Trial production of water-based polyurethane surgical gloves

Trial production of water-based polyurethane surgical gloves

On August 1st, the trial production of water-based polyurethane internal medicine gloves was successfully completed at Lanzhou Ketian Ankang Technology Co., Ltd., marking the industrialization of another innovative technological effect.

Unlike traditional latex gloves, the water-based polyurethane internal medicine gloves consumed by KeTian are revolutionary in both technology and experience. They are as thin as 0.1 millimeters, with a realistic touch and sensitive response, which can effectively reduce the probability of instrument use errors. Although the surgical thickness is only half of latex gloves, their puncture resistance is twice as high, and the professional test result reaches 5.8N. This is because water-based polyurethane gloves have strong flexibility and high density characteristics. Dai Jiabing said that water-based polyurethane material has high biological safety, no odor, and even if latex protein allergy sufferers wear it strangely, they will not be allergic. It can naturally fit the human body, be soft and skin friendly, easy for medical personnel to wear, and not easily slip off.

At present, the global surgical glove market is in short supply, with an annual expenditure of approximately 75 billion to 80 billion pairs of latex gloves. China's annual demand for surgical gloves is about 11 billion pairs, resulting in a significant market gap. At present, commercially available medical sterilized surgical gloves are made of natural latex, which is relatively thick and not sensitive enough for surgeons to operate, prone to allergies, and cannot effectively block viruses.

The research on adjustable function and lifespan of agricultural film has come to a halt

Recently, the annual task suspension report meeting for the national key research and development program project "Low cost manufacturing technology and industrialization of agricultural masking materials with controllable functions and lifespan" was held in Changchun. This project has achieved multiple important milestones, and the research and development and use of agricultural films in China are being carried out in the direction of multifunctionality, short lifespan, controllability, low cost, degradability, and public use.

China has the highest consumption and application of agricultural film in the world, playing an increasingly important role in developing equipment agriculture, improving resource utilization rates, and achieving high-quality and efficient consumption throughout the year. The demand for multifunctional, short-lived, and public greenhouse films for crop growth is relatively low, and the consumption cost of biodegradable film is high. The outstanding achievements of mismatch between commodity functions and crop demand, as well as difficulty in regulation, restrict the related use. Based on these achievements, led by Shandong Agricultural University, 16 units including Changchun Institute of Applied Chemistry of Chinese Academy of Sciences, Zhejiang University, Beijing Huadun Snowflake Plastic Group Co., Ltd., and Huazhong University of Science and Technology jointly conducted a seminar on "Low cost Manufacturing Technology and Industrialization of Agricultural Covering Materials with Adjustable Function and Lifespan". The team of researchers carried out collaborative innovation between industry, academia, research and application, and achieved good results.

Researchers at Changchun Yinghua Institute have customized common materials for greenhouse films, breaking through key technologies such as short lifespan, high grafting, dual light effect, enhanced coating synergistic efficiency, and low-cost manufacturing. The new product has fragmented and regulated the functions of greenhouse films, such as dripping, defogging, dust prevention, and dimming. The technological transformation of the 6000 ton/year energy-saving and high-efficiency greenhouse film consumption line has surpassed similar foreign products in some key areas of the product. Researchers have identified the light quality requirements for the cultivation of crops such as bell peppers, tomatoes, and eggplants, and developed a common greenhouse film for eggplant and fruit vegetables to improve crop quality and increase yields by 10-30%. The effect has been implemented in 5 enterprises, and the new product has been demonstrated and used on more than 80000 acres in 10 provinces and cities.

New pause in toxicity research of graphene and its derivatives

Graphene has a high specific surface area, excellent electrical, mechanical, thermal, and optical functions, and is widely regarded as a future "reactive material". In recent years, professionals in fields such as data, power, environment, and biomedicine have stopped widespread research on graphene and its derivatives, achieving many valuable results. In the field of biomedicine, the use of graphene and its derivatives is concentrated in areas such as biocompatibility, nano drug delivery systems, gene therapy, biological monitoring, biological imaging, and diagnosis.

Due to different preparation processes, the physical and chemical properties (such as size, structural shape, and external chemical morphology) of graphene and its derivatives (graphene oxide GO, etc.) are not completely opposite. Therefore, there are various ways in which graphene interacts with biomolecules, cells, tissues, and organs. At present, a small number of studies indicate that graphene is a biocompatible carbon nanomaterial.

The cytotoxicity of graphene and its derivatives is size and concentration dependent (the toxicity of graphene oxide is also related to its oxidation level), and generally exhibits good biocompatibility within a certain concentration range. When the concentration of graphene exceeds a certain limit, it will cause some adverse reactions to cells (such as cell membrane damage, decreased cell activity, etc.); In addition, graphene and GO also have certain hemolytic activity. Fortunately, modifications such as polyethylene glycol, chitosan, and protein can effectively reduce the cytotoxicity and hemolysis of graphene materials at higher concentrations.

Pure graphene and its derivatives can accumulate in the lungs of mammalian plants and persist for a long time, leading to the formation of pulmonary edema and granulation tumors, and inducing lung damage. However, research has shown that the damage can be alleviated through drug treatment, and graphene based materials modified with polymers such as polyethylene glycol, pectin, and chitosan can significantly reduce their in vivo toxicity. Studies have shown that enzyme molecules such as horseradish peroxidase and human myeloperoxidase present in organisms can cause degradation of graphene materials, greatly reducing their biological toxicity, especially temporary toxicity, making them safer and more ineffective for use in the field of biomedicine.

Unlike its good biocompatibility in cells or plants, graphene exhibits excellent antibacterial properties in its interactions with microorganisms. The antibacterial properties of graphene can be attributed to its layered structure with strong edges, and the blade like structure can cause mechanical damage to bacterial cell membranes. In addition, Tu et al. believe that graphene can indirectly extract phospholipid molecules from the cell membrane on a large scale, destroying the cell membrane and killing bacteria. The way graphene kills bacteria is significantly different from traditional antibiotics, and the use of graphene for sterilization can weaken the threat of antibiotic induced "superbugs". And the items disinfected in this way will not leave any residue on the human body during repeated use, which greatly increases the harm to the human body. For patients with weakened immune function, it is of serious significance.

The excellent biocompatibility and antibacterial properties of graphene and its derivatives make them potentially valuable in the field of biomedicine. After years of research, the study of the biological safety of graphene has accumulated a certain foundation. However, due to the diversity of graphene and its derivatives, as well as the diversity of biological fragments, further in-depth research is needed in the future use of graphene by integrating various factors.