Isingeniso esifushane se-starch ether

I-Etherified isitashi i-ether ebambele isitashi eyakhiwe ukusabela kwamaqembu e-hydroxyl kuma-molecule esitashi anezinto ezisebenzayo, okuhlanganisa isitashi se-hydroxyalkyl, isitashi se-carboxymethyl, nesitashi se-cationic.Njengoba i-etherification yesitashi ithuthukisa ukuzinza kwe-viscosity futhi ibhondi ye-ether ayifakwa kalula i-hydrolyzed ngaphansi kwezimo eziqinile ze-alkaline, isitashi se-etherified sisetshenziswa emikhakheni eminingi yezimboni.I-Carboxymethyl isitashi (CMS) iwuhlobo lwemikhiqizo yemvelo ye-anionic kanye ne-polymer polyelectrolyte ether yemvelo encibilika emanzini abandayo.Njengamanje, i-cMS isetshenziswe kabanzi ezimbonini zokudla, imithi, i-petroleum, amakhemikhali ansuku zonke, izindwangu, ukwenza amaphepha, izinto zokunamathisela, nezimboni zikapende.i

Embonini yokudla, i-CMS ayinabo ubuthi futhi ayinabungozi emzimbeni womuntu futhi ingasetshenziswa njengesithuthukisi sekhwalithi.Umkhiqizo ophelile unomumo omuhle kakhulu, umbala kanye nokunambitheka, okwenza kube bushelelezi, obukhulu futhi bukhanye;I-CMS ingasetshenziswa futhi njengesilondolozi sokudla.Embonini yezemithi, i-CMS isetshenziswa njenge-tablet disintegrant, i-plasma volume expander, i-thickener yamalungiselelo ohlobo lwekhekhe kanye ne-dispersant yezidakamizwa ye-oral suspoemulsion.I-CMS isetshenziswa kabanzi embonini ye-oilfield njengendlela yokunciphisa ukulahlekelwa koketshezi lodaka.Inokumelana nosawoti, ingamelana nosawoti ukuze ugcwale, futhi inemiphumela yokulwa nokwehla kanye nekhono elithile lokulwa ne-calcium.Yisinciphisi sekhwalithi ephezulu sokulahlekelwa uketshezi.Kodwa-ke, ngenxa yokumelana nezinga lokushisa eliphansi, ingasetshenziswa kuphela ekusebenzeni kwemithombo engajulile.I-CMS isetshenziselwa ukulinganisa intambo ekhanyayo, futhi inezici zokuhlakazeka okusheshayo, indawo enhle yokwenza ifilimu, ifilimu yosayizi othambile, kanye nokwenza lula.I-CMS ingasetshenziswa futhi njenge-tackifier kanye nesishintshi ekuhlanganiseni okuhlukahlukene nokudaya.I-CMS isetshenziswa njenge-adhesive in paper coating, engenza ukunamathela kube nokulingana okuhle nokuzinza kwe-viscosity.Izakhiwo zayo zokugcinwa kwamanzi zilawula ukungena kwe-adhesive esisekelweni sephepha, ukunikeza iphepha elihlanganisiwe izici ezinhle zokunyathelisa.Ngaphezu kwalokho, i-CMS ingasetshenziswa njengendlela yokunciphisa i-viscosity ye-slurry yamalahle kanye ne-oil-coal exutshwe uphethiloli slurry, ukuze ibe nokusimama okuhle kwe-emulsion nokusimama kwamanzi.Ingasetshenziswa futhi njenge-tackifier yopende osuselwe emanzini we-latex, i-chelating ejenti yokuhlanza indle yensimbi enzima, kanye nesihlanzi sesikhumba ezimonyoni.Izici zayo ezingokomzimba zimi kanje:

Inani le-PH: I-alkaline (5% isixazululo se-aqueous) Ukunyibilika: Kungancibilika emanzini abandayo Ukulunga: Ngaphansi kuka-500μm I-Viscosity: 400-1200mpas (isixazululo esinamanzi esingu-5%) Ukuhambisana nezinye izinto zokwakha: Kuhle nezinye izingxube zempahla yokwakha Ukuhambisana

1. Umsebenzi oyinhloko

Ikhono elihle kakhulu lokuqina okusheshayo: i-viscosity ephakathi, ukugcinwa kwamanzi aphezulu;

Isilinganiso sincane, futhi umthamo ophansi kakhulu ungafinyelela umphumela ophezulu;

Thuthukisa ikhono le-anti-sag lento ngokwayo;

Ine-lubricity enhle, engathuthukisa ukusebenza kwempahla futhi yenze umsebenzi ube bushelelezi.i

2. ububanzi bokusetshenziswa

I-starch ether ilungele zonke izinhlobo (usimende, igypsum, i-lime-calcium) i-putty yangaphakathi yodonga lwangaphakathi nangaphandle, kanye nazo zonke izinhlobo zodaka olubheke phezulu nodaka lokuplasta.Umthamo onconyiwe: 0.05% -0.15% (kukalwa ngamathani), ukusetshenziswa okuqondile kungaphansi kwesilinganiso sangempela.Ingasetshenziswa njengengxube yemikhiqizo esekwe usimende, imikhiqizo esekwe kwigypsum kanye nemikhiqizo ye-lime-calcium.I-starch ether inokuhambisana okuhle nokunye ukwakhiwa kanye nezingxube;ifaneleka ngokukhethekile ukwakhiwa kwezingxube ezomile ezifana nodaka, izinto zokunamathisela, ukuplasta kanye nezinto zokugingqa.Ama-ether esitashi nama-methyl cellulose ethers (amabanga e-Tylose MC) asetshenziswa ndawonye ekwakheni izingxube ezomile ukuze anikeze ukujiya okuphezulu, ukwakheka okuqinile, ukumelana nokuntenga kanye nokubamba kalula.I-viscosity yodaka, izinto ezinamathelayo, amaplasta kanye nama-roll renders aqukethe i-methyl cellulose ether ephezulu ingancishiswa ngokufakwa kwe-starch ether.i

3. Ukuhlukaniswa kwesitashi ether

Ama-ether esitashi asetshenziswa odakeni aguqulwa asuka kuma-polymer emvelo amanye ama-polysaccharides.Okufana namazambane, ummbila, umdumbula, ubhontshisi nokunye.i

Isitashi esishintshiwe esijwayelekile

I-ether yesitashi elungiswe kusukela kumazambane, ummbila, umdumbula, njll. inokugcinwa kwamanzi okuphansi kakhulu kune-cellulose ether.Ngenxa yezinga elihlukile lokuguqulwa, ukuzinza kwe-asidi ne-alkali kuhlukile.Eminye imikhiqizo ilungele ukusetshenziswa odakeni olususelwa ku-gypsum, kanti eminye ingasetshenziswa odakeni olusekelwe kusimende.Ukufakwa kwe-starch ether odakeni kusetshenziswa ngokuyinhloko njenge-thickener ukuze kuthuthukiswe indawo yokulwa nokucwila kodaka, ukunciphisa ukunamathela kodaka olumanzi, nokwandisa isikhathi sokuvula.Ama-ether esitashi avame ukusetshenziswa kanye ne-cellulose, ukuze izakhiwo nezinzuzo zale mikhiqizo emibili kuphelelisane.Njengoba imikhiqizo yesitashi se-ether ishibhile kakhulu kune-cellulose ether, ukusetshenziswa kwe-starch ether odakeni kuzoletha ukuncipha okukhulu kwezindleko zokwenziwa kodaka.i

i-ether

I-Guar gum ether iwuhlobo lwe-starch ether enezakhiwo ezikhethekile, eshintshwa kusukela kubhontshisi we-guar wemvelo.Ikakhulukazi ngokusabela kwe-etherification ye-guar gum neqembu elisebenzayo le-acrylic, isakhiwo esiqukethe i-2-hydroxypropyl iqembu elisebenzayo liyakhiwa, okuyisakhiwo se-polygalactomannose.

(1) Uma kuqhathaniswa ne-cellulose ether, i-guar gum ether incibilika kakhulu emanzini.Inani le-pH alinawo umthelela ekusebenzeni kwama-guar ether.i

(2) Ngaphansi kwezimo ze-viscosity ephansi kanye nomthamo ophansi, i-guar gum ingashintsha i-cellulose ether ngenani elilinganayo, futhi inokugcinwa kwamanzi okufanayo.Kodwa ukungaguquguquki, i-anti-sag, i-thixotropy nokunye ngokusobala kuthuthukisiwe.(3) Ngaphansi kwezimo ze-viscosity ephezulu kanye nomthamo ophezulu, i-guar gum ayikwazi ukufaka esikhundleni se-cellulose ether, futhi ukusetshenziswa okuxubile kwakho kokubili kuzoveza ukusebenza okungcono.

(4) Ukusetshenziswa kwe-guar gum odakeni olusekelwe ku-gypsum kunganciphisa kakhulu ukunamathela ngesikhathi sokwakha futhi kwenze ukwakhiwa kube bushelelezi.Ayinawo umthelela omubi ekubekeni isikhathi namandla e-gypsum mortar.i

(5) Uma i-guar gum isetshenziswa kusimende kanye nosimende olwakhiwe ngosimende, ingashintsha i-cellulose ether ngenani elilinganayo, futhi inikeze udaka ukumelana nokuntenga okungcono, i-thixotropy kanye nobushelelezi bokwakha.i

(6) I-Guar gum ingasetshenziswa emikhiqizweni efana nezinamatheliso zamathayili, izinto ezizilinganisa phansi, i-putty engangeni manzi, kanye nodaka lwe-polymer ukuze kufakwe udonga.i

(7) Njengoba intengo ye-guar gum iphansi kakhulu kunaleyo ye-cellulose ether, ukusetshenziswa kwe-guar gum odakeni kuzonciphisa kakhulu izindleko zokwenziwa komkhiqizo.i

I-thickener yokugcina amanzi amaminerali eshintshiwe

I-thickener egcina amanzi eyenziwe ngamaminerali emvelo ngokulungiswa nokuhlanganisa isetshenziswe eShayina.Amaminerali amakhulu asetshenziselwa ukulungisa ama-thickeners okugcina amanzi yilawa: i-sepiolite, i-bentonite, i-montmorillonite, i-kaolin, njll. Lawa mamineral anezindawo ezithile zokugcina amanzi kanye nokujiya ngokuguqulwa njengama-coupling agents.Lolu hlobo lwe-thickener egcina amanzi efakwe odakeni lunezici ezilandelayo.i

(1) Ingathuthukisa kakhulu ukusebenza kodaka olujwayelekile, futhi ixazulule izinkinga zokungasebenzi kahle kodaka lukasimende, amandla aphansi odaka oluxubile, nokungazweli kahle kwamanzi.i

(2) Imikhiqizo yodaka enamazinga ahlukene wamandla wezakhiwo ezijwayelekile zezimboni kanye nezomphakathi ingakhiwa.i

(3) Izindleko zempahla ziphansi kakhulu kunalezo ze-cellulose ether ne-starch ether.

(4) Ukugcinwa kwamanzi kungaphansi kwalokho kwe-ejenti yokugcina amanzi ephilayo, inani lokushwabana elomile lodaka olulungisiwe likhulu, futhi ukuhlangana kuyancipha.i

4. Ukusetshenziswa kwesitashi ether

Isitashi i-ether sisetshenziswa kakhulu ekwakhiweni kodaka, okungase kuthinte ukungaguquguquki kodaka olusekelwe ku-gypsum, usimende kanye nomcako, futhi kushintshe ukwakhiwa nokuphikiswa kwe-sag kodaka.Ama-ether esitashi ngokuvamile asetshenziswa ngokuhambisana nama-cellulose ether angashintshiwe futhi ashintshiwe.Ilungele kokubili izinhlelo ezingathathi hlangothi kanye ne-alkaline, futhi ihambisana nezithasiselo eziningi ze-gypsum kanye nemikhiqizo kasimende (njengama-surfactants, i-MC, isitashi nama-polymers ancibilika emanzini njenge-polyvinyl acetate).

Izici eziyinhloko:

(1) I-starch ether ivamise ukusetshenziswa kuhlanganiswe ne-methyl cellulose ether, okubonisa umphumela omuhle wokusebenzisana phakathi kwakho kokubili.Ukwengeza inani elifanelekile le-starch ether ku-methyl cellulose ether kungathuthukisa ngokuphawulekayo ukumelana nokushelela kanye nokumelana nokushelela kodaka , ngenani lesivuno esiphezulu.i

(2) Ukwengeza inani elifanele le-starch ether odakeni oluqukethe i-methyl cellulose ether kungakhuphula ngokuphawulekayo ukuvumelana kodaka futhi kuthuthukise ukugeleza kwamanzi, kwenze ukwakhiwa kube bushelelezi futhi ukukhuhla kube bushelelezi.(3) Ukwengeza inani elifanelekile le-starch ether odakeni oluqukethe i-methyl cellulose ether kungakhuphula ukugcinwa kwamanzi odaka futhi kwandise isikhathi sokuvula.i

(4) Isitashi i-ether iyi-ether yesitashi eguqulwe ngamakhemikhali encibilika emanzini, ehambisana nezinye izithasiselo odakeni lwempuphu eyomile, esetshenziswa kakhulu ezintweni ezinamathelayo zamathayela, udaka lokulungisa, ukhonkolo oluplasta, i-putty yangaphakathi nengaphandle yodonga, Amalunga ashunyekiwe asuselwa ku-gypsum nezinto zokugcwalisa. , ama-interface agents, udaka lwamatshe.

Izici ze-starch ether ikakhulukazi zilele kokuthi: ⑴ukuthuthukisa ukumelana ne-sag;⑵ ukuthuthukisa ukwakhiwa;⑶ ukwandisa isivuno sodaka, umthamo onconyiwe: 0.03% kuya ku-0.05%.