Hydroxypropyl methylcellulose yana ba da rigar turmi tare da kyakkyawan danko, wanda zai iya haɓaka ikon haɗin kai tsakanin rigar turmi da tushe mai tushe, da haɓaka aikin anti-sag na turmi.Ana amfani da shi sosai a cikin plastering turmi, tsarin rufin bango na waje da haɗin bulo a turmi.A thickening sakamako na cellulose ether kuma iya ƙara homogeneity da anti-watsawa ikon freshly gauraye siminti tushen kayan, hana delamination, segregation da zub da jini na turmi da kankare, kuma za a iya amfani da fiber kankare, karkashin ruwa kankare da kai compacting kankare. .
Hydroxypropyl methylcelluloseHPMCyana ƙara danko na kayan da ke da siminti daga danko na ether cellulose.Ana amfani da ma'anar "danko" yawanci don kimanta danko na ether cellulose.Dankowar ether cellulose gabaɗaya yana nufin maganin ether cellulose tare da wani taro (kamar 2%).Gudun (ko juyi, kamar 20 rpm), ƙimar danko da aka auna tare da ƙayyadadden kayan aunawa (kamar viscometer na juyawa).
Danko shine muhimmin ma'auni don kimanta aikin ether cellulose.Mafi girma da danko na hydroxypropyl methylcellulose bayani, da mafi kyau danko na tushen siminti kayan, da mafi alhẽri adhesion zuwa substrate, kuma mafi kyau anti-sagging da anti-watsawa damar.Ƙarfi, amma idan ɗanƙoƙinsa ya yi girma, zai yi tasiri ga ruwa da aiki na kayan da ake amfani da su na siminti (kamar manne wuka mai laushi a lokacin aikin gyare-gyaren turmi).Sabili da haka, danko na ether cellulose da ake amfani dashi a cikin busassun busassun turmi yawanci 15,000 ~ 60,000 mPa.S-1, turmi mai daidaita kai da kanka da kanka, wanda ke buƙatar ruwa mai girma, yana buƙatar ƙananan danko na ether cellulose.
Bugu da ƙari, tasirin kauri na hydroxypropyl methylcellulose zai ƙara yawan buƙatar ruwa na kayan da aka dogara da siminti, ta yadda za a kara yawan yawan turmi.
Dankowar hydroxypropyl methylcellulose mafita ya dogara da waɗannan dalilai:
Nauyin kwayoyin halitta (ko digiri na polymerization) da ƙaddamar da ether cellulose, zafin bayani, ƙimar ƙarfi da hanyar gwaji.
1. Matsayi mafi girma na polymerization na ether cellulose kuma mafi girman nauyin kwayoyin halitta, mafi girma da danko na maganin ruwa;
2. A mafi girma da sashi (ko maida hankali) na cellulose ether, da mafi girma da danko da ruwa mai ruwa bayani, amma kula ya kamata a dauka don zaɓar da ya dace sashi lokacin amfani da shi, don haka kamar yadda ba zai shafi yi na turmi da kankare idan sashi ya yi yawa;
3. Kamar yawancin ruwaye, danko na cellulose ether bayani zai ragu tare da karuwar yawan zafin jiki, kuma mafi girman ƙaddamar da ether cellulose, mafi girman tasirin zafin jiki;
4. Maganin ether cellulose yawanci pseudoplastic ne, wanda ke da dukiya na raguwa.Mafi girman adadin shear yayin gwajin, ƙananan danko.
Don haka, haɗin gwiwar turmi zai ragu saboda ƙarfin waje, wanda ke da fa'ida ga aikin ginin turmi, ta yadda turmi zai iya samun kyakkyawan aiki da haɗin kai a lokaci guda.Duk da haka, maganin ether cellulose zai nuna halayen ruwa na Newtonian lokacin da maida hankali ya yi ƙasa sosai kuma danko yana da ƙananan.Lokacin da maida hankali ya karu, maganin zai nuna sannu a hankali ya nuna halayen pseudoplastic ruwa, kuma mafi girma da maida hankali, mafi bayyane pseudoplasticity.
Lokacin aikawa: Dec-20-2022