Yiziphi izakhiwo ze-carboxymethyl cellulose?

Yiziphi izakhiwo ze-carboxymethyl cellulose?

Impendulo: I-Carboxymethyl Cellulose ibuye ibe nezakhiwo ezihlukile ngenxa yamazinga alo ahlukile wokufaka esikhundleni. Izinga lokufaka esikhundleni, elaziwa nangokuthi degree of etherification, lisho inani elijwayelekile le-H kumaqembu amathathu e-Oh Hydroxyls afakwe esikhundleni yiCh2Coona. Lapho amaqembu amathathu e-hydroxyl endandatho esekwe ku-cellulose ane-0.4 h eqenjini le-hydroxyl elithathelwe indawo yi-carboxymethyl, ingachithwa emanzini. Ngalesi sikhathi, ibizwa nge-0.4 ukufakwa esikhundleni noma i-medium substitution degree (ukufakwa esikhundleni se-0.4-1.2).

Izakhiwo ze-carboxymethyl cellulose:

. Inokuhlakazeka okuhle namandla okubopha.

(2) Isixazululo saso samanzi singasetshenziswa njenge-emulsifier yohlobo lwamafutha / wamanzi nohlobo lwamanzi / kawoyela. Ibuye ibe nekhono lokufaka amafutha ne-wax, futhi i-emulsifier eqinile.

. Kodwa-ke, ngaphandle kwe-Acetate ye-Holy, kusengacishwa kabusha kwikhambi le-sodium hydroxide, kanye ne-precipitates efana ne-barium, i-iron ne-aluminium kuncibilika kalula ku-1% Ammonium Hydroxide Solution.

(4) Lapho ikhambi lihlangabezana nezixazululo ze-organic acid kanye ne-inorganic acid solution, izulu lingenzeka. Ngokusho kokuqashelwa, lapho inani le-PH lingu-2,5, rubicity kanye nezulu seliqalile. Ngakho-ke i-PH 2.5 ingabhekwa njengephuzu elibucayi.

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(6) Izinga lokushisa linethonya elikhulu ekubonisweni kwesisombululo salo esinamanzi. I-visa iyehla ngokulandelana lapho izinga lokushisa likhuphuka, futhi okuphambene nalokho. Ukuqina kokubonakaliswa kwesisombululo samanzi emanzini asemanzini kuhlala kungashintshiwe, kepha i-viscosity ingahle inciphe lapho ifudunyezwa ngenhla kwama-80 ° C isikhathi eside. Ngokuvamile, lapho izinga lokushisa lingadluli ngo-110 ° C, noma ngabe izinga lokushisa ligcinwa amahora ama-3, bese liphola ku-25 ° C, i-viscosity isabuya esimweni sayo sokuqala; Kepha lapho amazinga okushisa efudunyezwa ku-120 ° C amahora angama-2, yize izinga lokushisa libuyiselwa, i-viscoty yehla ngo-18,9%. .

(7) Inani le-PH lizoba nethonya elithile ekubonisweni kwesisombululo salo esinamanzi. Ngokuvamile, lapho i-PH ye-p ye-py-vispusity ikhaphela ngokungathathi hlangothi, ukubonakala kwayo kunomphumela ophakathi nendawo, uma i-PH yayo iphambuka ngaphandle kokungathathi hlangothi, i-viscosity iqala ukwehla kancane; Uma i-PH ye-high-vivcosity ikhawula ngokungathathi hlangothi, ukubonakala kwayo kuyokwehla. Ukwehla okubukhali.

(8) Iyahambisana nezinye izinto ezincibilikayo zamanzi, amathafa kanye nama-resins. Isibonelo, ihambisana ne-glue yesilwane, i-gum arabic, i-glycerin kanye nesitashi esineluleki. Ihambisana futhi nengilazi yamanzi, i-polyvinyl alcohol, urea-formaldehyde resin, melamine-formaldehyde resin, njll., Kepha ngezinga elincane.

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(10) Kunokuvunywa kathathu okuqala ukukhetha kusuka kohlelo lokusebenza. Ku-gypsum, sebenzisa i-livescosity ephakathi (2% isisombululo esinamanzi ku-300-600MPA- s), uma ukhetha i-viscosity ephezulu (1% solution ku-2000mpa · solution ku-2000MPA

(11) Isixazululo saso esinamanzi sisebenza njengesibuyisi e-gypsum.

. Ngemuva kokungcoliswa, ukuhlakanipha kuzokwehla futhi kuzovela isikhutha. Ukungeza inani elifanele lezinto ezilondoloziwe ngaphambi kwesikhathi kungagcina ukubonakala kwalo nokuvimbela isikhutha isikhathi eside. Izindawo ezitholakala ezikhona yilezi:

Isebenza kanjani i-hydroxypropyll methylcellulose njenge-ejenti yokugcina amanzi ye-anhydrite binder?

Impendulo: I-Hydroxypropyl Methylcellulose ingumenzeli ophakeme wokugcina amanzi we-gypsum cementional field. Ngokwanda kokuqukethwe kwe-hydroxypropyllylylyl. Ukugcinwa kwamanzi kwe-gypsum okwenziwe ngesibili kwanda ngokushesha. Lapho kungekho i-ejenti yokugcina amanzi engeziwe, inani lokugcina lamanzi le-gypsum cemented impahla cishe lingama-68%. Lapho inani le-ejenti yokugcina amanzi lingu-0,15%, inani lokugcina lamanzi le-gypsum centerived impahla esetshenzisiwe ingafinyelela ku-90.5%. Kanye nezidingo zokugcinwa kwamanzi zodaka olungezansi. Umthamo we-ejenti yokugcina amanzi udlula u-0,2%, uphinde ukhuphule umthamo, futhi isilinganiso sokugcina samanzi se-gypsum cementional impahla ekhuphuka kancane. Ukulungiselela izinto zokufaka ama-anhydrite. Umthamo ofanele we-hydroxypropyllylylylylylys methylcellulose ngu-0,1% -0.15%.

Yimiphi imiphumela ehlukene ye-cellulose ehlukile ku-plaster of paris?

Impendulo: Kokubili i-carboxymethyl cellulose ne-methyl cellulose kungasetshenziswa njengama-ejenti okugcina amanzi ngodaka lweParis, kepha umphumela we-carboxyboose uphansi kakhulu kune-paris ye-caltule, ngakho-ke kufanelekile ngosawoti we-solis, kunciphise amandla okubuyisa futhi kunciphisa amandla odaka. I-Methyl celtuleose iyinhlangano yokuhlanganiswa ekahle yezinto zokwakha ze-gypsum cementios ezihlanganisa ukugcinwa kwamanzi, ukuqina, ukuqiniswa, nokubona, ngaphandle kokuthi ezinye izinhlobo ziba nomphumela wokubuyisa lapho kukhulu. ephakeme kune-carboxymethyl cellulose. Ngalesi sizathu, iningi lezinto zokugibela izimbotshana ze-gypsum zamukela indlela yokuhlanganisa i-carboxymetyylls cellulose kanye ne-methyl cellulose, futhi ngaphandle kokufaka umphumela we-carboxymethyl, futhi iqinisa imiphumela yabo ye-methylylesyl), futhi isebenze kahle imibono yabo evamile (njengokugcinwa kwayo kwamanzi kanye nokugcinwa kwamanzi). Ngale ndlela, ukusebenza kokugcinwa kwamanzi kwama-gypsum cementional impahla ye-gypsum kanye nokusebenza okuphelele kwe-gypsum cementional impahla ehleliwe, ngenkathi ukukhuphuka kwezindleko kugcinwa endaweni ephansi kakhulu.