34results about How to "Degradation has" patented technology

The invention discloses formaldehyde degradation spray for Chinese herbal components, and belongs to the technical field of air purifying. The formaldehyde degradation spray for the Chinese herbal components comprises wormwood, radix aristolochiae, dogwood, longan, cassia seed, madder, pseudo-ginseng, lithospermum, aloe, seed of Chinese dodder, honeysuckle, eupatorium, dried tangerine or orange peel and fructus forsythia. The formaldehyde degradation spray for the Chinese herbal components not only can effectively degreade formaldehyde in air, but also can enable air to be fresh and fragrant, so that the environment is improved, the fatigue is relieved, physical and mental pleasure further can be realized, the working and learning efficiency is improved, and the use is convenient.

The invention discloses a pH-sensitive biodegradable polyurethane-urea material and a preparation method thereof. The polyurethane-urea is pH-sensitive biodegradable polyurethane-urea prepared by mixing dihydroxy-terminal polyether ester with N,N-bis(2-ethoxy) 4-pyridinccarbox amide, carrying out chain expansion by using carbamido-containing diisocyanate and purifying; the polyether ester is usedas a main soft segment, a chain segment containing carbamido and urethane group is used as a hard segment and a pyridine ring is positioned on a side chain. The polyurethane-urea has the characteristics of biodegradability, absorbability of a degradation product, pH sensitivity, high expanding and degrading rate in acidic mediums, as well as basically no expansion and low degrading rate in neutraland alkaline mediums; in addition, the pH sensitivity is not basically affected by temperature and can be applied to the field of controlled release as a drug carrier, and further the drug release rate is controlled according to pH values of different parts of an organism. The hard segment formed by carbamido-containing structure diisocyanate contains dense hydrogen bonds, so that the mechanicalproperty of the material is improved.

The invention belongs to the field of functional fiber materials, and discloses a traditional Chinese medicine composite anti-virus multifunctional degradable polylactic acid fiber and a preparation method thereof. The starch fermentation raw material is fermented and extracted to obtain lactic acid, and then dehydrated and condensed to obtain a lactic acid prepolymer, and then added to an extruder with functional nanoparticles and a catalyst to melt, mix and polycondense to obtain functional polylactic acid, which is then spun and formed to obtain a product. The functional nanoparticles are obtained by absorbing the antiviral components of traditional Chinese medicine by adopting porous silicon dioxide and inorganic nanometer powder materials surface-modified by a silane coupling agent. The invention effectively couples the functional modification of the polylactic acid fiber with the upstream fiber polymerization, significantly simplifies the process steps and reduces production energy consumption, and has better mixing and dispersing effect and stability. At the same time, the inorganic antibacterial health function and the antiviral function of traditional Chinese medicine are integrated into the same particle, which can simultaneously exert antibacterial, antiviral and health care functions. The obtained functional fiber has the advantages of environmental protection, degradability and recycling.

The invention discloses a coated degradation type slow release potassium fertilizer which is formed by coating a granular potassium fertilizer with a coating material, wherein the coating material occupies 2-6 percent of mass of the potassium fertilizer and is 60-140 mum in thickness; the coating material is prepared by the following method which comprises the following steps: (1) modifying soybean oil and obtaining soybean oil oligomer; (2) modifying starch and obtaining liquid starch; (3) mixing the soybean oil oligomer and the liquid starch, obtaining a mixture, then mixing with polyester resin and reacting into a film so as to obtain the coating material; the slow release period of the coating material is 30-130 days, and the coating material can be completely degraded within two years and has no residue and no pollution to the environment. The coated degradation type slow release potassium fertilizer disclosed by the invention has the advantages of degradability, low cost, long slow release period, nontoxicity, innocuity and the like.