Maxaa silikoon dareere ah loogu isticmaali karaa dhinacyo kala duwan?

1. Soo bandhigida caag silikoon dareere ah oo leh qaabayn dheeraad ah

Kaarboorka dareeraha ah ee silikoonka oo leh qaabayn dheeri ah waxa uu ka kooban yahay polysiloxane vinyl ah oo ah polymer-ka aasaasiga ah, polysiloxane oo leh isku xidhka Si-H oo ah wakiilka isku xidhka iskutallaabta, joogitaanka kataliyaha platinum, heerkulka qolka ama kuleylinta hoosteeda isku xidhka iskutallaabta ee fasalka walxaha silikoonka. Ka duwan caagga silikoonka dareeraha ah ee la isku dhejiyay, habka isku xidhka silikoonka dareeraha ah ee la isku dhejiyay ma soo saaro wax soo saar, yaraansho yar, is-xoqid qoto dheer iyo daxal la'aan walxaha taabashada. Waxay leedahay faa'iidooyinka kala duwan ee heerkulka ballaaran, iska caabin kiimiko oo aad u fiican iyo iska caabin cimilo, waxayna si fudud ugu dhegi kartaa dusha sare ee kala duwan. Sidaa darteed, marka la barbar dhigo silikoonka dareeraha ah ee la isku dhejiyay, horumarinta qaabaynta silikoonka dareeraha ah ayaa dhakhso badan. Waqtigan xaadirka ah, si aad ah ayaa loogu isticmaalaa qalabka elektaroonigga ah, mashiinnada, dhismaha, caafimaadka, baabuurta iyo meelaha kale.

2. Qaybaha ugu Muhiimsan

Polymer-ka Saldhigga ah

Labada polysiloxane ee toosan ee soo socda oo ka kooban vinyl ayaa loo isticmaalaa sidii polymers saldhig ah si loogu daro silicone dareere ah. Qaybintooda miisaanka molecular-ka waa ballaaran tahay, guud ahaan kumanaan ilaa 100,000-200,000. Polymer-ka saldhigga ugu badan ee loo isticmaalo silicone dareere ah oo lagu daro waa α,ω -divinylpolydimethylsiloxane. Waxaa la ogaaday in miisaanka molecular-ka iyo nuxurka vinyl-ka ee polymers-ka aasaasiga ah ay beddeli karaan sifooyinka silicone dareere ah.

wakiilka isku xidhka

Wakiilka isku xidhka ee loo isticmaalo ku darista silicone dareere ah waa polysiloxane-ka dabiiciga ah oo ka kooban in ka badan 3 xidhmo Si-H ah oo ku jira molecule-ka, sida methyl-hydropolysiloxane toosan oo ka kooban kooxda Si-H, methyl-hydropolysiloxane giraanta iyo MQ resin oo ka kooban kooxda Si-H. Kuwa ugu badan ee la isticmaalo waa methylhydropolysiloxane toosan oo ka mid ah qaab-dhismeedka soo socda. Waxaa la ogaaday in sifooyinka farsamada ee jelka silica lagu beddeli karo iyadoo la beddelayo nuxurka haydarojiinta ama qaab-dhismeedka wakiilka isku xidhka iskutallaabta. Waxay ogaatay in nuxurka haydarojiinta ee wakiilka isku xidhka iskutallaabta uu la mid yahay xoogga jiidista iyo adkaanta jelka silica. Gu Zhuojiang et al. waxay heleen saliid silikoon ah oo ka kooban haydarojiinta oo leh qaab-dhismeed kala duwan, miisaan molecular oo kala duwan iyo nuxurka haydarojiinta kala duwan iyagoo beddelaya habka isku-darka iyo qaacidada, waxayna u isticmaaleen sidii wakiil isku xidhka iskutallaabta si loo sameeyo oo loogu daro silikoon dareere ah.

katalyser

Si loo horumariyo waxtarka kicinta ee kiciyeyaasha, waxaa la diyaariyey isku-dhafka platinum-vinyl siloxane, isku-dhafka platinum-alkyne iyo isku-dhafka platinum-ka ee nitrogen-ka wax laga beddelay. Marka laga soo tago nooca kicinta, xaddiga alaabada silikoonka dareeraha ah ayaa sidoo kale saameyn doona waxqabadka. Waxay ogaatay in kordhinta isku-darka kicinta platinum ay kor u qaadi karto falcelinta isku-xidhka ee u dhaxaysa kooxaha methyl iyo joojinta kala-goynta silsiladda ugu weyn.

Sida kor ku xusan, habka loo isticmaalo Vulcanization ee silicone dareeraha lagu daro ee dhaqameed waa falgalka hydrosilylation ee u dhexeeya polymer-ka salka ku jira vinyl-ka iyo polymer-ka ka kooban hydrosilylation. Qaabaynta dareeraha lagu daro ee silicone dareeraha dhaqameed badanaa waxay u baahan tahay caaryo adag si loo soo saaro badeecada kama dambaysta ah, laakiin tignoolajiyadan wax soo saarka dhaqameed waxay leedahay faa'iidooyin qiimo sare leh, waqti dheer, iwm. Badeecooyinku badanaa ma khuseeyaan alaabada elektaroonigga ah. Cilmi-baarayaashu waxay ogaadeen in taxane silicas ah oo leh sifooyin sare lagu diyaarin karo farsamooyin cusub oo daaweyn ah iyadoo la adeegsanayo silicas dareere ah oo mercaptan ah - oo lagu daro labanlaab. Sifooyinkeeda farsamada ee aadka u fiican, xasilloonida kulaylka iyo gudbinta iftiinka ayaa ka dhigi kara mid lagu dabaqo goobo cusub. Iyada oo ku saleysan falcelinta xiriirka mercapto-ene ee u dhexeeya polysiloxane-ka shaqeynaya ee mercaptan iyo polysiloxane-ka la joojiyay ee vinyl-ka oo leh miisaan molecular oo kala duwan, elastomers silicone oo leh adkeysi la hagaajin karo iyo sifooyin farsamo ayaa la diyaariyey. Elastomers-ka daabacan waxay muujinayaan xallinta daabacaadda sare iyo sifooyin farsamo oo aad u fiican. Dheereynta marka ay jabaan qalabka elektarooniga ah ee silicone waxay gaari kartaa 1400%, taasoo aad uga sarreysa qalabka elektarooniga ah ee UV-ga lagu daaweeyo iyo xitaa ka sarreeya qalabka elektarooniga ah ee silicone-ga lagu daaweeyo kulaylka ee ugu fidsan. Kadib qalabka elektarooniga ah ee silicone-ga ah ee aadka u fidsan ayaa lagu mariyay hydrogels-ka lagu dahaadhay nanotubes-ka kaarboon si loogu diyaariyo aaladaha elektarooniga ah ee la fidsan karo. Silikoon la daabacan karo oo la farsamayn karo wuxuu leeyahay fursado ballaaran oo lagu isticmaalo robot-yada jilicsan, qalabka elektarooniga ah ee dabacsan, qalabka caafimaadka lagu rakibo iyo meelaha kale.