Ko te Cellulose ether he puhui polymer i whakahiatohia mai i te cellulose taiao na roto i te tukanga etherification, a he pai rawa atu ki te whakakaha me te pupuri wai.
Rangahau Papamuri
Ko nga etera cellulose kua whakamahia nuitia i roto i te moata whakauru maroke i roto i nga tau kua pahure ake nei, ko te nuinga o te whakamahi ko etahi etera cellulose kore-ionic, tae atu ki te methyl cellulose ether (MC), hydroxyethyl cellulose ether (HEC), hydroxyethyl cellulose ether Methyl cellulose ether (HEMC). ) me te hydroxypropyl methyl cellulose ether (HPMC).I tenei wa, kaore i te maha nga tuhinga mo te tikanga ine o te pokey o te otinga cellulose ether.I roto i to tatou whenua, ko etahi paerewa me nga monographs anake e kii ana i te tikanga whakamatautau mo te viscosity o te otinga cellulose ether.
Ko te tikanga whakarite o te otinga ether cellulose
Te Whakaritenga o te Methyl Cellulose Ether Solution
Ko nga ethers methyl cellulose e tohu ana ki nga ethers cellulose kei roto nga roopu methyl i roto i te ngota, penei i te MC, HEMC me te HPMC.Na te kaha o te waiariki o te roopu methyl, ko nga otinga cellulose ether kei roto i nga roopu methyl he tohu waiariki waiariki, ara, karekau e rewa i roto i te wai wera i te pāmahana teitei ake i te pāmahana whakahiato (mo te 60-80°C).Kia kore ai te otinga eter cellulose e hanga agglomerates, whakamahana i te wai i runga ake i tona pāmahana reera, mo te 80~90°C, katahi ka tapirihia te paura cellulose ether ki roto i te wai wera, whakaohokia kia marara, kia mau tonu te whakaoho me te whakamatao Ki te huinga. te pāmahana, ka taea te whakarite ki te otinga ether cellulose.
Nga ahuatanga memehatanga o nga etero methylcellulose-kore-mata
Hei karo i te agglomeration o te cellulose ether i te wa o te whakangao, ka mahia e nga kaihanga i etahi wa he maimoatanga mata matū ki runga i te paura cellulose ether hua hei whakaroa i te whakakorenga.Ka puta tana tukanga whakakore i muri i te marara katoa o te cellulose ether, na reira ka taea te marara ki roto i te wai makariri me te uara pH koretake me te kore e hanga agglomerates.Ko te teitei ake o te uara pH o te otinga, ka poto ake te wa rewa o te etera cellulose me nga taonga whakaroa kua roa.Whakaritea te uara pH o te otinga ki te uara teitei ake.Ka whakakorehia e te kawakore te roa o te whakarewatanga o te cellulose ether, na te mea ka hanga agglomerates te cellulose ether ina memeha.No reira, me whakaara ake, me whakaheke ranei te uara pH o te otinga i muri i te marara katoa o te etera cellulose.
Ko nga ahuatanga whakarewatanga o nga ethers kei roto i te methylcellulose kua tukinotia i te mata
Te Whakaritenga o Hydroxyethyl Cellulose Ether Solution
Ko te otinga Hydroxyethyl cellulose ether (HEC) karekau he taonga mo te waiariki waiariki, no reira, ka kore te HEC he maimoatanga mata ka hanga agglomerates i roto i te wai wera.Ko te tikanga ka mahia e nga Kaihanga he maimoatanga mata matū i runga i te HEC paura hei whakaroa i te whakakorenga, kia tika ai te marara ki te wai matao me te uara pH koretake me te kore e hanga agglomerates.Waihoki, i roto i te otinga he nui te kawakoretanga, HEC Ka taea hoki te hanga agglomerates na te roa o te ngaronga whakarewatanga.I te mea he kawakore te slurry ciment i muri i te whakamakuku me te uara pH o te otinga kei waenga i te 12 me te 13, he tino tere hoki te tere o te whakakorenga o te etera cellulose i te mata-tukinotia i roto i te slurry sima.
Nga āhuatanga memeha o te HEC kua tukinotia te mata
Te Whakamutunga me te Tatautanga
1. Te mahi marara
Hei karo i nga paanga kino i te wa whakamatautau na te puhoi o te whakakorenga o nga matū maimoatanga mata, ka tūtohutia kia whakamahia te wai wera mo te whakarite.
2. Te mahi whakamatao
Me whakakorikori, ka whakamataohia nga wairewa ether cellulose i te pāmahana ambient hei whakaiti i te reiti whakamatao, me whakaroa nga wa whakamatautau.
3. Te mahi whakakorikori
I muri i te taapiri i te cellulose ether ki te wai wera, kia mau tonu te whakaoho.Ka taka iho te pāmahana wai ki raro i te pāmahana reera, ka tiimata te memeha o te cellulose ether, ka tere haere te wairewa.I tenei wa, me whakaiti te tere o te whakaoho.Ka tae te otinga ki tetahi pokey, me tu tonu mo te neke atu i te 10 haora i mua i te tere tere o nga mirumiru ki te mata kia pakaru, ka ngaro.
Nga Mirumiru Air i roto i te Rongoa Etera Cellulose
4. Te tukanga whakamahana
Ko te kounga o te cellulose ether me te wai kia tika te ine, me te ngana kia kaua e tatari kia eke te otinga ki te pokey teitei ake i mua i te whakakii i te wai.
5. Whakamātautau viscosity
Na te thixotropy o te otinga cellulose ether, i te wa e whakamatautau ana i tona pokey, ka whakauruhia te rotor o te viscometer hurihuri ki roto i te otinga, ka whakararuraru i te otinga ka pa ki nga hua ine.Na reira, i muri i te whakauru o te rotor ki te otinga, me tuku kia tu mo te 5 min i mua i te whakamatautau.
Te wa tuku: Maehe-22-2023