Isitatshi se-Etherified sisitatshi esibambekayo se-ether esenziwe kukusabela kwamaqela e-hydroxyl kwiimolekyuli zesitatshi esinezinto ezisebenzayo, kubandakanywa isitashi se-hydroxyalkyl, isitashi se-carboxymethyl, kunye nesitashi se-cationic.Ekubeni i-etherification ye-starch iphucula ukuzinza kwe-viscosity kunye ne-ether bond ayilulanga i-hydrolyzed phantsi kweemeko ezinamandla ze-alkaline, isitashi se-etherified sisetyenziswa kwiindawo ezininzi zoshishino.I-Carboxymethyl starch (CMS) luhlobo oludityanisiweyo lweemveliso zendalo ze-anionic kunye ne-polymer polyelectrolyte ether yendalo enyibilikayo emanzini abandayo.Okwangoku, i-cMS isetyenziswe ngokubanzi kukutya, amayeza, i-petroleum, imichiza yemihla ngemihla, i-textile, i-papermaking, i-adhesives, kunye nemizi-mveliso yepeyinti.i
Kwishishini lokutya, i-CMS ayinayo inetyhefu kwaye ayinabungozi kumzimba womntu kwaye ingasetyenziswa njengokuphucula umgangatho.Imveliso egqityiweyo inemilo egqwesileyo, umbala kunye nencasa, iyenza igudileyo, ityebile kwaye icace;I-CMS isenokusetyenziswa njengento egcina ukutya.Kumashishini amayeza, i-CMS isetyenziswa njenge-tablet disintegrant, i-plasma volume expander, i-thickener yamalungiselelo ohlobo lwekhekhe kunye ne-disperant yeziyobisi kwi-suspoemulsion yomlomo.I-CMS isetyenziswa ngokubanzi kwishishini le-oilfield njengokunciphisa ukulahleka kodaka.Inokumelana netyuwa, iyakwazi ukuxhathisa ityuwa ukuya kwi-saturation, kwaye ineempembelelo ezichasayo kunye nekhono elithile lokulwa ne-calcium.Yeyona kumgangatho ophezulu wokunciphisa ukulahleka kolwelo.Nangona kunjalo, ngenxa yokunganyangeki kobushushu, inokusetyenziswa kuphela kwimisebenzi yequla elingekho nzulu.I-CMS isetyenziselwa ukulinganisa umsonto okhanyayo, kwaye ineempawu zokusasazeka ngokukhawuleza, ipropathi elungileyo yokwenza ifilim, ifilimu enobungakanani obuthambileyo, kunye nokwenza lula.I-CMS ingasetyenziswa njenge-tackifier kunye nesilungisi kwiindlela ezahlukeneyo zokuprinta kunye nokudaya.I-CMS isetyenziselwa i-adhesive kwi-coating yephepha, enokuyenza i-coating ibe nenqanaba elihle kunye nokuzinza kwe-viscosity.Iimpawu zayo zokugcina amanzi zilawula ukungena kwe-adhesive kwisiseko sephepha, ukunika iphepha elifihliweyo iimpawu ezintle zokushicilela.Ukongeza, i-CMS ingasetyenziselwa njengento yokunciphisa i-viscosity ye-slurry yamalahle kunye ne-oyile-coal exutywe nge-fuel slurry, ukuze ibe nozinzo oluhle lwe-emulsion kunye ne-fluidity.Isenokusetyenziswa njengesithathisi sepeyinti ye-latex esekwe emanzini, i-agent ye-chelating yokucoca ugutyulo lwentsimbi enzima, kunye nesicoci solusu kwizinto zokuthambisa.Iimpawu zayo zomzimba zezi zilandelayo:
Ixabiso le-PH: I-alkaline (i-5% yesisombululo se-aqueous) Ukunyibilika: Inokunyibilika emanzini abandayo Ukulunga: Ngaphantsi kwe-500μm Viscosity: 400-1200mpas (5% isisombululo samanzi) Ukuhambelana nezinye izinto: Kuhle kunye nezinye izixhobo zokwakha Ukuhambelana
1. Umsebenzi ophambili
Ikhono elihle kakhulu lokutyeba ngokukhawuleza: i-viscosity ephakathi, ukugcinwa kwamanzi aphezulu;
I-dosage incinci, kwaye idosi ephantsi kakhulu inokufezekisa umphumo ophezulu;
Ukuphucula ukukwazi ukulwa ne-sag yezinto ngokwayo;
Ine-lubricity elungileyo, enokuphucula ukusebenza kwesixhobo kunye nokwenza umsebenzi ube lula.i
2. ububanzi bokusetyenziswa
Isitashi se-ether sifanelekile kuzo zonke iintlobo (isamente, igypsum, i-lime-calcium) yangaphakathi kunye ne-putty yodonga lwangaphandle, kunye nazo zonke iintlobo zodaka olujongene nodaka kunye nodaka lokutyabeka.I-dosage ecetyiswayo: 0.05% -0.15% (kulinganiswa ngeetoni), ukusetyenziswa okuthe ngqo kuxhomekeke kumlinganiselo wangempela.Ingasetyenziselwa njengengxube yeemveliso ezisekelwe kwisamente, iimveliso ezisekelwe kwi-gypsum kunye neemveliso ze-lime-calcium.Isitatshi se-ether sihambelana kakuhle nolunye ulwakhiwo kunye nemixube;ifaneleke ngokukodwa ukwakhiwa kwemixube eyomileyo efana nodaka, i-adhesives, i-plastering kunye ne-rolling materials.Isitatshi ethers kunye ne-methyl cellulose ethers (amabanga eTylose MC) zisetyenziswa kunye kulwakhiwo lwemixube eyomileyo ukunika ukutyeba okuphezulu, ulwakhiwo olomeleleyo, ukuxhathisa kwe-sag kunye nokulula ukuphatha.I-viscosity ye-mortars, i-adhesives, i-plasters kunye ne-roll renders equkethe i-methyl cellulose ethers ephezulu inokuncitshiswa ngokongezwa kwe-starch ethers.i
3. Ukuhlelwa kwee-ethers zesitatshi
Isitatshi ethers ezisetyenziswa kumdaka zilungiswa ukusuka kwiipolima zendalo zepolysaccharides ezithile.Ezinje ngeitapile, umbona, icassava, iimbotyi zeguar njalo njalo.i
Isitatshi esilungisiweyo ngokubanzi
I-ether yesitatshi eguqulwe kwiitapile, umbona, icassava, njl.njl. inokugcinwa kwamanzi okusezantsi kakhulu kuneselulosi ether.Ngenxa yomgangatho ohlukeneyo wokuguqulwa, ukuzinza kwi-asidi kunye ne-alkali kuyahluka.Ezinye iimveliso zifanelekile ukuba zisetyenziswe kwi-gypsum-based mortars, ngelixa ezinye zingasetyenziselwa kwi-samente-based mortars.Ukusetyenziswa kwe-starch ether kwi-mortar kusetyenziswa kakhulu njenge-thickener yokuphucula ipropathi echasene ne-sagging yodaka, ukunciphisa ukunamathela kodaka olumanzi, kunye nokwandisa ixesha lokuvula.Isitashi se-ethers sihlala sisetyenziswa kunye neselulosi, ukwenzela ukuba iipropati kunye neenzuzo zezi mveliso zimbini ziyancedisana.Njengoko iimveliso ze-ether zestatshi zitshiphu kakhulu kune-ether ye-cellulose, ukusetyenziswa kwe-ether yesitatshi kudaka kuya kuzisa ukuncipha okubonakalayo kwindleko yokwenziwa kodaka.i
gcina iether
I-Guar gum ether luhlobo lwe-ether ye-starch eneempawu ezikhethekileyo, eziguqulwa ukusuka kwiimbotyi ze-guar zendalo.Ngokukodwa ngokuphendula kwe-etherification ye-guar gum kunye neqela elisebenzayo le-acrylic, isakhiwo esine-2-hydroxypropyl iqela elisebenzayo lenziwe, eliyisakhiwo se-polygalactomannose.
(1) Xa kuthelekiswa ne-cellulose ether, iguar gum ether inyibilika ngakumbi emanzini.Ixabiso le-pH alinampembelelo ekusebenzeni kwe-guar ethers.i
(2) Ngaphantsi kweemeko ze-viscosity ephantsi kunye ne-dosage ephantsi, i-guar gum ingathatha indawo ye-cellulose ether ngenani elilinganayo, kwaye inokugcinwa kwamanzi okufanayo.Kodwa ukuhambelana, i-anti-sag, i-thixotropy kunye nokunye ngokucacileyo kuphuculwe.(3) Ngaphantsi kweemeko ze-viscosity ephezulu kunye ne-dosage ephezulu, i-guar gum ayikwazi ukuthatha indawo ye-cellulose ether, kwaye ukusetyenziswa okuxubileyo kwezi zibini kuya kuvelisa ukusebenza okungcono.
(4) Ukusetyenziswa kwe-guar gum kwi-gypsum-based mortar kunokunciphisa kakhulu ukubambelela ngexesha lokwakha kunye nokwenza ulwakhiwo lube lula.Ayinayo impembelelo embi kwixesha lokumisela kunye namandla omdaka we-gypsum.i
5i
6i
(7) Ekubeni ixabiso le-guar gum liphantsi kakhulu kune-cellulose ether, ukusetyenziswa kwe-guar gum kwi-mortar kuya kunciphisa kakhulu iindleko zokwenziwa kwemveliso.i
I-thickener yokugcina amanzi eminerali elungisiweyo
I-thickener yokugcina amanzi eyenziwe ngeeminerali zendalo ngokuguqulwa kunye nokudibanisa isetyenziswe e-China.Iiminerali eziphambili ezisetyenziselwa ukulungisa i-thickeners yokugcina amanzi zezi: i-sepiolite, i-bentonite, i-montmorillonite, i-kaolin, njl.Olu hlobo lwe-thickener yokugcina amanzi efakwe kwidaka inezi mpawu zilandelayo.i
(1) Inokuphucula kakhulu ukusebenza kodaka oluqhelekileyo, kunye nokusombulula iingxaki zokungasebenzi kakuhle kodaka lwesamente, amandla aphantsi odaka oluxutyiweyo, kunye nokunganyangeki kwamanzi.i
(2) Iimveliso zodaka ezinamanqanaba ahlukeneyo omelela kwimizi-mveliso ngokubanzi kunye nezakhiwo zoluntu zinokuqulunqwa.i
(3) Ixabiso lezinto eziphathekayo liphantsi kakhulu kune-cellulose ether kunye ne-starch ether.
(4) Ukugcinwa kwamanzi kuphantsi kune-ejenti yokugcina amanzi e-organic, ixabiso le-shrinkage elomileyo lodaka olulungisiweyo likhulu, kwaye ukubambisana kuyancipha.i
4. Ukusetyenziswa kwe-ether yesitatshi
Isitashi se-ether sisetyenziswa ikakhulu kudaka lolwakhiwo, olunokuthi luchaphazele ukuhambelana kodaka olusekwe kwigypsum, isamente kunye nekalika, kwaye utshintshe ukwakhiwa kunye nokumelana nodaka lodaka.Ii-ethers zesitatshi zidla ngokusetyenziswa kunye ne-ethers ye-cellulose engaguqukiyo kunye ne-modified.Ifanelekile kwiinkqubo zombini ezingathathi hlangothi kunye ne-alkaline, kwaye iyahambelana nezona zongezo kwi-gypsum kunye neemveliso zesamente (ezifana ne-surfactants, i-MC, isitashi kunye ne-polymers e-soluble yamanzi njenge-polyvinyl acetate).
Iimpawu eziphambili:
(1) Isitatshi i-ether idla ngokusetyenziswa ngokudibeneyo ne-methyl cellulose ether, ebonisa umphumo omhle we-synergistic phakathi kwezi zibini.Ukongeza ubungakanani obufanelekileyo be-starch ether kwi-methyl cellulose ether kunokuphucula kakhulu ukuxhathisa kwe-sag kunye nokumelana nokutyibilika kodaka, ngexabiso eliphezulu lesivuno.i
(2) Ukongeza isixa esifanelekileyo se-ether yesitatshi kudaka oluqulethe i-methyl cellulose ether inokunyusa kakhulu ukuhambelana kodaka kunye nokuphucula umbane, okwenza ulwakhiwo lube lula kunye nokukhuhla kube lula.(3) Ukongeza isixa esifanelekileyo se-ether yesitatshi kudaka olune-methyl cellulose ether kunokunyusa ukugcinwa kwamanzi kudaka kunye nokwandisa ixesha elivulekileyo.i
(4) Isitatshi se-ether yi-ether eguqulwe ngokwekhemikhali enyibilikayo emanzini, ehambelana nezinye izongezo kudaka olomileyo lomgubo, olusetyenziswa kakhulu kwizincamathelisi zethayile, udaka lokulungisa, ukutyabeka, iputty yangaphakathi kunye nengaphandle eludongeni, i-gypsum-based egrated Joints kunye nezinto zokuzalisa. , iiarhente zojongano, udaka lwemasonry.
Iimpawu ze-starch ether ikakhulu lele koku: ⑴ukuphucula ukumelana ne-sag;⑵ ukuphucula ulwakhiwo;⑶ ukwandisa isivuno sodaka, idosi ecetyiswayo: 0.03% ukuya kwi-0.05%.
Ixesha lokuposa: Feb-16-2023