HPMC na busassun turmi mai gauraya

Halayen HPMC a busasshen turmi gauraye

1, HPMC a cikin halaye na talakawa turmi

Ana amfani da HPMC galibi azaman retarder da wakili mai riƙe ruwa a cikin rabon siminti.A cikin kankare abubuwan da aka gyara da turmi, yana iya haɓaka danko da ƙimar raguwa, ƙarfafa haɗin gwiwa, sarrafa lokacin saita siminti, da haɓaka ƙarfin farko da ƙarfin juzu'i.Domin yana da aikin riƙe ruwa, zai iya rage asarar ruwa a saman coagulation, zai iya kauce wa faruwar fashewa a gefen, kuma zai iya inganta mannewa da aikin ginin.Musamman ma a cikin ginin, zai iya tsawaita da daidaita lokacin saiti, tare da karuwar adadin HPMC, an tsawaita lokacin saita turmi;Inganta machinability da famfo, dace da aikin injiniya;Zai iya inganta aikin ginin kuma ya hana yanayin gishiri mai narkewar ruwa a saman ginin.

2, HPMC a cikin halayen turmi na musamman

HPMC ingantacciyar wakili ce mai riƙe ruwa don busasshen turmi, wanda ke rage yawan zubar jini da matakin ƙima na turmi kuma yana haɓaka haɗin turmi.HPMC na iya inganta ƙarfin ƙarfi da haɗin kai na turmi sosai, kodayake ƙarfin lanƙwasawa da ƙarfin turmi an ɗan rage ta HPMC.Bugu da kari, HPMC na iya hana samuwar robobi a cikin turmi yadda ya kamata, rage ma'aunin fashewar robobi, rike ruwan turmi yana karuwa tare da karuwar dankowar HPMC, sannan idan danko ya wuce 100000mPa•s, rike ruwa ya daina. ya karu sosai.Har ila yau, lafiyar HPMC yana da wani tasiri a kan yawan ajiyar ruwa na turmi, lokacin da barbashi ya yi kyau, an inganta yawan adadin ruwa na turmi, yawanci ana amfani da su don simintin turmi HPMC ya kamata ya zama ƙasa da 180 microns (80 mesh screen). .Abubuwan da suka dace na HPMC a cikin busassun turmi shine 1‰ ~ 3‰.

2.1, turmi HPMC bayan narkar da ruwa, saboda surface aiki rawa don tabbatar da gelled abu yadda ya kamata uniform rarraba a cikin tsarin, da kuma HPMC a matsayin irin m colloid, "kunshin" m barbashi, kuma a kan ta waje surface ta samar da wani Layer na lubrication fim, sa slurry tsarin ne mafi barga, kuma tashe da turmi a cikin hadawa tsari na liquidity da kuma gina zame iya kawai da.

2.2 HPMC bayani saboda da kansa kwayoyin tsarin halaye, sabõda haka, da ruwa a turmi ba sauki a rasa, da kuma sannu a hankali saki a cikin dogon lokaci, bada turmi mai kyau ruwa riƙewa da kuma gina.Yana hana ruwa daga motsi da sauri daga turmi zuwa tushe, don haka ruwan da aka ajiye ya kasance a saman kayan sabo, wanda ke inganta hydration na siminti kuma yana inganta ƙarfin ƙarshe.Musamman, idan haɗin haɗin gwiwa tare da turmi ciminti, filasta da ɗaure ya rasa ruwa, wannan ɓangaren ba shi da ƙarfi kuma kusan babu ƙarfin haɗin gwiwa.Gabaɗaya, saman da ke hulɗa da waɗannan kayan sune jikin adsorption, fiye ko žasa don shayar da ruwa daga saman, yana haifar da wannan ɓangaren hydration bai cika ba, don haka turmin siminti da yumbura da yumbura da yumbura ko filasta karfin metope bond raguwa.

A cikin shirye-shiryen turmi, riƙewar ruwa na HPMC shine babban aikin.An tabbatar da cewa riƙewar ruwa zai iya kaiwa 95%.Haɓaka nauyin kwayoyin HPMC da adadin siminti zai inganta riƙewar ruwa da ƙarfin haɗin turmi.

Misali: saboda mai ɗaurin tayal dole ne ya sami ƙarfin haɗin gwiwa mai ƙarfi tsakanin tushe da tayal, don haka abin ɗaure yana shafar bangarorin biyu na ruwa adsorption;Tushen (bangon) saman da tayal.Fale-falen yumbu na musamman, bambancin ingancin yana da girma sosai, wasu pores suna da girma sosai, ƙimar shayarwar yumbura yana da girma, saboda aikin haɗin gwiwa ya lalace, wakili mai riƙe da ruwa yana da mahimmanci, kuma ƙari na HPMC na iya saduwa da wannan sosai. bukata.

2.3 HPMC yana da kwanciyar hankali ga acid da tushe, kuma maganin sa na ruwa yana da ƙarfi sosai a cikin kewayon pH = 2 ~ 12. Caustic soda da ruwan lemun tsami ba su da tasiri sosai akan kaddarorinsa, amma alkali na iya hanzarta rushewar sa, kuma dan kadan. inganta danko.

2.4, ƙara HPMC turmi yi aikin da aka inganta sosai, turmi alama yana da "mai", na iya sa bango gidajen abinci cike, m surface, sabõda haka, tayal ko bulo da tushe bonding m, kuma zai iya tsawanta lokacin aiki, dace da manyan. yankin gine-gine.

2.5 HPMC wani nau'i ne na electrolyte maras ionic kuma ba polymeric ba.Yana da matukar kwanciyar hankali a cikin bayani mai ruwa tare da gishiri na karfe da kuma kwayoyin electrolytes, kuma ana iya ƙarawa a cikin kayan gini na dogon lokaci don tabbatar da ingantaccen ƙarfinsa.

Tsarin samar da HPMC galibi shine fiber na auduga (na gida) bayan alkalization, etherification da haɓaka samfuran ether na polysaccharide.Ba shi da cajin kansa, kuma baya amsawa tare da ions da aka caje a cikin kayan gelled, kuma aikin sa yana da ƙarfi.Farashin yana ƙasa da sauran nau'ikan ether cellulose, don haka ana amfani dashi sosai a busassun turmi.

Hydroxypropyl methyl cellulose HPMCaiki a bushe gauraye turmi:

HPMCna iya sanya sabon cakuda turmi mai kauri ta yadda za a sami ɗan ɗanko mai ɗanɗano, don hana rarrabuwa.Riƙewar ruwa (kauri) kuma shine mafi mahimmancin dukiya, yana taimakawa wajen kula da adadin ruwan kyauta a cikin turmi, don haka yana ba da kayan siminti mafi lokaci don yin ruwa bayan an yi amfani da turmi.(tsarin ruwa) nasa iska, na iya gabatar da uniform kananan kumfa, inganta gina turmi.

Hydroxypropyl methyl cellulose ether danko mafi girman aikin riƙe ruwa ya fi kyau.Danko shine muhimmin siga na aikin HPMC.A halin yanzu, masana'antun HPMC daban-daban suna amfani da hanyoyi da kayan aiki daban-daban don sanin ɗankowar HPMC.Babban hanyoyin sune HaakeRotovisko, Hoppler, Ubbelohde da Brookfield, da dai sauransu.

Don samfurin iri ɗaya, sakamakon danko da aka auna ta hanyoyi daban-daban sun bambanta sosai, wasu ma bambance-bambance ne.Sabili da haka, lokacin kwatanta danko, dole ne a aiwatar da shi tsakanin hanyar gwajin iri ɗaya, gami da zazzabi, rotor, da sauransu.

Don girman barbashi, mafi kyawun barbashi, mafi kyawun riƙewar ruwa.Large barbashi na cellulose ether lamba tare da ruwa, da surface nan da nan narke da kuma samar da wani gel to kunsa sama da abu don hana ruwa kwayoyin daga ci gaba da shiga, wani lokacin dogon lokaci stirring ba za a iya ko'ina tarwatsa narkar da, samuwar wani laka flocculent bayani ko agglomerate.Solubility na ether cellulose yana daya daga cikin abubuwan da za a zabi ether cellulose.Fineness kuma muhimmin ma'aunin aiki ne na methyl cellulose ether.MC don busassun turmi yana buƙatar foda, ƙananan abun ciki na ruwa, da fineness na 20% ~ 60% girman barbashi kasa da 63um.Fineness yana rinjayar solubility na hydroxypropyl methyl cellulose ether.M ƙwaƙƙwal yawanci granular ne kuma ana iya narkar da shi cikin sauƙi cikin ruwa ba tare da haɓaka ba, amma saurin rushewar yana da jinkirin gaske, don haka bai dace da amfani da busasshiyar turmi ba.A cikin busasshiyar turmi, MC yana tarwatsewa tsakanin jimillar, filaye masu kyau da kayan siminti kamar siminti, kuma foda kawai wanda yake da kyau zai iya guje wa dunkulewar methyl cellulose ether lokacin haɗe da ruwa.Lokacin da MC ya ƙara ruwa don narkar da agglomerate, yana da wuya a tarwatsawa da narkar da shi.MC tare da m fineness ba kawai sharar gida, amma kuma rage gida ƙarfi na turmi.Lokacin da aka gina irin wannan busasshen turmi a wani babban wuri, saurin warkar da busasshen turmi na gida yana raguwa sosai, wanda ke haifar da tsagewar lokacin warkewa daban-daban.Don injin fesa turmi, saboda ɗan gajeren lokacin haɗawa, ƙarancin ya fi girma.

Gabaɗaya magana, mafi girman danko, mafi kyawun tasirin riƙewar ruwa.Duk da haka, mafi girman danko shine, mafi girman nauyin kwayoyin halitta na MC shine, kuma aikin rushewa zai ragu daidai, wanda yana da mummunan tasiri akan ƙarfin da aikin ginin turmi.Mafi girman danko, mafi bayyane tasirin tasirin turmi, amma bai dace da dangantakar ba.Mafi girma da danko, rigar turmi zai zama mafi m, duka gine-gine, aikin ƙwanƙwasa mai laushi da babban mannewa ga kayan tushe.Amma ba taimako ba ne don ƙara ƙarfin tsarin jika.A wasu kalmomi, aikin anti-sag ba a bayyane yake ba yayin gini.Akasin haka, wasu ƙananan danko amma gyare-gyare na methyl cellulose ethers suna da kyakkyawan aiki wajen inganta ƙarfin tsarin jika.

Riƙewar ruwa na HPMC kuma yana da alaƙa da yanayin zafin amfani, kuma riƙewar ruwa na methyl cellulose ether yana raguwa tare da haɓakar zafin jiki.Amma a cikin ainihin kayan aikace-aikacen, yawancin mahalli na busassun turmi sau da yawa za su kasance a cikin babban zafin jiki (fiye da digiri 40) a ƙarƙashin yanayin gini a cikin yanayin zafi, kamar insolation na rani na bangon bangon plastering na waje, wanda sau da yawa ya haɓaka da ƙarfi. siminti da bushewar turmi taurin.Rage yawan riƙewar ruwa yana haifar da tabbataccen jin cewa duka haɓakawa da juriya suna shafar.A cikin wannan yanayin, rage tasirin abubuwan zafin jiki ya zama mahimmanci musamman.Dangane da haka, a halin yanzu ana la'akari da ƙari na methyl hydroxyethyl cellulose ether a matsayin sahun gaba na ci gaban fasaha.Ko da tare da karuwa na methyl hydroxyethyl cellulose sashi (nau'in lokacin rani), ginin da juriya na fata har yanzu ba zai iya biyan bukatun amfani ba.Ta hanyar wasu jiyya na musamman na MC, irin su ƙara darajar etherification, tasirin riƙewar ruwa na MC zai iya kula da sakamako mafi kyau a ƙarƙashin babban zafin jiki, don haka zai iya samar da mafi kyawun aiki a ƙarƙashin yanayi mai tsanani.

Janar HPMC yana da zafin jiki na gel, ana iya raba shi zuwa nau'in 60, 65, 75.Domin talakawa shirye-gauraye turmi yin amfani da kogin yashi Enterprises ya fi zabi high gel zafin jiki 75 HPMC.Matsakaicin HPMC bai kamata ya yi yawa ba, tsayi mai yawa zai ƙara buƙatar ruwa na turmi, zai tsaya a kan filasta, lokacin daɗaɗɗa ya yi tsayi da yawa, yana shafar ginin.Daban-daban turmi kayayyakin zabi daban-daban danko na HPMC, kar a yi amfani da high danko HPMC.Sabili da haka, kodayake samfuran hydroxypropyl methyl cellulose suna da kyau, amma yana da kyau a zaɓi HPMC daidai shine babban alhakin ma'aikatan dakin gwaje-gwaje na kasuwanci.A halin yanzu, akwai da yawa ba bisa doka ba dillalai a cikin fili tare da HPMC, ingancin ne quite matalauta, dakin gwaje-gwaje ya kamata a cikin zabi na wasu cellulose, yi mai kyau gwaji, tabbatar da kwanciyar hankali na turmi kayayyakin, kada ku yi sha'awar cheap. haifar da asarar da ba dole ba.