Isitashi se-Etherified sisitatshi esibambekayo se-ether eyenziwe ngokusabela kwamaqela e-hydroxyl kwiimolekyuli zesitatshi esinezinto ezisebenzayo, kubandakanywa isitashi se-hydroxyalkyl, isitashi se-carboxymethyl, kunye nesitatshi 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 isenokusetyenziswa 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:
PH ixabiso: Alkaline (5% isisombululo aqueous) Ukunyibilika: Inokunyibilika emanzini abandayo Fineness: Ngaphantsi kwe-500μm Viscosity: 400-1200mpas (5% isisombululo aqueous) Ukuhambelana nezinye izinto: Good kunye nezinye izinto zokwakha admixtures 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 methyl cellulose ethers (Tylose MC amabakala) zisetyenziswa kunye kulwakhiwo imixube owomileyo ukunika ukutyeba okuphezulu, isakhiwo esomeleleyo, ukuxhathisa i-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 alinayo impembelelo 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
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(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 kwaye ukukhuhla 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, i-putty yodonga lwangaphakathi kunye nangaphandle, i-gypsum-based edibeneyo edibeneyo 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