According to Xinhua News Agency, a few days ago, Chinese and American researchers used the "molecular stitching technology" developed by Harvard University's Lock Zhigang team to apply a polymer solution to two types consisting of a hydrophilic three-dimensional network and a large amount of water. The soft and wet materials are cross-linked into a network by the triggering of ferric ions, thereby "stitching" the material. This new type of tape, which strongly binds hydrogels and body tissues, can be easily removed under UV light “non-invasive and painless†and can be used in future wound dressings, skin administration and the manufacture of wearable robots.
Dr. Gao Yang, State Key Laboratory of Mechanical Structure Strength and Vibration, Xi'an Jiaotong University, China, said that the trivalent iron ions coordinated by the sutured polymer were reduced to divalent iron ions by ultraviolet light irradiation, which led to the suture network de-crosslinking and re-solution. So that strong bonding is effectively removed.
The researchers also hope that in the future, near-infrared light can be used to "uncover" the tape and explore more medical applications.
The research results have been published in the American Journal of Advanced Materials.
Anti Bird Net
Anti-bird net is a kind of polyethylene, high-density polyethylene, polypropylene and nylon which are added with anti-aging and anti-ultraviolet chemical additives. It is a kind of plastic woven mesh and anti bird net has the advantages of high tensile strength, heat resistance, water resistance, corrosion resistance, aging resistance, non-toxic and tasteless, and easy disposal of waste. It can kill common pests such as flies and mosquitoes. The conventional use of the collection is light, and the correct storage life can reach 3-5 years.
Bird-proof net cover cultivation is a new environmentally-friendly agricultural technology that increases production and practicality. It builds artificial isolation barriers on the scaffolding, rejects birds outside the net, cuts off bird breeding routes, and effectively controls various types of birds. Spread and prevent the spread of viral diseases. And it has the functions of light transmission and moderate shading to create favorable conditions for crop growth.
The bird-proof net also has the function of resisting natural disasters such as storm erosion and hail attack.
Beyond garden, the anti bird net also be used in airport, building, residential houses, etc.
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