed that the highest water contact angle and highest oil contact angle are 160.3and 136.7, respectively. The conductivity of the amphiphobic membranes with excellent flexibility reached 0.32 S/cm and demonstrated a good electromagnetic shielding effectiveness with an SE of 15 dB which could be applied in electromagnetic shielding materials with self-cleaning properties. It opened a new field of potential applications of BC materials.
A simplified fabric phase sorptive extraction method for the determination of amphetamine drugs in water samples using liquid chromatography-mass spectrometry
Li, Shiying,Peng, Ju,Ruan, Xiaomeng,Song, Yiqun,Sun, Qianqian,Xing, Limei
, p. 10854 - 10866 (2020)
Fabric phase sorptive extraction (FPSE) can directly extract the target analytes and simultaneously determine many similar substances from complicated sample matrices. Also, it has very high chemical stability. Therefore, we used fabric phase sorptive extraction to analyze three amphetamine drugs (amphetamine (AM), methamphetamine (MAM), and 3,4-methylenedioxymethamphetamine (MDMA)) in water. This was coupled with ultrahigh-performance liquid chromatography and tandem mass spectrometry. The effects of different sorbent chemistries such as sorption time, ratios of back-extraction solvents, back-extraction time, and the salt effect on the extraction efficiency were studied; the optimum operation conditions were determined. Medium polarity polar polymer-coated FPSE media were created using short-chain poly (tetrahydrofuran) (PTHF). This is the most efficient extraction media for the analytes of interest. Under the optimized conditions, the linear range of the three amphetamine drugs were 0.1-150.0 (AM, MAM) and 0.5-200 ng mL-1 (MDMA). The correlation coefficients (γ) were 0.9947 (AM), 0.9925 (MAM), and 0.9918 (MDMA). The detection limits (LOD) were 0.025 ng mL-1 for AM, 0.029 ng mL-1 for MAM, and 0.01 ng mL-1 for MDMA. The corresponding limit of quantification values (LOQ) were 0.083 ng mL-1, 0.097 ng mL-1, and 0.031 ng mL-1, respectively. The recoveries were 73.4-91.6%, 82.6-95.4%, and 92.7-95.3%, respectively, and the relative standard deviations (RSD) were 1.65-6.88%, 1.38-6.11%, and 1.58-7.34%, respectively. Moreover, our method can be successfully applied for the analysis of amphetamines in wastewater samples, and at the same time, lays the foundation for the future detection of such substances.
Fiber-Treating Agent
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Page/Page column 5-6, (2008/12/08)
The present invention relates to a fiber-treating agent having a pH value of 2 to 5 at 20° C. and containing an alkoxysilane (a), an organic acid (b) and water (c), wherein 50% or more by weight of the component (a) is an alkoxysilane represented by the following formula (1): R1pSi (OR2)4-p (1) wherein R1 represents a C1 to C6 alkyl group, a phenyl group, or a C2 to C6 alkenyl group, R2 represents a C1 to C6 alkyl group, and p is an integer of 1 to 3, and the number of moles of the component (c) is 3 times or more as large as that of the component (a), as well as a method of treating fibers with the fiber-treating agent, and fibers treated by this method.