具有触觉收缩标签的可收缩聚氯乙烯薄膜的弛豫过程（英文）

Introduction The falsification of industrial consumer goods and the emergence of counterfeit productions are important dangerous economic problems of brand manufacturers in many developed countries.The methods of falsification of counterfeit goods and production of various kinds of counterfeit are based on the substitution of true goods for not

Biomaterial types,properties,medical applications,and other factors:a recent review

Biomaterial research has been going on for several years,and many companies are heavily investing in new product development.However,it is a contentious field of science.Biomaterial science is a field that combines materials science and medicine.The replacement or restoration of damaged tissues or organs enhances the patient’s quality of life.The deciding aspect is whether or not the body will accept a biomaterial.A biomaterial used for an implant must possess certain qualities to survive a long time.When a biomaterial is used for an implant,it must have specific properties to be long-lasting.A variety of materials are used in biomedical applications.They are widely used today and can be used individually or in combination.This review will aid researchers in the selection and assessment of biomaterials.Before using a biomaterial,its mechanical and physical properties should be considered.Recent biomaterials have a structure that closely resembles that of tissue.Antiinfective biomaterials and surfaces are being developed using advanced antifouling,bactericidal,and antibiofilm technologies.This review tries to cover critical features of biomaterials needed for tissue engineering,such as bioactivity,self-assembly,structural hierarchy,applications,heart valves,skin repair,bio-design,essential ideas in biomaterials,bioactive biomaterials,bioresorbable biomaterials,biomaterials in medical practice,biomedical function for design,biomaterial properties such as biocompatibility,heat response,non-toxicity,mechanical properties,physical properties,wear,and corrosion,as well as biomaterial properties such surfaces that are antibacterial,nanostructured materials,and biofilm disrupting compounds,are all being investigated.It is technically possible to stop the spread of implant infection.

Mechanical and thermal properties of sodium silicate treated moso bamboo particles reinforced PVC composites

The main objective of this research was to study the potential of sodium silicate modification on moso bamboo particles as reinforcements for thermoplastic. Moso bamboo particles were modified with sodium silicate aqueous solutions (of 0.5%, 1%, 2%, 5% and 10% concentrations). The mechanical properties of sodium silicate treated moso bamboo particles reinforced PVC composites (BPPC) were calculated and compared with raw bamboo particles filled samples. The thermal characteristics of the BPPC were studied to investigate the feasibility of sodium silicate treatment on moso bamboo particles. The particle morphology and BPPC microstructure were investigated by scanning electron microscopy. Results showed that the tensile strength and modulus of elasticity of the BPPC increased before the concentration of sodium silicate solution reached 5% and got their maximum values of 15.72 MPa and 2956.80 MPa, respectively at 5% concentration. The modulus of rupture obtained the maximum value of 27.73 MPa at 2% concentration. The mechanical curve decreased as the concentration of solution went higher. Differential scanning calorimetric analysis illustrated that the sodium silicate solution treated BPPC possesses a better compatibility. More uniform dispersion of moso bamboo particles in PVC matrix was obtained after the sodium silicate treatment. Hence, the sodium silicate was a feasible and competitive agent of creating moso bamboo particles reinforced PVC composites.

Hydrophilic polymer-coated PVC surface for reduced cell and bacterial adhesions

Hydrophilic polymers are very useful in biomedical applications.In this study,biocom-patible polyethylene glycol(PEG)and polyvinylpyrrolidone(PVP)polymers end-capped with succinimidyl groups were either modified or synthesised and attached to poly-vinylchloride surfaces.The modified surfaces were evaluated with cell adhesion and bacterial adhesion.3T3 mouse fibroblast cells and three bacteria species were used to evaluate surface adhesion activity.Results showed that the modified surface exhibited significantly reduced 3T3 cell adhesion with a 50%-69%decrease for PEG and a 64%-81%for PVP,as compared to unmodified polyvinylchloride.The modified surface also showed significantly reduced bacterial attachment with 22%-78%,18%-76%and 20%-75%decrease for PEG and 22%-76%,18%-76%and 20%-73%for PVP to Staphy-lococcus aureus,Escherichia coli and Pseudomonas aeruginosa,respectively,as compared to unmodified polyvinylchloride.It seems that an appropriate chain length or molecular weight(neither the longest nor the shortest chain length)determines the lowest cell and bacterial adhesion in terms of PEG.On the other hand,a mixture of polymers with different chain lengths exhibited the lowest cell and bacterial adhesion in terms of PVP.