Hiki ke hoʻohui ʻia ka hydroxypropyl methyl cellulose a me ka carboxymethyl cellulose sodium.

Hiki ke hui pū ʻia ʻo HPMC a me CMC?

Methyl cellulosehe keʻokeʻo a keʻokeʻo paha e like me ka pauka fibrous a granular paha; ʻAʻohe ʻala, ʻono ʻole. ʻO kēia huahana i ka wai e pehu ana i loko o kahi hopena colloidal maopopo a ʻūlū iki paha; ʻAʻole hiki ke hoʻoheheʻe ʻia i ka ethanol absolute, chloroform a i ʻole diethyl ether. Hoʻopuehu koke ʻia a pehu ʻia i ka wai wela ma 80-90 ℃, a hoʻoheheʻe koke ʻia ma hope o ka hoʻomaʻalili ʻana. Paʻa loa ka hopena wai i ka mahana o ka lumi, a hiki ke gel i ka mahana kiʻekiʻe, a hiki ke loli ka gel me ka hopena me ka mahana.

Loaʻa iā ia ka wettability maikaʻi loa, ka hoʻopuehu ʻana, ka hoʻopili ʻana, ka mānoanoa, ka emulsification, ka paʻa ʻana o ka wai a me ka hoʻokumu ʻana i ka kiʻiʻoniʻoni, a me ka impermeability o ka ʻaila. Loaʻa i ka kiʻiʻoniʻoni ka paʻakikī maikaʻi loa, ka maʻalahi a me ka transparency. No ka mea he non-ionic, hiki ke hoʻohālikelike ʻia me nā emulsifiers ʻē aʻe, akā maʻalahi ka paʻakai ʻana, a paʻa ka hopena ma ka pae o PH2 - 12. Sodium carboxymethyl cellulose ʻO kēia huahana ka paʻakai sodium o ka cellulose carboxymethyl ether, no ka anionic cellulose ether, he pauka fibrous keʻokeʻo a waiū paha, ka nui o ka density 0.5-0.7 g/cubic centimeter, aneane ʻaʻohe ʻala, ʻono ʻole, hygroscopic. Maʻalahi e hoʻopuehu i loko o ka wai i loko o ka hopena gelatinous moakaka, hiki ʻole ke hoʻoheheʻe ʻia i ka ethanol a me nā mea hoʻoheheʻe organik ʻē aʻe.

Ke 6.5 — 8.5 ka pH o ka wai hoʻonā, e emi nui ana ka viscosity o ka slurry ke >10 a i ʻole <5 ka pH, a ʻoi aku ka maikaʻi o ka hana ke 7 ka pH. No ke kūpaʻa wela, piʻi koke ka viscosity ma lalo o 20 ℃, loli mālie ma 45 ℃, a emi nui ka denaturation colloid a me ka viscosity a me nā waiwai ke hoʻomehana ʻia no ka manawa lōʻihi ma luna o 80 ℃. Maʻalahi ka hoʻoheheʻe ʻia i ka wai, ka hopena moakaka; He paʻa loa ia i ka hopena alkaline, a maʻalahi hoʻi e hydrolyze i ka hihia o ka waikawa. Ke 2-3 ka waiwai pH, e hiki mai ka ua, a e hiki mai nō hoʻi ka ua i ka hihia o nā paʻakai metala multivalent. ʻO Hydroxypropyl methyl cellulose, i ʻike ʻia hoʻi ʻo hydroxypropyl methyl cellulose, cellulose hydroxypropyl methyl ether, ʻo ia ke koho ʻana o ka cellulose pulupulu maʻemaʻe loa ma ke ʻano he mea maka, ma lalo o nā kūlana alkaline e ka etherification kūikawā a me ka hoʻomākaukau ʻana.

Hoʻoheheʻe ʻia i ka wai a me ka hapa nui o ka polar C a me ka hapa kūpono o ka ethanol/wai, propanol/wai, dichloroethane, a me nā mea ʻē aʻe, ʻaʻole hoʻoheheʻe ʻia i ka diethyl ether, acetone, ethanol absolute, pehu i ka wai anuanu i loko o kahi hopena colloidal maopopo a ʻūlū iki paha. Loaʻa i ka hopena wai ka hana ʻili, ke ʻano transparency kiʻekiʻe a me ka hana paʻa.HPMCLoaʻa iā ia ka waiwai o ka gel wela. Ma hope o ka hoʻomehana ʻana, hana ka hopena wai o ka huahana i ka ua gel, a laila hoʻoheheʻe ʻia ma hope o ka hoʻomaʻalili ʻana. He ʻokoʻa ka mahana o ka gel o nā kikoʻī like ʻole.