Ukuhlukaniswa kanye nezimpawu ze-Construction Grade Cellulose

(I-Methyl Chloride) (MC) ifomula yamangqamuzana \ [C6h7o2 (oh) Ngemuva kochungechunge lokuphendula, ukwelashwa kwe-cellulose ether kwenziwa. Ngokuvamile, izinga lokufakwa esikhundleni ngu-1.6 ~ 2.0, kanye nezinga lokufaka esikhundleni sehlukile. Ingeye-ether engeyona eye-moulsose.

1. I-methylcellulose iyanyibilika emanzini abandayo, amanzi ashisayo azobhekana nobunzima, futhi uhla lwe-PH luxazululo lwamanzi luzinze kakhulu phakathi kuka-3/12. Isitashi, iGuar gum nezinye eziningi ezisetshenziswayo ziyahambelana kakhulu. I-Gelation yenzeka lapho izinga lokushisa lifinyelela izinga lokushisa le-gelation.

Ukugcinwa kwamanzi kwe-methylcellose kuncike kwinani layo elingeziwe, i-viscosity, izinhlayiyana zokuphazamiseka kanye nezinga lokuqothula. Ngokuvamile kwandiswa, okuncane, okuphezulu, ukugcinwa kwamanzi okuphezulu. Phakathi kwazo, ukugcinwa kwamanzi kunomthelela omkhulu kunawo wonke, futhi izinga le-visa alifani ngqo nokugcinwa kwamanzi. Izinga lokuchithwa ikakhulukazi lincike ezingeni lokuguqulwa komhlaba kwezinhlayiya ze-cellulose nobunzima bezinhlayiya. Phakathi kwalezi zinto eziphakeme ezingenhla, i-methyl cellulose ne-hydroxyprosell methyl cellulose zinokugcinwa kwamanzi okuphezulu.

Izinguquko zokushisa zingathinta kakhulu ukugcinwa kwamanzi kwe-methyl cellulose. - The phezulu amazinga okushisa, okumbi kakhulu ukugcinwa kwamanzi. Uma izinga lokushisa lodaka lidlula ama-40 ° C, ukugcinwa kwamanzi kwe-methyl cellulose kuzoncishiswa kakhulu, kuthinte kabi ukwakhiwa kodaka.

I-methylcellulose inomthelela omkhulu ekusebenzikeni nasekunamathisweni kodaka. "Ukunamathela" lapha kubhekisa ekunamathisweni phakathi kwethuluzi lesisebenzi soMfakisili kanye ne-Wall Substrate, okungukuthi, ukumelana nokugula kodaka ngodaka. I-Viscosity, amandla e-Mortar Shear, futhi amandla adingekayo ngabasebenzi asebekhonakile nawo akhulu kakhulu, futhi ukwakhiwa kodaka akukuhle. I-methylcellose inamathela emazingeni aphansi kwimikhiqizo ye-cellulose ether.

2. I-Hydroxypropyll Methylcellulose (HPMC) [C 6 H 7 O 2 (och 3) m, och 2 ch (och 2 ch (och 3 ch (och) meth 3] Kuyinto engahlanganisiwe i-ether exubile elungiswe ngochungechunge lokuphendula ngemuva kokusetshenziswa kwe-alkali ecwengekile, lapho kusetshenziswa khona i-propellylene oxide ne-methyl chloride njenge-etherification agents. Izinga lokufaka esikhundleni ngokujwayelekile i-1.2 / 2.0. Izakhiwo zayo ziyahlukahluka ngokuya ngesilinganiso sokuqukethwe kwe-methoxyl nokuqukethwe kwe-hydroxypropyl.

1. I-Hydroxypropyllylylyl methylcellulose ihlukaniswe ngohlobo olushisayo oluncibilikayo nohlobo olusheshayo. Ukushisa kwalo kwe-gelation emanzini ashisayo kuphakeme kakhulu kunalokho kwe-methylcellulose. Kubonisa ukuthuthuka okukhulu ngaphezulu kwe-methylcellulose lapho kuchithwe emanzini abandayo.

I-viscoxyprop methylcellulose ihlobene nesisindo se-molecular, futhi isisindo samangqamuzana siphezulu. Ukushisa futhi kuthinta ukubonakala kwayo, njengoba izinga lokushisa liyanda, ukuhlakanipha kuyancipha. Kodwa-ke, ithonya lokushisa lokuvikelwa kwe-viscosity liphansi kunale le-methyl cellulose. Isixazululo ukubekelwa izitebele eziteshini zasekamelweni.

I-3. Ukugcinwa kwamanzi kwe-hydroxypropylllyllyllylyllel kuncike kwinani layo lokungezwa, ukubonakala, njll.

I-4. I-Hydroxypropyllylylyly iqinile ku-acid ne-alkali, bese kuthi isixazululo saso samanzi sizinzile kakhulu kuhlu lwe-PH lwe-2/12. Ukusebenza kwe-caustic soda namanzi amalimula akunalo ithonya eliningi, kepha i-alkali ingasheshisa izinga layo lokuchithwa, futhi ukubonwa kwandisiwe. I-Hydroxypropyllylylyl iqinile kusawoti ojwayelekile, kepha lapho ukugcwaliswa kwesawoti kuphezulu, ukubonwa kwe-hydroxypropyllllylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylylyllylylylylylylylylylylylylylylylylyllylylylylylyllylylylylylylylylyllylylyllylylylyllylylylylylyllylylylylyllylyllylyllylylylyllose methylcellulose kuvimbela ukwanda.

I-Hydroxypropyll methylcellulose ingahlanganiswa nama-polymers ancibilikisiwe amanzi ukuze wakhe umfaniswano, isixazululo esiphezulu. Njengotshwala be-polyvinyl, isitashi ether, gum yemifino, njll.

Hydroxypropyl methylcellulose has better enzyme resistance than methylcellulose, the possibility of enzymatic degradation of its solution is lower than that of methylcellulose, and the adhesion of hydroxypropylmethylcellulose to mortar construction is higher than that of methylcellulose. isisekelo se-cellulose.

Emithathu, i-Hydroxyyethyl celtulose (HEC) yenziwa kusuka kukotoni ocwengekile iphathwe nge-alkali, phambi kwe-acetone, ne-ethylene oxide njenge-ejenti yokuthezeka. I-degree yayo yokufaka esikhundleni imvamisa i-1.5 / 2.0. Ine-hydrophilicity eqinile futhi kulula ukumunca umswakama.

1. I-Hydroxyyethyl celtulose iyancibilika emanzini abandayo, kepha kunzima ukuncibilikisa emanzini ashisayo. Isixazululo sizinzile ngokushisa okuphezulu futhi asinazo izakhiwo zejeli. Ingasetshenziselwa isikhathi eside ku-high-amazinga okushisa ngodaka, kepha ukugcinwa kwawo kwamanzi kuphansi kunalokho kwe-methyl cellulose.

2. I-Hydroxyyethyl celtuleose iqinile i-general acid ne-alkali. U-Alkali usheshisa ukuchithwa kwawo, futhi ukubonakala kwalo kukhuphuka kancane. Ukuhlakazeka kwalo emanzini kubi kakhulu kunalokho kwe-methyl cellulose ne-hydroxypropylyl methyl cellulose.

I-3. I-Hydroxyyethyl celtulose inokusebenza okuhle okulengiswa ngodaka, kepha isikhathi eside, kwakhiqizwa abanye abantu be-hydroxyethyyl celtulose abasezingeni eliphansi kakhulu kune-methyl cellulose ngenxa yokuqukethwe kwayo kwamanzi okukhulu.

I-4. Izinga lokufaka esikhundleni ngokuvamile lingu-0.4 / 1.4, futhi izinga lokufaka esikhundleni linomthelela omkhulu ekusebenzeni.

I-Carboxymethyl Cellulose inokuhlaziywa okuphezulu, kanye nezimo zokugcina ezijwayelekile ziqukethe amanzi amaningi.

2. I-Carboxymethyl cellulose ikhambi lamanzi alikhiqizi ijeli, i-visa liyancipha lapho izinga lokushisa likhuphuka, futhi i-viscosity ayinakuphikiswa lapho izinga lokushisa lidlula lapho amazinga okushisa edlula u-50 ° C.

Ukuqina kwayo kuthinteka kakhulu ph. Ngokuvamile esetshenziselwa udaka lwe-gypsum, hhayi ngodaka kasimende. Endabeni ye-alkalinity ephezulu, izolahlekelwa ukubonakala kwayo.

Ukugcinwa kwayo kwamanzi kuncipha kakhulu kunalokho kwe-methyl cellulose. UGentar uGentSsum unesibopho sokubuyisa, ukunciphisa amandla. Kepha intengo ye-carboxymethyl celtulose iphansi kakhulu kunaleyo methyl cellulose.