litaba

Titanium tetraisopropanolate(Tetraisopropyl Titanate), CAS 546-68-9, ke motsoako oa bohlokoa oa organotitanium 'me o sebelisoa haholo liindastering, mahlaleng a thepa le mafapheng a mang. Joale ha re shebeng sehlahisoa sena.

Tlhahisoleseding ea motheo

Thepa ea mantlha ea fisiksekmik'hemistri

Ponahalo le boemo: Mochesong oa kamore, ke mokelikeli o bonaletsang o se nang 'mala ho isa ho o mosehla o bobebe o nang le monko o bohale (o tšoanang le alcohols kapa ethers).

Ho qhibiliha ha metsi: E qhibiliha habonolo ka har'a metsoako ea lintho tse phelang, e arabela ka matla le metsi - e tla haelloa ka potlako ho etsa titanium dioxide (TiO₂) precipitate le isopropyl alcohol ((CH₃)₂CHOH), kahoo e lokela ho bolokoa le ho sebelisoa tikolohong e omileng.

Sebaka sa ho belisa le sebaka sa ho qhibiliha: Ntlha ea ho belisa e ka ba 220-224℃ (khatellong e tloaelehileng), 'me ntlha ea ho qhibiliha e ka ba 14℃ (e ka tiea ka tlase ho 14℃ 'me ea ka qhibilihisa hape ha e futhumatsoa).

Ho tsitsa: E na le kutloelo-bohloko moeeng, e monya mongobo habonolo moeeng 'me e feta hydrolysis. E ka 'na ea bola mochesong o phahameng 'me ea ntša likhase tse halefisang.

Tšebeliso e ka sehloohong

Tšebeliso ea titanium tetraisopropanolate e itšetlehile haholo ka litšobotsi tsa eona tse tharo tsa mantlha: hydrolysis e bonolo ho etsa titanium dioxide, ho lumellana hantle ha lintho tse phelang, le ts'ebetso ea catalytic. Titanium tetraisopropanolate e sebelisoa haholo masimong a mangata a kang ho kopanya thepa, catalysis ea indasteri, liphahlo le likhomaretsi. Maemo a ikhethileng a ts'ebeliso ke a latelang.

I. Tšebetso ea Tšimo ea Lisebelisoa: Core e le "selelekela sa titanium dioxide"

Ena ke ts'ebeliso e ka sehloohong ea titaniniv Isopropox IDE. Ka ho sebelisa monyetla oa karabelo ea eona ea hydrolysis, thepa ea titanium dioxide (TiO₂) ea mefuta le thepa e fapaneng e ka lokisoa hantle ho fihlela litlhoko tse fapaneng.

Ho lokisoa ha nano-titanium dioxide

Isopropoxide ea Titanium(IV)e qhibilihisoa ka har'a solvent ea tlhaho ka "mokhoa oa sol-gel", ebe e haelloa butle-butle tlas'a maemo a laolehang (ho fetola pH, mocheso, le sekhahla sa hydrolysis) ho etsa "sol" e ts'oanang. Kamora ho omisa le ho baka calcination ho eketsehileng, phofo ea titanium dioxide kapa filimi ea nano-scale e fumanoa. Mofuta ona oa nano-tio ₂ o na le sebaka se phahameng se ikhethileng le ts'ebetso e ntle ea photocatalytic, 'me o ka sebelisoa bakeng sa:

Lisebelisoa tsa Photocatalytic: ho phekola likhoerekhoere (ho senya litšila tsa tlhaho), ho hloekisa moea (ho bolisa formaldehyde le VOC);

Litlolo tsa setlolo sa letsatsi: Titanium tetraisopropanolate e le setlolo sa 'mele sa setlolo sa letsatsi (nano-tio ₂ e ka bonahatsa mahlaseli a ultraviolet, e na le ponahalo e phahameng 'me ha e fetohe e tšoeu);

Lisebelisoa tsa Optoelectronic: Titanium tetraisopropanolate bakeng sa ho lokisa lera le monyang khanya la lisele tsa letsatsi le filimi e tšesaane e sebetsang ea lisebelisoa tsa ponts'o ea kristale ea metsi.

Liaparo tse sebetsang tsa ceramic le khalase

Isopropoxide ea Titanium(IV) e kopanngoa le lintho tse ling tse eketsang (tse kang li-coupling agents tsa silane) ho etsa tharollo ea ho koahela, e ntan'o fafatsoa kapa ea ineloa holim'a li-ceramics le khalase. Kamora ho futhumatsa le ho phekola, TiO₂ e hlahisoang ke hydrolysis ea tetraisopropyl titanate e etsa seaparo se bonaletsang se nang le bothata bo phahameng, ho hanyetsa mocheso o phahameng le ho hanyetsa ho tsofala, se ka:

Ntlafatsa ho hanyetsa matheba a dijana tsa tafole tsa ceramic le disebediswa tsa ho hlapela (fokotsa ho kgomarela ha matheba a oli);

Ntlafatsa ho hanyetsa ho ngoatheha ha khalase (joalo ka khalase e sireletsang skrine ea mohala oa thekeng, khalase ea koloi);

Khalase e nang le mosebetsi oa "ho itlhoekisa" (ho sebelisa thepa ea photocatalytic ea TiO₂ ho bolisa lerōle le matheba a holim'a metsi).

Ho kopanngoa ha thepa e sebetsang e thehiloeng ho titanium

Jwalo ka mohlodi wa titanium, e arabela ka kopanelo le matswai a mang a tshepe (jwalo ka matswai a aluminium le matswai a zirconium) ho lokisa di-oxide tse kopaneng tsa titanium-aluminium, ditharollo tse tiileng tsa titanium-zirconium le disebediswa tse ding, tse sebediswang ka hara di-ceramic tse nang le mocheso o phahameng le di-catalyst carriers (ho ntlafatsa botsitso le sebaka se ikgethang sa di-catalyst).

II. Tšimo ea Catalysis ea Indasteri: Likarabelo tse sebetsang hantle tsa catalytic organic

Ka lebaka la bokhoni ba ho hokahanya orbital ea d e se nang letho ba athomo ea titanium e bohareng (Ti⁴⁺), Titanium IV Isopropox IDE cas 546-68-9 ke sesebelisoa se setle sa ho baka mefuta e fapaneng ea likarabelo tsa tlhaho, haholo-holo se loketseng maemo a hlokang khetho e phahameng le likarabelo tse tlase:

Li-catalyst bakeng sa liketso tsa esterification le transesterification

Ha ho kopanngoa li-resin tsa polyester (tse kang PET le PBT), ho nkela li-catalyst tsa asiti tsa setso sebaka (tse kang sulfuric acid) sebaka ho ka potlakisa karabelo ea esterification lipakeng tsa li-acid tsa carboxylic le alcohols, ho fokotsa lihlahisoa tse ling (tse kang ho felloa ke metsi ha alcohols), 'me catalyst e bonolo ho e arola ho lihlahisoa, ka hona ho ntlafatsa bohloeki ba resin.

Titaniumiv isopropoxide cas 546-68-9e susumetsa dikarabelo tsa transesterification (tse kang karabelo ya di-ester tse tlase tse nang le dino tse ngata ho etsa di-ester tse phahameng) tlhahisong ya ditatso le dinkgisamonate le di-intermediate tsa meriana, e ntlafatsa bokgoni ba karabelo le tlhahiso ya dihlahiswa.

Khetho ea catalysis ho tsoakong ea lintho tse phelang

Titanium tetraisopropanolate, e le motheo oa "titanium catalytic system" (joalo ka ha e kopantsoe le li-ester tsa tartrate), e sebelisoa liketsong tsa epoxidation tse sa lekanang (bakeng sa ho kopanya li-epoxide tsa chiral, metsoako ea bohlokoa ea meriana);

Isopropoxide ea titanium(IV) e susumetsa liketso tsa aldol condensation mme e laola sebopeho sa sehlahisoa ka nepo, e leng se etsang hore se lokele indasteri e ntle ea lik'hemik'hale.

III. Lebala la Liaparo le Likhomaretsi: Ho ntlafatsa ts'ebetso ea sebopeho sa thepa

Ka ho sebelisa monyetla oa tšobotsi ea eona ea "borokho ba tlhaho-bo sa tlhaho" (ntlha e 'ngoe e hokahantsoe le thepa e sa tloaelehang 'me ntlha e 'ngoe e hokahantsoe le thepa ea tlhaho), ho khomarela le ho tšoarella ha liphahlo le likhomaretsi ho ka ntlafatsoa:

Indasteri ea liaparo: Baemeli ba ho hokahanya le ba khothalletsang ho khomarela

Ha ho eketsoa tekanyo e nyane ea tetraisopropyl titanate ho lipente tsa acrylic le lipente tsa polyurethane, sehlopha sa isopropoxy se ka arabela le lihlopha tsa hydroxyl (-OH) le carboxyl (-COOH) ka har'a pente ho theha sebopeho se hokahaneng, ka hona ho eketsa khanyetso ea boemo ba leholimo (khanyetso ea botsofali ba UV), khanyetso ea metsi le ho thatafala ha pente.

Setlolo sa pele bakeng sa di-substrate tsa tshepe tse kang tshepe le aloi ya aluminium, se kgothaletsa ho kgomarela ha lesela hodima bokahodimo ba tshepe le ho fokotsa ho petsoha le ho rusa ha lesela.

Indasteri ea sekhomaretsi: Ntlafatsa matla a tlamahano

Titanium tetraisopropanolate e sebelisoa e le "sesebelisoa sa ho kopanya" ka har'a likhomaretsi tsa resin ea epoxy le likhomaretsi tsa silicone. Karolo e 'ngoe e arabela le lihlopha tsa hydroxyl holim'a li-substrate tse sa tloaelehang tse kang litšepe le li-ceramic, 'me karolo e 'ngoe e kopana le liketane tsa polymer tsa tlhaho tsa likhomaretsi. E ntlafatsa haholo matla a ho kopanya le mongobo le ho hanyetsa mocheso oa likhomaretsi ho thepa e sa tloaelehang (joalo ka ho paka le ho kopanya likarolo tsa elektroniki).

IV. Merero e meng e ikhethang

Kalafo ea bokaholimo ba tšepe

Titanium tetraisopropanolate e sebedisetswa kalafo ya ho passive holim'a aluminium le di-alloy tsa magnesium. TiO₂ e hlahiswang ke hydrolysis ya tetraisopropyl titanate e bopa filimi ya passive e kopaneng e nang le oxide hodima bokahodimo ba tshepe, e eketsang ho hanyetsa ho bola ha tshepe (e nkela passive ya chromate ya setso sebaka mme e be mosa haholo tikolohong).

Ho lokisa thepa ea mahlo

Ka theknoloji ea "chemical vapor deposition (CVD)", mouoane oa tetraisopropyl titanate o kenngoa ka kamoreng ea karabelo, moo o bola holim'a substrate (joalo ka khalase ea quartz) ho theha lifilimi tsa TiO₂, tse sebelisetsoang ho lokisa li-filter tsa optical le li-coat tse thibelang khanya (bakeng sa ho laola phetisetso ea leseli).

Indasteri ea masela: Lisebelisoa tsa ho qetela tse sebetsang

Isopropoxide ea Titanium(IV)E arabela le lihlopha tsa hydroxyl holim'a likhoele tsa masela ho etsa filimi ea TiO₂ holim'a faeba, e fa lesela thepa ea ho loantša likokoana-hloko (e sebelisa phello ea baktheria ea photocatalytic ea TiO₂) le ho hanyetsa mahlaseli a kotsi a letsatsi (joalo ka masela a sireletsang letsatsi a kantle).