01. Nga ahuatanga o te konutai carboxymethylcellulose
Ko te konutai carboxymethyl cellulose he hikohiko polymer anionic.Ko te tohu whakakapinga o te CMC arumoni mai i te 0.4 ki te 1.2.I runga i te ma, ko te ahua he ma, he paura ma ranei.
1. Te pokey o te otinga
Ko te pokey o te wairewa wai CMC ka piki tere me te pikinga o te kukū, me te otinga he ahuatanga rere pseudoplastic.Ko nga otinga he iti ake te whakakapinga (DS=0.4-0.7) he maha nga wa he thixotropy, a ka huri te ahua o te pokey ina whakamahia te kutikuti, ka tangohia ranei ki te otinga.Ka heke te pokey o te wairewa wai CMC me te piki haere o te pāmahana, a ka taea te huri i tenei paanga ki te kore e neke ake te pāmahana ki te 50 °C.I te pāmahana teitei mo te wa roa, ka heke te CMC.Koinei te take he ngawari te huri ma te kiri o te toto me te kino i te wa e ta ana i te tauira raina kikokore.
Ko te CMC e whakamahia ana mo te karaehe me whiriwhiri he hua me te nui o te whakakapinga, ina koa ko te karaehe toto.
2. Te painga o te uara pH ki te CMC
Ko te pokey o te wairewa wai CMC ka noho noa i roto i te awhe pH whanui, a he tino pumau i waenga i te pH 7 me te 9. Me te pH
Ka heke te uara, ka huri te CMC mai i te ahua tote ki te ahua waikawa, he kore e rewa ki te wai ka heke.Ina iti iho te uara pH i te 4, ka huri te nuinga o te ahua tote ki te ahua waikawa, ka heke.Ina kei raro te pH i te 3, ka iti iho te tohu whakakapinga i te 0.5, ka taea te huri katoa mai i te ahua tote ki te ahua waikawa.Ko te uara pH o te huringa oti o te CMC me te nui o te whakakapinga (i runga ake i te 0.9) kei raro iho i te 1. Na reira, ngana ki te whakamahi i te CMC me te nui o te whakakapinga mo te reanga reanga.
3. Te hononga i waenga i te CMC me nga katote whakarewa
Ka taea e nga katote konganuku monovalent te hanga tote wairewa-wai me te CMC, e kore e pa ki te viscosity, te marama me etahi atu ahuatanga o te wairewa wai, engari ko Ag+ he mea kee, ka paheke te otinga.Ko nga katote konganuku rereke, penei i te Ba2+, Fe2+, Pb2+, Sn2+, me etahi atu, ka heke te otinga;Karekau he painga o te Ca2+, Mg2+, Mn2+, aha atu ki te otinga.Ko nga katote konganuku trivalent he tote kore e rewa me te CMC, he toka ranei, he kiri ranei, na reira kaore e taea te whakamaroke i te ferric chloride ki te CMC.
He rangirua kei roto i te paanga tote o te CMC:
(1) E pa ana ki te momo tote whakarewa, te uara pH o te otinga me te tohu o te whakakapinga o te CMC;
(2) E pa ana ki te raupapa whakauru me te tikanga o te CMC me te tote.
Ko te CMC me te nui o te whakakapinga he pai ake te hototahi ki nga tote, a, ko te painga o te taapiri tote ki te otinga CMC he pai ake i te wai tote.
He pai te CMC.No reira, i te wa e whakarite ana i te karaehe osmotic, ko te tikanga tareka te CMC ki roto i te wai i te tuatahi, katahi ka tapirihia te wairewa tote osmotic.
02. Me pehea te mohio ki te CMC i te maakete
Ka whakarōpūhia e te ma
Koeke tino parakore — kei runga ake i te 99.5% te ihirangi;
Koeke parakore ahumahi - kei runga ake i te 96% te ihirangi;
Hua masivesivá — kei runga ake i te 65%.
Ka whakarōpūhia e te pokey
Momo pokey teitei - 1% te pokey otinga kei runga ake i te 5 Pa s;
Momo pokey reo – ko te pokey o te otinga 2% kei runga ake i te 5 Pa s;
Momo pokey iti – 2% te pokey otinga i runga ake i te 0.05 Pa·s.
03. Whakamaramatanga o nga tauira noa
Kei ia kaihanga tana ake tauira, e kiia ana he neke atu i te 500 nga momo.Ko te tauira tino noa e toru nga wahanga: X—Y—Z.
Ko te reta tuatahi e tohu ana mo te whakamahi ahumahi:
F – kōeke kai;
Ahau——koeke ahumahi;
C – karaehe uku;
O – māka hinu.
Ko te reta tuarua e tohu ana i te taumata viscosity:
H – pokey teitei
M——te pokey reo
L – iti pokey.
Ko te reta tuatoru e tohu ana i te tohu o te whakakapinga, a ko tana nama kua wehea ki te 10 ko te tino tohu whakakapinga o te CMC.
Tauira:
Ko te tauira o te CMC ko te FH9, ko te tikanga ko te CMC me te koeke kai, te pokey teitei me te tohu whakakapinga o te 0.9.
Ko te tauira o te CMC ko CM6, ko te tikanga CMC o te karaehe uku, te pokey reo me te tohu whakakapinga o te 0.6.
He rite ano, kei reira ano nga tohu e whakamahia ana i roto i te rongoa, te kakano me etahi atu umanga, he uaua ka kitea ki te whakamahi i te umanga uku.
04. Paerewa Whiriwhiringa Ahumahi Ceramic
1. Viscosity pūmautanga
Koinei te tikanga tuatahi mo te kowhiri i te CMC mo te kara
(1) Kare e tino rerekee te kirikiri i nga wa katoa
(2) Kare e tino rerekee te pokey ki te pāmahana.
2. Thixotropy iti
I roto i te hanga o nga taera kanapa, kaore e taea te thixotropic te slurry glaze, ki te kore ka pa ki te kounga o te mata kanapa, no reira he pai ake te whiriwhiri i te CMC kai-koeke.Hei whakaiti i nga utu, ka whakamahi etahi o nga kaihanga i te CMC-ahumahi, ka ngawari te pa ki te kounga o te karaehe.
3. Kia whai whakaaro ki te tikanga whakamatautau viscosity
(1) Ko te kukū CMC he hononga taupū ki te pokey, no reira me aro ki te tika o te pauna;
(2) Kia tupato ki te rite o te otinga CMC.Ko te tikanga tino whakamatautau ko te whakaoho i te otinga mo te 2 haora i mua i te ine i tona poiketanga;
(3) He nui te awe o te pāmahana ki runga i te viscosity, no reira me aro ki te pāmahana ambient i te wa o te whakamatautau;
(4) Kia tupato ki te tiaki i te otinga CMC kia kore ai e pakaru.
(5) Kia tupato ki te rereketanga i waenga i te pokey me te rite.
Te wa tuku: Hanuere-05-2023