Ko te Cellulose te polymer taiao tino nui i roto i te taiao.He pūhui polymer ahorangi e hono ana e te D-glucose na roto i nga here β-(1-4) glycosidic.Ko te tohu o te polymerization o te cellulose ka tae ki te 18,000, a ko te taumaha ngota ka tae ki etahi miriona.
Ka taea te whakaputa mai i te cellulose mai i te penupenu rakau, i te miro ranei, kare e rewa i roto i te wai, engari ka whakakahahia ki te kawakore, ka whakahiatotia ki te methylene chloride me te propylene oxide, ka horoia ki te wai, ka whakamaroke kia whiwhi ai i te wai-wairewa methyl cellulose (MC) me hydroxypropyl methylcellulose (HPMC), ara, ka whakamahia te methoxy me te hydroxypropoxy ki te whakakapi i nga roopu hydroxyl i runga i nga tuunga C2, C3 me C6 o te hukahuka hei hanga i nga etera cellulose nonionic.
Ko te Methyl cellulose he paura pai kore kakara, he ma ki te kirikiri ma te ahua, me te pH o te otinga kei waenganui i te 5-8.
Ko te ihirangi methoxyl o te methylcellulose e whakamahia ana hei taapiri kai i te nuinga o te waa kei waenga i te 25% me te 33%, ko te tohu whakakapinga e rite ana ko te 17-2.2, ko te tohu o te whakakapinga i waenga i te 0-3.
Hei taapiri kai, ko te ihirangi methoxyl o te hydroxypropyl methylcellulose i te nuinga o te waa kei waenga i te 19% me te 30%, ko te ihirangi hydroxypropoxyl te nuinga kei waenga i te 3% me te 12%.
Tukatuka āhuatanga
kare e taea te huri
Methylcellulose/Hydroxypropylmethylcellulose he āhuatanga whakakaera werawera.
Me rewa te methyl cellulose/hydroxypropyl methyl cellulose ki te wai matao, ki te wai mahana noa ranei.Ka whakawerahia te wairewa wai, ka heke haere tonu te pokey, a ka puta te whakangao ina tae ki tetahi pāmahana.I tenei wa, methyl cellulose/hydroxypropyl methyl cellulose I timata te otinga marama o te propyl methylcellulose ki te huri ki te miraka ma, ka tere te piki o te pokey.
Ka kiia tenei pāmahana ko te wera o te waiariki whakaoho.I te whakamataotanga o te ra, ka tere te heke o te pokey.Ka mutu, ka rite te pihi pokey ina whakamahana ki te kurupae pokey whakawera tuatahi, ka huri te ra ki te otinga, ka huri te otinga ki te reera ka wera ana, ka huri ano te tikanga o te hokinga ki te otinga i muri i te whakamahana ka taea te whakahoki.
Ko te Hydroxypropyl methylcellulose he teitei ake te wera o te waiariki i te methylcellulose me te iti ake o te kaha o te reera.
Pmahi
1. Nga taonga hanga kiriata
Ko nga kiriata i hangaia e te methylcellulose/hydroxypropylmethylcellulose me nga kiriata kei roto e rua ka taea te aukati i te heke o te hinu me te ngaro o te wai, na reira ka mau tonu te hanganga kai.
2. Ngā āhuatanga whakaemulsi
Ka taea e te Methylcellulose/Hydroxypropylmethylcellulose te whakaiti i te awangawanga o te mata me te whakaiti i te kohinga ngako kia pai ake ai te whakaehunga.
3. Mana mate wai
Ka taea e te Methylcellulose/Hydroxypropylmethylcellulose te whakahaere pai i te hekenga makuku o te kai mai i te mīti ki te pāmahana noa, ka taea te whakaiti i te kino, te whakatioatanga huka me nga huringa kakano o te kai na te whakamatao.
4. Mahi piri
Ka whakamahia te Methylcellulose/Hydroxypropylmethylcellulose i roto i nga moni whai hua hei whakawhanake i te kaha here tino pai i te wa e mau tonu ana te makuku me te mana tuku kakara.
5. Kua whakaroa te mahi whakamakuku
Ma te whakamahi i te methylcellulose/hydroxypropylmethylcellulose ka taea te whakaiti i te pokey pumping o te kai i te wa o te tukatuka waiariki, na reira ka tino pai ake te whakaputa.Ka whakaiti i te kohukohu me nga taputapu, ka tere ake te huringa o nga wa, ka pai ake te pai o te waiariki, me te whakaiti i te hanga moni.
6. Maeneene mahi
Ka taea te whakamahi i te Methylcellulose/Hydroxypropylmethylcellulose ki te whakakotahitanga me te māngaro hei whakaputa i te huatahi, ka taea te whakanui ake i te viscosity ahakoa he iti rawa te taapiri.
7. He pumau te otinga i raro i nga tikanga waikawa me te waipiro
Ko nga wairewa Methylcellulose/Hydroxypropylmethylcellulose he pumau ki te pH 3 me te pai o te pumau i roto i nga rongoa kei roto te waipiro.
Te whakamahinga o te methyl cellulose i roto i te kai
Ko te Methyl cellulose he momo etera cellulose kore-ionic i hangaia ma te whakamahi i te cellulose taiao hei rauemi mata me te whakakapi i nga roopu hydroxyl i te wae huka anhydrous i roto i te cellulose me nga roopu methoxy.Kei a ia te pupuri wai, te matotoru, te emulsification, te hanga kiriata, te urutau Te awhe pH whanui me te mahi mata me etahi atu mahi.
Ko te mea tino motuhake ko te waiariki whakahuri, ara, ko tana wairewa wai ka hanga he reera ina whakamahana, ka hoki ki te otinga ina whakamatao.Ka whakamahia nuitia i roto i nga kai tunua, kai parai, kai reka, ranu, hupa, inu, me nga hinu.me te monamona.
Ko te tino ra i roto i te methyl cellulose he kaha ake i te toru nga wa o te methyl cellulose waiariki tikanga, a ka mau i nga taonga whakapiri tino kaha, te pupuri wai me nga ahuatanga pupuri ahua.
Ka taea e nga kai kua oti te hanga kia mau tonu te kakano e hiahiatia ana me te kakano o te waha mo te wa roa atu i muri i te whakamahana ano.Ko nga tono angamaheni ko nga kai tere-tio, hua kaiwhenua, miiti kua oti te hanga, nga ika me nga hua kaimoana me nga hotiti iti ngako.
Wā tuku: Tihema-12-2022