Labarai

Akwai nau'o'in organosilicon da yawa, daga cikinsu akwai silane coupling agents da crosslinking agents suna da kama da juna. Yana da wuya ga waɗanda suka yi hulɗa da organosilicon su fahimta. Menene alaƙa da bambanci tsakanin su biyun?
silane hadawa wakili
Wani nau'in fili na siliki ne na kwayoyin halitta wanda ya ƙunshi nau'ikan sinadarai guda biyu daban-daban a cikin kwayoyin halittarsa, waɗanda ake amfani da su don haɓaka ƙarfin haɗin gwiwa na gaske tsakanin polymers da kayan da ba a iya gani ba. Wannan na iya nufin duka haɓaka haɓakar mannewa na gaskiya da haɓakawa na wettability, rheology, da sauran kaddarorin aiki. Ma'aikatan haɗin gwiwa na iya samun tasiri na gyaggyarawa a kan yankin haɗin gwiwa don haɓaka iyakar iyaka tsakanin sassan kwayoyin halitta da na jiki.
Saboda haka, silane hada guda biyu jamiái ana amfani da ko'ina a cikin masana'antu kamar adhesives, coatings da tawada, roba, simintin gyaran kafa, fiberglass, igiyoyi, yadi, robobi, fillers, saman jiyya, da dai sauransu.

Abubuwan haɗin haɗin silane gama gari sun haɗa da:
Sulfur mai dauke da silane: bis - [3- (triethoxysilane) - propyl] - tetrasulfide, bis - [3- (triethoxysilane) - propyl] - disulfide
Aminosilane: gamma aminopropyltriethoxysilane, N - β - (aminoethyl) - gamma aminopropyltrimethoxysilane.
Vinylsilane: Ethylenetriethoxysilane, Ethylenetriethoxysilane
Epoxy silane: 3-glycidoxypropyltrimethoxysilane

Methacryloyloxysilane: gamma methacryloyloxypropyltrimethoxysilane, gamma methacryloyloxypropyltriisopropoxysilane

Hanyar aikin silane coupling agent:
Silane crosslinking wakili
Silane mai ɗauke da ƙungiyoyi biyu ko fiye da ƙungiyoyin aikin silicon na iya aiki azaman wakili mai haɗawa tsakanin ƙwayoyin linzamin kwamfuta, ƙyale ƙwayoyin linzamin kwamfuta da yawa ko macromolecules masu laushi masu laushi ko polymers don haɗawa da hayewa cikin tsarin cibiyar sadarwa mai girma uku, haɓakawa ko yin sulhu da samuwar covalent ko ionic bonds. tsakanin sarƙoƙi na polymer.
Wakilin Crosslinking shine ainihin abin da ke cikin ɗakin daki mai zafin jiki wanda ba a iya gani ba, kuma shine tushen ƙayyadaddun tsarin haɗin giciye da rarraba suna na samfurin.
Dangane da samfuran daban-daban na amsawar gurɓataccen abu, za'a iya rarraba nau'ikan zafin jiki guda ɗaya na ɗaki mai lalata silicone roba zuwa nau'ikan nau'ikan deacidification, nau'in ketoxime, nau'in dealcoholization, nau'in deamination, nau'in deamidation, nau'in deacetylation. Daga cikin su, nau'ikan nau'ikan guda uku na farko sune samfuran gama-gari waɗanda aka samar akan sikeli.

Ɗaukar wakilin methyltriacetoxysilane crosslinking a matsayin misali, saboda samfurin amsawa kasancewar acetic acid, ana kiransa deacetylated dakin zafin jiki vulcanized silicone roba.
Gabaɗaya magana, jami'ai masu haɗin gwiwa da jami'an haɗin gwiwar silane sun bambanta, amma akwai keɓancewa, irin su alpha jerin silane haɗin haɗakarwa jami'an wakilta phenylmethyltriethoxysilane, wanda aka yadu amfani a guda bangaren dealcoholized dakin zafin jiki vulcanized silicone roba.

Na kowa silane crosslinkers sun haɗa da:

Dehydrated silane: alkyltriethoxyl, methyltrimethoxy
Silane nau'in deacidification: triacetoxy, propyl triacetoxy silane
Nau'in Ketoxime silane: Vinyl tributone oxime silane, Methyl tributone oxime silane