I-Cellulose ether inokugcinwa kakuhle kwamanzi, okunokuthintela ukufuma kwi-mortar emanzi ukuba ingatshi ngaphambi kwexesha okanye ifunxwe lulwaleko olusisiseko, kwaye kuqinisekiswe ukuba isamente imanzi ngokupheleleyo, ngaloo ndlela ekugqibeleni kuqinisekiswe iipropati zoomatshini ze-mortar, eziluncedo ngakumbi kwi-mortar enolwaleko oluncinci kunye ne-base-hot-sorbing layers Okanye i-mortar eyakhiwe phantsi kobushushu obuphezulu kunye neemeko ezomileyo. Isiphumo sokugcina amanzi se-cellulose ether sinokutshintsha inkqubo yokwakha yendabuko kwaye siphucule inkqubela yokwakha. Umzekelo, ukwakhiwa kwe-plaster kungenziwa kwi-substrates ezifunxa amanzi ngaphandle kokumanzisa kwangaphambili.
I-viscosity, idosi, ubushushu obungqongileyo kunye nesakhiwo se-molecular se-cellulose ether zinempembelelo enkulu ekusebenzeni kwayo kokugcinwa kwamanzi. Phantsi kweemeko ezifanayo, okukhona i-viscosity ye-cellulose ether inkulu, kokukhona i-viscosity iphezulu, kokukhona i-dosi iphezulu, kokukhona i-water retention ingcono. Ngokwesiqhelo, inani elincinci le-cellulose ether linokuphucula kakhulu ukugcinwa kwamanzi kwe-mortar. Xa idosi ifikelela kwinqanaba elithile Xa iqondo lokugcinwa kwamanzi lisanda, umkhwa wokugcinwa kwamanzi uyehla; xa ubushushu obungqongileyo bunyuka, ukugcinwa kwamanzi kwe-cellulose ether kudla ngokuncipha, kodwa ezinye ii-cellulose ethers eziguquliweyo nazo zinokugcinwa kwamanzi ngcono phantsi kweemeko zobushushu obuphezulu; iifayibha ezine-degrees eziphantsi zokutshintshwa kwe-Vegan ether zisebenza ngcono ukugcinwa kwamanzi.
Iqela le-hydroxyl kwi-molecule ye-cellulose ether kunye ne-atom yeoksijini kwi-bond ye-ether ziya kudibana ne-molecule yamanzi ukuze zenze i-hydrogen bond, ziguqule amanzi akhululekileyo abe ngamanzi abotshelelweyo, ngaloo ndlela zidlala indima entle ekugcinweni kwamanzi; i-molecule yamanzi kunye ne-cellulose ether molecular chain Interdiffusion ivumela ii-molecule zamanzi ukuba zingene ngaphakathi kwe-cellulose ether macromolecular chain kwaye ziphantsi kwamandla aqinileyo okubopha, ngaloo ndlela zenze amanzi abotshelelweyo kunye namanzi abotshelelweyo, nto leyo ephucula ukugcinwa kwamanzi kwe-cement slurry; i-cellulose ether iphucula i-cement slurry entsha. Iipropati ze-rheological, isakhiwo senethiwekhi enemingxuma kunye noxinzelelo lwe-osmotic okanye iipropati zokwenza ifilimu ze-cellulose ether zithintela ukusasazeka kwamanzi.
I-Cellulose ether inika i-wet mortar i-viscosity egqwesileyo, enokunyusa kakhulu amandla okubopha phakathi kwe-wet mortar kunye nomaleko wesiseko, kwaye iphucule ukusebenza kwe-motar anti-wagging. Isetyenziswa kakhulu kwi-plastering mortar, kwi-brick bonding mortar kunye ne-external wall insulation system. Isiphumo sokuqina kwe-cellulose ether sinokwandisa amandla okulwa nokusasazeka kunye nokuhambelana kwezinto ezisandula ukuxutywa, ukuthintela ukuhlukana kwezinto, ukwahlulwa kunye nokopha, kwaye ingasetyenziswa kwi-fiber concrete, kwi-undermost concrete nakwi-self-compact concrete.
Isiphumo sokutyeba kwe-cellulose ether kwizinto ezisekwe kwisamente sivela kwi-viscosity yesisombululo se-cellulose ether. Phantsi kweemeko ezifanayo, kokukhona i-viscosity ye-cellulose ether iphezulu, kokukhona i-viscosity yezinto ezisekwe kwisamente eziguquliweyo ingcono, kodwa ukuba i-viscosity iphezulu kakhulu, iya kuchaphazela ukutyibilika nokusebenza kwezinto (njengokuncamathisela imela yokuplasta). I-mortar ezizilinganiselayo kunye ne-concrete ezizidibanisayo, ezifuna ukutyibilika okuphezulu, zifuna i-viscosity ephantsi ye-cellulose ether. Ukongeza, isiphumo sokutyeba kwe-cellulose ether siya kunyusa imfuno yamanzi yezinto ezisekwe kwisamente kwaye sonyuse isivuno se-mortar.
Ubuninzi besisombululo se-cellulose ether buxhomekeke kwezi zinto zilandelayo: ubunzima be-molecular ye-cellulose ether, uxinaniso, ubushushu, izinga lokucheba kunye nendlela yovavanyo. Phantsi kweemeko ezifanayo, ubunzima be-molecular ye-cellulose ether bukhulu, kokukhona ubuninzi be-viscosity yesisombululo buphezulu; kokukhona uxinaniso luphezulu, kokukhona ubuninzi be-viscosity yesisombululo buphezulu. Xa uyisebenzisa, kufuneka ulumke ukuze uphephe idosi egqithisileyo kwaye uchaphazele ukusebenza kwe-mortar kunye nekhonkrithi; i-cellulose ether Ubuninzi besisombululo se-ether buya kuncipha ngokunyuka kobushushu, kwaye okukhona uxinaniso luphezulu, kokukhona impembelelo yobushushu iba nkulu; isisombululo se-cellulose ether sihlala silulwelo lwe-pseudoplastic olunepropathi yokucheba, kokukhona isantya sokucheba siba sikhulu ngexesha lovavanyo, kokukhona i-viscosity iba ncinci, ngoko ke, ubumbano lwe-mortar luya kuncipha phantsi kwesenzo samandla angaphandle, okuluncedo ekwakhiweni kwe-mortar, ukuze i-mortar ibe nokusebenza kakuhle kunye nobumbano ngaxeshanye; kuba isisombululo se-cellulose ether asiyo-Newtonian. Kwizinto ezisetyenziswa kulwelo, xa iindlela zovavanyo, izixhobo kunye nezixhobo okanye iindawo zovavanyo ezisetyenziselwa ukuvavanya i-viscosity zahlukile, iziphumo zovavanyo zesisombululo se-cellulose ether esifanayo ziya kwahluka kakhulu.
Iimolekyuli ze-cellulose ether zinokulungisa ezinye iimolekyuli zamanzi zezinto ezintsha kumda wetsheyini yemolekyuli, ngaloo ndlela zonyusa i-viscosity yesisombululo. Iitsheyini ze-molekyuli ze-cellulose ether zidibene ukuze zenze isakhiwo senethiwekhi esinemilinganiselo emithathu, nto leyo eya kwenza isisombululo sayo samanzi sibe ne-viscosity elungileyo.
Isisombululo samanzi se-cellulose ether esine-viscosity ephezulu sine-thixotropy ephezulu, nto leyo ekwaluphawu oluphambili lwe-cellulose ether. Izisombululo zamanzi ze-methyl cellulose zihlala zine-pseudoplastic kunye ne-non-thixotropic fluidity ngaphantsi kobushushu bayo be-gel, kodwa zibonisa iipropati ze-Newtonian flow kwizinga eliphantsi lokucheba. I-Pseudoplasticity iyanda ngobunzima be-molecular okanye uxinzelelo lwe-cellulose ether, nokuba loluphi uhlobo lwe-substituent kunye nenqanaba lokutshintshwa. Ke ngoko, ii-cellulose ethers ze-viscosity grade efanayo, nokuba yi-mc, HPmc, HEmc, ziya kuhlala zibonisa iipropati ezifanayo ze-rheological logama nje uxinzelelo kunye nobushushu zigcinwa zinjalo. Ii-gels zesakhiwo zenziwa xa ubushushu buphakanyisiwe, kwaye kwenzeka ukuhamba kwe-thixotropic ephezulu. Ii-ethers ze-cellulose ezine-viscosity ephezulu kunye ne-viscosity ephantsi zibonisa i-thixotropy nangaphantsi kobushushu be-gel. Le propati iluncedo kakhulu ekulungiseni i-leveling kunye ne-sagging ekwakheni i-building mortar. Kufuneka kuchazwe apha ukuba okukhona i-viscosity ye-cellulose ether iphezulu, kokukhona ukugcinwa kwamanzi kuphezulu, kodwa okukhona i-viscosity iphezulu, kokukhona ubunzima be-molecular ye-cellulose ether buphezulu, kunye nokuncipha kokunyibilika kwayo, okunefuthe elibi kuxinzelelo lwe-mortar kunye nokusebenza kolwakhiwo. Okukhona i-viscosity iphezulu, kokukhona isiphumo sokutyeba sibonakala ngakumbi kwi-mortar, kodwa asilingani ngokupheleleyo. I-viscosity ethile ephakathi nephantsi, kodwa i-modified cellulose ether inokusebenza ngcono ekuphuculeni amandla olwakhiwo lwe-mortar emanzi. Ngokunyuka kwe-viscosity, ukugcinwa kwamanzi kwe-cellulose ether kuyaphucuka.
Ixesha lokuthumela: Feb-28-2023