Kusiyana kwa Physicochemical Properties ya HPMC ndi HEMC

Kutentha kwa gel osakaniza ndi chizindikiro chofunikira cha cellulose ether. Njira zamadzimadzi za cellulose ethers zimakhala ndi thermogelling properties. Pamene kutentha kumawonjezeka, kukhuthala kumapitirira kuchepa. Pamene kutentha kwa yankho kumafika pamtengo wina, yankho la cellulose ether siliwonekeranso, koma limapanga colloid yoyera, ndipo pamapeto pake imataya kukhuthala kwake. Kuyeza kutentha kwa gel osakaniza kumatanthawuza kuyambitsa chitsanzo cha cellulose ether ndi 0,2% ndende ya cellulose ether solution ndikutenthetsa pang'onopang'ono mumadzi osamba mpaka yankho likuwoneka loyera kapena gel loyera, ndipo kukhuthala kumatayika kwathunthu. Kutentha kwa yankho ndi kutentha kwa gel osakaniza a cellulose ether.

Chiŵerengero cha methoxy, hydroxypropyl ndi HPMC chimakhudza kwambiri kusungunuka kwa madzi, mphamvu yosungira madzi, ntchito yapamtunda ndi kutentha kwa gel osakaniza. Nthawi zambiri, HPMC yokhala ndi methoxyl yayikulu komanso yotsika ya hydroxypropyl imakhala ndi kusungunuka kwamadzi bwino komanso ntchito yabwino yapamtunda, koma kutentha kwa gel ndi kotsika: kukulitsa zomwe zili ndi hydroxypropyl ndikuchepetsa zomwe zili ndi methoxy kumatha kuwonjezera kutentha kwa gel. Komabe, kuchuluka kwa hydroxypropyl kumachepetsa kutentha kwa gel, kusungunuka kwamadzi ndi ntchito zapamtunda. Choncho, opanga mapadi ether ayenera mosamalitsa kulamulira zili gulu kuonetsetsa khola mankhwala khalidwe.

Ntchito yomanga makampani

HPMC ndi HEMC ali ndi ntchito zofanana mu zomangira. Itha kugwiritsidwa ntchito ngati dispersant, madzi posungira wothandizila, thickener, binder, etc. Zimagwiritsa ntchito akamaumba matope simenti ndi gypsum mankhwala. Amagwiritsidwa ntchito mumatope a simenti kuti awonjezere mgwirizano wake ndi kugwirira ntchito, kuchepetsa kugwedezeka, kuonjezera kukhuthala ndi kuchepa, ndipo ali ndi ntchito zosungira madzi, kuchepetsa kutaya kwa madzi pamtunda wa konkire, kuwonjezera mphamvu, kuteteza ming'alu ndi nyengo ya mchere wosungunuka m'madzi, etc. Amagwiritsidwa ntchito kwambiri mu simenti, gypsum, matope ndi zipangizo zina. Itha kugwiritsidwa ntchito ngati chopangira filimu, thickener, emulsifier ndi stabilizer kwa utoto wa latex ndi utoto wosungunuka ndi madzi. Ili ndi kukana kwabwino kovala, kufananiza ndi kumamatira, imathandizira kukhazikika kwapamtunda, kukhazikika kwa acid-base komanso kugwirizana ndi utoto wazitsulo. Chifukwa chabwino mamasukidwe akayendedwe yosungirako bata, makamaka oyenera ngati dispersant mu zokutira emulsion. Zonsezi, ngakhale dongosololi ndi laling'ono, limagwira ntchito bwino ndipo lili ndi ntchito zambiri.

Kutentha kwa gel osakaniza a cellulose ether kumatsimikizira kukhazikika kwake kwamafuta mukugwiritsa ntchito. Kutentha kwa gel osakaniza a HPMC nthawi zambiri kumakhala pakati pa 60 ° C ndi 75 ° C, kutengera mtundu, zomwe zili m'gulu ndi kupanga kwa opanga osiyanasiyana. Chifukwa cha makhalidwe a gulu la HEMC, kutentha kwake kwa gelation kumakhala kwakukulu, kawirikawiri pamwamba pa 80 ° C, kotero kukhazikika kwake pa kutentha kwakukulu kumatchedwa HPMC. Pogwiritsira ntchito, m'malo omangira chilimwe chotentha, mphamvu yokhala ndi madzi ya HEMC yokhala ndi kukhuthala komweko ndi mlingo ndi yabwino kuposa ya HPMC. Makamaka kum'mwera, matope nthawi zina amagwiritsidwa ntchito pa kutentha kwakukulu. Ether ya cellulose ya gel otsika kutentha idzataya kukhuthala ndi kusunga madzi pa kutentha kwakukulu, potero kufulumizitsa kuuma kwa matope a simenti ndikukhudza mwachindunji kumanga ndi kukana ming'alu.

Chifukwa pali magulu ambiri a hydrophilic mu kapangidwe ka HEMC, ili ndi hydrophilicity yabwino. Kuphatikiza apo, kukana kosunthika kwa HEMC kulinso kwabwino. Kugwiritsa ntchito kwa HPMC pazomatira matayala kudzakhala bwinoko.