Site na mgbasawanye nke ngwaahịa silicone na-aga n'ihu, ha nọ n'ebe niile na ndụ. Mgbe ahụ ajụjụ na-ebilite: Ngwaahịa silicone nwere "BPA" dị ize ndụ?
Mbụ, ka anyị ghọta ihe "BPA" bụ? BPA, makwaara dị ka bisphenol A, na-eji na ụlọ ọrụ synthesize ihe ndị dị ka polycarbonate (PC) na epoxy resin. Kemgbe afọ 1960, a na-eji ya rụpụta karama rọba (mmiri ara ehi), iko sippy maka ụmụaka, na mkpuchi n'ime nri na ihe ọṅụṅụ (mmiri ara ehi ntụ ntụ). Agbanyeghị, BPA nwekwara ike ibute ọrịa endocrine, na-eyi ahụike nke ụmụaka ebu n'afọ na ụmụaka egwu. A kwenyere na oke ibu nke ọrịa kansa na nsogbu metabolic kpatara na-emetụta nke a. Ndị European Union kwenyere na karama ụmụaka nwere bisphenol A nwere ike ime ka oge ntozu. Ka ọnwa Maachị 2, 2011, amachibidoro imepụta karama ụmụaka nwere kemịkalụ bisphenol A(BPA).
Na-esote, ka anyị leba anya n'ụdị nhazi nke ngwaahịa silikoni organic nke "silicone" bụ nke nwere silicon{0} ikuku oxygen, na agbụ akụkụ jikọtara ya na otu organic dị iche iche site na atom silicon. Ya mere, na usoro nke ngwaahịa silicone, e nwere ma "organic iche iche" na "n'ụdị inorganic".
Ngwakọta a pụrụ iche na usoro ihe omimi na-enyere ya aka ijikọta njirimara nke ihe ndị na-emepụta ihe na ọrụ nke ihe ndị na-emepụta ihe. Inorganic silica gel bụ ihe amorphous nwere usoro kemịkal mSiO2 · nH2O. Ọ na-esighi ike na mmiri na ihe mgbaze ọ bụla, ọ dịghị - na-egbu egbu ma na-esi ísì, ma kwụsie ike na kemịkal. Ọ naghị emeghachi omume na ihe ọ bụla ma e wezụga alkali siri ike na hydrofluoric acid. rọba silicone, n'ihi njirimara ya jikọtara ya na ihe ndị na-emepụta ihe, nwere njirimara ndị bụ isi dị ka mgbakasị elu ala dị ala, obere viscosity - okpomọkụ, mkpakọ dị elu, na ikike ikuku dị elu. Ọ na-egosipụtakwa ihe ndị mara mma gụnyere iguzogide oke okpomọkụ na nke dị ala, mkpuchi ọkụ eletrik, nkwụsi ike oxidation, nkwụsi ike ihu igwe, ire ọkụ, nkwụsị mmiri, nguzogide corrosion, enweghị -nsi, enweghị isi, na adịghị ike physiological. Silicone abụghị{11}}na-akpasu iwe, ọ dịghị - na-egbu egbu n'anụ ahụ mmadụ, ọ dịghị akpata mmeghachi ahụ nfụkasị ahụ, ma nwee mmeghachi omume njụta ole na ole n'ime ahụ. Ọ nwere ezigbo anụ ahụ na kemịkal.
N'oge a na-ejikọta ya na mmiri mmiri na anụ ahụ, ọ nwere ike ịnọgide na-agbanwe na ịdị nro mbụ ya n'emeghị ka ọ dị ala. Ọ bụ ihe kwụsiri ike inert. Ọ nwere ike iguzogide oke okpomọkụ wee kpochapụ ya. Ọ dị mma ịhazi na ịkpụzi, dị mfe ịhazi na kanye ụdịdị, ma dị mfe iji. Site na nke a, enwere ike ịhụ na gel silica enweghị "bisphenol A".