Bambance-bambance a cikin Abubuwan Halittu na Physicochemical na HPMC da HEMC

Gel zafin jiki alama ce mai mahimmanci na ether cellulose. Maganin ruwa na cellulose ethers suna da kaddarorin thermogelling. Yayin da zafin jiki ya karu, danko yana ci gaba da raguwa. Lokacin da zafin jiki na bayani ya kai wani ƙima, maganin ether cellulose ba ya da kyau, amma yana haifar da farin colloid, kuma a ƙarshe ya rasa danko. Gwajin zafin jiki na gel yana nufin farawa samfurin ether cellulose tare da 0.2% maida hankali na cellulose ether bayani da kuma dumama shi a hankali a cikin wanka na ruwa har sai bayani ya bayyana farin ko ma farin gel, kuma danko ya ɓace gaba daya. Zazzabi na maganin shine zazzabi na gel na ether cellulose.

Matsakaicin methoxy, hydroxypropyl da HPMC yana da takamaiman tasiri akan solubility na ruwa, ƙarfin riƙe ruwa, aikin saman da zazzabi na samfurin. Gabaɗaya magana, HPMC tare da babban abun ciki na methoxyl da ƙarancin abun ciki na hydroxypropyl yana da ingantaccen ruwa mai narkewa da aiki mai kyau, amma zafin gel ɗin yana da ƙasa: haɓaka abun ciki na hydroxypropyl da rage abun ciki na methoxy na iya ƙara yawan zafin jiki na gel. Koyaya, babban abun ciki na hydroxypropyl zai rage yawan zafin jiki na gel, solubility na ruwa da aikin saman. Don haka, masana'antun ether cellulose dole ne su sarrafa abun cikin rukuni sosai don tabbatar da ingantaccen ingancin samfur.

Aikace-aikacen masana'antar gini

HPMC da HEMC suna da ayyuka iri ɗaya a cikin kayan gini. Ana iya amfani da shi azaman mai rarrabawa, wakili mai riƙe ruwa, mai kauri, ɗaure, da sauransu. Ana amfani dashi galibi a cikin gyare-gyaren turmi na siminti da samfuran gypsum. Ana amfani dashi a cikin turmi siminti don haɓaka haɗin kai da aiki, rage flocculation, ƙara danko da raguwa, kuma yana da ayyuka na riƙewar ruwa, rage asarar ruwa a saman kankare, ƙara ƙarfi, hana fasa da yanayi na gishiri mai narkewa da ruwa. da dai sauransu An yi amfani da shi sosai a cikin siminti, gypsum, turmi da sauran kayan. Ana iya amfani da shi azaman wakili mai yin fim, mai kauri, emulsifier da stabilizer don fentin latex da fentin guduro mai narkewa da ruwa. Yana da kyau juriya lalacewa, uniformity da adhesion, inganta surface tashin hankali, acid-tushe kwanciyar hankali da kuma dacewa da karfe pigments. Saboda da kyau danko kwanciyar hankali, shi ne musamman dace a matsayin dispersant a emulsion coatings. Gabaɗaya, kodayake tsarin yana ƙarami, yana aiki da kyau kuma yana da fa'idodi da yawa.

Gel zafin jiki na cellulose ether yana ƙayyade kwanciyar hankali ta thermal a aikace-aikace. Yawan zafin jiki na gel na HPMC yawanci tsakanin 60 ° C da 75 ° C, ya danganta da nau'in, abun cikin rukuni da tsarin samarwa na masana'antun daban-daban. Saboda halaye na ƙungiyar HEMC, yawan zafin jiki na gelation yana da girma, yawanci sama da 80 ° C, don haka kwanciyar hankali a yanayin zafi yana dangana ga HPMC. A cikin aikace-aikacen aikace-aikacen, a cikin yanayin ginin rani mai zafi, ƙarfin riƙe ruwa na HEMC tare da danko iri ɗaya da sashi ya fi na HPMC. Musamman a kudancin kasar, a wasu lokuta ana shafa turmi a yanayin zafi mai zafi. The cellulose ether na low-zazzabi gel zai rasa ta thickening da ruwa-retaining effects a high yanayin zafi, game da shi accelerating hardening na siminti turmi da kuma kai tsaye shafi ginin da tsaga juriya.

Saboda akwai ƙarin ƙungiyoyin hydrophilic a cikin tsarin HEMC, yana da mafi kyawun hydrophilicity. Bugu da ƙari, juriya mai gudana na HEMC shima yana da kyau. Tasirin aikace-aikacen HPMC a cikin tile m zai zama mafi kyau.