Isiqinisi esisekelwe emanzini asinyibiliki emanzini, kodwa sinophawu oluthile lokuqina (asinayo i-ionic okanye ubude be-molecular chain obufikelela kumanqanaba ama-2 ~ 3, indawo enkulu yomphezulu othile) wezongezo zendalo. Ludidi lwesiqinisi esisekelwe emanzini , esisetyenziswa kakhulu kwiingubo, iiplastiki, irabha, iipeyinti kunye nezinye iingubo zendalo, izincamathelisi kunye neminye imboni. I-Stiffener ludidi lweekhompawundi zendalo ezifakwe i-hydrogen ukwenza i-emulsion yamaqela e-ester (jonga iSihlomelo A), isiqinisi senziwe kakhulu yi-stearic acid (i-ester), i-hydroxyl (ingakumbi iqela le-ester), i-hydrogen bonding, i-hydroxyl, i-carboxyl, kunye namaqela e-amide. Isiqinisi se-hydrogen phakathi kwamaqela e-ester sinika isiqinisi isiphumo sokufunxa amanzi okanye sokudumba. Ke ngoko, isiqinisi sinokuyoyisa ngempumelelo ipeyinti, isincamathelisi ngenxa yokwanda kobushushu obuphezulu komaleko wesincamathelisi oqhekekileyo, oqhekekileyo okanye oqhekekayo kunye nezinye iziphene. Sinokumelana okuhle kokwaluphala, ukumelana ne-asidi kunye ne-alkali, kunye neempawu ezilungileyo zoomatshini, ukumelana nemozulu, ukumelana nobushushu kunye nokumelana nokubanda.
- isishwankathelo
Ngokwesakhiwo sayo, i-stiffener inokwahlulwa ibe ngamacandelo amabini: i-oil-soluble kunye ne-soluble yamanzi. I-oil-soluble stiffener isetyenziswa kakhulu kwiingubo, iiplastiki kunye nerubha kunye nezinye iingubo eziphilayo zokukhusela izinto eziphathekayo, ukugqabhuka, ukukhupha kunye nezinye iziphene ngenxa yokwanda kweqondo lokushisa. I-stiffener e-soluble yamanzi inefuthe elithambileyo kwisisombululo se-oyile kunye namanzi, esingayi kwenza ipeyinti iqhekeze, kodwa umxube we-pigment awukwazi ukuphendulwa ngokupheleleyo okanye wenze i-turbid kunye nezinye iziphene. Ngenxa isiphumo ukuqina akavelisi by-imveliso (ezifana acrylic uhlobo asidi okanye sulfonate uhlobo ester) okanye ayivelisi by-imveliso, ngaloo ndlela kuphuculwe dispersibility of lukhuni kunye nokwandisa isakhono ukuqina kakhulu ukuphucula ukumelana ubushushu bayo, imozulu, ukumelana nokubanda kunye nokusebenza ubushushu obuphantsi. Ngexesha elifanayo kunokunciphisa inani le-solvents kwi-coating kunye nokwandisa i-stiffener yamanzi ngexesha lokumisa elifunekayo ukunciphisa iindleko zokuvelisa.
- II. Ubume bemichiza esisiseko
I-Stiffeners ngokubanzi yenziwe nge-acetate esters, i-fatty acid esters, i-hydroxy acid esters okanye i-alkyl lipids. Ininzi ye-stiffener ine-absorption yamanzi, ngoko i-solvents ye-organic inokusasazwa ngokufanelekileyo kwi-emulsion kwaye inciphise i-viscosity ye-stiffener system, ingasetyenziselwa njenge-stabilizer okanye i-emulsifier. I-Stiffener nayo ineempawu ezikhethekileyo zohlobo, ezifana ne-solvent-based stiffener esetyenziswa kwiiplastiki, i-rubber, i-coatings, i-adhesives kunye namanye amashishini. I-solvent-based stiffeners isetyenziswa kwiipeyinti kunye neengubo ezinefuthe elihle lokuqina. Ulwelo lusetyenziswa kwishishini lokutya ukugcina ukuqhubekeka kakuhle. I-insoluble emanzini, i-soluble kwi-solvents ye-organic efana ne-acrylates, inokudityaniswa noninzi lwe-solvents eziphilayo. Inokuvelisa i-hydrogen bonding kunye ne-asidi kunye ne-alkali, inamandla okuchela eqinile kwi-anhydride kunye namanye amandla e-ionic, kwaye inokwenziwa i-polymerized ngeentlobo ezahlukeneyo zeepolymers. Inokumelana nemozulu elungileyo, ukuqina okuphezulu kunye nokuxhathisa umhlwa.
III. Ukusetyenziswa kwe-stiffener
Ukuxuba: i-stiffener kumxube iya kubonakala i-aggregation ngakumbi, kwinkqubo yokuxuba kunye nokuvuselela ukuvelisa i-phenomenon of bubbles, kunye nokumiswa okukhulu. Kuya kukhokelela ekubunjweni kwefilimu ye-emulsion ebusweni bepeyinti kwaye kubangele umphumo ombi wokuqina kunye nezinye iingxaki. Ngoko ke, ingqwalasela kufuneka ihlawulwe kwi-dosage ye-hardener, isixa kufuneka sifaneleke, kwaye umxube akufanele ube mkhulu kakhulu, ukwenzela ukuba ungasasazeki ngokungalingani okubangelwa yi-blistering, echaphazela ukusetyenziswa kwesiphumo.
Ukuxutywa kwesantya esisezantsi: izixhobo zokuxuba ezisezantsi zisetyenziselwa ukuqinisa ukuqina kunye nokwenza umxube wamanzi wokuhambelana okufanayo. Indlela inezi ntlobo zilandelayo: okokuqala yongeza i-concentration ephantsi ye-stearic acid (i-ester), i-hydroxyl, i-hydrogen bonding kunye ne-hydroxyl, kwaye ixutywe kunye ne-stearic acid okanye iqela le-ester ukwenza i-stiffener; okanye ezi zimbini ezinomxube oqinileyo emva kokongeza umlinganiselo ofanelekileyo wamanzi ukuze wenze i-denatured ngokufudumeza.
Uhlobo lwesinyibilikisi: olu hlobo lwesiqinisi lusekelwe kwi-carboxyl (okanye i-hydroxyl) njengodidi lweekhompawundi ze-organic okanye ii-polymers, ezinyibilikiswe emanzini kwaye zenze isakhiwo se-copolymer (ngokubanzi esisekelwe kwi-ester). Okanye i-polymerization yayo ukuze ifumane uthotho olude lwe-molecular, indawo enkulu yomphezulu, i-viscosity ephezulu kwaye ineempawu ezilungileyo zokusasazeka kunye nenqanaba elithile lokunamathela kwinkqubo yokugquma emanzini (ngokuyintloko kuxhomekeke kubungakanani benkqubo ye-resin kwi-stiffener) ye-polymer yesakhiwo esidibeneyo semveliso. I-Stiffener lulwelo lwe-emulsion, olufunxwa kubushushu begumbi kwaye ludlula kuthotho lweempendulo ukwenza isakhiwo senethiwekhi. Ii-Stiffener zihlala ziqulathe amanani amancinci eetyuwa, ii-carboxylic acids (umz., i-hydroxylamine, ii-phosphate esters, okanye i-disodium sulfonate), okanye amanani amancinci ee-ion zesinyithi njengezongezo. Uluhlu lokusetyenziswa kwayo lubanzi kakhulu, kubandakanya iingubo ezisekelwe emanzini , iifilimu zeplastiki, izincamathelisi kunye nee-polymers eziqulethe isiqinisi nazo zingasetyenziswa njengezinto ezisisiseko zokugquma okanye iimveliso zeplastiki.
- Isiseko samanzi okanye i-oyile: esebenzayo kuzo zonke iintlobo zeengubo, ngokuqhelekileyo iimveliso eziphakathi;
- i-non-water soluble: inokunyibilika emanzini kwaye emva koko isasazwe kancinci kwi-emulsion ihlakazwe ngokufanayo;
- Ukuxutywa kwesigaba esiqinileyo: i-emulsion liquid inokongezwa kwizinto eziqinileyo kunye neentlobo ze-adhesives eziphilayo kwaye zixutywe kakuhle (eziqulethe i-organic fillers) yokudibanisa; ukongeza inani elifanelekileyo le-stiffener liya kwenza i-stiffener kunye nobunzima obuthile bokuphucula iimpawu zayo zomatshini kunye nokuchasana nokuguga;
- Ukugquma kokuqina okusekelwe emanzini.
- IV. Ukusetyenziswa kwe-ejenti yokuqina kwiingubo eziphilayo, iiplastiki, irabha kunye namanye amashishini
Ukusetyenziswa kweziqinisi kwimigqumo esekwe emanzini ikakhulu kukuguqula iipolyester ezingagcwaliyo, ii-emulsions ze-copolymer, njl.njl., ezinokuphucula ukusebenza kweeresini zokwenziwa. I-polymer eqinileyo ayinabo nje kuphela ubunzima obuphezulu, kodwa ikwanabo nokumelana kakuhle kwamanzi kunye nokumelana nokuguga. Xa isetyenziswa, i-arhente yokuqinisa ingaxutywa ibe sisisombululo esinoxinzelelo lwe-20-40%, ize yongezwe kwi-kettle yokusabela ukuze i-emulsification reaction, kwaye i-emulsion yokuqinisa ephezulu ingafunyanwa emva kokongeza isixa esifanelekileyo sokuxuba. Xa i-emulsion iqulethe ngaphezu kwenxalenye ethile yezinyibilikisi ze-organic, i-polymerization kunye nokubola kuya kwenzeka, oku akuyi kunciphisa kuphela ukusebenza kwe-resin kodwa kubangele nokuguga kwezixhobo okanye iimveliso. Ke ngoko, ukongeza isixa esifanelekileyo se- arhente yokuqinisa kwinkqubo yemveliso yokugcoba kunye ne-polymer kunokuphucula isiphumo sayo sokusetyenziswa kwaye kwenze imveliso ibe nokuguquguquka okungcono kunye nokumelana nobushushu obuphezulu.
- V. Izilumkiso
- I-ejenti yokuqina iya kubola kwizinto ze-polar phantsi kobushushu obuphezulu kunye neemeko zomswakama ophezulu, ngoko kufuneka ivalwe kwaye igcinwe ukukhusela ukuvuza kunye nokungcoliswa kwemveliso.
- Ukugcinwa kufuneka kufakwe umoya kwaye kumile, gcina igumbi lomile.
- Kuphephe ukutshiswa lilanga.
- Yongeza kwaye usebenzise ngokucothayo xa ufaka isicelo.
- Musa ukuxuba okanye ukuxuba imveliso ngamanzi, okanye udibanise nezinye ii-agent zokunyanga, iifayili, ii-pigments, iifayili okanye ii-pigments xa zisetyenziswa.
- Akuvumelekanga ngokungqongqo ukudibanisa nelothe, i-mercury kunye nezinye izongezo zetsimbi enzima.
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