I-silica evuthulukileyosisizalisi esibalulekileyo sokuqinisa kwishishini lerabha. Iipropati zayo ezahlukeneyo zichaphazela ngokungathanga ngqo okanye ngokuthe ngqo ukumelana nokukrala kwerabha ngokuchaphazela ukusebenzisana kwe-interfacial kunye ne-matrix yerabha, ukusasazeka, kunye neepropati zoomatshini zerabha. Ngezantsi, siqala kwiipropati eziphambili, sihlalutya ngokweenkcukacha iindlela zazo ezichaphazela ukumelana nokukrala kwerabha:
1. Indawo ethile yoMphezulu (i-BET)
Indawo ethile yomphezulu yenye yezona mpawu ziphambili ze-silica, ibonisa ngokuthe ngqo indawo yayo yokunxibelelana nerabha kunye nokukwazi ukuqinisa, nto leyo echaphazela kakhulu ukuxhathisa ukurhawuzelelwa.
(1) Impembelelo entle: Ngaphakathi koluhlu oluthile, ukonyusa indawo ethile yomphezulu (umz., ukusuka kwi-100 m²/g ukuya kwi-200 m²/g) kwandisa indawo yoqhagamshelwano phakathi kwe-silica kunye ne-matrix yerabha. Oku kunokunyusa amandla okubopha phakathi kwe-interfacial ngokusebenzisa "isiphumo sokubambelela," ukuphucula ukumelana kwerabha nokuguqulwa kunye nesiphumo sokuqinisa. Ngeli xesha, ubunzima berabha, amandla okutsalwa, kunye namandla okukrazula ziyanda. Ngexesha lokuguguleka, ayithambekeli kakhulu ekuqhekekeni kwezinto ngenxa yoxinzelelo olukhulu lwendawo, nto leyo ekhokelela ekuphucukeni okukhulu kokuxhathisa ukukrazulwa.
(2) Impembelelo engalunganga: Ukuba indawo ethile yomphezulu inkulu kakhulu (umz., idlula i-250 m²/g), amandla e-van der Waals kunye nokudityaniswa kwe-hydrogen phakathi kwamasuntswana e-silica kuyaqina, okubangela ukuba kube lula ukuhlangana (ingakumbi ngaphandle kokulungiswa komphezulu), okukhokelela ekwehleni okukhulu kokusasazeka. Ama-Agglomerate enza "amanqaku oxinzelelo" ngaphakathi kwerabha. Ngexesha lokuguguleka, ukwaphuka kudla ngokuvela ngokukhethekayo malunga nama-agglomerate, ngokuchaseneyo kunciphisa ukumelana nokukrweleka.
Isiphelo: Kukho uluhlu olufanelekileyo lommandla othile (ngesiqhelo yi-150-220 m²/g, eyahluka ngohlobo lwombhobho) apho ukusasazeka kunye nefuthe lokuqinisa kulungelelaniswe, nto leyo ekhokelela ekuchaseni okufanelekileyo kokukrweleka.
2. Ubungakanani beeParticle kunye noSasazo loBukhulu
Ubungakanani bento ephambili (okanye ubungakanani obuhlanganisiweyo) kunye nokusasazwa kwe-silica kuchaphazela ngokungathanga ngqo ukumelana nokurhawuzelelwa ngokuchaphazela ukufana kokusasazeka kunye nokusebenzisana phakathi kwe-interfacial.
(1) Ubungakanani bamasuntswana: Ubungakanani bamasuntswana amancinci (ngokuqhelekileyo ahambelana kakuhle nommandla othile womphezulu) ahambelana neendawo ezinkulu zomphezulu kunye neziphumo eziqinileyo zokuqinisa (njengoko kungasentla). Nangona kunjalo, ubukhulu bamasuntswana amancinci kakhulu (umz., ubungakanani bamasuntswana aphambili < 10 nm) bunyusa kakhulu amandla okuhlangana phakathi kwamasuntswana, nto leyo eyandisa kakhulu ubunzima bokusasazeka. Oku endaweni yoko kukhokelela kwiziphene zasekuhlaleni, kunciphisa ukumelana nokukrweleka.
(2) Ukusasazwa kobungakanani bamasuntswana: I-silica enokusasazwa kobungakanani bamasuntswana amancinci isasazeka ngokulinganayo kwirabha, ithintela "amanqaku abuthathaka" enziwe ngamasuntswana amakhulu (okanye ii-agglomerates). Ukuba ukusasazwa kubanzi kakhulu (umz., equlethe amasuntswana angama-10 nm nangaphezulu kwe-100 nm), amasuntswana amakhulu aba ngamanqaku okuqala ukuguguleka (ngokukhethekileyo aguguleka ngexesha lokuguguleka), okukhokelela ekunciphiseni ukumelana nokuguguleka.
Isiphelo: I-Silica enobukhulu obuncinci be-particle (ehambelana nommandla othile ofanelekileyo) kunye nokusasazwa okuncinci kuluncedo ngakumbi ekwandiseni ukumelana nokukrweleka.
3. Ulwakhiwo (Ixabiso lokufunxa i-DBP)
Ulwakhiwo lubonisa ubunzima obunamasebe e-silica aggregates (ebonakaliswa yi-DBP absorption value; ixabiso eliphezulu libonisa ulwakhiwo oluphezulu). Ichaphazela ulwakhiwo lwenethiwekhi yerabha kunye nokumelana nokuguquguquka.
(1) Impembelelo entle: I-silica enesakhiwo esiphezulu yenza ii-aggregates ezinamasebe amathathu, idala "inethiwekhi yamathambo" exineneyo ngaphakathi kwerabha. Oku kwandisa ukuthamba kwerabha kunye nokumelana neseti yokucinezelwa. Ngexesha lokukrala, le nethwekhi inokuthintela amandla empembelelo yangaphandle, inciphise ukudinwa okubangelwa kukuguquguquka okuphindaphindiweyo, ngaloo ndlela iphucula ukumelana nokukrala.
(2) Impembelelo engalunganga: Ulwakhiwo oluphezulu kakhulu (ukufunxwa kwe-DBP > 300 mL/100g) lubangela lula ukuxinana phakathi kwee-silica aggregates. Oku kukhokelela ekwandeni okukhulu kwe-Mooney viscosity ngexesha lokuxuba irabha, ukuhamba kakuhle kokucubungula, kunye nokusasazeka okungalinganiyo. Iindawo ezinezakhiwo ezixineneyo kakhulu kwindawo ziya kuba nokuguguleka okukhawulezileyo ngenxa yoxinzelelo, ngokuchaseneyo kunciphisa ukumelana nokukrala.
Isiphelo: Ulwakhiwo oluphakathi (ukufunxwa kwe-DBP 200-250 mL/100g) lufanelekile ngakumbi ekulinganiseni ukuqhubekeka kunye nokumelana nokukrweleka.
4. Umxholo weHydroxyl ongaphezulu (iSi-OH)
Amaqela e-silanol (i-Si-OH) kumphezulu we-silica abalulekile ekuphembeleleni ukuhambelana kwayo nerabha, okuchaphazela ngokungathanga ngqo ukumelana nokukrweleka ngamandla okubopha phakathi kwe-interfacial.
(1) Ukunganyangwa: Umxholo ophezulu kakhulu we-hydroxyl (> amaqela ama-5/nm²) ukhokelela ngokulula ekuhlanganeni okuqinileyo phakathi kwamasuntswana ngokusebenzisa i-hydrogen bonding, nto leyo ebangela ukusasazeka okungekuhle. Kwangaxeshanye, amaqela e-hydroxyl awanazo ii-molecule zerabha (ikakhulukazi ezingezizo ii-polar), nto leyo ekhokelela ekudibaneni okubuthathaka phakathi kwe-interfacial. Ngexesha lokuguguleka, i-silica ithambekele ekusukeni kwirabha, nto leyo enciphisa ukumelana nokukruquka.
(2) Inyangwa ngeSilane Coupling Agent: Ii-Coupling agents (umz., iSi69) zisabela ngamaqela e-hydroxyl, zinciphisa ukuhlangana kwee-particle kunye nokwazisa amaqela ahambelana nerabha (umz., amaqela e-mercapto), ziphucula amandla okubopha phakathi kwe-interfacial. Kule ndawo, "i-chemical anching" iyakheka phakathi kwe-silica kunye nerabha. Ukudluliselwa koxinzelelo kuyafana, kwaye ukuxobuka phakathi kwe-interfacial akunakwenzeka ngexesha lokuguguleka, okuphucula kakhulu ukumelana nokukrweleka.
Isiphelo: Umxholo weHydroxyl kufuneka ube phakathi (amaqela ama-3-5/nm²), kwaye kufuneka udityaniswe nonyango lwe-silane coupling agent ukuze kwandiswe ukubophana phakathi kobuso kunye nokuphucula ukumelana nokukrweleka.
Ixabiso le-5.pH
Ixabiso le-pH ye-silica (ngesiqhelo i-6.0-8.0) ngokuyintloko ichaphazela ngokungathanga ngqo ukumelana nokurhawuzelelwa ngokuchaphazela inkqubo yerabha yokuvunguza.
(1) I-Acidic Egqithisileyo (pH < 6.0): Ithintela umsebenzi we-vulcanization accelerators, ilibazisa isantya se-vulcanization, kwaye inokukhokelela kwi-vulcanization engaphelelanga kunye noxinano olunganelanga lwe-crosslink kwirabha. Irabha enoxinano oluphantsi lwe-crosslink ineempawu ezinciphileyo zoomatshini (umz., amandla okutsalwa, ubulukhuni). Ngexesha lokuguguleka, ithambekele ekuguqulweni kweplastiki kunye nokulahleka kwezinto, okubangela ukumelana nokurhawuzelelwa kakubi.
(2) I-Alkaline Egqithisileyo (pH > 8.0): Ingakhawulezisa i-vulcanization (ingakumbi kwi-thiazole accelerators), ibangele i-vulcanization yokuqala ekhawulezayo kakhulu kunye nokungalingani kwe-crosslinking (ukudibanisa kwendawo okanye ukunxibelelana okungaphantsi). Iindawo ezidityanisiweyo kakhulu ziba buthathaka, iindawo ezidityanisiweyo ngaphantsi zinamandla amancinci; zombini ziya kunciphisa ukumelana nokukrweleka.
Isiphelo: I-neutral ukuya kwi-asidi encinci (pH 5.0-7.0) ilungele ngakumbi i-vulcanization efanayo, iqinisekisa iipropati zerabha zoomatshini kunye nokuphucula ukumelana nokukrweleka.
6. Umxholo wokungcola
Ukungcola kwi-silica (ezifana nee-ion zesinyithi ezifana ne-Fe³⁺, i-Ca²⁺, i-Mg²⁺, okanye iityuwa ezingaphendulwanga) kunokunciphisa ukumelana nokukrweleka ngokonakalisa isakhiwo serabha okanye ukuphazamisana ne-vulcanization.
(1) Ii-Ion zeMetal: Ii-ion zemetal eziguqukayo ezifana neFe³⁺ zivuselela ukuguga kwe-oxidative yerabha, zikhawulezisa ukuqhekeka kwe-molecular chain yerabha. Oku kukhokelela ekuwohlokeni kweempawu zoomatshini zezinto ngokuhamba kwexesha, kunciphisa ukumelana nokukrala. I-Ca²⁺, i-Mg²⁺ inokusabela kunye nee-agents ze-vulcanizing kwirabha, iphazamise i-vulcanization kwaye yehlise uxinano lwe-crosslink.
(2) Iityuwa ezinyibilikayo: Ubuninzi beetyuwa ezingcolileyo (umz., i-Na₂SO₄) buyandisa i-hygroscopicity ye-silica, nto leyo ekhokelela ekwakhekeni kweebhamuza ngexesha lokucubungula irabha. Ezi bhamuza zenza iziphene zangaphakathi; ngexesha lokuguguleka, ukungaphumeleli kuqala kwezi ndawo zeziphene, kunciphisa ukumelana nokugruzuka.
Isiphelo: Ubungakanani bokungcola kufuneka bulawulwe ngokungqongqo (umz., Fe³⁺ < 1000 ppm) ukunciphisa imiphumo emibi ekusebenzeni kwerabha.
Ngamafutshane, impembeleloi-silica ekhawulezileyoUkuxhathisa ukurhawuzelelwa kwerabha kuvela kwisiphumo sokusebenzisana kweempawu ezininzi: Indawo ethile yomphezulu kunye nobukhulu besuntswana bumisela amandla okuqinisa asisiseko; isakhiwo sichaphazela ukuzinza kwenethiwekhi yerabha; amaqela e-hydroxyl yomphezulu kunye ne-pH zilawula ukubophelelana kwe-interfacial kunye nokufana kwe-vulcanization; ngelixa ukungcola kunciphisa ukusebenza ngokonakalisa isakhiwo. Kwizicelo ezisebenzayo, indibaniselwano yeempawu kufuneka ilungiswe ngokwehlobo lwerabha (umz., i-compound ye-tire tread, i-sealant). Umzekelo, ii-compounds ze-tread zihlala zikhetha i-silica enommandla othile ophezulu, isakhiwo esiphakathi, ukungcola okuphantsi, kwaye zidityaniswe nonyango lwe-agent ye-silane coupling ukuze kwandiswe ukuxhathisa ukurhawuzelelwa.
Ixesha leposi: Julayi-22-2025