Starch ring-opening grafted polylactic acid, preparation method and application thereof in biodegradable condoms

Abstract

The invention discloses a starch ring-opening grafted polylactic acid, a preparation method and application thereof in biodegradable condoms. The method includes: firstly utilizing at least 50% content of hydroxyl in each glucose unit of starch to link a silane agent to obtain most hydroxyl silylated starch, then utilizing the hydroxyl not linked to silane in the glucose units of starch to initiate the ring-opening polymerization reaction of lactide, then subjecting the starch to opening-ring grafting of polylactic acid, then conducting acid elution for regeneration of the silane agent protected hydroxyl, thus finally obtaining the completely biodegradable starch ring-opening grafted polylactic acid polymer containing glucose units. The product prepared by the method provided by the invention has good compatibility, film-forming property, wettability, viscosity, dispersibility, etc. Condoms prepared from the starch ring-opening grafted polylactic acid have better tensile strength, blasting volume and barrier properties, and more comfortable use experience, not only have stable mechanical properties, but also have complete biodegradability, thus reflecting the renewable environmental protection advantage.

Description

technical field [0001] The invention relates to the technical field of organic polymer materials, in particular to a starch ring-opening grafted polylactic acid, a preparation method thereof and an application in a biodegradable condom. Background technique [0002] Condom is one of the tools to prevent conception in non-drug form, and it can also effectively prevent the transmission of pathogens such as sexually transmitted diseases and AIDS. Therefore, the condom has a double protection function, which can not only effectively prevent pregnancy, but also prevent diseases that are transmitted through sexual behavior, prevent infection, and bring people a pleasant and free sexual experience. Therefore, condoms are also called condoms, condoms, wishful sets, etc. As a simple and effective physical isolation contraceptive method, they are promoted and used by governments all over the world. With the rapid development of China's economy, the living standards of ordinary people...

AI Technical Summary

Problems solved by technology

Natural latex is currently the most widely used condom material, but natural latex condoms have their own shortcomings: low thermal conductivity, easy oxidation, poor oil resistance and solvent resistance; the material contains ingredients such as allergic water-soluble proteins, which are easy to use Some consumers have allergic reactions such as erythema and itching, which cause strong discomfort reactions; during the vulcanization process, strong carcinogens such as nitrosamines are also produced

However, many condoms reported so far are not completely biodegradable materials. Judging from the annual usage of condoms, this is bound to become another huge "white garbage", polluting our living environment and harming human beings. health is also greatly affected