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Nibihe bintu byiza byamavuta ya silicone tutazi?

Ibicuruzwa byinshi mubuzima bikomatanyirizwa mubicuruzwa bivura imiti. Ibicuruzwa bikoresha ibyiza byabyo kugirango dukoreshe. Amavuta ya silicone mubisanzwe yerekeza kumurongo wa polysiloxane igumana ibintu byamazi mubushyuhe bwicyumba. Mubisanzwe ni ibara (cyangwa umuhondo wijimye), impumuro nziza, idafite uburozi, amazi adahindagurika, adashonga mumazi, methanol, Ethylene glycol, kandi bihuye na benzene. , Dimethyl ether, karubone tetrachloride cyangwa kerosene birashobora gukemuka, bigashonga gato muri acetone, dioxane, Ethanol na butanol. Reka menye ibintu byiza byamavuta ya silicone.

Imwe. ubushyuhe bwiza

Kubera ko urunigi nyamukuru rwa molekile ya polysiloxane rugizwe na -Si-O-Si- bond, rufite imiterere isa niy'imisemburo ya organic, kandi ingufu zayo zihuza ni nyinshi cyane, bityo ikaba ifite imbaraga zo kurwanya ubushyuhe bwiza.

Babiri. Guhagarara neza kwa okiside hamwe no guhangana nikirere

Bitatu. amashanyarazi meza

Amavuta ya Silicone afite ibyiza bya dielectric, kandi ibiranga amashanyarazi bihinduka bike hamwe nihinduka ryubushyuhe ninshuro. Dielectric ihora igabanuka hamwe nubushyuhe bwiyongera, ariko impinduka ni nto. Imbaraga zamavuta ya silicone ni make, kandi yiyongera hamwe nubushyuhe bwiyongera, ariko ntamategeko agenga ihinduka ryinshuro. Ijwi rirwanya kugabanuka uko ubushyuhe buzamuka.

Bane. hydrophobicity nziza

Nubwo urunigi nyamukuru rwa   amavuta ya silicone agizwe na polar ya Si-O, itsinda ridafite inkingi ya alkyl kumurongo wuruhande rwerekejwe hanze, rikabuza molekile zamazi kwinjira imbere kandi zikagira uruhare rwa hydrophobique. Impagarara zamavuta ya silicone kumazi ni hafi 42 dyne / cm. Iyo ikwirakwije ku kirahure, bitewe n’amazi y’amavuta ya silicone, hashyirwaho inguni ihuza 103oC, igereranywa n’ibishashara bya paraffine.

Bitanu. coefficient ya viscosity-ubushyuhe ni nto

Ubukonje bwamavuta ya silicone ni buke, kandi burahinduka gake hamwe nubushyuhe, bujyanye nuburyo bwimiterere ya molekile ya peteroli ya silicone. Amavuta ya silicone afite ibyiza-byo kuranga ubushyuhe bwiza mumavuta atandukanye. Ibi biranga amavuta ya silicone bifite akamaro kanini kubikoresho byo kugabanya.

Gatandatu. kwihanganira cyane

Bitewe nuburyo bwimiterere iranga molekile ya silicone hamwe nintera nini iri hagati ya molekile, ifite imbaraga zo guhangana cyane. Ukoresheje ibi biranga amavuta ya silicone, irashobora gukoreshwa nkisoko y'amazi. Ugereranije nisoko yimashini, amajwi arashobora kugabanuka cyane.

Birindwi. ubushyuhe buke

Ubushyuhe buke bwo hejuru buranga amavuta ya silicone. Ubushyuhe buke busobanura ibikorwa byo hejuru. Kubwibyo, amavuta ya silicone afite defoaming nziza kandi irwanya ifuro, imiterere yo kwitandukanya nibindi bintu, hamwe nuburyo bwo gusiga amavuta.

Umunani. idafite uburozi, uburyohe hamwe na physiologique inert

Ati: "Dufatiye kuri physiologique, polymers silicone nimwe mubintu bidakora bizwi. Simethicone yinjizwa mu binyabuzima kandi nta reaction yo kwangwa n'imibiri y'inyamaswa. Kubwibyo, zagiye zikoreshwa cyane mumashami nko kubaga nubuvuzi bwimbere, ubuvuzi, ibiryo na cosmetike.

Icyenda. amavuta meza

Amavuta ya Silicone afite ibintu byinshi byiza bisiga amavuta, nka flash point yo hejuru, ahantu hakonje cyane, ubukonje bwumuriro, ihinduka rito ryubushyuhe hamwe nubushyuhe, nta kwangirika kwibyuma, nta ngaruka mbi kuri reberi, plastiki, gutwikira, firime yamabara, hamwe na buke impagarara. Biroroshye gukwirakwiza hejuru yicyuma nibindi biranga. Kugirango tunonosore amavuta yicyuma cyamavuta ya silicon, inyongeramusaruro zishobora kubeshya hamwe namavuta ya silicon irashobora kongerwamo. Kwinjiza itsinda rya chlorophenyl kumurongo wa siloxane cyangwa gusimbuza itsinda rya trifluoropropylmethyl kumatsinda ya dimethyl birashobora guteza imbere cyane amavuta yo kwisiga amavuta ya silicone.

Icumi. Imiterere yimiti

Amavuta ya Silicone arasa nubusembure kuko umurunga wa Si-C urahagaze neza. Ariko okiside ikomeye iroroshye gukorana nayo, cyane cyane mubushyuhe bwinshi. Amavuta ya silicone yitabira cyane gaze ya chlorine, cyane cyane kumavuta ya methyl silicone. Rimwe na rimwe, hazabaho reaction iturika. Inkunga ya Si-O isenywa byoroshye na base ikomeye cyangwa acide. Acide ya sulfurike yibitseho vuba vuba mubushyuhe buke, isenya urunigi rwa siloxane irayihuza. Ni muri urwo rwego, amavuta ya silicone afite amatsinda menshi ya alkane hamwe nitsinda rya fenyl arahagaze neza, ariko acide sulfurike yibanze izasenya benzene-silicon ihuza amatsinda ya fenyl irekura benzene.

 


Igihe cyo kohereza: Kanama-23-2021