41892-01-7Relevant articles and documents
Preparation and characterization of antibacterial films based on polyvinyl alcohol/quaternized cellulose
Hu, Dongying,Wang, Lijuan
, p. 90 - 98 (2016)
Quaternized cellulose (YM) was homogeneously synthesized by grafting 3-chloro-2-hydroxypropyldodecyldimethylammonium groups onto cellulose molecules in a NaOH/urea aqueous solution. YM was blended with a poly(vinyl alcohol) (PVA) matrix to prepare composite films via co-regeneration from the alkaline solution. The PVA film and the blend films were characterized by Fourier transform infrared spectroscopy, X-ray diffraction measurements, thermogravimetric analysis, and scanning electron microscopy. Mechanical properties, water vapor barrier properties, light transmission, and antibacterial activity against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria were also evaluated. The results reveal that PVA and YM in the composite films interacted by hydrogen bonding. Compared with pure PVA film, the PVA/YM blend films had higher tensile strength, higher thermostability, lower water permeability, and especially, higher antibacterial activity. The blend films exhibited good UV-shielding performance. Our study demonstrates a simple and efficient method for preparing a functional, environment-friendly composite film.
CATIONIC LATEX EMULSION INCLUDING DIQUATERNARY AMMONIUM SURFACTANT
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Paragraph 000103-000104; 000107-000110, (2021/08/13)
Various aspects of the present invention relate to cationic latex emulsions, methods of making the same, various materials including the cationic latex emulsion such as asphalt emulsions, and methods of making the asphalt emulsions. A cationic latex emulsion includes latex particles. The cationic latex emulsion includes an aqueous liquid emulsified with the latex particles. The cationic latex emulsion also includes a cationic surfactant that is a diquaternary ammonium surfactant.
Double electron type polymerizable surfactant monomer, and preparation method and applications thereof
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Paragraph 0029; 0030, (2019/07/04)
The invention discloses a double electron type polymerizable surfactant monomer. A preparation method comprises following steps: 1, epoxy chloropropane and a long chain tertiary amine are subjected toring-opening reaction in a hydrochloric acid solution so as to obtain an intermediate EPT; 2, EPT and N-dimethyl aminopropyl methacrylamide are subjected to quaterisation so as to obtain a finial product. The double electron type polymerizable surfactant monomer, acrylamide, acrylic acid, and 2-acrylamido-2-methylpropane sulfonic acid are subjected to polymerization, drying, crushing, and sievingat room temperature so as to obtain a polymer thickening agent powder; the polymer thickening agent powder is prepared into a 0.3wt% solution which is taken as a fracturing fluid. The preparation method is friendly to the environment; cost is low; yield and purity are relatively high; the hydrophobic associated polymer solution based on the monomer possesses excellent viscoelasticity and temperature resistance and salt resistance, so that the fracturing liquid prepared from the monomer is capable of solving technical problems in the prior art that conventional hydrophobic associated polymer fracturing liquid cost is high, and sand suspension capacity is poor.