Hydroxypropyl methyl cellulose (HPMC), ka mea makacellulose, hiki ke hoʻomaʻemaʻe i ka pulupulu a i ʻole ka pulp lāʻau. Pono e pulverize ia ma mua a i ka wā o ka hana alkaliization. Hana ʻia ka pulverization e ka ikehu mechanical. E hoʻopau i ka hoʻohui ʻia o nā mea waiwai cellulose e hōʻemi i ka crystallinity a me ka polymerization degree a hoʻonui i kona ʻili, e hoʻomaikaʻi ai i ka hiki a me ka hiki ke hoʻololi kemika o nā reagents i nā pūʻulu hydroxyl ʻekolu ma ka cellulose macromolecular glucose ring base.
Hydroxypropyl methyl cellulose (HPMC)hoʻohana ʻia e like me ka substrate makaʻala e hana ai i ka aila, hiki ke hoʻomaopopo i ka hoʻohana ʻana i ke kō holoʻokoʻa, hoʻomaikaʻi i ka helu hoʻohana ʻana o nā mea maka, hoʻemi i ke koena o ka substrate i ka broth fermentation, a hoʻemi i ke kumukūʻai o ka mālama wai. ʻO nā hiʻohiʻona omethyl cellulosekūpono i ka optimization o ka batch, fed-batch a me ka hoʻomau ʻana i nā kaʻina hana fermentation, e pale ana i kahi ʻano pilikia e like me ka hoʻomalu ʻana i ka haku mele a me ka dilution rate; i ka manawa like, ua kūpono hoʻi i ka hoʻoponopono ʻana i ke kaʻina hana fermentation. No ka mea, na waiwai ohydroxypropyl methyl cellulose (HPMC)ua like ia me nā ethers hiki ke hoʻoheheʻe ʻia i ka wai, hiki ke hoʻohana ʻia ma ke ʻano he mea hana kiʻiʻoniʻoni, mānoanoa, emulsifier a me ka stabilizer i ka latex coatings a me ka wai-soluble resin coating component, e hiki ai ke hana i nā pale ʻO ke kiʻiʻoniʻoni he kūʻē abrasion maikaʻi, pae. nā waiwai a me ka hoʻopili ʻana, a ua hoʻomaikaʻi i ka ʻili o ka ʻili, kūpaʻa i ka waikawa a me ka alkali, a me ka launa pū me nā puaʻa metala.
Hydroxypropyl methyl cellulose (HPMC)Loaʻa ka hopena maikaʻi ma ke ʻano he mānoanoa no nā uhi polyvinyl acetate wai keʻokeʻo. ʻO ke degere o ka pani ʻana ocellulose eteraua hoʻonui ʻia, a ua hoʻonui pū ʻia ke kūʻē ʻana i ka bacteria a me ka erosion.
ʻOiai ʻaʻole paʻakikī ka manaʻo o ka etherification synthesis o ka hydroxypropyl methylcellulose (HPMC), ʻo ia ka alkalization, ka ʻōpala maka, a me ka alkalization. ʻO nā kaiapuni like ʻole o ka etherification, solvent recovery, centrifugal separation, holoi a maloʻo e pili ana i ka nui o nā ʻenehana nui a me ka ʻike waiwai.
No nā ʻano huahana like ʻole, loaʻa i kēlā me kēia kaiapuni nā kūlana mana hou loa, e like me ka mahana, ka manawa, ke kaomi a me ka hoʻokele waiwai. ʻO nā mea kōkua a me nā mea hoʻokele ka mea e hōʻoiaʻiʻo ʻia a pono no ka maikaʻi o ka huahana paʻa a me ka ʻōnaehana hana hilinaʻi.
Nā hiʻohiʻona huahana ohydroxypropyl methyl cellulose:
1. Pono: He pauka keʻokeʻo kēia huahana, ʻaʻohe ona, ʻono ʻole a ʻaʻohe mea ʻawaʻawa.
2. Ka hopena paʻa wai: No ka mea hiki i kēia huahana ke komo i ka wai i ʻoi aku ke kaumaha ma mua o ia iho. E mālama i ka paʻa wai kiʻekiʻe ma ka mortar, gypsum, pena a me nā huahana ʻē aʻe.
3. Hiki ke hoʻoheheʻe ʻia kēia huahana i loko o ka wai anuanu e hana i kahi mea hoʻoheheʻe viscous.
4. Hoʻoheheʻe ʻia i loko o nā mea hoʻoheheʻe organik: No ka mea aia kekahi nui o nā genes hydrophobic, hiki ke hoʻoheheʻe ʻia kēia huahana i kekahi mau mea hoʻoheheʻe organik, a hiki ke hoʻoheheʻe ʻia i loko o nā mea hoʻoheheʻe hui ʻia o ka wai a me nā mea ola.
5. Ke kū'ē i ka paʻakai: No ka mea he non-ionic a me ka polyelectrolyte kēia huahana, ua paʻa ia i nā wai wai o nā paʻakai metala a i ʻole nā electrolytes organik. I ka nui o ka electrolyte, hiki ke kumu i ka gelation a i ʻole ka ua.
6. Ka hana o ka ʻili: ʻO ka hoʻonā wai o kēia huahana he hana ma luna.
Ka manawa hoʻouna: Nov-29-2021
