Iselulosi etherukugcinwa kwamanzi
Ukugcinwa kwamanzi odaka kubhekiselele kubuchule bodaka ukubamba kunye nokutshixa amanzi. Iphezulu i-viscosity ye-cellulose ether, ngcono ukugcinwa kwamanzi. Ngenxa yokuba isakhiwo se-cellulose siqulethe i-hydroxyl kunye ne-ether bond, i-hydroxyl kunye neqela le-ether bond ye-athomu ze-oksijini kunye neemolekyuli zamanzi ukuze zidibanise ibhondi ye-hydrogen, ukuze amanzi akhululekile kumanzi okubopha, amanzi ajikelezayo, ukuze adlale indima yokugcina amanzi.
Ukunyibilika kwe-cellulose ether
1. I-coarser cellulose ether kulula ukusabalalisa emanzini ngaphandle kwe-agglomerating, kodwa izinga lokuchithwa licotha kakhulu. I-ether ye-cellulose engaphantsi kwe-60 mesh inyibilika emanzini malunga nemizuzu engama-60.
2. Iinqununu ezintle ze-cellulose ether emanzini zilula ukusabalalisa kwaye azikho i-agglomerate, kwaye izinga lokuchithwa liphakathi. I-Cellulose ether ngaphezu kwe-80 mesh inyibilikiswe emanzini malunga nemizuzu emi-3.
3. I-Ultrafine cellulose ether isasazeka ngokukhawuleza emanzini, ichithwa ngokukhawuleza kwaye yenza i-viscosity esheshayo. I-ether ye-cellulose ngaphezu kwe-120 mesh inyibilika emanzini malunga ne-10-30 imizuzwana.
Okukhona i-cellulose ether icolekileyo, kokukhona ukugcinwa kwamanzi ngcono, amasuntswana arhabaxa eether eselulosi kunye nomphezulu wokudibana namanzi ngokukhawuleza anyibilikiswa kwaye enze i-gel phenomenon. I-glue igubungela izinto zokuthintela iimolekyuli zamanzi ukuba zingaqhubeki nokungena. Ngamanye amaxesha, nokuba ixutywe ixesha elide, isisombululo asikwazi ukuchithwa ngokulinganayo kwaye sinyibilike, senza isisombululo esinodaka okanye i-agglomerate. Iincinci ezintle zichithakala kwaye zinyibilike ngokukhawuleza xa zidibene namanzi ukwenza i-viscosity efanayo.
Ixabiso le-PH le-cellulose ether (i-coagulation ilibazisekile okanye amandla okuqala)
Ixabiso le-PH labavelisi be-cellulose ether ekhaya nakwamanye amazwe lilawulwa ngokusisiseko malunga ne-7, ene-acidic. Ngenxa yokuba kusekho i-dehydrated glucose ring structure kwi-molecular structure ye-cellulose ether, i-dehydrated glucose ring liqela eliphambili elibangela ukulibaziseka kwe-samente. Umsesane we-glucose we-dehydrated unokwenza i-calcium ions kwisisombululo se-cement hydration ifom ye-sugar calcium molecular compounds, ukunciphisa i-calcium ion concentration kwi-cement hydration induction period, ukuthintela ukubunjwa kunye nemvula ye-calcium hydroxide kunye ne-calcium ityuwa crystals, ngaloo ndlela ukulibazisa inkqubo ye-cement hydration. Ukuba ixabiso le-PH liba yimeko yealkaline, udaka luya kuvela kwimeko yamandla kwangoko. Ngoku uninzi lweefektri ukulungelelanisa ixabiso le-PH usebenzisa i-sodium carbonate, i-sodium carbonate luhlobo lwe-agent ekhawulezayo, i-sodium carbonate inokuphucula ukusebenza kwe-particle ye-samente ebusweni, ikhuthaza ukubumbana phakathi kwamasuntswana ukwanda, ukuphucula ngakumbi i-viscosity ye-slurry, i-mortar kunye ne-sodium carbonate kunye ne-calcium ion compound ngokukhawuleza, ibangele ukubunjwa kwe-condensation ettringite ngokukhawuleza. Ke ngoko, ixabiso le-PH kufuneka lihlengahlengiswe ngokuhambelana nabathengi abahlukeneyo kweyona nkqubo yokuvelisa.
Ukufakwa kwegesi ye-ether cellulose
Ukufakwa komoya kwe-ether ye-cellulose kungenxa yokuba i-ether ye-cellulose nayo i-surfactant, umsebenzi we-interface ye-ether ye-cellulose ivela ikakhulu kwi-interface ye-gas-liquid-solid, eyokuqala kukuqaliswa kwamaqamza, kulandelwa kukusasazwa kunye nokumanzisa. I-ether ye-cellulose iqulethe iqela le-alkyl, linciphisa ngokuphawulekayo ukunyanzeliswa komphezulu kunye namandla angaphakathi kwamanzi, isisombululo samanzi kwinkqubo yokuphazamiseka kulula ukuvelisa amaqamza amancinci amancinci avaliweyo.
Ukuxutywa kwe-cellulose ether
I-cellulose ether inyibilika kwi-mortar ngenxa ye-molecular chain ye-methoxy kunye neqela le-hydroxypropyl kwi-slurry kunye ne-calcium ion kunye ne-aluminium ion ekubunjweni kwejeli ye-viscous kwaye izaliswe kwi-gap ye-samente yodaka, iphucula ubuninzi bodaka, idlala indima yokuzaliswa okuguquguqukayo kunye nokuqiniswa. Nangona kunjalo, xa i-matrix edibeneyo icinezelwe, i-polymer ayikwazi ukudlala inkxaso eqinile, ngoko ke amandla kunye nomlinganiselo woxinzelelo lodaka luyancipha.
Ukwenziwa kwefilimu yei-cellulose ether
Ifilimu ye-latex encinci yenziwa phakathi kwe-cellulose ether kunye namasuntswana e-samente emva kokufakwa kwamanzi. Ifilimu inesiphumo sokutywinwa kwaye iphucula into eyomileyo yodaka. Ngenxa yokuba i-ether ye-cellulose inokugcinwa kakuhle kwamanzi, igcina iimolekyuli zamanzi ezaneleyo ngaphakathi kodaka, ngaloo ndlela iqinisekisa amandla e-cement hydration kunye nokuqina kunye nophuhliso olupheleleyo, ukuphucula amandla okubopha udaka, kwangaxeshanye kuphuculwe ukunamathela kodaka lwesamente, udaka luneplastikhi elungileyo kunye nokuqina, ukunciphisa ukuguqulwa kodaka lodaka.
Ixesha lokuposa: Apr-26-2024