A cikin turmi mai gauraye, muddin dai ɗan kaɗan necellulose etherzai iya inganta aikin turmi mai ruwa sosai, ana iya ganin cewa cellulose ether babban ƙari ne wanda ke shafar aikin ginin turmi.
Zaɓin nau'ikan iri daban-daban, kamanni daban-daban, girman barbashi daban-daban, matakan kamanni daban-daban da kuma ƙara ethers na cellulose suma suna da tasiri daban-daban akan inganta aikin turmi busasshe. A halin yanzu, turmi da yawa na dutse da na filastik ba su da aikin riƙe ruwa mai kyau, kuma ruwan da ke narkewa zai rabu bayan 'yan mintuna kaɗan na tsayawa. Don haka yana da matukar muhimmanci a ƙara cellulose ether a cikin turmi na siminti.
riƙe ruwa
Rike ruwa muhimmin aiki ne na methyl cellulose ether, kuma aiki ne da masana'antun turmi na busassun na cikin gida, musamman waɗanda ke yankunan kudu masu yanayin zafi mai yawa, ke mai da hankali a kai.
A fannin samar da kayan gini, musamman busasshen turmi, cellulose ether yana taka muhimmiyar rawa, musamman wajen samar da turmi na musamman (turmi da aka gyara), abu ne mai matukar muhimmanci kuma mai muhimmanci.
Danko, yawan amfani, zafin yanayi da tsarin kwayoyin halitta na cellulose ether suna da babban tasiri akan aikin riƙe ruwa. A ƙarƙashin irin wannan yanayi, girman danko na cellulose ether, mafi kyawun riƙe ruwa; mafi girman adadin, mafi kyawun riƙe ruwa. Yawanci, ƙaramin adadin cellulose ether na iya inganta riƙe ruwa na turmi sosai. Lokacin da adadin ya kai wani matsayi Lokacin da matakin riƙe ruwa ya ƙaru, yanayin riƙe ruwa yana raguwa; lokacin da zafin yanayi ya ƙaru, riƙe ruwa na cellulose ether yawanci yana raguwa, amma wasu cellulose ethers da aka gyara suma suna da ingantaccen riƙe ruwa a ƙarƙashin yanayin zafi mai yawa; zaruruwa tare da ƙananan digiri na maye gurbin Vegan ether yana da ingantaccen aikin riƙe ruwa.
Rukunin hydroxyl akan kwayar halittar cellulose ether da kuma atom ɗin oxygen akan haɗin ether za su haɗu da kwayar halittar ruwa don samar da haɗin hydrogen, suna mai da ruwan kyauta zuwa ruwa mai ɗaure, don haka suna taka rawa mai kyau a riƙe ruwa; kwayar halittar ruwa da sarkar ƙwayoyin cellulose ether Interdiffusion yana ba da damar ƙwayoyin ruwa su shiga cikin sarkar ƙwayoyin cellulose ether kuma yana ƙarƙashin ƙarfin ɗaurewa mai ƙarfi, ta haka ne ke samar da ruwa kyauta, ruwa mai ɗaurewa, da inganta riƙe ruwa na siminti; cellulose ether yana inganta sabon siminti. Halayen rheological, tsarin hanyar sadarwa mai ramuka da matsin lamba na osmotic ko halayen samar da fim na cellulose ether suna hana yaɗuwar ruwa.
kauri da thixotropy
Cellulose etheryana ba da turmi mai jika da kyakkyawan ɗanko, wanda zai iya ƙara ƙarfin haɗin gwiwa tsakanin turmi mai jika da kuma matakin tushe, da kuma inganta aikin hana lanƙwasa na turmi. Ana amfani da shi sosai a cikin turmi mai laushi, turmi mai ɗaure tubali da tsarin rufin bango na waje. Tasirin kauri na cellulose ether kuma yana iya ƙara ikon hana wargajewa da daidaituwar kayan da aka haɗa sabo, hana wargajewar abu, rarrabuwa da zubar jini, kuma ana iya amfani da shi a cikin simintin zare, simintin ƙarƙashin ruwa da simintin da ke danne kansa.
Tasirin kauri na cellulose ether akan kayan da aka gina a siminti ya samo asali ne daga danko na maganin cellulose ether. A ƙarƙashin irin wannan yanayi, yawan danko na cellulose ether, mafi kyawun danko na kayan da aka gyara a siminti, amma idan danko ya yi yawa, zai shafi ruwa da aiki na kayan (kamar manna wuka mai rufi). Turmi mai daidaita kansa da siminti mai daidaita kansa, waɗanda ke buƙatar ruwa mai yawa, suna buƙatar ƙarancin danko na cellulose ether. Bugu da ƙari, tasirin kauri na cellulose ether zai ƙara buƙatar ruwa na kayan da aka gina a siminti da kuma ƙara yawan turmi.
Maganin ruwa mai ƙarfi na cellulose ether yana da babban thixotropy, wanda kuma babban siffa ne na cellulose ether. Maganin ruwa na methyl cellulose yawanci yana da pseudoplastic da non-thixotropic fluidity ƙasa da zafin gel ɗinsa, amma yana nuna halayen kwararar Newtonian a ƙarancin ƙimar yankewa. Pseudoplasticity yana ƙaruwa tare da nauyin kwayoyin halitta ko yawan cellulose ether, ba tare da la'akari da nau'in maye gurbin da matakin maye gurbin ba. Saboda haka, cellulose ethers masu matakin danko iri ɗaya, komai MC, HPMC, HEMC, koyaushe za su nuna irin kaddarorin rheological matuƙar yawan maida hankali da zafin jiki suna nan. Ana samar da gels na tsari lokacin da zafin ya ɗaga, kuma kwararar thixotropic sosai ke faruwa.
Yawan maida hankali da ƙarancin danko na cellulose ethers suna nuna thixotropy ko da ƙasa da zafin gel. Wannan kadara tana da matuƙar amfani ga daidaita daidaiton daidaito da kuma raguwa a cikin ginin turmi. Ya kamata a yi bayani a nan cewa girman danko na cellulose ether, mafi kyawun riƙe ruwa, amma mafi girman danko, mafi girman nauyin kwayoyin halitta na cellulose ether, da kuma raguwar narkewar sa, wanda ke da mummunan tasiri ga yawan turmi da aikin gini.
Shigar da iska
Cellulose ether yana da tasirin shigar iska a fili akan sabbin kayan da aka yi da siminti. Cellulose ether yana da ƙungiyoyin hydrophilic (ƙungiyoyin hydroxyl, ƙungiyoyin ether) da ƙungiyoyin hydrophobic (ƙungiyoyin methyl, zoben glucose), kuma yana da aikin surfactant mai aiki a saman, don haka yana da tasirin shigar iska. Tasirin shigar iska na cellulose ether zai haifar da tasirin "ƙwallo", wanda zai iya inganta aikin kayan da aka haɗa sabo, kamar ƙara ƙarfin turmi da santsi yayin aiki, wanda ke taimakawa wajen yaɗuwar turmi; zai kuma ƙara yawan fitar turmi, rage farashin samar da turmi; amma zai ƙara yawan porosity na kayan da aka taurara kuma ya rage halayen injiniyansa kamar ƙarfi da modulus na roba.
A matsayin sinadarin surfactant, cellulose ether yana da tasirin jika ko shafawa akan barbashin siminti, wanda ke ƙara yawan ruwan da aka yi da siminti tare da tasirin shigar da iska, amma tasirin kauri zai rage ruwa. Tasirin ruwa haɗuwa ne na tasirin plasticization da kauri. Gabaɗaya, lokacin da abun cikin cellulose ether ya yi ƙasa sosai, babban aikin shine plasticization ko rage ruwa; lokacin da abun ciki ya yi yawa, tasirin kauri na cellulose ether yana ƙaruwa da sauri, kuma tasirin shigar da iska yana da matuƙar cika. Don haka yana bayyana azaman tasirin kauri ko ƙaruwa a buƙatar ruwa.
jinkirin aiki
Cellulose etherzai tsawaita lokacin saita manna siminti ko turmi, da kuma jinkirta motsin ruwa na siminti, wanda ke da amfani wajen inganta lokacin aiki na kayan da aka haɗa sabo, inganta daidaiton turmi da asarar raguwar siminti akan lokaci, amma kuma yana iya haifar da jinkirin ginawa.
Lokacin Saƙo: Afrilu-25-2024