ʻO ka Hydroxypropyl methylcellulose (HPMC), ka cellulose maka, hiki ke hoʻomaʻemaʻe ʻia i ka pulupulu a i ʻole ka pulp lāʻau, pono loa ia e ʻoki ʻia ma mua o ka alkalization a i ka wā o ka alkalization, a ʻo ka ʻoki ʻana ma o ka ikehu mechanical E hoʻopau i ke ʻano hui o ka cellulose maka mea e hoʻemi ai i ke kiʻekiʻe o ka. crystallinity a me ka polymerization, e hoʻonui i kona ʻāpana o ka ʻili, ma laila e hoʻomaikaʻi ai i ka hiki a me ka hiki ke hoʻololi kemika o ka reagent reaction i nā pūʻulu hydroxyl ʻekolu ma ka pūʻulu apo glucose o ka macromolecule cellulose.
Hoʻohana ʻia ʻo Hydroxypropyl methylcellulose (HPMC) ma ke ʻano he substrate maka no ka hana ʻana i ka aila, hiki ke hoʻomaopopo i ka hoʻohana ʻana i ka nui o ke kō, hoʻomaikaʻi i ka nui o ka hoʻohana ʻana i nā mea maka, hoʻemi i ke koena o ka substrate i ka broth fermentation, a hoʻemi i ke kumukūʻai o ka wai ʻino. lapaʻau.ʻO kēia hydroxypropyl methylcellulose ʻO nā hiʻohiʻona o ka methylcellulose e kūpono i ka optimization o ka batch, fed-batch a me nā kaʻina hana fermentation mau, e pale ana i nā pilikia e like me ke kāohi ʻana i ka hoʻohui ʻana o ka medium a me ka dilution rate;he mea kūpono hoʻi i ka hoʻoponopono ʻana i ke kaʻina hana fermentation.No ka mea, ua like ka hana o ka hydroxypropyl methylcellulose (HPMC) me nā ethers hiki ke hoʻohana ʻia i loko o ka pena latex a me nā ʻāpana pena resin wai e like me ka mea hana kiʻiʻoniʻoni, thickener, emulsifier a me stabilizer, etc. maikaʻi ke pale ʻana i ke kapa, ka pae ʻana 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 hoʻohālikelike ʻana i nā puaʻa metala.
He hopena maikaʻi ka Hydroxypropyl methylcellulose (HPMC) ma ke ʻano he mānoanoa no ka pena polyvinyl acetate wai keʻokeʻo.Hoʻonui ʻia ka pae o ka hoʻololi ʻana o ka cellulose ether, a hoʻonui pū ʻia ke kūʻē ʻana i ka erosion bacteria.
ʻOiai ʻaʻole paʻakikī ke kumu o ka etherification synthesis o ka hydroxypropyl methyl cellulose (HPMC), pono ia e alkalized, e hoʻoheheʻe ʻia, a alkalized.ʻO kēlā me kēia kaiapuni o ka etherification, solvent recovery, centrifugation, holoi a me ka 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 hana hoʻomalu he mau hōʻoia maikaʻi no ka maikaʻi o ka huahana paʻa a me nā ʻōnaehana hana hilinaʻi.
Ka manawa hoʻouna: Dec-15-2022