Hobaneng ha silicone ea metsi e ka sebelisoa haholo makaleng a fapaneng?

1. Kenyelletso ea rabara ea silicone e nang le metsi e nang le molding ea tlatsetso

rabara ea silicone e nang le mokelikeli oa tlatsetso e entsoe ka vinyl polysiloxane e le polymer ea mantlha, polysiloxane e nang le bond ea Si-H e le sehokela sa sefapano, ka pel'a sesebelisoa sa platinum, mocheso oa kamore kapa ho futhumatsa tlas'a sefapano se hokahanyang vulcanization ea sehlopha sa silicone. lisebelisoa.E fapane le rabara ea silicone ea mokelikeli o mokelikeli, mokhoa oa ho bopa oa silicone vulcanization ha o hlahise lihlahisoa, shrinkage e nyane, vulcanization e tebileng mme ha ho kutu ea thepa ea ho ikopanya.E na le melemo ea mefuta e mengata ea mocheso, khanyetso e ntle ea lik'hemik'hale le ho hanyetsa boemo ba leholimo, 'me e ka khomarela habonolo libakeng tse sa tšoaneng.Ka hona, ha ho bapisoa le silicone ea mokelikeli o khutsitseng, nts'etsopele ea mold ea silicone ea metsi e potlakile.Hajoale, e se e sebelisoa haholo lisebelisoa tsa elektroniki, mechini, kaho, bongaka, likoloi le masimong a mang.

2.Likaroloana tse ka Sehloohong

Polymer ea motheo

Li-polysiloxane tse peli tse latelang tse nang le vinyl li sebelisoa e le li-polymers tsa motheo bakeng sa ho eketsoa ha silicone ea metsi.Kabo ea bona ea boima ba limolek'hule e pharaletseng, hangata ho tloha ho likete ho isa ho 100,000-200,000.Polymer ea motheo e sebelisoang haholo bakeng sa silicone e eketsang metsi ke α,ω -divinylpolydimethylsiloxane.Ho ile ha fumanoa hore boima ba limolek'hule le li-vinyl tsa li-polymers tsa motheo li ka fetola thepa ea silicone ea metsi.

ntho e kopanyang

Mokelikeli oa crosslinking o sebelisetsoang ho eketsa mokelikeli oa silicone ke organic polysiloxane e nang le li-bond tse fetang 3 tsa Si-H ka molek'hule, tse kang linear methyl-hydropolysiloxane e nang le sehlopha sa Si-H, ring methyl-hydropolysiloxane le MQ resin e nang le sehlopha sa Si-H.Tse sebelisoang haholo ke linear methylhydropolysiloxane tsa sebopeho se latelang.Ho fumanoa hore thepa ea mechine ea gel ea silika e ka fetoloa ka ho fetola dikahare tsa hydrogen kapa sebopeho sa motsoako oa sefapano.E fumane hore litaba tsa haedrojene tsa motsoako oa crosslinking li lekana le matla a thata le boima ba gel ea silica.Gu Zhuojiang et al.e fumane oli ea silicone e nang le haedrojene e nang le sebopeho se fapaneng, boima ba limolek'hule tse fapaneng le litaba tse fapaneng tsa haedrojene ka ho fetola ts'ebetso ea motsoako le foromo, 'me ea e sebelisa e le ntho e kopanyang ho kopanya le ho eketsa silicone ea metsi.

catalyzer

E le ho ntlafatsa ts'ebetso ea ts'ebetso ea li-catalysts, li-platinum-vinyl siloxane complexes, li-platinum-alkyne complexes le li-platinum tse fetotsoeng ka naetrojene li ile tsa lokisoa.Ntle le mofuta oa li-catalyst, bongata ba lihlahisoa tsa silicone tsa metsi le tsona li tla ama ts'ebetso.E fumane hore ho eketsa khatello ea platinum catalyst ho ka khothalletsa karabelo ea ho hokahanya pakeng tsa lihlopha tsa methyl le ho thibela ho senyeha ha ketane e kholo.

Joalokaha ho boletsoe ka holimo, mochine oa vulcanization oa silicone ea setso sa motsoako oa motsoako ke karabelo ea hydrosilylation pakeng tsa polymer ea motheo e nang le vinyl le polymer e nang le bond ea hydrosilylation.Mokhoa o tloaelehileng oa motsoako oa silicone oa mokelikeli hangata o hloka hlobo e thata ho etsa sehlahisoa sa ho qetela, empa theknoloji ena ea setso ea tlhahiso e na le mefokolo ea litšenyehelo tse phahameng, nako e telele, joalo-joalo.Hangata lihlahisoa ha li sebetse lihlahisoa tsa elektroniki.Bafuputsi ba fumane hore letoto la li-silicas tse nang le thepa e phahameng li ka lokisoa ka mekhoa e mecha ea ho folisa e sebelisang mercaptan - li-silicas tsa metsi tse kopanyang habeli.Thepa ea eona e babatsehang ea mechine, botsitso ba mocheso le phetisetso ea khanya e ka etsa hore e sebelisoe masimong a macha.Ho ipapisitsoe le karabelo ea bond ea mercapto-ene lipakeng tsa branched mercaptan functionalized polysiloxane le vinyl e felisitsoeng polysiloxane e nang le boima bo fapaneng ba limolek'hule, ho ile ha lokisoa li-elastomer tsa silicone tse nang le boima bo ka feto-fetohang le thepa ea mochini.Li-elastomer tse hatisitsoeng li bonts'a qeto e phahameng ea khatiso le thepa e ntle haholo ea mochini.Bolelele ba nako ea khefu ea li-silicone elastomers bo ka fihla ho 1400%, e leng e phahameng haholo ho feta e tlalehiloeng ka li-elastomers tsa UV tse phekolehang ebile e phahame ho feta li-elastomer tsa silicone tse atolohang ka ho fetisisa.Ebe li-elastomer tsa silicone tse otlollehang li ile tsa sebelisoa ho li-hydrogel tse tšetsoeng ka carbon nanotubes ho lokisa lisebelisoa tsa elektroniki tse otlohang.Silicone e ka hatisoang le e ka sebetsoang e na le tebello e pharaletseng ea ts'ebeliso ho liroboto tse bonolo, li-activator tse tenyetsehang, li-implants tsa bongaka le likarolo tse ling.