44results about How to "Has a surface effect" patented technology

The invention provides a lac wax nano emulsion and a preparation method thereof. The lac wax emulsion comprises lac wax, Tween-80, Span-80, triethanolamine and water. The preparation method comprises the following steps: 1) evenly mixing the Tween-80, Span-80 and triethanolamine to obtain a compound emulsifying agent; 2) adding the compound emulsifying agent to the molten lac wax, and evenly stirring; and 3) adding water, and stirring to obtain the lac wax emulsion. The lac wax emulsion provided by the invention has a small particle diameter, and the dispersibility, storage stability, centrifugal stability and freezing and thawing stability are satisfactory and can meet the Level 1 national standards. The preparation method of the emulsion is simple, and is suitable for large-scale popularization and application.

The invention discloses a preparation method of a nano-biosensor for differentiating sensitive and drug-resistant cancer cells, comprising: the first step, generating hydroxyl groups on the electrode surface: firstly polishing the electrode to the mirror surface, and respectively washing them in acetone, absolute ethanol, ultrapure Wash it in water, dry it, put it in phosphate buffer solution (PBS) with a pH of 5.0, and treat it with an electrochemical multi-potential step method. After the treatment, it will be scanned continuously by cyclic voltammetry. Washing and drying; the second step, nanoparticle modification: mix the aqueous solution of functionalized metal nanoparticles or polymer nanofibers at a volume ratio of 1:1 and pH=7.2, 0.1mol / l HEPES buffer, and then add 0.5 mg of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and mix evenly. Finally, soak the electrode pretreated in the first step in the modification solution, and it will be ready after 10 hours. Get nano biosensors. Sensitive and drug-resistant cancer cells can be distinguished by electrochemical methods or by measuring the contact angle of different cancer cells on the surface of the sensor by using the nano-biosensor.

The invention provides a cross-linked three-dimensional network ultrafine oil-absorbing fiber, which is an ultrafine oil-absorbing fiber based on EPDM rubber, including fiber and oil-absorbing felt, oil-absorbing blanket, oil-absorbing sheet or oil-absorbing film made of such fiber, fiber The diameter is from 200nm to 5000nm. The preparation includes: (1) configuration of spinning stock solution; (2) defoaming; (3) preparation of nanofibers by electrospinning; (4) putting the obtained fibers into a vacuum oven and drying them in vacuum; (5) preparation by microwave radiation technology Three-dimensional mesh oil-absorbing fiber material. The cross-linked three-dimensional network superfine oil-absorbing fiber of the present invention has broad application prospects in various fields such as oil-absorbing materials, filter materials, slow-release substrates and the like.